0.18.0

Closes #65

.editorconfig

@@ -1,4 +1,3 @@
-# EditorConfig helps developers define and maintain consistent coding styles between different editors and IDEs
 # editorconfig.org
 
 root = true
@@ -7,11 +6,10 @@ root = true
 indent_style = space
 indent_size = 2
 
-# We recommend you to keep these unchanged
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 
 [*.md]
-trim_trailing_whitespace = false
+trim_trailing_whitespace = false

.gitignore

@@ -20,7 +20,7 @@ coverage
 # nyc test coverage
 .nyc_output
 
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
 .grunt
 
 # Bower dependency directory (https://bower.io/)
@@ -29,14 +29,14 @@ bower_components
 # node-waf configuration
 .lock-wscript
 
-# Compiled binary addons (http://nodejs.org/api/addons.html)
+# Compiled binary addons (https://nodejs.org/api/addons.html)
 build/Release
 
 # Dependency directories
 node_modules/
 jspm_packages/
 
-# Typescript v1 declaration files
+# TypeScript v1 declaration files
 typings/
 
 # Optional npm cache directory
@@ -57,6 +57,29 @@ typings/
 # dotenv environment variables file
 .env
 
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+
+# next.js build output
+.next
+
+# nuxt.js build output
+.nuxt
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+#DynamoDB Local files
+.dynamodb/
+
+########## end of https://github.com/github/gitignore/blob/master/Node.gitignore
+
 # ignore ide files
 .idea
 .vscode

.gitlab-ci.yml

@@ -28,6 +28,16 @@ audit:
   stage: test
   script:
     - npm audit
+  allow_failure: true
+  except:
+    - schedules
+
+scheduled-audit:
+  stage: test
+  script:
+    - npm audit
+  only:
+    - schedules
 
 test:
   dependencies:
@@ -38,6 +48,7 @@ test:
   artifacts:
     paths:
       - report
+      - coverage
 
 pages:
   stage: deploy

.npmignore

@@ -1,12 +1,12 @@
 # Ignore all files/folders by default
 # See https://stackoverflow.com/a/29932318
 /*
-
-# Execept this files/folders
-!docs
+# Except these files/folders
 !lib
+lib/tsconfig.tsbuildinfo
 !LICENSE
 !package.json
 !package-lock.json
 !README.md
 !src
+!test/resources/

CHANGELOG.md

@@ -1,3 +1,88 @@
+# [0.17.0](https://gitlab.com/openstapps/core/compare/v0.16.0...v0.17.0) (2019-04-16)
+
+
+
+# [0.16.0](https://gitlab.com/openstapps/core/compare/v0.15.0...v0.16.0) (2019-04-15)
+
+
+
+# [0.15.0](https://gitlab.com/openstapps/core/compare/v0.14.0...v0.15.0) (2019-04-09)
+
+
+### Bug Fixes
+
+* change SCThingMeta getInstance() return value ([4986042](https://gitlab.com/openstapps/core/commit/4986042))
+* resolve issues with things that can be offered ([623ed61](https://gitlab.com/openstapps/core/commit/623ed61)), closes [#41](https://gitlab.com/openstapps/core/issues/41)
+
+
+### Features
+
+* provide context based search ([3242411](https://gitlab.com/openstapps/core/commit/3242411))
+
+
+
+# [0.14.0](https://gitlab.com/openstapps/core/compare/v0.13.0...v0.14.0) (2019-04-03)
+
+
+### Features
+
+* add model for plugin register route ([8188731](https://gitlab.com/openstapps/core/commit/8188731))
+
+
+
+# [0.13.0](https://gitlab.com/openstapps/core/compare/v0.12.0...v0.13.0) (2019-04-02)
+
+
+### Bug Fixes
+
+* correct isThing guard ([67868e9](https://gitlab.com/openstapps/core/commit/67868e9))
+* update tslint  dependencies ([bbe4fca](https://gitlab.com/openstapps/core/commit/bbe4fca))
+
+
+### Features
+
+* add conditional "maps" for associated types ([c8bda2e](https://gitlab.com/openstapps/core/commit/c8bda2e)), closes [#50](https://gitlab.com/openstapps/core/issues/50)
+* provide sample JSON files with the package ([5d1e79d](https://gitlab.com/openstapps/core/commit/5d1e79d)), closes [#46](https://gitlab.com/openstapps/core/issues/46)
+
+
+
+# [0.12.0](https://gitlab.com/openstapps/core/compare/v0.11.0...v0.12.0) (2019-03-14)
+
+
+### Bug Fixes
+
+* add todo to SCThingsWithoutDiff and SCClasses ([9a49442](https://gitlab.com/openstapps/core/commit/9a49442)), closes [#39](https://gitlab.com/openstapps/core/issues/39)
+
+
+### Features
+
+* add SCThingTranslator class. move functionality accordingly ([90e3d22](https://gitlab.com/openstapps/core/commit/90e3d22))
+
+
+
+# [0.11.0](https://gitlab.com/openstapps/core/compare/v0.10.0...v0.11.0) (2019-02-21)
+
+
+### Features
+
+* add laboratory and computer as room categories ([a0ab72e](https://gitlab.com/openstapps/core/commit/a0ab72e)), closes [#33](https://gitlab.com/openstapps/core/issues/33)
+* add maxRequestBodySize in backend configuration ([b5bd09e](https://gitlab.com/openstapps/core/commit/b5bd09e))
+
+
+
+# [0.10.0](https://gitlab.com/openstapps/core/compare/v0.9.0...v0.10.0) (2019-02-18)
+
+
+### Features
+
+* add model for requestBodyTooLargeError ([bc3a0f6](https://gitlab.com/openstapps/core/commit/bc3a0f6))
+
+
+
+# [0.9.0](https://gitlab.com/openstapps/core/compare/v0.8.0...v0.9.0) (2019-02-14)
+
+
+
 # [0.8.0](https://gitlab.com/openstapps/core/compare/v0.7.0...v0.8.0) (2019-02-13)
 
 

CONTRIBUTING.md

@@ -2,6 +2,32 @@
 
 Please see the appropriate general group contributing guides in [project-management](https://gitlab.com/openstapps/projectmanagement/tree/master/project-docs/workflow).
 
+## Updating and releasing related projects
+
+Following semantic versioning patches to the core should not break existing usage.
+
+### API 
+
+Every minor and major version of the core needs a corresponding version of the [API](https://openstapps.gitlab.io/api) to be used in the app and connectors.
+
+Because the API is an integral part of the App and Node.js-based connectors this should be done for every new minor and major release of the core.
+
+### Backend
+
+The [backend](https://openstapps.gitlab.io/backend) uses the core to validate requests and responses. With the use of the [core tools](https://openstapps.gitlab.io/core-tools) it uses the core to set up the database according to the model.
+
+Like for the API there should be a new release of the backend for every minor and major release of the core.
+
+### Core tools
+
+The [core tools](https://openstapps.gitlab.io/core-tools) are more or less not dependent on a specific core version and should normally not need adjustments for new core versions as long the structure of the code in the core stays the same.
+
+### App and connectors
+
+[App](https://openstapps.gitlab.io/app) and connectors use the API to communicate with the backend. To ensure compatibility the version of the used core must be the same as the one that is used in the used API.
+
+App and connectors should be updated regularly to new releases of the core but not as important like API and backend. Since the app is just a view for the data stored in the backend it is not necessary to be up to date with the newest core immediately and the connectors are developed independently by every school and up to their responsibility.
+
 ## Additional coding style
 
 ### Extract inline type definitions 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@openstapps/core",
-  "version": "0.9.0",
+  "version": "0.18.0",
   "description": "StAppsCore - Generalized model of data",
   "keywords": [
     "Model",
@@ -14,51 +14,76 @@
   "main": "./lib/index.js",
   "types": "./lib/index.d.ts",
   "scripts": {
-    "build": "npm run tslint && npm run compile && npm run pack && npm run schema && npm run documentation",
+    "build": "npm run tslint && npm run compile && npm run pack && npm run schema",
     "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s -r 0 && git add CHANGELOG.md && git commit -m 'docs: update changelog'",
     "check-configuration": "openstapps-configuration",
-    "compile": "tsc",
-    "documentation": "typedoc --includeDeclarations --excludeExternals --mode modules --out docs src",
+    "compile": "rimraf lib && tsc",
+    "documentation": "typedoc --name \"@openstapps/core\" --includeDeclarations --mode modules --out docs --readme README.md --listInvalidSymbolLinks lib",
     "pack": "openstapps-core-tools pack",
-    "prepublishOnly": "npm run build",
+    "prepublishOnly": "npm ci && npm run build",
     "schema": "node --max-old-space-size=8192 --stack-size=10240 ./node_modules/.bin/openstapps-core-tools schema src/core lib/schema",
-    "test": "mocha --require ts-node/register --ui mocha-typescript test/*.spec.ts",
+    "test": "nyc mocha --require ts-node/register --ui mocha-typescript test/*.spec.ts",
     "tslint": "tslint 'src/**/*.ts'"
   },
-  "author": "Karl-Philipp Wulfert <krlwlfrt@gmail.com",
+  "author": "Karl-Philipp Wulfert <krlwlfrt@gmail.com>",
   "contributors": [
     "Anselm Stordeur <anselmstordeur@gmail.com>",
-    "Jovan Krunic <jovan.krunic@gmail.com>",
+    "Jovan Krunić <jovan.krunic@gmail.com>",
     "Andreas Lehmann",
     "Sebastian Lange",
     "Rainer Killinger",
-    "Imran Hossain"
+    "Imran Hossain",
+    "Michel Jonathan Schmitz",
+    "Wieland Schöbl"
   ],
   "dependencies": {
     "@types/geojson": "1.0.6",
     "@types/json-patch": "0.0.30",
+    "fast-clone": "1.5.13",
     "json-patch": "0.7.0",
-    "jsonschema": "1.2.4"
+    "jsonschema": "1.2.4",
+    "ts-optchain": "0.1.3"
   },
   "devDependencies": {
-    "@openstapps/configuration": "0.6.0",
-    "@openstapps/core-tools": "0.3.0",
+    "@krlwlfrt/async-pool": "0.1.0",
+    "@openstapps/configuration": "0.12.0",
+    "@openstapps/core-tools": "0.6.0",
     "@openstapps/logger": "0.0.5",
     "@types/chai": "4.1.7",
-    "@types/humanize-string": "1.0.0",
-    "@types/node": "11.9.3",
+    "@types/node": "10.14.4",
     "@types/rimraf": "2.0.2",
-    "async-pool-native": "0.1.0",
     "chai": "4.2.0",
-    "commander": "2.19.0",
-    "conventional-changelog-cli": "2.0.11",
-    "humanize-string": "1.0.2",
-    "mocha": "5.2.0",
+    "commander": "2.20.0",
+    "conventional-changelog-cli": "2.0.12",
+    "mocha": "6.1.4",
     "mocha-typescript": "1.1.17",
+    "nyc": "14.0.0",
     "rimraf": "2.6.3",
-    "ts-node": "8.0.2",
-    "tslint": "5.12.1",
+    "ts-node": "8.1.0",
+    "tslint": "5.15.0",
     "typedoc": "0.14.2",
-    "typescript": "3.3.3"
+    "typescript": "3.4.3"
+  },
+  "nyc": {
+    "check-coverage": true,
+    "per-file": true,
+    "lines": 95,
+    "statements": 95,
+    "functions": 95,
+    "branches": 95,
+    "include": [
+      "src/core/Route.ts",
+      "src/core/Thing.ts",
+      "src/core/Translator.ts"
+    ],
+    "exclude": [],
+    "extension": [
+      ".ts"
+    ],
+    "reporter": [
+      "html",
+      "text-summary"
+    ],
+    "all": true
   }
 }

src/core/Classes.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018, 2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -12,55 +12,62 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCAcademicEvent, SCAcademicEventMeta} from './things/AcademicEvent';
-import {SCArticle, SCArticleMeta} from './things/Article';
-import {SCBook, SCBookMeta} from './things/Book';
-import {SCBuilding, SCBuildingMeta} from './things/Building';
-import {SCCatalog, SCCatalogMeta} from './things/Catalog';
-import {SCDateSeries, SCDateSeriesMeta} from './things/DateSeries';
-import {SCDiff, SCDiffMeta} from './things/Diff';
-import {SCDish, SCDishMeta} from './things/Dish';
-import {SCFavorite, SCFavoriteMeta} from './things/Favorite';
-import {SCFloor, SCFloorMeta} from './things/Floor';
-import {SCMessage, SCMessageMeta} from './things/Message';
-import {SCOrganization, SCOrganizationMeta} from './things/Organization';
-import {SCPerson, SCPersonMeta} from './things/Person';
-import {SCPointOfInterest, SCPointOfInterestMeta} from './things/PointOfInterest';
-import {SCRoom, SCRoomMeta} from './things/Room';
-import {SCSemester, SCSemesterMeta} from './things/Semester';
-import {SCSetting, SCSettingMeta} from './things/Setting';
-import {SCSportCourse, SCSportCourseMeta} from './things/SportCourse';
-import {SCTicket, SCTicketMeta} from './things/Ticket';
-import {SCTour, SCTourMeta} from './things/Tour';
-import {SCVideo, SCVideoMeta} from './things/Video';
+import {SCThingType} from './Thing';
+import {SCAcademicEvent, SCAcademicEventMeta, SCAcademicEventWithoutReferences} from './things/AcademicEvent';
+import {SCArticle, SCArticleMeta, SCArticleWithoutReferences} from './things/Article';
+import {SCBook, SCBookMeta, SCBookWithoutReferences} from './things/Book';
+import {SCBuilding, SCBuildingMeta, SCBuildingWithoutReferences} from './things/Building';
+import {SCCatalog, SCCatalogMeta, SCCatalogWithoutReferences} from './things/Catalog';
+import {SCCourseOfStudies, SCCourseOfStudiesMeta, SCCourseOfStudiesWithoutReferences} from './things/CourseOfStudies';
+import {SCDateSeries, SCDateSeriesMeta, SCDateSeriesWithoutReferences} from './things/DateSeries';
+import {SCDiff, SCDiffMeta, SCDiffWithoutReferences} from './things/Diff';
+import {SCDish, SCDishMeta, SCDishWithoutReferences} from './things/Dish';
+import {SCFavorite, SCFavoriteMeta, SCFavoriteWithoutReferences} from './things/Favorite';
+import {SCFloor, SCFloorMeta, SCFloorWithoutReferences} from './things/Floor';
+import {SCMessage, SCMessageMeta, SCMessageWithoutReferences} from './things/Message';
+import {SCOrganization, SCOrganizationMeta, SCOrganizationWithoutReferences} from './things/Organization';
+import {SCPerson, SCPersonMeta, SCPersonWithoutReferences} from './things/Person';
+import {SCPointOfInterest, SCPointOfInterestMeta, SCPointOfInterestWithoutReferences} from './things/PointOfInterest';
+import {SCRoom, SCRoomMeta, SCRoomWithoutReferences} from './things/Room';
+import {SCSemester, SCSemesterMeta, SCSemesterWithoutReferences} from './things/Semester';
+import {SCSetting, SCSettingMeta, SCSettingWithoutReferences} from './things/Setting';
+import {SCSportCourse, SCSportCourseMeta, SCSportCourseWithoutReferences} from './things/SportCourse';
+import {SCStudyModule, SCStudyModuleMeta, SCStudyModuleWithoutReferences} from './things/StudyModule';
+import {SCTicket, SCTicketMeta, SCTicketWithoutReferences} from './things/Ticket';
+import {SCToDo, SCToDoMeta, SCToDoWithoutReferences} from './things/ToDo';
+import {SCTour, SCTourMeta, SCTourWithoutReferences} from './things/Tour';
+import {SCVideo, SCVideoMeta, SCVideoWithoutReferences} from './things/Video';
 
 /* tslint:disable:variable-name */
 /**
  * A map of things, from type to meta data
  */
-export const SCClasses = {
+export const SCClasses: { [K in SCThingType]: any } = {
   /* tslint:enable */
   'academic event': SCAcademicEventMeta,
-  article: SCArticleMeta,
-  book: SCBookMeta,
-  building: SCBuildingMeta,
-  catalog: SCCatalogMeta,
+  'article': SCArticleMeta,
+  'book': SCBookMeta,
+  'building': SCBuildingMeta,
+  'catalog': SCCatalogMeta,
+  'course of studies': SCCourseOfStudiesMeta,
   'date series': SCDateSeriesMeta,
-  diff: SCDiffMeta,
-  dish: SCDishMeta,
-  favorite: SCFavoriteMeta,
-  floor: SCFloorMeta,
-  message: SCMessageMeta,
-  organization: SCOrganizationMeta,
-  person: SCPersonMeta,
+  'diff': SCDiffMeta,
+  'dish': SCDishMeta,
+  'favorite': SCFavoriteMeta,
+  'floor': SCFloorMeta,
+  'message': SCMessageMeta,
+  'organization': SCOrganizationMeta,
+  'person': SCPersonMeta,
   'point of interest': SCPointOfInterestMeta,
-  room: SCRoomMeta,
+  'room': SCRoomMeta,
   'semester': SCSemesterMeta,
-  setting: SCSettingMeta,
+  'setting': SCSettingMeta,
   'sport course': SCSportCourseMeta,
-  ticket: SCTicketMeta,
-  tour: SCTourMeta,
-  video: SCVideoMeta,
+  'study module': SCStudyModuleMeta,
+  'ticket': SCTicketMeta,
+  'todo': SCToDoMeta,
+  'tour': SCTourMeta,
+  'video': SCVideoMeta,
 };
 
 export type SCThingsWithoutDiff =
@@ -69,6 +76,7 @@ export type SCThingsWithoutDiff =
   | SCBook
   | SCBuilding
   | SCCatalog
+  | SCCourseOfStudies
   | SCDateSeries
   | SCDish
   | SCFavorite
@@ -81,7 +89,9 @@ export type SCThingsWithoutDiff =
   | SCSemester
   | SCSetting
   | SCSportCourse
+  | SCStudyModule
   | SCTicket
+  | SCToDo
   | SCTour
   | SCVideo;
 
@@ -96,3 +106,63 @@ export type SCThings =
  * A field of a thing
  */
 export type SCThingsField = keyof SCThings | string;
+
+/**
+ * Thing without references for a thing
+ */
+export type SCAssociatedThingWithoutReferences<THING extends SCThings> =
+  THING extends SCAcademicEvent ? SCAcademicEventWithoutReferences :
+    THING extends SCArticle ? SCArticleWithoutReferences :
+      THING extends SCBook ? SCBookWithoutReferences :
+        THING extends SCBuilding ? SCBuildingWithoutReferences :
+          THING extends SCCatalog ? SCCatalogWithoutReferences :
+            THING extends SCCourseOfStudies ? SCCourseOfStudiesWithoutReferences :
+              THING extends SCDateSeries ? SCDateSeriesWithoutReferences :
+                THING extends SCDiff ? SCDiffWithoutReferences :
+                  THING extends SCDish ? SCDishWithoutReferences :
+                    THING extends SCFavorite ? SCFavoriteWithoutReferences :
+                      THING extends SCFloor ? SCFloorWithoutReferences :
+                        THING extends SCMessage ? SCMessageWithoutReferences :
+                          THING extends SCOrganization ? SCOrganizationWithoutReferences :
+                            THING extends SCPerson ? SCPersonWithoutReferences :
+                              THING extends SCPointOfInterest ? SCPointOfInterestWithoutReferences :
+                                THING extends SCRoom ? SCRoomWithoutReferences :
+                                  THING extends SCSemester ? SCSemesterWithoutReferences :
+                                    THING extends SCSetting ? SCSettingWithoutReferences :
+                                      THING extends SCSportCourse ? SCSportCourseWithoutReferences :
+                                        THING extends SCStudyModule ? SCStudyModuleWithoutReferences :
+                                          THING extends SCTicket ? SCTicketWithoutReferences :
+                                            THING extends SCToDo ? SCToDoWithoutReferences :
+                                              THING extends SCTour ? SCTourWithoutReferences :
+                                                THING extends SCVideo ? SCVideoWithoutReferences :
+                                                  never;
+
+/**
+ * Thing for a thing without references
+ */
+export type SCAssociatedThing<THING extends SCThings> =
+  THING extends SCAcademicEventWithoutReferences ? SCAcademicEvent :
+    THING extends SCArticleWithoutReferences ? SCArticle :
+      THING extends SCBookWithoutReferences ? SCBook :
+        THING extends SCBuildingWithoutReferences ? SCBuilding :
+          THING extends SCCatalogWithoutReferences ? SCCatalog :
+            THING extends SCCourseOfStudiesWithoutReferences ? SCCourseOfStudies :
+              THING extends SCDateSeriesWithoutReferences ? SCDateSeries :
+                THING extends SCDiffWithoutReferences ? SCDiff :
+                  THING extends SCDishWithoutReferences ? SCDish :
+                    THING extends SCFavoriteWithoutReferences ? SCFavorite :
+                      THING extends SCFloorWithoutReferences ? SCFloor :
+                        THING extends SCMessageWithoutReferences ? SCMessage :
+                          THING extends SCOrganizationWithoutReferences ? SCOrganization :
+                            THING extends SCPersonWithoutReferences ? SCPerson :
+                              THING extends SCPointOfInterestWithoutReferences ? SCPointOfInterest :
+                                THING extends SCRoomWithoutReferences ? SCRoom :
+                                  THING extends SCSemesterWithoutReferences ? SCSemester :
+                                    THING extends SCSettingWithoutReferences ? SCSetting :
+                                      THING extends SCSportCourseWithoutReferences ? SCSportCourse :
+                                        THING extends SCStudyModuleWithoutReferences ? SCStudyModule :
+                                          THING extends SCTicketWithoutReferences ? SCTicket :
+                                            THING extends SCToDoWithoutReferences ? SCToDo :
+                                              THING extends SCTourWithoutReferences ? SCTour :
+                                                THING extends SCVideoWithoutReferences ? SCVideo :
+                                                  never;

src/core/Thing.ts

@@ -12,11 +12,9 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThingsField} from './Classes';
 import {SCOrganization} from './things/Organization';
 import {SCPerson} from './things/Person';
-import {isThingWithTranslations} from './types/Guards';
-import {SCTranslations} from './types/i18n';
+import {SCMetaTranslations, SCTranslations} from './types/i18n';
 import {SCISO8601Date} from './types/Time';
 import {SCUuid} from './types/UUID';
 
@@ -43,6 +41,7 @@ export enum SCThingType {
   Semester = 'semester',
   Setting = 'setting',
   SportCourse = 'sport course',
+  StudyModule = 'study module',
   Ticket = 'ticket',
   ToDo = 'todo',
   Tour = 'tour',
@@ -189,117 +188,6 @@ export interface SCThingUserOrigin extends SCThingOrigin {
   updated?: SCISO8601Date;
 }
 
-/**
- * Meta information about things
- */
-export class SCThingMeta {
-  /**
-   * Translations of fields
-   */
-  static fieldTranslations: any = {
-    de: {
-      alternateNames: 'alternative Namen',
-      description: 'Beschreibung',
-      image: 'Bild',
-      name: 'Name',
-      translations: 'Übersetzungen',
-      type: 'Typ',
-      uid: 'Identifikation',
-      url: 'URL',
-    },
-    en: {
-      alternateNames: 'alternate names',
-      description: 'description',
-      uid: 'identification',
-    },
-  };
-
-  /**
-   * Translations of values of fields
-   */
-  static fieldValueTranslations: any = {
-    de: {
-      type: {
-        AcademicTerm: 'Studienabschnitt',
-        Article: 'Artikel',
-        Book: 'Buch',
-        Catalog: 'Katalog',
-        Date: 'Termin',
-        Diff: 'Unterschied',
-        Dish: 'Essen',
-        Event: 'Veranstaltung',
-        Favorite: 'Favorit',
-        FloorPlan: 'Etagenplan',
-        Message: 'Nachricht',
-        Offer: 'Angebot',
-        Organization: 'Organisation',
-        Person: 'Person',
-        Place: 'Ort',
-        Setting: 'Einstellung',
-        Thing: 'Ding',
-        Ticket: 'Ticket',
-        Tour: 'Tour',
-        Video: 'Video',
-      },
-    },
-  };
-
-  /**
-   * Get field translation
-   *
-   * @param {keyof SCTranslations<T extends SCThing>} language Language to get field translation for
-   * @param {keyof T} field Field to get translation for
-   * @returns {string} Translated field or field itself
-   */
-  static getFieldTranslation<T extends SCThing>(language: keyof SCTranslations<T>,
-                                                field: SCThingsField): string {
-    if (typeof this.fieldTranslations[language] !== 'undefined'
-      && typeof this.fieldTranslations[language][field] !== 'undefined') {
-      return this.fieldTranslations[language][field];
-    }
-
-    return field as string;
-  }
-
-  /**
-   * Get field value translation
-   *
-   * @param {keyof SCTranslations<T>} language Language to get value translation for
-   * @param {string} field Field to get value translation for
-   * @param {T} thing SCThing to get value translation for
-   * @returns {string} Translated value or value itself
-   */
-  static getFieldValueTranslation<T extends SCThing>(language: keyof SCTranslations<T>,
-                                                     field: SCThingsField,
-                                                     thing: T): string {
-
-    let translations: SCTranslations<SCThingTranslatableProperties>;
-
-    if (isThingWithTranslations(thing)) {
-      translations = thing.translations;
-
-      const languageTranslations: SCThingTranslatableProperties | undefined = translations[language];
-
-      if (typeof languageTranslations !== 'undefined') {
-        if (typeof (languageTranslations as any)[field] !== 'undefined') {
-          return (languageTranslations as any)[field];
-        }
-      }
-    }
-
-    // get translation from meta object
-    if (typeof this.fieldValueTranslations[language] !== 'undefined'
-      && typeof this.fieldValueTranslations[language][field] !== 'undefined'
-      && typeof (thing as any)[field] !== 'undefined'
-      && typeof this.fieldValueTranslations[language][field][(thing as any)[field]]) {
-      return this.fieldValueTranslations[language][field][(thing as any)[field]];
-    }
-
-    // fallback to value itself
-    return (thing as any)[field];
-  }
-}
-
 /**
  * Translatable properties of things
  */
@@ -327,3 +215,65 @@ export interface SCThingTranslatablePropertyOrigin {
    */
   name: string;
 }
+
+/**
+ * Meta information about things
+ */
+export class SCThingMeta implements SCMetaTranslations<SCThing> {
+  /**
+   * Set type definiton for singleton instance
+   */
+  protected static _instance = new Map<string, unknown>();
+
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      alternateNames: 'alternative Namen',
+      description: 'Beschreibung',
+      image: 'Bild',
+      name: 'Name',
+      origin: 'Ursprung',
+      translations: 'Übersetzungen',
+      type: 'Typ',
+      uid: 'Identifikation',
+      url: 'URL',
+    },
+    en: {
+      alternateNames: 'alternate names',
+      description: 'description',
+      image: 'image',
+      name: 'name',
+      origin: 'origin',
+      translations: 'translations',
+      type: 'type',
+      uid: 'identification',
+      url: 'URL',
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      type: 'Ding',
+    },
+    en: {
+      type: 'Thing',
+    },
+  };
+
+  /**
+   * Function to retrieve typed singleton instance
+   */
+  public static getInstance<T extends SCThingMeta>(): T {
+    if (!this._instance.has(this.name)) {
+      this._instance.set(this.name, new this());
+    }
+    return this._instance.get(this.name) as T;
+  }
+
+  protected constructor() {}
+}

src/core/Translator.ts

@@ -0,0 +1,341 @@
+/*
+ * Copyright (C) 2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {SCClasses} from './Classes';
+import {SCThing, SCThingType} from './Thing';
+
+import {isThing} from './types/Guards';
+import {SCTranslations} from './types/i18n';
+
+import clone = require('fast-clone');
+import {Defined, OCType} from 'ts-optchain';
+
+/**
+ * SCThingTranslator class
+ */
+export class SCThingTranslator {
+
+  /**
+   * Property representing the translators target language
+   */
+  private _language: keyof SCTranslations<SCThing>;
+
+  /**
+   * Property representing the translators base language
+   * This means every translation is given for this language
+   */
+  private cache: LRUCache<SCThing>;
+
+  /**
+   * Property providing a mapping from a SCThingType to its known own meta class
+   */
+  private metaClasses: typeof SCClasses;
+
+  /** 
+   * @constructor
+   * @example
+   * // returns translator instance for german
+   * new SCThingTranslator('de');
+   */
+  constructor(language: keyof SCTranslations<SCThing>, cacheCapacity: number = 200) {
+    this.cache = new LRUCache(cacheCapacity);
+    this._language = language;
+    this.metaClasses = SCClasses;
+  }
+
+  /**
+   * Getter for language property
+   */
+  get language(): keyof SCTranslations<SCThing> {
+    return this._language;
+  }
+
+  /**
+   * Setter for language property. Also flushes translation cache
+   *
+   * @param language The language the translator instance will use from now on
+   */
+  set language(language: keyof SCTranslations<SCThing>) {
+    if (language !== this._language) {
+      this.cache.flush();
+    }
+    this._language = language;
+  }
+
+  /**
+   * Get field value translation recursively
+   *
+   * @param data The intermediate object / primitive returned by the Proxys get() method
+   * @returns an OCType<T> object allowing for access to translations or a translated value(s)
+   */
+  private deeptranslate<T>(data?: T): OCType<T> {
+    const proxy = new Proxy(
+      ((defaultValue?: Defined<T>) => (data == null ? defaultValue : data)) as OCType<T>,
+      {
+        get: (target, key) => {
+          const obj: any = target();
+          return this.deeptranslate(obj[key]);
+        },
+      },
+    );
+    return proxy;
+  }
+
+  /**
+   * Applies only known field translations of the given SCThings meta class to an instance
+   *
+   * @param thingType The type of thing that will be translated
+   * @param language The language the thing property values are translated to
+   * @returns The thing with all known meta values translated
+   */
+  private getAllMetaFieldTranslations<T extends SCThing>(thingType: SCThingType,
+                                                         language: keyof SCTranslations<T>): object | undefined {
+    const fieldTranslations = {};
+    const metaClass = this.getMetaClassInstance(thingType);
+    if (typeof metaClass === 'undefined') {
+      return undefined;
+    }
+
+    // Assigns every property in fieldTranslations to the known base language translation
+    if (typeof metaClass.fieldTranslations.en !== 'undefined') {
+      Object.keys(metaClass.fieldTranslations.en).forEach((key) => {
+        (fieldTranslations as any)[key] = metaClass.fieldTranslations.en[key];
+      });
+    }
+
+    // Assigns every property in fieldTranslations to the known translation in given language
+    if (typeof metaClass.fieldTranslations[language] !== 'undefined') {
+      Object.keys(metaClass.fieldTranslations[language]).forEach((key) => {
+        (fieldTranslations as any)[key] = metaClass.fieldTranslations[language][key];
+      });
+    }
+    return fieldTranslations;
+  }
+
+  /**
+   * Returns meta class needed for translations given a SCThingType
+   *
+   * @param thingType 
+   * @returns An instance of the metaclass
+   */
+  private getMetaClassInstance(thingType: SCThingType): any {
+    if (thingType in this.metaClasses) {
+      return new (this.metaClasses as any)[thingType]();
+    }
+    return undefined;
+  }
+
+  /**
+   * Applies known field value translations of the given SCThings meta class to an instance
+   * Translated values overwrite current values inplace (destructive)
+   *
+   * @param language The language the thing is translated to
+   * @param thing The thing that will be translated
+   * @returns The thing with translated meta field values
+   */
+  private replaceAvailableMetaFieldValueTranslations(instance: any,
+                                                     language: keyof SCTranslations<any>): any {
+    const metaClass = this.getMetaClassInstance(instance.type);
+    if (typeof metaClass === 'undefined') {
+      return instance;
+    }
+    if (typeof metaClass.fieldValueTranslations[language] !== 'undefined') {
+      Object.keys(metaClass.fieldValueTranslations[language]).forEach((key) => {
+        if (metaClass.fieldValueTranslations[language][key] instanceof Object) {
+          // Assigns known translations of subproperties to property in given language (e.g. categories)
+          Object.keys((instance as any)[key]).forEach((subKey) => {
+            (instance as any)[key][subKey] =
+              metaClass.fieldValueTranslations[language][key][(instance as any)[key][subKey]];
+          });
+        } else {
+          // Assigns property to known translation of fieldValueTranslations in given language
+          (instance as any)[key] = metaClass.fieldValueTranslations[language][key];
+        }
+      });
+    }
+    return instance;
+  }
+
+  /**
+   * Get field value translation recursively
+   * @example
+   * const dish: SCDish = {...};
+   * translator.translate(dish).offers[0].inPlace.categories[1]());
+   * // or
+   * const dishTranslatedAccess = translator.translate(dish);
+   * dishTranslatedAccess.offers[0].inPlace.categories[1]();
+   * // undoing the OCType<T>
+   * const dishAsBefore: SCDish = dishTranslatedAccess()!;
+   * @param data Top level object that gets passed through the recursion
+   * @returns an OCType<T> object allowing for access to translations or a translated value(s)
+   */
+  public translate<T extends SCThing>(data: T): OCType<T> {
+    return new Proxy(
+      ((defaultValue?: Defined<T>) => (data == null ? defaultValue : data)) as OCType<T>,
+      {
+        get: (target, key) => {
+          const obj: any = target();
+          const objTranslatedFromCache = this.cache.get(data);
+          if (typeof objTranslatedFromCache !== 'undefined') {
+            return this.deeptranslate((objTranslatedFromCache as any)[key]);
+          }
+          const objTranslated = this.translateWholeThingDestructively(clone(obj));
+          this.cache.putObject(objTranslated);
+          return this.deeptranslate(objTranslated[key]);
+        },
+      },
+    );
+  }
+
+  /**
+   * Given a SCThingType this function returns an object with the same basic structure as the corresponding SCThing
+   * All the values will be set to the known translations of the property/key name
+   * @example
+   * const translatedMetaDish = translator.translatedPropertyNames<SCCourseOfStudies>(SCThingType.CourseOfStudies);
+   * @param language The language the object is translated to
+   * @param thingType
+   * @returns An object with the properties of the SCThingType where the values are the known property tranlations
+   */
+  public translatedPropertyNames<T extends SCThing>(thing: T,
+                                                    language?: keyof SCTranslations<T>): T | undefined {
+    const targetLanguage = (language) ? language : this.language;
+    // return {...{}, ...this.getAllMetaFieldTranslations(thing.type, targetLanguage) as T};
+    return this.getAllMetaFieldTranslations(thing.type, targetLanguage) as T;
+  }
+
+  /**
+   * Recursively translates the given object in-place
+   * Translated values overwrite current values (destructive)
+   *
+   * @param language The language the thing is translated to
+   * @param thing The thing that will be translated
+   * @returns The thing translated
+   */
+  public translateWholeThingDestructively(instance: any,
+                                          language?: keyof SCTranslations<any>): any {
+    const targetLanguage = (language) ? language : this.language;
+    // Recursively call this function on all nested SCThings, arrays and objects
+    Object.keys(instance).forEach((key) => {
+      if (
+        isThing((instance as any)[key]) ||
+        instance[key] instanceof Array ||
+        instance[key] instanceof Object) {
+        instance[key] = this.translateWholeThingDestructively(instance[key], targetLanguage);
+      }
+    });
+
+    // Spread variable translations given by the connector into thing
+    if (typeof instance.translations !== 'undefined') {
+      if (typeof instance.translations![targetLanguage] !== 'undefined') {
+        instance = {...instance, ...instance.translations![targetLanguage]} as typeof instance;
+      }
+    }
+    // Spread known translations from meta classes into (partly) translated thing
+    this.replaceAvailableMetaFieldValueTranslations(instance, targetLanguage);
+    return instance;
+  }
+
+}
+
+/**
+ * LRUCache class 
+ * Small last recently used cache intended to get used by SCThingTranslator
+ */
+class LRUCache<T> {
+  /**
+   * Map property that manages cached content
+   */
+  private entries: Map<string, T> = new Map<string, T>();
+
+  /**
+   * Property representing cache maximum capacity
+   */
+  private maxEntries: number;
+
+  /** 
+   * @constructor
+   * @example
+   * // returns LRUCache instance with a maximum capacity of 500
+   * new LRUCache(500);
+   */
+  constructor(maxEntries: number) {
+    this.maxEntries = maxEntries;
+  }
+
+  /**
+   * Flushes cache / removes all entries
+   */
+  public flush() {
+    this.entries.clear();
+  }
+
+  /**
+   * Get content from cache by key
+   */
+  public get(somethingOrKey: string): T | undefined;
+
+  /**
+   * Get content from cache by another objects uid
+   */
+  public get<U extends SCThing>(something: U): T | undefined;
+
+  /**
+   * Get content from cache by key or by another objects uid
+   *
+   * @param somethingOrKey The key which maps to the cached content or an object for which content has been cached 
+   * @returns If available the content connected to the key or somethingOrKey.uid property
+   */
+  public get<U extends SCThing>(somethingOrKey: string | U): T | undefined {
+    let key: string;
+    if (typeof somethingOrKey === 'string') {
+      key = somethingOrKey;
+    } else if (isThing(somethingOrKey)) {
+      key = somethingOrKey.uid;
+    } else {
+      throw new Error(`Passed argument ${somethingOrKey} cannot be key in LRUCache`);
+    }
+
+    const entry = this.entries.get(key);
+    if (entry) {
+      // LRU behavior
+      this.entries.delete(key);
+      this.entries.set(key, entry);
+    }
+    return entry;
+  }
+
+  /**
+   * Place content in cache by key
+   *
+   * @param key The key for which content should be cached
+   * @param content The content that should be cached
+   */
+  public put(key: string, content: T) {
+    if (this.entries.size >= this.maxEntries) {
+      // LRU behavior
+      const keyToDelete = this.entries.keys().next().value;
+      this.entries.delete(keyToDelete);
+    }
+    this.entries.set(key, content);
+  }
+
+  /**
+   * Place content in cache by another objects uid
+   * 
+   * @param something The object that should be cached under something.uid
+   */
+  public putObject<U extends SCThing>(something: U) {
+      this.put(something.uid, (something as any) as T);
+  }
+}

src/core/base/AcademicDegree.ts

@@ -14,6 +14,7 @@
  */
 import {SCThing} from '../Thing';
 import {SCThingMeta} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
 
 /**
  * An academic degree without references
@@ -40,19 +41,31 @@ export interface SCAcademicDegreeWithoutReferences extends SCThing {
 export interface SCAcademicDegree extends SCAcademicDegreeWithoutReferences {
 }
 
-export class SCAcademicDegreeMeta extends SCThingMeta {
-  static fieldTranslations = {
-    ...SCThingMeta.fieldTranslations,
+/**
+ * Meta information about academic degrees
+ */
+export class SCAcademicDegreeMeta extends SCThingMeta implements SCMetaTranslations<SCAcademicDegree> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
     de: {
+      ...SCThingMeta.getInstance().fieldTranslations.de,
       academicDegree: 'Hochschulgrad',
       academicDegreewithField: 'Abschlussbezeichnungen',
       academicDegreewithFieldShort: 'Abschlussbezeichnungen (kurz)',
     },
+    en: {
+      ...SCThingMeta.getInstance().fieldTranslations.en,
+    },
   };
 
-  static fieldValueTranslations = {
-    ...SCThingMeta.fieldValueTranslations,
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations = {
     de: {
+      ...SCThingMeta.getInstance().fieldValueTranslations.de,
       academicDegree: {
         'bachelor': 'Bachelor',
         'diploma': 'Diplom',
@@ -64,6 +77,9 @@ export class SCAcademicDegreeMeta extends SCThingMeta {
         'state examination': 'Staatsexamen',
       },
     },
+    en: {
+      ...SCThingMeta.getInstance().fieldValueTranslations.en,
+    },
   };
 }
 

src/core/base/AcademicTerm.ts

@@ -12,7 +12,8 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThing} from '../Thing';
+import {SCThing, SCThingMeta} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
 import {SCISO8601Date} from '../types/Time';
 
 /**
@@ -44,3 +45,32 @@ export interface SCAcademicTermWithoutReferences extends SCThing {
    */
   startDate: SCISO8601Date;
 }
+
+/**
+ * Meta information about academic terms
+ */
+export class SCAcademicTermWithoutReferencesMeta extends SCThingMeta implements SCMetaTranslations<SCThing> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+    },
+  };
+}

src/core/base/CreativeWork.ts

@@ -12,10 +12,10 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThing, SCThingTranslatableProperties} from '../Thing';
+import {SCThing, SCThingMeta, SCThingTranslatableProperties} from '../Thing';
 import {SCOrganizationWithoutReferences} from '../things/Organization';
 import {SCPersonWithoutReferences} from '../things/Person';
-import {SCLanguage, SCTranslations} from '../types/i18n';
+import {SCLanguage, SCMetaTranslations, SCTranslations} from '../types/i18n';
 import {SCISO8601Date} from '../types/Time';
 import {
   SCAcademicPriceGroup,
@@ -78,3 +78,32 @@ export interface SCCreativeWorkTranslatableProperties
    */
   keywords?: string[];
 }
+
+/**
+ * Meta information about creative works
+ */
+export class SCCreativeWorkMeta extends SCThingMeta implements SCMetaTranslations<SCCreativeWork> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+    },
+  };
+}

src/core/base/Event.ts

@@ -12,10 +12,11 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThing} from '../Thing';
+import {SCThing, SCThingMeta} from '../Thing';
 import {SCCatalogWithoutReferences} from '../things/Catalog';
 import {SCPersonWithoutReferences} from '../things/Person';
 import {SCSemesterWithoutReferences} from '../things/Semester';
+import {SCMetaTranslations} from '../types/i18n';
 import {SCCreativeWorkWithoutReferences} from './CreativeWork';
 
 /**
@@ -68,3 +69,32 @@ export interface SCEvent extends SCEventWithoutReferences {
    */
   performers?: SCPersonWithoutReferences[];
 }
+
+/**
+ * Meta information about events
+ */
+export class SCEventMeta extends SCThingMeta implements SCMetaTranslations<SCEvent> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+    },
+  };
+}

src/core/base/Place.ts

@@ -12,8 +12,9 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThing} from '../Thing';
+import {SCThing, SCThingMeta, SCThingTranslatableProperties} from '../Thing';
 import {SCGeoInformation} from '../types/GeoInformation';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 import {SCPostalAddress} from '../types/PostalAddress';
 
 /**
@@ -38,4 +39,43 @@ export interface SCPlaceWithoutReferences extends SCThing {
    * @see http://wiki.openstreetmap.org/wiki/Key:opening_hours/specification
    */
   openingHours?: string;
+
+  /**
+   * Translated fields of a place
+   */
+  translations?: SCTranslations<SCPlaceWithoutReferencesTranslatableProperties>;
+
+}
+
+export interface SCPlaceWithoutReferencesTranslatableProperties extends SCThingTranslatableProperties {
+  address?: SCPostalAddress;
+}
+
+/**
+ * Meta information about creative works
+ */
+export class SCPlaceWithoutReferencesMeta extends SCThingMeta implements SCMetaTranslations<SCPlaceWithoutReferences> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+    },
+  };
 }

src/core/base/SaveableThing.ts

@@ -17,14 +17,19 @@ import {SCThing, SCThingUserOrigin} from '../Thing';
 /**
  * An encapsulation of the data (e.g. a thing) that is saved, which provides additional information.
  */
-export interface SCSaveableThing<T extends SCThing> extends SCThing {
-  /**
-   * The contained data
-   */
-  data: T;
-
+export interface SCSaveableThingWithoutReferences extends SCThing {
   /**
    * Type of the origin
    */
   origin: SCThingUserOrigin;
 }
+
+/**
+ * An encapsulation of the data (e.g. a thing) that is saved, which provides additional information.
+ */
+export interface SCSaveableThing<T extends SCThing> extends SCSaveableThingWithoutReferences {
+  /**
+   * The contained data
+   */
+  data: T;
+}

src/core/base/ThingInPlace.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018-2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -12,20 +12,42 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThing} from '../Thing';
-import {SCBuildingWithoutReferences} from '../things/Building';
-import {SCPointOfInterestWithoutReferences} from '../things/PointOfInterest';
-import {SCRoomWithoutReferences} from '../things/Room';
+import {SCThing, SCThingMeta} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
+import {SCInPlace} from '../types/Places';
 
 /**
  * A thing that is or happens in a place
  */
-export interface SCThingInPlace extends SCThing {
+export interface SCThingInPlace extends SCThing, SCInPlace {}
+
+/**
+ * Meta information about thing in a place
+ */
+export class SCThingInPlaceMeta extends SCThingMeta implements SCMetaTranslations<SCThingInPlace> {
   /**
-   * Place the thing is or happens in
+   * Translations of fields
    */
-  inPlace?:
-    SCBuildingWithoutReferences
-    | SCPointOfInterestWithoutReferences
-    | SCRoomWithoutReferences;
+  fieldTranslations = {
+    de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
+      inPlace: 'Ort',
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+      inPlace: 'location',
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+    },
+  };
 }

src/core/base/ThingThatAcceptsPayments.ts

@@ -12,7 +12,8 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThing} from '../Thing';
+import {SCThing, SCThingMeta} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
 
 /**
  * Types of payment that are accepted at a place.
@@ -31,3 +32,33 @@ export interface SCThingThatAcceptsPaymentsWithoutReferences extends SCThing {
    */
   paymentsAccepted?: SCThingThatAcceptsPaymentsAcceptedPayments[];
 }
+
+/**
+ * Meta information about a thing without references that accepts payments
+ */
+export class SCThingThatAcceptsPaymentsWithoutReferencesMeta extends SCThingMeta implements
+             SCMetaTranslations<SCThingThatAcceptsPaymentsWithoutReferences> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+    },
+  };
+}

src/core/base/ThingThatCanBeOffered.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018, 2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -13,19 +13,20 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {SCThing, SCThingTranslatableProperties} from '../Thing';
-import {SCBuildingWithoutReferences} from '../things/Building';
 import {SCOrganizationWithoutReferences} from '../things/Organization';
 import {SCPersonWithoutReferences} from '../things/Person';
-import {SCPointOfInterestWithoutReferences} from '../things/PointOfInterest';
-import {SCRoomWithoutReferences} from '../things/Room';
 import {SCTranslations} from '../types/i18n';
+import {SCInPlace} from '../types/Places';
 import {SCISO8601Date} from '../types/Time';
 
 /**
- * A map from group name to price
+ * Default price without distinction
  */
 export interface SCPriceGroup {
-  [s: string]: number | undefined;
+  /**
+   * Default price of the thing
+   */
+  default: number;
 }
 
 /**
@@ -49,24 +50,31 @@ export interface SCAcademicPriceGroup extends SCPriceGroup {
 }
 
 /**
- * A thing without references that has a price tag
+ * A thing without references that can be offered
  */
-export interface SCThingThatCanBeOffered<T extends SCPriceGroup> extends SCThing {
-  /**
-   * List of offers for that thing
-   */
-  offers?: Array<SCThingThatCanBeOfferedOffer<T>>;
-
+export interface SCThingThatCanBeOfferedWithoutReferences extends SCThing {
   /**
    * Translations of a thing that can be offered
    */
   translations?: SCTranslations<SCThingThatCanBeOfferedTranslatableProperties>;
 }
 
+/**
+ * A thing that can be offered
+ */
+export interface SCThingThatCanBeOffered<T extends SCPriceGroup>
+  extends SCThing {
+  /**
+   * List of offers for that thing
+   */
+  offers?: Array<SCThingThatCanBeOfferedOffer<T>>;
+}
+
 /**
  * Offer of a thing
  */
-export interface SCThingThatCanBeOfferedOffer<T extends SCPriceGroup> {
+export interface SCThingThatCanBeOfferedOffer<T extends SCPriceGroup>
+  extends SCInPlace {
   /**
    * Availability of an offer
    */
@@ -82,15 +90,10 @@ export interface SCThingThatCanBeOfferedOffer<T extends SCPriceGroup> {
    */
   availabilityStarts?: SCISO8601Date;
 
-  /**
-   * Default price of the thing
-   */
-  price: number;
-
   /**
    * List of prices that are distinct for specific groups
    */
-  prices?: T;
+  prices: T;
 
   /**
    * Provider of an offer
@@ -101,7 +104,8 @@ export interface SCThingThatCanBeOfferedOffer<T extends SCPriceGroup> {
 /**
  * Translatable properties of a thing that can be offered
  */
-export interface SCThingThatCanBeOfferedTranslatableProperties extends SCThingTranslatableProperties {
+export interface SCThingThatCanBeOfferedTranslatableProperties
+  extends SCThingTranslatableProperties {
   /**
    * Availability of an offer
    */
@@ -109,20 +113,17 @@ export interface SCThingThatCanBeOfferedTranslatableProperties extends SCThingTr
 }
 
 /**
- * Possible things a provider can be
+ * Entity responsible for the offer
  */
 export type SCThingThatCanBeOfferedProvider =
-  SCBuildingWithoutReferences
   | SCOrganizationWithoutReferences
-  | SCPersonWithoutReferences
-  | SCPointOfInterestWithoutReferences
-  | SCRoomWithoutReferences;
+  | SCPersonWithoutReferences;
 
 /**
  * Availability of an Offer
  */
 export type SCThingThatCanBeOfferedAvailability =
-  'in stock'
+  | 'in stock'
   | 'out of stock'
   | 'online only'
   | 'limited availability';

src/core/base/ThingWithCategories.ts

@@ -12,8 +12,8 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThing, SCThingTranslatableProperties} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCThing, SCThingMeta, SCThingTranslatableProperties} from '../Thing';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 import {SCMap} from '../types/Map';
 
 /**
@@ -84,3 +84,46 @@ export interface SCThingWithCategoriesSpecificValues {
    */
   url?: string;
 }
+
+/**
+ * Meta information about a thing without references that accepts payments
+ */
+export class SCThingWithCategoriesWithoutReferencesMeta<T, U> implements
+             SCMetaTranslations<SCThingWithCategoriesWithoutReferences<T, U>> {
+
+  protected static _instance: SCThingMeta;
+
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+    },
+  };
+
+  /**
+   * Function to retrieve typed singleton instance (including generics)
+   */
+  public static getInstance<T, U>(): SCThingWithCategoriesWithoutReferencesMeta<T, U> {
+    return this._instance || (this._instance = new this<T, U>());
+  }
+
+  protected constructor() {
+  }
+}

src/core/protocol/errors/ErrorResponse.ts

@@ -42,6 +42,7 @@ export abstract class SCError implements SCErrorResponse {
 
   /**
    * Instatiate an SCError
+   *
    * @param name Name of the error
    * @param message Message of the error
    * @param statusCode  HTTP status code to return this error with
@@ -66,6 +67,7 @@ export class SCValidationErrorResponse extends SCError {
 
   /**
    * Create a SCValidationErrorResponse
+   *
    * @param errors List of validation errors
    * @param stack Set to true if a stack trace should be created
    */
@@ -81,6 +83,7 @@ export class SCValidationErrorResponse extends SCError {
 export class SCUnsupportedMediaTypeErrorResponse extends SCError {
   /**
    * Create a SCUnsupportedMediaTypeErrorResponse
+   *
    * @param stack Set to true if a stack trace should be created
    */
   constructor(stack?: boolean) {
@@ -94,6 +97,7 @@ export class SCUnsupportedMediaTypeErrorResponse extends SCError {
 export class SCMethodNotAllowedErrorResponse extends SCError {
   /**
    * Create a SCMethodNotAllowedErrorResponse
+   *
    * @param stack Set to true if a stack trace should be created
    */
   constructor(stack?: boolean) {
@@ -101,12 +105,26 @@ export class SCMethodNotAllowedErrorResponse extends SCError {
   }
 }
 
+/**
+ * An error that is returned, when the request body is too large.
+ */
+export class SCRequestBodyTooLargeErrorResponse extends SCError {
+  /**
+   * Create a SCRequestBodyTooLargeErrorResponse
+   * @param stack Set to true if a stack trace should be created
+   */
+  constructor(stack?: boolean) {
+    super('RequestBodyTooLargeError', 'The request body is too large.', 413, stack);
+  }
+}
+
 /**
  * An error that is returned, when to many request are submitted at once
  */
 export class SCTooManyRequestsErrorResponse extends SCError {
   /**
    * Create a SCTooManyRequestsErrorResponse
+   *
    * @param stack Set to true if a stack trace should be created
    */
   constructor(stack?: boolean) {
@@ -120,6 +138,7 @@ export class SCTooManyRequestsErrorResponse extends SCError {
 export class SCNotFoundErrorResponse extends SCError {
   /**
    * Create a SCNotFoundErrorResponse
+   *
    * @param stack Set to true if a stack trace should be created
    */
   constructor(stack?: boolean) {
@@ -127,12 +146,80 @@ export class SCNotFoundErrorResponse extends SCError {
   }
 }
 
+/**
+ * An error that is returned when the request is in the right format, but contains parameters that are invalid or not
+ * acceptable.
+ */
+export class SCParametersNotAcceptable extends SCError {
+  /**
+   * Create a ParametersNotAcceptable
+   *
+   * @param message contains more details to what you did wrong
+   * @param stack Set to true if a stack trace should be created
+   */
+  constructor(message: string, stack?: boolean) {
+    super('ParametersNotAcceptable', message, 406, stack);
+  }
+}
+
+/**
+ * An error that is returned when a plugin with the same name is already registered, to prevent two copies of a plugin
+ * running at the same time.
+ * This usually indicates that there is more than one instance a plugin running.
+ */
+export class SCPluginAlreadyRegisteredErrorResponse extends SCError {
+  /**
+   * Create a PluginAlreadyRegisteredError
+   *
+   * @param message contains potential differences in other parameters outside of the name
+   * @param stack Set to true if a stack trace should be created
+   */
+  constructor(message: string, stack?: boolean) {
+    super('PluginRegisteringFailedError', message, 409, stack);
+  }
+}
+
+/**
+ * An error that is returned whenever there is an unexpected error while creating a plugin
+ */
+export class SCPluginRegisteringFailedErrorResponse extends SCError {
+  /**
+   * Create a PluginRegisteringFailedError
+   *
+   * @param message Describes what went wrong wile registering the plugin
+   * @param stack Set to true if a stack trace should be created
+   */
+  constructor(message: string, stack?: boolean) {
+    super('PluginRegisteringFailedError', message, 500, stack);
+  }
+}
+
+/**
+ * An error that is returned whenever there is a plugin request that is supposed to register a route, that is already
+ * registered
+ * This usually indicates that two **different** plugins use the same route.
+ */
+export class SCPluginRouteAlreadyRegisteredErrorResponse extends SCError {
+  /**
+   * Create a PluginRouteAlreadyRegisteredError
+   *
+   * @param registeredName The name by the plugin that has already registered the route previously
+   * @param registeredUrl  The URL by the plugin that has already registered the route previously
+   * @param stack Set to true if a stack trace should be created
+   */
+  constructor(registeredName: string, registeredUrl: string, stack?: boolean) {
+    super('PluginRouteAlreadyRegisteredError',
+      `Already registered by "${registeredName}" under URL "${registeredUrl}".`, 409, stack);
+  }
+}
+
 /**
  * An error that is returned whenever there is a syntax error
  */
 export class SCSyntaxErrorResponse extends SCError {
   /**
    * Create a SyntaxError
+   *
    * @param message Describes the syntax error
    * @param stack Set to true if a stack trace should be created
    */
@@ -152,6 +239,7 @@ export class SCInternalServerErrorResponse extends SCError {
 
   /**
    * Create a SCInternalServerErrorResponse
+   *
    * @param err Internal server error
    * @param stack Set to true if a stack trace should be created 
    * and the internal server error should be displayed to the client

src/core/protocol/routes/INDEX/IndexRequest.ts

@@ -16,6 +16,7 @@ import {SCAbstractRoute, SCRouteHttpVerbs} from '../../../Route';
 import {
   SCInternalServerErrorResponse,
   SCMethodNotAllowedErrorResponse,
+  SCRequestBodyTooLargeErrorResponse,
   SCSyntaxErrorResponse,
   SCUnsupportedMediaTypeErrorResponse,
   SCValidationErrorResponse,
@@ -38,6 +39,7 @@ export class SCIndexRoute extends SCAbstractRoute {
     this.errorNames = [
       SCInternalServerErrorResponse,
       SCMethodNotAllowedErrorResponse,
+      SCRequestBodyTooLargeErrorResponse,
       SCSyntaxErrorResponse,
       SCUnsupportedMediaTypeErrorResponse,
       SCValidationErrorResponse,

src/core/protocol/routes/TYPE/UID/ThingUpdateRequest.ts

@@ -17,7 +17,9 @@ import {SCAbstractRoute, SCRouteHttpVerbs} from '../../../../Route';
 import {
   SCInternalServerErrorResponse,
   SCMethodNotAllowedErrorResponse,
-  SCNotFoundErrorResponse, SCSyntaxErrorResponse,
+  SCNotFoundErrorResponse,
+  SCRequestBodyTooLargeErrorResponse,
+  SCSyntaxErrorResponse,
   SCUnsupportedMediaTypeErrorResponse,
   SCValidationErrorResponse,
 } from '../../../errors/ErrorResponse';
@@ -39,6 +41,7 @@ export class SCThingUpdateRoute extends SCAbstractRoute {
       SCInternalServerErrorResponse,
       SCMethodNotAllowedErrorResponse,
       SCNotFoundErrorResponse,
+      SCRequestBodyTooLargeErrorResponse,
       SCSyntaxErrorResponse,
       SCUnsupportedMediaTypeErrorResponse,
       SCValidationErrorResponse,

src/core/protocol/routes/bookAvailability/BookAvailabilityRequest.ts

@@ -18,6 +18,7 @@ import {
   SCInternalServerErrorResponse,
   SCMethodNotAllowedErrorResponse,
   SCNotFoundErrorResponse,
+  SCRequestBodyTooLargeErrorResponse,
   SCSyntaxErrorResponse,
   SCUnsupportedMediaTypeErrorResponse,
   SCValidationErrorResponse,
@@ -71,6 +72,7 @@ export class SCBookAvailabilityRoute extends SCAbstractRoute {
       SCInternalServerErrorResponse,
       SCMethodNotAllowedErrorResponse,
       SCNotFoundErrorResponse,
+      SCRequestBodyTooLargeErrorResponse,
       SCSyntaxErrorResponse,
       SCUnsupportedMediaTypeErrorResponse,
       SCValidationErrorResponse,

src/core/protocol/routes/bulk/BulkRequest.ts

@@ -18,6 +18,7 @@ import {SCISO8601Date} from '../../../types/Time';
 import {
   SCInternalServerErrorResponse,
   SCMethodNotAllowedErrorResponse,
+  SCRequestBodyTooLargeErrorResponse,
   SCSyntaxErrorResponse,
   SCUnsupportedMediaTypeErrorResponse,
   SCValidationErrorResponse,
@@ -69,6 +70,7 @@ export class SCBulkRoute extends SCAbstractRoute {
     this.errorNames = [
       SCInternalServerErrorResponse,
       SCMethodNotAllowedErrorResponse,
+      SCRequestBodyTooLargeErrorResponse,
       SCSyntaxErrorResponse,
       SCUnsupportedMediaTypeErrorResponse,
       SCValidationErrorResponse,

src/core/protocol/routes/bulk/UID/BulkAddRequest.ts

@@ -18,6 +18,7 @@ import {
   SCInternalServerErrorResponse,
   SCMethodNotAllowedErrorResponse,
   SCNotFoundErrorResponse,
+  SCRequestBodyTooLargeErrorResponse,
   SCSyntaxErrorResponse,
   SCUnsupportedMediaTypeErrorResponse,
   SCValidationErrorResponse,
@@ -39,6 +40,7 @@ export class SCBulkAddRoute extends SCAbstractRoute {
       SCInternalServerErrorResponse,
       SCMethodNotAllowedErrorResponse,
       SCNotFoundErrorResponse,
+      SCRequestBodyTooLargeErrorResponse,
       SCSyntaxErrorResponse,
       SCUnsupportedMediaTypeErrorResponse,
       SCValidationErrorResponse,

src/core/protocol/routes/bulk/UID/BulkDoneRequest.ts

@@ -17,6 +17,7 @@ import {
   SCInternalServerErrorResponse,
   SCMethodNotAllowedErrorResponse,
   SCNotFoundErrorResponse,
+  SCRequestBodyTooLargeErrorResponse,
   SCSyntaxErrorResponse,
   SCUnsupportedMediaTypeErrorResponse,
   SCValidationErrorResponse,
@@ -39,6 +40,7 @@ export class SCBulkDoneRoute extends SCAbstractRoute {
       SCInternalServerErrorResponse,
       SCMethodNotAllowedErrorResponse,
       SCNotFoundErrorResponse,
+      SCRequestBodyTooLargeErrorResponse,
       SCSyntaxErrorResponse,
       SCUnsupportedMediaTypeErrorResponse,
       SCValidationErrorResponse,

src/core/protocol/routes/feedback/FeedbackRequest.ts

@@ -17,6 +17,7 @@ import {SCMessage} from '../../../things/Message';
 import {
   SCInternalServerErrorResponse,
   SCMethodNotAllowedErrorResponse,
+  SCRequestBodyTooLargeErrorResponse,
   SCSyntaxErrorResponse,
   SCUnsupportedMediaTypeErrorResponse,
   SCValidationErrorResponse,
@@ -43,6 +44,7 @@ export class SCFeedbackRoute extends SCAbstractRoute {
     this.errorNames = [
       SCInternalServerErrorResponse,
       SCMethodNotAllowedErrorResponse,
+      SCRequestBodyTooLargeErrorResponse,
       SCSyntaxErrorResponse,
       SCUnsupportedMediaTypeErrorResponse,
       SCValidationErrorResponse,

src/core/protocol/routes/plugin/PluginRegisterRequest.ts

@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {Schema} from 'jsonschema';
+import {SCAbstractRoute, SCRouteHttpVerbs} from '../../../Route';
+import {
+  SCInternalServerErrorResponse,
+  SCMethodNotAllowedErrorResponse, SCParametersNotAcceptable,
+  SCPluginAlreadyRegisteredErrorResponse,
+  SCPluginRegisteringFailedErrorResponse,
+  SCPluginRouteAlreadyRegisteredErrorResponse,
+  SCRequestBodyTooLargeErrorResponse,
+  SCSyntaxErrorResponse,
+} from '../../errors/ErrorResponse';
+
+/**
+ * Plugin register request
+ *
+ * @validatable
+ */
+export type SCPluginRegisterRequest = AddPlugin | RemovePlugin;
+interface AddPlugin {
+  /**
+   * The desired action, so whether the plugin should be added or removed
+   */
+  action: 'add';
+
+  /**
+   * The address of the plugin
+   */
+  address: string;
+
+  /**
+   * The name of the plugin
+   * Just for debugging purposes, to more easily identify conflicts.
+   */
+  name: string;
+
+  /**
+   * How the requests of the plugin looks like, a JSON schema for validation
+   */
+  pluginRequestSchema: Schema;
+
+  /**
+   * How the responses of the plugin looks like, a JSON schema for validation
+   */
+  pluginResponseSchema: Schema;
+
+  /**
+   * The desired route, for example /feedback.
+   */
+  route: string;
+}
+interface RemovePlugin {
+  /**
+   * The desired action, so whether the plugin should be added or removed
+   */
+  action: 'remove';
+
+  /**
+   * The route of the plugin you want to remove
+   */
+  route: string;
+}
+
+/**
+ * Route to register plugins
+ */
+export class SCPluginRegisterRoute extends SCAbstractRoute {
+  constructor() {
+    super();
+    this.errorNames = [
+      SCInternalServerErrorResponse,
+      SCMethodNotAllowedErrorResponse,
+      SCParametersNotAcceptable,
+      SCPluginAlreadyRegisteredErrorResponse,
+      SCPluginRouteAlreadyRegisteredErrorResponse,
+      SCPluginRegisteringFailedErrorResponse,
+      SCPluginRouteAlreadyRegisteredErrorResponse,
+      SCRequestBodyTooLargeErrorResponse,
+      SCSyntaxErrorResponse,
+    ];
+    this.method = SCRouteHttpVerbs.POST;
+    this.requestBodyName = 'SCPluginRegisterRequest';
+    this.responseBodyName = 'SCPluginRegisterResponse';
+    this.statusCodeSuccess = 200;
+    this.urlFragment = '/plugin/register';
+  }
+}

src/core/protocol/routes/plugin/PluginRegisterResponse.ts

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Plugin register response
+ *
+ * @validatable
+ */
+export interface SCPluginRegisterResponse {
+  /**
+   * Whether the desired action succeeded or failed (true for success, false if an error occurred)
+   */
+  success: boolean;
+}

src/core/protocol/routes/search/MultiSearchRequest.ts

@@ -13,9 +13,11 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {SCAbstractRoute, SCRouteHttpVerbs} from '../../../Route';
+import {SCMap} from '../../../types/Map';
 import {
   SCInternalServerErrorResponse,
   SCMethodNotAllowedErrorResponse,
+  SCRequestBodyTooLargeErrorResponse,
   SCSyntaxErrorResponse,
   SCTooManyRequestsErrorResponse,
   SCUnsupportedMediaTypeErrorResponse,
@@ -32,9 +34,7 @@ import {SCSearchQuery} from './SearchRequest';
  *
  * @validatable
  */
-export interface SCMultiSearchRequest {
-  [k: string]: SCSearchQuery;
-}
+export type SCMultiSearchRequest = SCMap<SCSearchQuery>;
 
 /**
  * Route for submission of multiple search requests at once
@@ -45,6 +45,7 @@ export class SCMultiSearchRoute extends SCAbstractRoute {
     this.errorNames = [
       SCInternalServerErrorResponse,
       SCMethodNotAllowedErrorResponse,
+      SCRequestBodyTooLargeErrorResponse,
       SCSyntaxErrorResponse,
       SCTooManyRequestsErrorResponse,
       SCUnsupportedMediaTypeErrorResponse,

src/core/protocol/routes/search/MultiSearchResponse.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018-2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -12,6 +12,7 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
+import {SCMap} from '../../../types/Map';
 import {SCSearchResult} from './SearchResponse';
 
 /**
@@ -21,6 +22,4 @@ import {SCSearchResult} from './SearchResponse';
  *
  * @validatable
  */
-export interface SCMultiSearchResponse {
-  [k: string]: SCSearchResult;
-}
+export type SCMultiSearchResponse = SCMap<SCSearchResult>;

src/core/protocol/routes/search/SearchRequest.ts

@@ -13,11 +13,13 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {SCAbstractRoute, SCRouteHttpVerbs} from '../../../Route';
+import {SCSearchContext} from '../../../types/config/Backend';
 import {SCSearchFilter} from '../../../types/filters/Abstract';
 import {SCSearchSort} from '../../../types/sorts/Abstract';
 import {
   SCInternalServerErrorResponse,
   SCMethodNotAllowedErrorResponse,
+  SCRequestBodyTooLargeErrorResponse,
   SCSyntaxErrorResponse,
   SCUnsupportedMediaTypeErrorResponse,
   SCValidationErrorResponse,
@@ -36,7 +38,12 @@ export interface SCSearchRequest extends SCSearchQuery {
  */
 export interface SCSearchQuery {
   /**
-   *  A filter structure that combines any number of filters with boolean methods ('AND', 'OR', 'NOT')
+   * The context name from where the search query was initiated
+   */
+  context?: SCSearchContext;
+
+  /**
+   * A filter structure that combines any number of filters with boolean methods ('AND', 'OR', 'NOT')
    */
   filter?: SCSearchFilter;
 
@@ -70,6 +77,7 @@ export class SCSearchRoute extends SCAbstractRoute {
     this.errorNames = [
       SCInternalServerErrorResponse,
       SCMethodNotAllowedErrorResponse,
+      SCRequestBodyTooLargeErrorResponse,
       SCSyntaxErrorResponse,
       SCUnsupportedMediaTypeErrorResponse,
       SCValidationErrorResponse,

src/core/protocol/routes/search/SearchResponse.ts

@@ -13,7 +13,6 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {SCThings, SCThingsField} from '../../../Classes';
-import {SCMap} from '../../../types/Map';
 
 /**
  * A search response
@@ -53,9 +52,9 @@ export interface SCSearchResult {
  */
 export interface SCFacet {
   /**
-   * Values for the aggregation
+   * Buckets for the aggregation
    */
-  buckets: Array<SCMap<number>>;
+  buckets: SCFacetBucket[];
 
   /**
    * Field of the aggregation
@@ -63,6 +62,21 @@ export interface SCFacet {
   field: SCThingsField;
 }
 
+/**
+ * A bucket of a facet
+ */
+export interface SCFacetBucket {
+  /**
+   * Count of matching search results
+   */
+  count: number;
+
+  /**
+   * Key of a bucket
+   */
+  key: string;
+}
+
 /**
  * Stores information about Pagination
  */

src/core/things/AcademicEvent.ts

@@ -12,14 +12,15 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCEvent, SCEventWithoutReferences} from '../base/Event';
+import {SCEvent, SCEventMeta, SCEventWithoutReferences} from '../base/Event';
 import {
   SCThingWithCategoriesSpecificValues,
   SCThingWithCategoriesTranslatableProperties,
   SCThingWithCategoriesWithoutReferences,
+  SCThingWithCategoriesWithoutReferencesMeta,
 } from '../base/ThingWithCategories';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 
 /**
  * An academic event without references
@@ -66,18 +67,6 @@ export interface SCAcademicEvent extends SCEvent, SCAcademicEventWithoutReferenc
   type: SCThingType.AcademicEvent;
 }
 
-/**
- * Event meta data
- */
-export class SCAcademicEventMeta extends SCThingMeta {
-  static fieldValueTranslations = {
-    ...SCThingMeta.fieldValueTranslations,
-    de: {
-      type: 'Event',
-    },
-  };
-}
-
 /**
  * Categories of academic events
  */
@@ -111,3 +100,42 @@ export interface SCAcademicEventTranslatableProperties
    */
   originalCategory?: string;
 }
+
+/**
+ * Meta information about academic events
+ */
+export class SCAcademicEventMeta extends SCThingMeta implements SCMetaTranslations<SCAcademicEvent> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCEventMeta.getInstance().fieldTranslations.de,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCAcademicEventCategories,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.de,
+    },
+    en: {
+      ... SCEventMeta.getInstance().fieldTranslations.en,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCAcademicEventCategories,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCEventMeta.getInstance().fieldValueTranslations.de,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCAcademicEventCategories,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.de,
+      type: 'akademische Veranstaltung',
+    },
+    en: {
+      ... SCEventMeta.getInstance().fieldValueTranslations.en,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCAcademicEventCategories,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.en,
+      type: SCThingType.AcademicEvent,
+    },
+  };
+}

src/core/things/Article.ts

@@ -14,6 +14,7 @@
  */
 import {
   SCCreativeWork,
+  SCCreativeWorkMeta,
   SCCreativeWorkTranslatableProperties,
   SCCreativeWorkWithoutReferences,
 } from '../base/CreativeWork';
@@ -21,9 +22,10 @@ import {
   SCThingWithCategoriesSpecificValues,
   SCThingWithCategoriesTranslatableProperties,
   SCThingWithCategoriesWithoutReferences,
+  SCThingWithCategoriesWithoutReferencesMeta,
 } from '../base/ThingWithCategories';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 
 /**
  * An article without references
@@ -65,19 +67,6 @@ export interface SCArticle extends SCCreativeWork, SCArticleWithoutReferences {
   type: SCThingType.Article;
 }
 
-/**
- * Meta information about an article
- */
-export class SCArticleMeta extends SCThingMeta {
-  static fieldTranslations = {
-    ...SCThingMeta.fieldTranslations,
-    de: {
-      articleBody: 'Artikeltext',
-      categories: 'Kategorien',
-    },
-  };
-}
-
 /**
  * Categories of articles
  */
@@ -93,3 +82,42 @@ export interface SCArticleTranslatableProperties
    */
   articleBody?: string[];
 }
+
+/**
+ * Meta information about an article
+ */
+export class SCArticleMeta extends SCThingMeta implements SCMetaTranslations<SCArticle> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCCreativeWorkMeta.getInstance().fieldTranslations.de,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCArticleCategories,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.de,
+    },
+    en: {
+      ... SCCreativeWorkMeta.getInstance().fieldTranslations.en,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCArticleCategories,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCCreativeWorkMeta.getInstance().fieldValueTranslations.de,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCArticleCategories,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.de,
+      type: 'Artikel',
+    },
+    en: {
+      ... SCCreativeWorkMeta.getInstance().fieldValueTranslations.en,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCArticleCategories,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.en,
+      type: SCThingType.Article,
+    },
+  };
+}

src/core/things/Book.ts

@@ -14,12 +14,13 @@
  */
 import {
   SCCreativeWork,
+  SCCreativeWorkMeta,
   SCCreativeWorkTranslatableProperties,
   SCCreativeWorkWithoutReferences,
 } from '../base/CreativeWork';
 import {SCThingWithCategoriesTranslatableProperties} from '../base/ThingWithCategories';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 import {SCPersonWithoutReferences} from './Person';
 
 /**
@@ -74,20 +75,6 @@ export interface SCBook extends SCCreativeWork, SCBookWithoutReferences {
   type: SCThingType.Book;
 }
 
-/**
- * Meta information about a book
- */
-export class SCBookMeta extends SCThingMeta {
-  static fieldTranslations = {
-    ...SCThingMeta.fieldTranslations,
-    de: {
-      bookEdition: 'Edition',
-      isbn: 'ISBN',
-      numberOfPages: 'Seitenanzahl',
-    },
-  };
-}
-
 /**
  * Translatable properties of a book
  */
@@ -98,3 +85,34 @@ export interface SCBookTranslatableFields
    */
   bookEdition?: string;
 }
+
+/**
+ * Meta information about a book
+ */
+export class SCBookMeta extends SCThingMeta implements SCMetaTranslations<SCBook> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCCreativeWorkMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCCreativeWorkMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCCreativeWorkMeta.getInstance().fieldValueTranslations.de,
+      type: 'Buch',
+    },
+    en: {
+      ... SCCreativeWorkMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Book,
+    },
+  };
+}

src/core/things/Building.ts

@@ -12,14 +12,19 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCPlaceWithoutReferences} from '../base/Place';
+import {
+  SCPlaceWithoutReferences,
+  SCPlaceWithoutReferencesMeta,
+  SCPlaceWithoutReferencesTranslatableProperties,
+} from '../base/Place';
 import {
   SCThingWithCategoriesSpecificValues,
   SCThingWithCategoriesTranslatableProperties,
   SCThingWithCategoriesWithoutReferences,
+  SCThingWithCategoriesWithoutReferencesMeta,
 } from '../base/ThingWithCategories';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 
 export type SCBuildingCategories =
   'cafe'
@@ -48,7 +53,7 @@ export interface SCBuildingWithoutReferences
   /**
    * Translated fields of a building
    */
-  translations?: SCTranslations<SCThingWithCategoriesTranslatableProperties>;
+  translations?: SCTranslations<SCBuildingTranslatableProperties>;
 
   /**
    * Type of the building
@@ -62,19 +67,51 @@ export interface SCBuildingWithoutReferences
  * @validatable
  */
 export interface SCBuilding extends SCBuildingWithoutReferences {
+  /**
+   * Translated fields of a building
+   */
+  translations?: SCTranslations<SCBuildingTranslatableProperties>;
+
   /**
    * Type of the building
    */
   type: SCThingType.Building;
 }
 
-/**
- * Meta information about a place
- */
-export class SCBuildingMeta extends SCThingMeta {
-  static fieldValueTranslations = {
-    ...SCThingMeta.fieldValueTranslations,
+export interface SCBuildingTranslatableProperties
+       extends SCPlaceWithoutReferencesTranslatableProperties, SCThingWithCategoriesTranslatableProperties {
+  floors?: string[];
+}
+
+  /**
+   * Meta information about a place
+   */
+export class SCBuildingMeta extends SCThingMeta implements SCMetaTranslations<SCBuilding> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
     de: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCBuildingCategories,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.de,
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldTranslations.de,
+      floors: 'Etagen',
+    },
+    en: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCBuildingCategories,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.en,
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCBuildingCategories,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.de,
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldValueTranslations.de,
       categories: {
         'cafe': 'Café',
         'canteen': 'Kantine',
@@ -85,6 +122,13 @@ export class SCBuildingMeta extends SCThingMeta {
         'restroom': 'Toilette',
         'student canteen': 'Mensa',
       },
+      type: 'Gebäude',
+    },
+    en: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCBuildingCategories,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.en,
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Building,
     },
   };
 }

src/core/things/Catalog.ts

@@ -13,8 +13,13 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {SCAcademicTermWithoutReferences} from '../base/AcademicTerm';
-import {SCThingWithCategoriesSpecificValues, SCThingWithCategoriesWithoutReferences} from '../base/ThingWithCategories';
+import {
+  SCThingWithCategoriesSpecificValues,
+  SCThingWithCategoriesWithoutReferences,
+  SCThingWithCategoriesWithoutReferencesMeta,
+} from '../base/ThingWithCategories';
 import {SCThingMeta, SCThingType} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
 
 /**
  * A catalog without references
@@ -62,10 +67,39 @@ export interface SCCatalog extends SCCatalogWithoutReferences {
   type: SCThingType.Catalog;
 }
 
-/**
- * Catalog meta data
- */
-export class SCCatalogMeta extends SCThingMeta {
+  /**
+   * Catalog meta data
+   */
+export class SCCatalogMeta extends SCThingMeta implements SCMetaTranslations<SCCatalog> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCCatalogCategories,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCCatalogCategories,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCCatalogCategories,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.de,
+      type: 'Verzeichnis',
+    },
+    en: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCCatalogCategories,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.en,
+      type: SCThingType.Catalog,
+    },
+  };
 }
 
 /**

src/core/things/CourseOfStudies.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018, 2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -12,21 +12,23 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCAcademicDegree} from '../base/AcademicDegree';
-import {SCAcademicPriceGroup,
-        SCThingThatCanBeOffered,
-        SCThingThatCanBeOfferedTranslatableProperties} from '../base/ThingThatCanBeOffered';
+import {SCAcademicDegree, SCAcademicDegreeMeta} from '../base/AcademicDegree';
+import {
+  SCAcademicPriceGroup,
+  SCThingThatCanBeOffered,
+  SCThingThatCanBeOfferedTranslatableProperties,
+  SCThingThatCanBeOfferedWithoutReferences,
+} from '../base/ThingThatCanBeOffered';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCLanguage, SCTranslations} from '../types/i18n';
+import {SCLanguage, SCMetaTranslations, SCTranslations} from '../types/i18n';
 import {SCDateSeriesWithoutReferences} from './DateSeries';
 import {SCOrganization} from './Organization';
 
 /**
  * A course of studies without references
  */
-export interface SCCourseOfStudiesWithoutReferences extends
-                 SCAcademicDegree,
-                 SCThingThatCanBeOffered<SCAcademicPriceGroup> {
+export interface SCCourseOfStudiesWithoutReferences extends SCAcademicDegree,
+  SCThingThatCanBeOfferedWithoutReferences {
   /**
    * The main language in which the course of studies
    * is beeing offered
@@ -64,14 +66,15 @@ export interface SCCourseOfStudiesWithoutReferences extends
  *
  * @validatable
  */
-export interface SCCourseOfStudies extends SCCourseOfStudiesWithoutReferences {
+export interface SCCourseOfStudies extends SCCourseOfStudiesWithoutReferences,
+  SCThingThatCanBeOffered<SCAcademicPriceGroup> {
   /**
    * The department that manages the course of studies
    */
   department: SCOrganization;
 
   /**
-   * The secretary that administers requests and 
+   * The secretary that administers requests and
    * questions concerning the course of studies
    */
   secretary: SCOrganization;
@@ -81,6 +84,11 @@ export interface SCCourseOfStudies extends SCCourseOfStudiesWithoutReferences {
    */
   startDates?: SCDateSeriesWithoutReferences[];
 
+  /**
+   * Translated fields of a dish
+   */
+  translations?: SCTranslations<SCCourseOfStudiesTranslatableProperties>;
+
   /**
    * Type of the course of studies
    */
@@ -88,26 +96,31 @@ export interface SCCourseOfStudies extends SCCourseOfStudiesWithoutReferences {
 }
 
 export interface SCCourseOfStudiesTranslatableProperties
-       extends SCThingThatCanBeOfferedTranslatableProperties {
+  extends SCThingThatCanBeOfferedTranslatableProperties {
 }
 
 /**
- * course of studies meta data
+ * Meta information about a course of studies
  */
-export class SCCourseOfStudiesMeta extends SCThingMeta {
-  static fieldTranslations = {
-    ...SCThingMeta.fieldTranslations,
+export class SCCourseOfStudiesMeta extends SCThingMeta implements SCMetaTranslations<SCCourseOfStudies> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
     de: {
-      academicDegree: 'Hochschulabschluss',
-      department: 'Fachbereich',
-      major: 'Studienfach',
-      modes: 'Studiengangsarten',
-      secretary: 'Sekretariat',
+      ...SCAcademicDegreeMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ...SCAcademicDegreeMeta.getInstance().fieldTranslations.en,
     },
   };
-  static fieldValueTranslations = {
-    ...SCThingMeta.fieldValueTranslations,
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations = {
     de: {
+      ...SCAcademicDegreeMeta.getInstance().fieldValueTranslations.de,
       modes: {
         combination: 'Kombinationsstudiengang',
         dual: 'Dualer Studiengang',
@@ -116,19 +129,28 @@ export class SCCourseOfStudiesMeta extends SCThingMeta {
       },
       type: 'Studiengang',
     },
+    en: {
+      ...SCAcademicDegreeMeta.getInstance().fieldValueTranslations.en,
+      academicDegree: 'Hochschulabschluss',
+      department: 'Fachbereich',
+      major: 'Studienfach',
+      modes: 'Studiengangsarten',
+      secretary: 'Sekretariat',
+      type: SCThingType.CourseOfStudies,
+    },
   };
 }
 
 /**
  * Types of (german) course of studies modes
  */
-export type SCCourseOfStudiesMode = 'combination' |
-                                    'dual' |
-                                    'double-degree' |
-                                    'standard' ;
+export type SCCourseOfStudiesMode = 'combination'
+  | 'dual'
+  | 'double-degree'
+  | 'standard' ;
 
 /**
  * Types of (german) course of studies time modes
  */
-export type SCCourseOfStudiesTimeMode = 'fulltime' |
-                                        'parttime' ;
+export type SCCourseOfStudiesTimeMode = 'fulltime'
+  | 'parttime' ;

src/core/things/DateSeries.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018, 2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -12,14 +12,15 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThingInPlace} from '../base/ThingInPlace';
+import {SCThingInPlace, SCThingInPlaceMeta} from '../base/ThingInPlace';
 import {
   SCAcademicPriceGroup,
   SCThingThatCanBeOffered,
   SCThingThatCanBeOfferedTranslatableProperties,
+  SCThingThatCanBeOfferedWithoutReferences,
 } from '../base/ThingThatCanBeOffered';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 import {SCISO8601Date, SCISO8601Duration} from '../types/Time';
 import {SCAcademicEventWithoutReferences} from './AcademicEvent';
 import {SCPersonWithoutReferences} from './Person';
@@ -32,14 +33,13 @@ export interface SCSportCoursePriceGroup extends SCAcademicPriceGroup {
   /**
    * Price for alumnis
    */
-  alumni: number;
+  alumni?: number;
 }
 
 /**
  * A date without references
  */
-export interface SCDateSeriesWithoutReferences
-  extends SCThingThatCanBeOffered<SCSportCoursePriceGroup> {
+export interface SCDateSeriesWithoutReferences extends SCThingThatCanBeOfferedWithoutReferences {
   /**
    * Dates of the date series that are initially planned to be held
    */
@@ -76,7 +76,9 @@ export interface SCDateSeriesWithoutReferences
  *
  * @validatable
  */
-export interface SCDateSeries extends SCDateSeriesWithoutReferences, SCThingInPlace {
+export interface SCDateSeries extends SCDateSeriesWithoutReferences,
+  SCThingInPlace,
+  SCThingThatCanBeOffered<SCSportCoursePriceGroup> {
   /**
    * Event to which the date series belongs
    */
@@ -100,15 +102,35 @@ export interface SCDateSeries extends SCDateSeriesWithoutReferences, SCThingInPl
 }
 
 /**
- * Date series meta data
+ * Meta information about a date series
  */
-export class SCDateSeriesMeta extends SCThingMeta {
-  static fieldTranslations = {
-    ...SCThingMeta.fieldTranslations,
+export class SCDateSeriesMeta extends SCThingMeta implements SCMetaTranslations<SCDateSeries> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
     de: {
+      ...SCThingInPlaceMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ...SCThingInPlaceMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations = {
+    de: {
+      ...SCThingInPlaceMeta.getInstance().fieldValueTranslations.de,
       dates: 'Einzeltermine',
       duration: 'Dauer',
       frequency: 'Wiederholung',
+      type: 'Wiederholungreihe',
+    },
+    en: {
+      ...SCThingInPlaceMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.DateSeries,
     },
   };
 }

src/core/things/Diff.ts

@@ -15,6 +15,7 @@
 import * as jsonpatch from 'json-patch';
 import {SCThingsWithoutDiff} from '../Classes';
 import {SCThing, SCThingMeta, SCThingType} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
 import {SCISO8601Date} from '../types/Time';
 
 /**
@@ -60,15 +61,35 @@ export interface SCDiff extends SCDiffWithoutReferences {
 }
 
 /**
- * Diff meta data
+ * Meta information about a diff
  */
-export class SCDiffMeta extends SCThingMeta {
-  static fieldTranslations = {
-    ...SCThingMeta.fieldTranslations,
+export class SCDiffMeta extends SCThingMeta implements SCMetaTranslations<SCDiff> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
     de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
       action: 'Aktion',
       changes: 'Änderungen',
       dateCreated: 'Erstellungsdatum',
     },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+      type: 'Unterschied',
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Diff,
+    },
   };
 }

src/core/things/Dish.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018, 2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -12,27 +12,26 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThingInPlace} from '../base/ThingInPlace';
 import {
   SCAcademicPriceGroup,
   SCThingThatCanBeOffered,
   SCThingThatCanBeOfferedTranslatableProperties,
+  SCThingThatCanBeOfferedWithoutReferences,
 } from '../base/ThingThatCanBeOffered';
 import {
   SCThingWithCategoriesSpecificValues,
   SCThingWithCategoriesTranslatableProperties,
   SCThingWithCategoriesWithoutReferences,
+  SCThingWithCategoriesWithoutReferencesMeta,
 } from '../base/ThingWithCategories';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 
 /**
  * A dish without references
  */
-export interface SCDishWithoutReferences
-  extends SCThingWithCategoriesWithoutReferences<SCDishCategories,
-      SCThingWithCategoriesSpecificValues>,
-    SCThingThatCanBeOffered<SCAcademicPriceGroup> {
+export interface SCDishWithoutReferences extends SCThingThatCanBeOfferedWithoutReferences,
+  SCThingWithCategoriesWithoutReferences<SCDishCategories, SCThingWithCategoriesSpecificValues> {
   /**
    * Additives of the dish
    */
@@ -69,7 +68,8 @@ export interface SCDishWithoutReferences
  *
  * @validatable
  */
-export interface SCDish extends SCDishWithoutReferences, SCThingInPlace {
+export interface SCDish extends SCDishWithoutReferences,
+  SCThingThatCanBeOffered<SCAcademicPriceGroup> {
   /**
    * Dishes ("Beilagen") that are served with the dish (if only certain supplement dishes can be taken with a dish)
    */
@@ -88,18 +88,10 @@ export interface SCDish extends SCDishWithoutReferences, SCThingInPlace {
 
 export interface SCDishTranslatableProperties
   extends SCThingWithCategoriesTranslatableProperties, SCThingThatCanBeOfferedTranslatableProperties {
-}
-
-/**
- * Dish meta data
- */
-export class SCDishMeta extends SCThingMeta {
-  static fieldTranslations = {
-    ...SCThingMeta.fieldTranslations,
-    de: {
-      categories: 'Kategorien',
-    },
-  };
+  /**
+   * Characteristics of the dish
+   */
+  characteristics?: SCDishCharacteristic[];
 }
 
 /**
@@ -121,7 +113,7 @@ export interface SCDishCharacteristic {
  * A list of categories for dishes
  */
 export type SCDishCategories =
-  'appetizer'
+  | 'appetizer'
   | 'salad'
   | 'main dish'
   | 'dessert'
@@ -169,3 +161,46 @@ export interface SCNutritionInformation {
    */
   sugarContent?: number;
 }
+
+/**
+ * Meta information about a dish
+ */
+export class SCDishMeta extends SCThingMeta implements SCMetaTranslations<SCDish> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ...SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCDishCategories,
+        SCThingWithCategoriesSpecificValues>().fieldTranslations.de,
+    },
+    en: {
+      ...SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCDishCategories,
+        SCThingWithCategoriesSpecificValues>().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations = {
+    de: {
+      ...SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCDishCategories,
+        SCThingWithCategoriesSpecificValues>().fieldValueTranslations.de,
+      categories: {
+        appetizer: 'Vorspeise',
+        dessert: 'Nachtisch',
+        'main dish': 'Hauptgericht',
+        salad: 'Salat',
+        'side dish': 'Beilage',
+        soup: 'Suppe',
+      },
+      type: 'Essen',
+    },
+    en: {
+      ...SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCDishCategories,
+        SCThingWithCategoriesSpecificValues>().fieldValueTranslations.en,
+      type: SCThingType.Dish,
+    },
+  };
+}

src/core/things/Favorite.ts

@@ -12,7 +12,7 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCSaveableThing} from '../base/SaveableThing';
+import {SCSaveableThing, SCSaveableThingWithoutReferences} from '../base/SaveableThing';
 import {SCThingMeta, SCThingType} from '../Thing';
 import {SCAcademicEventWithoutReferences} from './AcademicEvent';
 import {SCArticleWithoutReferences} from './Article';
@@ -37,6 +37,13 @@ export type SCFavoriteDataTypes = SCAcademicEventWithoutReferences
   | SCSportCourseWithoutReferences
   | SCToDoWithoutReferences;
 
+/**
+ * A favorite without references
+ */
+export interface SCFavoriteWithoutReferences extends SCSaveableThingWithoutReferences {
+
+}
+
 /**
  * A favorite
  *

src/core/things/Floor.ts

@@ -13,9 +13,9 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {Feature, FeatureCollection, GeometryObject, LineString} from 'geojson';
-import {SCThingInPlace} from '../base/ThingInPlace';
+import {SCThingInPlace, SCThingInPlaceMeta} from '../base/ThingInPlace';
 import {SCThing, SCThingMeta, SCThingTranslatableProperties, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 import {SCPointOfInterestWithoutReferences} from './PointOfInterest';
 import {SCRoomWithoutReferences} from './Room';
 
@@ -61,12 +61,6 @@ export interface SCFloor extends SCFloorWithoutReferences, SCThingInPlace {
   type: SCThingType.Floor;
 }
 
-/**
- * Meta information about a floor
- */
-export class SCFloorMeta extends SCThingMeta {
-}
-
 /**
  * A feature collection
  */
@@ -98,3 +92,34 @@ export interface SCFloorTranslatableProperties extends SCThingTranslatableProper
    */
   floorName?: string;
 }
+
+/**
+ * Meta information about floors
+ */
+export class SCFloorMeta extends SCThingMeta implements SCMetaTranslations<SCFloor> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingInPlaceMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingInPlaceMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingInPlaceMeta.getInstance().fieldValueTranslations.de,
+      type: 'Etage',
+    },
+    en: {
+      ... SCThingInPlaceMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Floor,
+    },
+  };
+}

src/core/things/Message.ts

@@ -14,12 +14,13 @@
  */
 import {
   SCCreativeWork,
+  SCCreativeWorkMeta,
   SCCreativeWorkTranslatableProperties,
   SCCreativeWorkWithoutReferences,
 } from '../base/CreativeWork';
 import {SCThingThatCanBeOfferedTranslatableProperties} from '../base/ThingThatCanBeOffered';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 import {SCISO8601Date} from '../types/Time';
 
 /**
@@ -69,12 +70,6 @@ export interface SCMessage extends SCCreativeWork, SCMessageWithoutReferences {
   type: SCThingType.Message;
 }
 
-/**
- * Meta information about a message
- */
-export class SCMessageMeta extends SCThingMeta {
-}
-
 /**
  * Audiences for messages
  */
@@ -93,3 +88,34 @@ export interface SCMessageTranslatableProperties
    */
   message?: string;
 }
+
+/**
+ * Meta information about messages
+ */
+export class SCMessageMeta extends SCThingMeta implements SCMetaTranslations<SCMessage> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCCreativeWorkMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCCreativeWorkMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCCreativeWorkMeta.getInstance().fieldValueTranslations.de,
+      type: 'Nachricht',
+    },
+    en: {
+      ... SCCreativeWorkMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Message,
+    },
+  };
+}

src/core/things/Person.ts

@@ -13,7 +13,7 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {SCThing, SCThingMeta, SCThingType} from '../Thing';
-import {SCNationality} from '../types/i18n';
+import {SCMetaTranslations, SCNationality} from '../types/i18n';
 import {SCISO8601Date} from '../types/Time';
 import {SCBuildingWithoutReferences} from './Building';
 import {SCOrganizationWithoutReferences} from './Organization';
@@ -129,7 +129,32 @@ export interface SCPerson extends SCPersonWithoutReferences {
 /**
  * Meta information about a person
  */
-export class SCPersonMeta extends SCThingMeta {
+export class SCPersonMeta extends SCThingMeta implements SCMetaTranslations<SCPerson> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+      type: 'Person',
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Person,
+    },
+  };
 }
 
 /**

src/core/things/PointOfInterest.ts

@@ -12,15 +12,16 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCPlaceWithoutReferences} from '../base/Place';
+import {SCPlaceWithoutReferences, SCPlaceWithoutReferencesMeta} from '../base/Place';
 import {SCThingInPlace} from '../base/ThingInPlace';
 import {
   SCThingWithCategoriesSpecificValues,
   SCThingWithCategoriesTranslatableProperties,
   SCThingWithCategoriesWithoutReferences,
+  SCThingWithCategoriesWithoutReferencesMeta,
 } from '../base/ThingWithCategories';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 
 /**
  * A point of interest without references
@@ -68,7 +69,42 @@ export type SCPointOfInterestCategories =
   | 'disabled access';
 
 /**
- * Meta data of a point of interest
+ * Meta information about points of interest
  */
-export class SCPointOfInterestMeta extends SCThingMeta {
+export class SCPointOfInterestMeta extends SCThingMeta implements SCMetaTranslations<SCPointOfInterest> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      // tslint:disable-next-line:max-line-length
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCPointOfInterestCategories,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.de,
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      // tslint:disable-next-line:max-line-length
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCPointOfInterestCategories,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.en,
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCPointOfInterestCategories,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.de,
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldValueTranslations.de,
+      type: 'Sonderziel',
+    },
+    en: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCPointOfInterestCategories,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.en,
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.PointOfInterest,
+    },
+  };
 }

src/core/things/Room.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018, 2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -12,16 +12,21 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCPlaceWithoutReferences} from '../base/Place';
-import {SCThingInPlace} from '../base/ThingInPlace';
-import {SCThingThatAcceptsPaymentsWithoutReferences} from '../base/ThingThatAcceptsPayments';
+import {SCPlaceWithoutReferences, SCPlaceWithoutReferencesMeta} from '../base/Place';
+import {SCThingInPlace, SCThingInPlaceMeta} from '../base/ThingInPlace';
+import {
+  SCThingThatAcceptsPaymentsWithoutReferences,
+  SCThingThatAcceptsPaymentsWithoutReferencesMeta,
+} from '../base/ThingThatAcceptsPayments';
 import {
   SCThingWithCategoriesSpecificValues,
   SCThingWithCategoriesTranslatableProperties,
   SCThingWithCategoriesWithoutReferences,
+  SCThingWithCategoriesWithoutReferencesMeta,
 } from '../base/ThingWithCategories';
+
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 import {SCMap} from '../types/Map';
 
 /**
@@ -29,15 +34,17 @@ import {SCMap} from '../types/Map';
  */
 export type SCRoomCategories =
   'cafe'
+  | 'canteen'
+  | 'computer'
   | 'education'
+  | 'laboratory'
   | 'learn'
   | 'library'
+  | 'lounge'
   | 'office'
   | 'restaurant'
-  | 'canteen'
-  | 'student canteen'
   | 'restroom'
-  | 'lounge'
+  | 'student canteen'
   | 'student union';
 
 /**
@@ -101,14 +108,43 @@ export interface SCRoomSpecificValues extends SCThingWithCategoriesSpecificValue
 /**
  * Meta information about a place
  */
-export class SCRoomMeta extends SCThingMeta {
-  static fieldValueTranslations = {
-    ...SCThingMeta.fieldValueTranslations,
+export class SCRoomMeta extends SCThingMeta implements SCMetaTranslations<SCRoom> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
     de: {
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldTranslations.de,
+      ... SCThingThatAcceptsPaymentsWithoutReferencesMeta.getInstance().fieldTranslations.de,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCRoomCategories,
+            SCRoomSpecificValues>().fieldTranslations.de,
+      ... SCThingInPlaceMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldTranslations.en,
+      ... SCThingThatAcceptsPaymentsWithoutReferencesMeta.getInstance().fieldTranslations.en,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCRoomCategories,
+            SCRoomSpecificValues>().fieldTranslations.en,
+      ... SCThingInPlaceMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldValueTranslations.de,
+      ... SCThingThatAcceptsPaymentsWithoutReferencesMeta.getInstance().fieldValueTranslations.de,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCRoomCategories,
+                SCRoomSpecificValues>().fieldValueTranslations.de,
+      ... SCThingInPlaceMeta.getInstance().fieldValueTranslations.de,
       categories: {
         'cafe': 'Café',
         'canteen': 'Kantine',
+        'computer': 'PC-Pool',
         'education': 'Bildung',
+        'laboratory': 'Labor',
         'learn': 'Lernen',
         'library': 'Bibliothek',
         'lounge': 'Lounge',
@@ -118,6 +154,15 @@ export class SCRoomMeta extends SCThingMeta {
         'student canteen': 'Mensa',
         'student union': 'Studentenvereinigung',
       },
+      type: 'Raum',
+    },
+    en: {
+      ... SCPlaceWithoutReferencesMeta.getInstance().fieldValueTranslations.en,
+      ... SCThingThatAcceptsPaymentsWithoutReferencesMeta.getInstance().fieldValueTranslations.en,
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCRoomCategories,
+                SCRoomSpecificValues>().fieldValueTranslations.en,
+      ... SCThingInPlaceMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Room,
     },
   };
 }

src/core/things/Semester.ts

@@ -12,8 +12,9 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCAcademicTermWithoutReferences} from '../base/AcademicTerm';
+import {SCAcademicTermWithoutReferences, SCAcademicTermWithoutReferencesMeta} from '../base/AcademicTerm';
 import {SCThingMeta, SCThingType} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
 
 /**
  * A semester without references
@@ -45,17 +46,37 @@ export interface SCSemester extends SCSemesterWithoutReferences {
 }
 
 /**
- * Semester meta data
+ * Meta information about a semester
  */
-export class SCSemesterMeta extends SCThingMeta {
-  static fieldTranslations = {
-    ...SCThingMeta.fieldTranslations,
+export class SCSemesterMeta extends SCThingMeta implements SCMetaTranslations<SCSemester> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
     de: {
+      ... SCAcademicTermWithoutReferencesMeta.getInstance().fieldTranslations.de,
       acronym: 'Abkürzung',
       endDate: 'Ende',
       eventsEndDate: 'Vorlesungsschluss',
       eventsStartDate: 'Vorlesungsbeginn',
       startDate: 'Beginn',
     },
+    en: {
+      ... SCAcademicTermWithoutReferencesMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCAcademicTermWithoutReferencesMeta.getInstance().fieldValueTranslations.de,
+      type: 'Semester',
+    },
+    en: {
+      ... SCAcademicTermWithoutReferencesMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Semester,
+    },
   };
 }

src/core/things/Setting.ts

@@ -16,9 +16,10 @@ import {
   SCThingWithCategoriesSpecificValues,
   SCThingWithCategoriesTranslatableProperties,
   SCThingWithCategoriesWithoutReferences,
+  SCThingWithCategoriesWithoutReferencesMeta,
 } from '../base/ThingWithCategories';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCTranslations} from '../types/i18n';
+import {SCMetaTranslations, SCTranslations} from '../types/i18n';
 
 export type SCSettingCategories = string;
 
@@ -27,11 +28,14 @@ export type SCSettingCategories = string;
  */
 export interface SCSettingWithoutReferences
   extends SCThingWithCategoriesWithoutReferences<SCSettingCategories, SCThingWithCategoriesSpecificValues> {
-
   /**
-   * The type of input/value this setting is carrying
+   * The default value of a setting
    */
-  input: SCSettingInputType;
+  defaultValue: SCSettingValue | SCSettingValues;
+  /**
+   * The input type of this setting
+   */
+  inputType: SCSettingInputType;
   /**
    * The order number this setting should show up in its category list
    */
@@ -44,16 +48,26 @@ export interface SCSettingWithoutReferences
    * The type of this model
    */
   type: SCThingType.Setting;
+  /**
+   * The key of a value of a setting
+   */
+  value?: SCSettingValue | SCSettingValues;
+  /**
+   * The possible values of a setting
+   */
+  values?: SCSettingValues;
 }
 
 /**
  * The types of input/value a setting object can carry
  */
-export type SCSettingInputType = SCSettingSingleChoice
-  | SCSettingMultipleChoice
-  | SCSettingNumber
-  | SCSettingText
-  | SCSettingPassword;
+export enum SCSettingInputType {
+  SingleChoice = 'single choice',
+  MultipleChoice = 'multiple choice',
+  Number = 'number',
+  Text = 'text',
+  Password = 'password',
+}
 
 /**
  * A setting with references
@@ -68,65 +82,73 @@ export interface SCSetting extends SCSettingWithoutReferences {
 }
 
 /**
- * Input type with single choice as value
+ * The type a value of a setting can have
  */
-export interface SCSettingSingleChoice {
-  defaultValue: SCSettingValue;
-  inputType: 'singleChoice';
-  value?: SCSettingValue;
-  values: SCSettingValue[];
-}
-
-/**
- * Input type with multiple choice as value
- */
-export interface SCSettingMultipleChoice {
-  defaultValue: SCSettingValue[];
-  inputType: 'multipleChoice';
-  value?: SCSettingValue[];
-  values: SCSettingValue[];
-}
-
 export type SCSettingValue = string | number | boolean;
 
 /**
- * Input type with number as value
+ * The type of multiple values a setting can have
  */
-export interface SCSettingNumber {
-  defaultValue: number;
-  inputType: 'number';
-  value?: number;
-}
-
-/**
- * Input type with text as value
- */
-export interface SCSettingText {
-  defaultValue: string;
-  inputType: 'text';
-  value?: string;
-}
-
-/**
- * Input type with secret text (eq. password) as value
- */
-export interface SCSettingPassword {
-  defaultValue: string;
-  inputType: 'password';
-  value?: string;
-}
+export type SCSettingValues = SCSettingValue[];
 
 /**
  * Translatable properties of a setting
  */
 export interface SCSettingValueTranslatableProperties extends SCThingWithCategoriesTranslatableProperties {
+  /**
+   * The translations of the possible values of a setting
+   */
+  values?: string[];
 }
 
 /**
- * Meta information about a setting
+ * Meta information about settings
  */
-export class SCSettingMeta extends SCThingMeta {
-  static fieldTranslations = {
-    ...SCThingMeta.fieldTranslations,
+export class SCSettingMeta extends SCThingMeta implements SCMetaTranslations<SCSetting> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      // tslint:disable-next-line:max-line-length
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCSettingCategories,
+                SCThingWithCategoriesSpecificValues>().fieldTranslations.de,
+      defaultValue: 'Standard Wert',
+      inputType: 'Eingabetyp',
+      value: 'Wert',
+      values: 'Werte',
+    },
+    en: {
+      // tslint:disable-next-line:max-line-length
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCSettingCategories,
+                SCThingWithCategoriesSpecificValues>().fieldTranslations.en,
+      defaultValue: 'default value',
+      inputType: 'input type',
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      // tslint:disable-next-line:max-line-length
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCSettingCategories,
+                SCThingWithCategoriesSpecificValues>().fieldValueTranslations.de,
+      inputType: {
+        'multiple choice': 'mehrfach Auswahl',
+        number: 'Zahl',
+        password: 'Passwort',
+        'single choice': 'einfache Auswahl',
+        text: 'Text',
+       },
+      type: 'Einstellung',
+    },
+    en: {
+      // tslint:disable-next-line:max-line-length
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<SCSettingCategories,
+                SCThingWithCategoriesSpecificValues>().fieldValueTranslations.en,
+      type: SCThingType.Setting,
+    },
   };
 }

src/core/things/SportCourse.ts

@@ -12,8 +12,9 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCEvent, SCEventWithoutReferences} from '../base/Event';
+import {SCEvent, SCEventMeta, SCEventWithoutReferences} from '../base/Event';
 import {SCThingMeta, SCThingType} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
 
 /**
  * A sport course without references
@@ -38,13 +39,36 @@ export interface SCSportCourse extends SCEvent, SCSportCourseWithoutReferences {
 }
 
 /**
- * Sport course meta data
+ * Meta information about a sport course
  */
-export class SCSportCourseMeta extends SCThingMeta {
-  static fieldValueTranslations = {
-    ...SCThingMeta.fieldValueTranslations,
+export class SCSportCourseMeta extends SCThingMeta implements SCMetaTranslations<SCSportCourse> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
     de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
+      ... SCEventMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+      ... SCEventMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+      ... SCEventMeta.getInstance().fieldValueTranslations.de,
       type: 'Sportkurs',
     },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+      ... SCEventMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.SportCourse,
+    },
   };
 }

src/core/things/StudyModule.ts

@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2018-2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {SCAcademicPriceGroup,
+        SCThingThatCanBeOffered,
+        SCThingThatCanBeOfferedTranslatableProperties} from '../base/ThingThatCanBeOffered';
+import {SCThingMeta, SCThingType} from '../Thing';
+import {SCLanguage, SCMetaTranslations, SCTranslations} from '../types/i18n';
+import {SCMap} from '../types/Map';
+import {SCAcademicEventWithoutReferences} from './AcademicEvent';
+import {SCOrganizationWithoutReferences} from './Organization';
+import {SCPersonWithoutReferences} from './Person';
+
+/**
+ * A study module without references
+ */
+export interface SCStudyModuleWithoutReferences extends
+                 SCThingThatCanBeOffered<SCAcademicPriceGroup> {
+
+  /**
+   * ECTS points (European Credit Transfer System)
+   */
+  ects: number;
+
+  /**
+   * The language in which the study module is offered
+   */
+  language: SCLanguage;
+
+  /**
+   * Majors that this study module is meant for
+   */
+  majors: string[];
+
+  /**
+   * Represents the modules necessity for each given major (of the major property)
+   */
+  necessity: SCMap<SCStudyModuleNecessity>;
+
+  /**
+   * Translated fields of a study module
+   */
+  translations?: SCTranslations<SCStudyModuleTranslatableProperties>;
+
+  /**
+   * Type of the study module
+   */
+  type: SCThingType.StudyModule;
+}
+
+/**
+ * A study module
+ * 
+ * @validatable
+ */
+export interface SCStudyModule extends SCStudyModuleWithoutReferences {
+  /**
+   * Academic events that make up a study module
+   */
+  academicEvents: SCAcademicEventWithoutReferences[];
+
+  /**
+   * The faculty that manages and curates the study module
+   */
+  faculty: SCOrganizationWithoutReferences;
+
+  /**
+   * Study modules needed for each others fulfillment
+   */
+  partnerModules?: SCStudyModuleWithoutReferences[];
+
+  /**
+   * Study modules required beforehand
+   */
+  requiredModules?: SCStudyModuleWithoutReferences[];
+
+  /**
+   * The secretary that administers requests and 
+   * questions concerning the study module by eg. students
+   */
+  secretary: SCOrganizationWithoutReferences | SCPersonWithoutReferences;
+}
+
+export interface SCStudyModuleTranslatableProperties
+       extends SCThingThatCanBeOfferedTranslatableProperties {
+  /**
+   * Translations of the majors that this study module is meant for
+   */
+  majors?: string[];
+
+  /**
+   * Translations of the modules necessity for each given major (of the major property)
+   */
+  necessity: SCMap<SCStudyModuleNecessity>;
+}
+
+/** 
+ * Represents a modules necessity (in a major) as it may be required, optional or 
+ * is in a pool of n optional modules were m out of them have to be taken/completed.
+ * Hence the elective option.
+ */
+export enum SCStudyModuleNecessity {
+  Required = 'required',
+  Elective = 'elective',
+  Optional = 'optional',
+}
+
+/**
+ * Study module meta data
+ */
+export class SCStudyModuleMeta extends SCThingMeta implements SCMetaTranslations<SCStudyModule> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingMeta.getInstance().fieldTranslations.de,
+      academicEvents: 'Veranstaltungen',
+      ects: 'ECTS-Punkte',
+      faculty: 'Fachbereich',
+      language: 'Unterrichtssprache',
+      majors: 'Fachrichtungen',
+      necessity: 'Erforderlichkeit',
+      partnerModules: 'Partnermodule',
+      requiredModules: 'Benötigte Module',
+      secretary: 'Sekretariat',
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldTranslations.en,
+      academicEvents: 'academic events',
+      ects: 'ECTS points',
+      faculty: 'faculty',
+      language: 'teaching language',
+      majors: 'majors',
+      necessity: 'necessity',
+      partnerModules: 'partner modules',
+      requiredModules: 'required modules',
+      secretary: 'secretary',
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.de,
+      necessity: {
+        'elective' : 'Wahlfach',
+        'optional' : 'optional',
+        'required' : 'benötigt',
+      },
+      type: 'Studiengangmodul',
+    },
+    en: {
+      ... SCThingMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.StudyModule,
+    },
+  };
+}

src/core/things/Ticket.ts

@@ -12,8 +12,9 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThingInPlace} from '../base/ThingInPlace';
+import {SCThingInPlace, SCThingInPlaceMeta} from '../base/ThingInPlace';
 import {SCThing, SCThingMeta, SCThingType} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
 import {SCISO8601Duration} from '../types/Time';
 
 /**
@@ -56,11 +57,30 @@ export interface SCTicket extends SCTicketWithoutReferences, SCThingInPlace {
 /**
  * Meta information about a ticket
  */
-export class SCTicketMeta extends SCThingMeta {
-  static fieldValueTranslations = {
-    ...SCThingMeta.fieldValueTranslations,
+export class SCTicketMeta extends SCThingMeta implements SCMetaTranslations<SCTicket> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
     de: {
+      ... SCThingInPlaceMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingInPlaceMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingInPlaceMeta.getInstance().fieldValueTranslations.de,
       type: 'Ticket',
     },
+    en: {
+      ... SCThingInPlaceMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Ticket,
+    },
   };
 }

src/core/things/ToDo.ts

@@ -12,8 +12,12 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCThingWithCategoriesSpecificValues, SCThingWithCategoriesWithoutReferences} from '../base/ThingWithCategories';
-import {SCThingType} from '../Thing';
+import {
+  SCThingWithCategoriesSpecificValues,
+  SCThingWithCategoriesWithoutReferences,
+  SCThingWithCategoriesWithoutReferencesMeta} from '../base/ThingWithCategories';
+import {SCThingMeta, SCThingType} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
 import {SCISO8601Date} from '../types/Time';
 
 /**
@@ -58,3 +62,38 @@ export enum SCToDoPriority {
   NORMAL = 2,
   HIGH = 5,
 }
+
+/**
+ * Meta information about todo
+ */
+export class SCToDoMeta extends SCThingMeta implements SCMetaTranslations<SCToDo> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<string,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.de,
+    },
+    en: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<string,
+            SCThingWithCategoriesSpecificValues>().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<string,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.de,
+      type: 'ToDo',
+    },
+    en: {
+      ... SCThingWithCategoriesWithoutReferencesMeta.getInstance<string,
+            SCThingWithCategoriesSpecificValues>().fieldValueTranslations.en,
+      type: SCThingType.ToDo,
+    },
+  };
+}

src/core/things/Tour.ts

@@ -13,6 +13,7 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {SCThing, SCThingMeta, SCThingType} from '../Thing';
+import {SCMetaTranslations} from '../types/i18n';
 
 /**
  * A tour without references
@@ -49,7 +50,7 @@ export interface SCTour extends SCTourWithoutReferences {
 /**
  * Meta information about a tour
  */
-export class SCTourMeta extends SCThingMeta {
+export class SCTourMeta extends SCThingMeta implements SCMetaTranslations<SCTour> {
 }
 
 /**

src/core/things/Video.ts

@@ -12,9 +12,9 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCCreativeWork, SCCreativeWorkWithoutReferences} from '../base/CreativeWork';
+import {SCCreativeWork, SCCreativeWorkMeta, SCCreativeWorkWithoutReferences} from '../base/CreativeWork';
 import {SCThingMeta, SCThingType} from '../Thing';
-import {SCLanguage} from '../types/i18n';
+import {SCLanguage, SCMetaTranslations} from '../types/i18n';
 import {SCISO8601Duration} from '../types/Time';
 import {SCPersonWithoutReferences} from './Person';
 
@@ -114,19 +114,33 @@ export interface SCVideo extends SCCreativeWork, SCVideoWithoutReferences {
   type: SCThingType.Video;
 }
 
-export class SCVideoMeta extends SCThingMeta {
-  static fieldValueTranslations = {
-    ...SCThingMeta.fieldValueTranslations,
+/**
+ * Meta information about a video
+ */
+export class SCVideoMeta extends SCThingMeta implements SCMetaTranslations<SCVideo> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
     de: {
-      actors: 'Darsteller',
-      duration: 'Länge',
-      height: 'Höhe',
-      language: 'Sprache',
-      size: 'Größe',
-      sources: 'Quellen',
-      transcript: 'Abschrift',
+      ... SCCreativeWorkMeta.getInstance().fieldTranslations.de,
+    },
+    en: {
+      ... SCCreativeWorkMeta.getInstance().fieldTranslations.en,
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations  = {
+    de: {
+      ... SCCreativeWorkMeta.getInstance().fieldValueTranslations.de,
       type: 'Video',
-      width: 'Breite',
+    },
+    en: {
+      ... SCCreativeWorkMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Video,
     },
   };
 }

src/core/types/Guards.ts

@@ -16,7 +16,20 @@ import {SCThingWithTranslations} from '../base/ThingWithTranslations';
 import {SCBulkResponse} from '../protocol/routes/bulk/BulkResponse';
 import {SCMultiSearchResponse} from '../protocol/routes/search/MultiSearchResponse';
 import {SCSearchResponse} from '../protocol/routes/search/SearchResponse';
-import {SCThing} from '../Thing';
+import {SCThing, SCThingType} from '../Thing';
+
+/**
+ * Type guard to check if something is a SCThing
+ *
+ * @param {any} something Something to check
+ */
+export function isThing(something: any): something is SCThing {
+  return (
+    typeof something === 'object'
+    && typeof something.type === 'string'
+    && Object.values(SCThingType).indexOf(something.type) >= 0
+  );
+}
 
 /**
  * Type guard to check if translations exist
@@ -59,11 +72,10 @@ export function isSearchResponse(something: any): something is SCSearchResponse
 /**
  * Type guard to check if something is a multi search response
  *
- *
  * @param something Something to check
  */
 export function isMultiSearchResponse(something: any): something is SCMultiSearchResponse {
   return Object.keys(something).reduce((previousOnesAreSearchResponses, key) => {
     return previousOnesAreSearchResponses && isSearchResponse(something[key]);
-  }, true);
+  }, true as boolean);
 }

src/core/types/Map.ts

@@ -15,10 +15,10 @@
 
 /**
  * Capsulation for a map with a string as key with values of type `T`
- * 
+ *
  * !!! BEWARE !!!
  * Can't be refactored to a `Map<K, V>`, because it can't be serialized via JSON.stringify(map)
- * 
+ *
  * @typeparam T Can be any type.
  */
 export interface SCMap<T> {
@@ -27,3 +27,20 @@ export interface SCMap<T> {
    */
   [key: string]: T;
 }
+
+/**
+ * Restricted map with keys, limited to values of `U`, and corresponding values of type `T`
+ *
+ * !!! BEWARE !!!
+ * Can't be refactored to a `Map<K, V>`, because it can't be serialized via JSON.stringify(map)
+ * Also note, that this is a type not an interface
+ *
+ * @typeparam U Must be a type the `in` operator can be applied to and contains only strings or numbers
+ * @typeparam T Can be any type
+ */
+export type SCRestrictedMap<U extends string | number, T> = {
+  /**
+   * One value for each key
+   */
+  [key in U]: T
+};

src/core/types/Places.ts

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {SCBuildingWithoutReferences} from '../things/Building';
+import {SCPointOfInterestWithoutReferences} from '../things/PointOfInterest';
+import {SCRoomWithoutReferences} from '../things/Room';
+/**
+ * Something that is or happens in a place
+ * 
+ * !Important!
+ * This is not a SCThing.
+ */
+export interface SCInPlace {
+  /**
+   * Place the thing is or happens in
+   */
+  inPlace?:
+    SCBuildingWithoutReferences
+    | SCPointOfInterestWithoutReferences
+    | SCRoomWithoutReferences;
+}

src/core/types/config/Backend.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018-2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -15,7 +15,7 @@
 import {SCThingType} from '../../Thing';
 import {SCSearchSortType} from '../sorts/Abstract';
 import {SCUuid} from '../UUID';
-import {SCMap} from './../Map';
+import {SCMap, SCRestrictedMap} from './../Map';
 import {SCMonitoringConfiguration} from './Monitoring';
 
 /**
@@ -35,6 +35,11 @@ export interface SCBackendConfiguration {
    */
   maxMultiSearchRouteQueries: number;
 
+  /**
+   * Maximum body size for requests
+   */
+  maxRequestBodySize: number;
+
   /**
    * Name of university
    */
@@ -67,7 +72,7 @@ export interface SCBackendConfigurationSortableField {
 
   /**
    * A list of SC types on which this field exists
-   * 
+   *
    * If no type is given it is assumed it exists on every type
    */
   onlyOnTypes?: SCThingType[];
@@ -80,22 +85,26 @@ export interface SCBackendConfigurationSortableField {
 }
 
 /**
- * Values of a field that should be boosted by the given factors
+ * Possible context names to be used by the search request
  */
-export interface SCBackendConfigurationSearchBoostingValues {
+export type SCSearchContext =
+  | 'default'
+  | 'dining'
+  | 'place';
 
-  /**
-   * Value of the field that should be boosted by the given number
-   *
-   * For example `"SS 2019": 2`
-   */
-  [valueOfField: string]: number;
-}
+/**
+ * A boosting configuration for one context
+ */
+export type SCBackendConfigurationSearchBoostingContext =
+  SCRestrictedMap<
+    SCSearchContext,
+    SCBackendConfigurationSearchBoostingType[]
+  >;
 
 /**
  * A boosting configuration for one SCType
  */
-export interface SCBackendConfigurationSearchBoosting {
+export interface SCBackendConfigurationSearchBoostingType {
 
   /**
    * The factor of which the scores matching this type should be multiplied by
@@ -103,11 +112,15 @@ export interface SCBackendConfigurationSearchBoosting {
   factor: number;
 
   /**
+   * Outer-Map:
    * Fields of this type that should be boosted if they match a given value
-   *
    * For nest fields you can use the `.` as a separator. For example `academicTerms.acronym`
+   *
+   * Inner-map:
+   * Value of the field that should be boosted by the given number
+   * For example `"SS 2019": 2`
    */
-  fields?: SCMap<SCBackendConfigurationSearchBoostingValues>;
+  fields?: SCMap<SCMap<number>>;
 
   /**
    * Type of things the factor should be applied to
@@ -147,7 +160,7 @@ export interface SCBackendInternalConfiguration {
    * The resulting scores of matching objects can be boosted (multiplied by a number) to change the order in the
    * set of results
    */
-  boostings: SCBackendConfigurationSearchBoosting[];
+  boostings: SCBackendConfigurationSearchBoostingContext;
 
   /**
    * Configuration of the database
@@ -163,14 +176,10 @@ export interface SCBackendInternalConfiguration {
 /**
  * Configuration of the database
  */
-export interface SCBackendConfigurationDatabaseConfiguration {
+export interface SCBackendConfigurationDatabaseConfiguration extends SCMap<any> {
   /**
    * Name of the database used by the backend
    */
   name: string;
 
-  /**
-   * Allow additional configuration for the database
-   */
-  [key: string]: any;
 }

src/core/types/filters/Abstract.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018-2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -12,6 +12,7 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
+import {SCMap} from '../Map';
 /**
  * All available filter types
  */
@@ -47,9 +48,7 @@ export interface SCSearchAbstractFilter<T extends SCSearchAbstractFilterArgument
 /**
  * Arguments for the filter instruction
  */
-export interface SCSearchAbstractFilterArguments {
-  [key: string]: any;
-}
+export type SCSearchAbstractFilterArguments = SCMap<any>;
 
 /**
  * Available filter instructions

src/core/types/i18n.ts

@@ -17,7 +17,7 @@
  */
 export interface SCLanguage {
   /**
-   * The Alpha-2 Code of the Language
+   * The two letter ISO 639-1 Code of the Language
    */
   code: SCLanguageCode;
 
@@ -28,8 +28,8 @@ export interface SCLanguage {
 }
 
 /**
- * A list of possible languages
- *
+ * A list of possible languages in english
+ * 
  * @see https://en.wikipedia.org/wiki/ISO_639-1
  */
 export type SCLanguageName =
@@ -220,7 +220,9 @@ export type SCLanguageName =
   | 'zulu';
 
 /**
- * A List of all possible Languages as Alpha-2 Codes
+ * A List of all possible Languages as ISO 639-1 Codes
+ * 
+ * @see https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
  */
 export type SCLanguageCode =
   'aa'
@@ -668,7 +670,7 @@ export type SCNationality =
 /**
  * Translations for specific languages
  *
- * @see https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes
+ * @see https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
  */
 export interface SCTranslations<T> {
   /**
@@ -681,3 +683,37 @@ export interface SCTranslations<T> {
    */
   en?: T;
 }
+
+/**
+ * Type to represent requiredness of translation properties.
+ * Will be changed from RecursivePartial to RecursiveRequired in the future.
+ * (Source: https://stackoverflow.com/a/51365037)
+ */
+type RecursivePartial<T> = {
+  [P in keyof T]?:
+    T[P] extends Array<infer U> ? Array<RecursivePartial<U>> :
+    T[P] extends object ? RecursivePartial<T[P]> :
+    T[P];
+};
+
+/**
+ * Type to recursively map keys in <T> to a string value (used for translation)
+ */
+type SCRequiredTranslationKeys<T> = {
+  [key in keyof RecursivePartial<T>]: string;
+};
+
+/**
+ * Type that allows mapping from available keys of SCTranslations to SCRequiredTranslationKeys
+ */
+type SCRequiredTranslation<T> = {
+  [key in keyof SCTranslations<T>]: SCRequiredTranslationKeys<T>;
+};
+
+/**
+ * Interface to be implemented by all Meta classes
+ */
+export interface SCMetaTranslations<T> {
+  fieldTranslations: SCRequiredTranslation<T>;
+  fieldValueTranslations: any;
+}

src/core/types/sorts/Abstract.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018-2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -13,6 +13,7 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {SCThingsField} from '../../Classes';
+import {SCMap} from '../Map';
 import {SCDistanceSort} from './Distance';
 import {SCDucetSort} from './Ducet';
 import {SCPriceSort} from './Price';
@@ -40,12 +41,7 @@ export interface SCSearchAbstractSort<T extends SCSearchAbstractSortArguments> {
 /**
  * Map of arguments for the sort instruction
  */
-export interface SCSearchAbstractSortArguments {
-  /**
-   * Index signature for additional arguments
-   */
-  [key: string]: any;
-
+export interface SCSearchAbstractSortArguments extends SCMap<any> {
   /**
    * Field to sort by
    */

test/Guards.spec.ts

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2018, 2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {expect} from 'chai';
+import {slow, suite, test, timeout} from 'mocha-typescript';
+import {SCThingOriginType, SCThingType} from '../src/core/Thing';
+import {SCDish} from '../src/core/things/Dish';
+import {isThing} from '../src/core/types/Guards';
+
+@suite(timeout(10000), slow(5000))
+export class GuardsSpec {
+  @test
+  public isThing() {
+    const notADish = {
+      categories: [
+        'appetizer',
+      ],
+      name: 'foo',
+      origin: {
+        created: '',
+        type: SCThingOriginType.User,
+      },
+      type: 'foobar',
+      uid: 'bar',
+    };
+
+    const dish: SCDish = {
+      categories: [
+        'appetizer',
+      ],
+      name: 'foo',
+      origin: {
+        created: '',
+        type: SCThingOriginType.User,
+      },
+      type: SCThingType.Dish,
+      uid: 'bar',
+    };
+
+    expect(isThing('foo')).to.be.equal(false);
+
+    expect(isThing(notADish)).to.be.equal(false);
+
+    expect(isThing(dish)).to.be.equal(true);
+  }
+}

test/Translator.spec.ts

@@ -0,0 +1,263 @@
+/*
+ * Copyright (C) 2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {expect} from 'chai';
+import clone = require('fast-clone');
+import {slow, suite, test, timeout} from 'mocha-typescript';
+
+import {SCThingOriginType, SCThingType} from '../src/core/Thing';
+import {SCBuildingWithoutReferences} from '../src/core/things/Building';
+import {SCDish, SCDishMeta} from '../src/core/things/Dish';
+import {SCThingTranslator} from '../src/core/Translator';
+
+const building: SCBuildingWithoutReferences = {
+  address: {
+    addressCountry : 'base-address.addressCountry',
+    addressLocality: 'base-address.addressLocality',
+    postalCode: 'base-address.postalCode',
+    streetAddress: 'base-address.streetAddress',
+  },
+  categories: ['office', 'education'],
+  floors: ['base-floor0', 'base-floor1'],
+  geo: {
+    point: {
+      coordinates: [12.0, 13.0],
+      type: 'Point',
+    },
+  },
+  name: 'base-space-name',
+  origin: {
+    indexed: '1970-01-01T00:00:00.000Z',
+    name: 'building-connector',
+    type: SCThingOriginType.Remote,
+  },
+  translations: {
+    de: {
+      address: {
+        addressCountry : 'de-address.addressCountry',
+        addressLocality: 'de-address.addressLocality',
+        postalCode: 'de-address.postalCode',
+        streetAddress: 'de-address.streetAddress',
+      },
+      floors: ['de-floor0', 'de-floor1'],
+      name: 'de-space-name',
+    },
+  },
+  type: SCThingType.Building,
+  uid: '540862f3-ea30-5b8f-8678-56b4dc217140',
+
+};
+
+const dish: SCDish = {
+  categories: ['main dish', 'dessert'],
+  characteristics: [{name: 'base-characteristic0'}, {name: 'base-characteristic1'}],
+  name: 'base-dish-name',
+  offers: [
+    {
+    availability: 'in stock',
+    inPlace: building,
+    prices: {
+      default: 23.42,
+    },
+    provider: {
+      name: 'base-provider',
+      origin: {
+        indexed: '1970-01-01T00:00:00.000Z',
+        name: 'dish-connector',
+        type: SCThingOriginType.Remote,
+        },
+      type: SCThingType.Organization,
+      uid: '540862f3-ea30-5b8f-8678-56b4dc217141',
+      },
+    },
+  ],
+  origin: {
+    indexed: '1970-01-01T00:00:00.000Z',
+    name: 'dish-connector',
+    type: SCThingOriginType.Remote,
+  },
+  translations: {
+    de: {
+      characteristics: [{name: 'de-characteristic0'}, {name: 'de-characteristic1'}],
+      name: 'de-dish-name',
+    },
+  },
+  type: SCThingType.Dish,
+  uid: '540862f3-ea30-5b8f-8678-56b4dc217140',
+};
+
+const translator = new SCThingTranslator('de');
+// tslint:disable-next-line:no-eval
+const languageNonExistant = eval("'jp'");
+// this will simulate a translator always utilizing the base language translations
+const translatorWithFallback = new SCThingTranslator(languageNonExistant);
+
+// tslint:disable:member-ordering TranslationSpecInplace
+@suite(timeout(10000), slow(5000))
+export class TranslationSpecInplace {
+
+  @test
+  public directStringLiteralType() {
+    expect(translator.translate(dish).type()).to.equal('Essen');
+  }
+
+  @test
+  public directStringProperty() {
+    expect(translator.translate(dish).name()).to.equal('de-dish-name');
+  }
+
+  @test
+  public directArrayOfString() {
+    expect(translator.translate(dish).characteristics()).to.deep
+    .equal([{name: 'de-characteristic0'}, {name: 'de-characteristic1'}]);
+  }
+
+  @test
+  public directArrayOfStringSubscript() {
+    expect(translator.translate(dish).characteristics[1]()).to.deep.equal({name: 'de-characteristic1'});
+  }
+
+  @test
+  public directMetaArrayOfString() {
+    expect(translator.translate(dish).categories()).to.deep.equal(['Hauptgericht', 'Nachtisch']);
+  }
+
+  @test
+  public directMetaArrayOfStringSubscript() {
+    expect(translator.translate(dish).categories[1]()).to.equal('Nachtisch');
+  }
+
+  @test
+  public nestedStringLiteralType() {
+    expect(translator.translate(dish).offers[0].inPlace.type()).to.equal('Gebäude');
+  }
+
+  @test
+  public nestedStringProperty() {
+    expect(translator.translate(dish).offers[0].inPlace.name()).to.equal('de-space-name');
+  }
+
+  @test
+  public nestedMetaArrayOfString() {
+    expect(translator.translate(dish).offers[0].inPlace.categories()).to.deep.equal(['Büro', 'Bildung']);
+  }
+
+  @test
+  public nestedMetaArrayOfStringSubscript() {
+    expect(translator.translate(dish).offers[0].inPlace.categories[1]()).to.equal('Bildung');
+  }
+
+  @test
+  public directStringLiteralTypeFallback() {
+    expect(translatorWithFallback.translate(dish).type()).to.equal('dish');
+  }
+
+  @test
+  public directStringPropertyFallback() {
+    expect(translatorWithFallback.translate(dish).name()).to.equal('base-dish-name');
+  }
+
+  @test
+  public directArrayOfStringSubscriptFallback() {
+    expect(translatorWithFallback.translate(dish).characteristics[1]())
+    .to.deep.equal({name: 'base-characteristic1'});
+  }
+
+  @test
+  public directMetaArrayOfStringFallback() {
+    expect(translatorWithFallback.translate(dish).categories()).to.deep.equal(['main dish', 'dessert']);
+  }
+
+  @test
+  public directMetaArrayOfStringSubscriptFallback() {
+    expect(translatorWithFallback.translate(dish).categories[1]()).to.equal('dessert');
+  }
+
+  @test
+  public nestedStringLiteralTypeFallback() {
+    expect(translatorWithFallback.translate(dish).offers[0].inPlace.type()).to.equal('building');
+  }
+
+  @test
+  public nestedStringPropertyFallback() {
+    expect(translatorWithFallback.translate(dish).offers[0].inPlace.name()).to.equal('base-space-name');
+  }
+
+  @test
+  public nestedMetaArrayOfStringFallback() {
+    expect(translatorWithFallback.translate(dish).offers[0].inPlace.categories())
+    .to.deep.equal(['office', 'education']);
+  }
+
+  @test
+  public nestedMetaArrayOfStringSubscriptFallback() {
+    expect(translatorWithFallback.translate(dish).offers[0].inPlace.categories[1]()).to.equal('education');
+  }
+
+  @test
+  public directStringLiteralTypeUndefined() {
+    // tslint:disable-next-line:no-eval
+    const undefinedThing = eval('(x) => undefined;');
+    expect(translator.translate(undefinedThing())('defaultValue')).to.equal('defaultValue');
+    expect(translator.translate(dish).name('defaultValue')).to.not.equal('defaultValue');
+  }
+
+  @test
+  public nestedMetaArrayOfStringSubscriptUndefined() {
+    expect(translator.translate(dish).offers[0].inPlace.categories[1234]('printer')).to.equal('printer');
+    expect(translator.translate(dish).offers[0].inPlace.categories[1]('printer')).to.not.equal('printer');
+  }
+
+  @test
+  public changingTranslatorLanguageFlushesItsLRUCache() {
+    const translatorDE = new SCThingTranslator('de');
+    expect(translatorDE.translate(dish).name()).to.equal('de-dish-name');
+    translatorDE.language = 'en';
+    expect(translatorDE.translate(dish).name()).to.equal('base-dish-name');
+  }
+
+  @test
+  public forceTranslatorLRUCacheToOverflow() {
+    const translatorDE = new SCThingTranslator('de');
+    // Make sure to add more elements to the translator cache than the maximum cache capacity. See Translator.ts
+    for (let i = 0; i < 201; i++) {
+      const anotherDish = Object.assign({}, dish);
+      anotherDish.uid = String(i);
+      expect(translatorDE.translate(anotherDish).name()).to.equal('de-dish-name');
+    }
+  }
+}
+
+// tslint:disable:member-ordering no-eval no-unused-expression TranslationSpec
+@suite(timeout(10000), slow(5000))
+export class MetaTranslationSpec {
+
+  @test
+  public consistencyWithMetaClass() {
+    const dishMetaTranslationsDE = translator.translatedPropertyNames(dish);
+    const dishMetaTranslationsEN = translator.translatedPropertyNames(dish, 'en');
+    expect(dishMetaTranslationsDE).to.deep.equal(SCDishMeta.getInstance().fieldTranslations.de);
+    expect(dishMetaTranslationsEN).to.deep.equal(SCDishMeta.getInstance().fieldTranslations.en);
+  }
+
+  @test
+  public thingWithoutMetaClass() {
+    const dishCopy = clone(dish);
+    const typeNonExistant = eval("(x) => x + 'typeNonExistant';");
+    // this will assign a non existant SCThingType to dishCopy
+    dishCopy.type = typeNonExistant();
+    const dishMetaTranslationsDE = translator.translatedPropertyNames(dishCopy);
+    expect(dishMetaTranslationsDE).to.be.undefined;
+  }
+}

test/resources/AcademicEvent.1.json

@@ -3,7 +3,7 @@
   "instance": {
     "type": "academic event",
     "description": "Fortsetzung der Algebra I: Galoistheorie mit Anwendungen, ausgewählte Spezialthemen.",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "681a59a1-23c2-5d78-861a-8c86a3abf2b9",
     "name": "Algebra II",
     "categories": [
       "lecture"
@@ -31,7 +31,7 @@
     "performers": [
       {
         "type": "person",
-        "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+        "uid": "7f8ce700-2679-51a5-86b5-3dfba85a33ff",
         "givenName": "Peter",
         "familyName": "Bürgisser",
         "gender": "male",
@@ -59,7 +59,7 @@
       "maintainer": {
         "type": "organization",
         "name": "tubIT",
-        "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+        "uid": "25f76840-db89-5da2-a8a2-75992f637613",
         "origin": {
           "indexed": "2018-09-11T12:30:00Z",
           "name": "Dummy",
@@ -70,7 +70,7 @@
       "originalId": "foo bar",
       "responsibleEntity": {
         "type": "person",
-        "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+        "uid": "7f8ce700-2679-51a5-86b5-3dfba85a33ff",
         "givenName": "Peter",
         "familyName": "Bürgisser",
         "gender": "male",

test/resources/AcademicEvent.2.json

@@ -3,7 +3,7 @@
   "instance": {
     "type": "academic event",
     "description": "Grundlagen, algebraische Grundbegriffe, Vektorräume, lineare Abbildungen und Gleichungen, Determinanten",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "b17eb963-42b5-5861-adce-2b7b2607ef0a",
     "name": "Lineare Algebra I für Mathematiker",
     "categories": [
       "lecture"
@@ -31,7 +31,7 @@
     "performers": [
       {
         "type": "person",
-        "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+        "uid": "fc8b10cf-10c0-5b92-b16e-92ff734676da",
         "givenName": "Jörg",
         "familyName": "Liesen",
         "gender": "male",

test/resources/AcademicEvent.3.json

@@ -1,9 +1,9 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "academic event",
     "description": "Die Übung hat 2 SWS und wird auf 2 Gruppen verteilt.",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "7e2b64b0-925d-5f63-b464-a6e3e9492411",
     "name": "Algebra II",
     "categories": [
       "tutorial"
@@ -31,7 +31,7 @@
     "performers": [
       {
         "type": "person",
-        "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+        "uid": "97be73c0-5319-579a-a393-c4eeeacae58b",
         "givenName": "Paul",
         "familyName": "Breiding",
         "gender": "male",
@@ -44,7 +44,7 @@
       },
       {
         "type": "person",
-        "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+        "uid": "0db9b55a-4c27-5faf-9bf0-4b564be45a08",
         "givenName": "Pierre",
         "familyName": "Lairez",
         "gender": "male",

test/resources/Article.1.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+  "instance": {
+    "uid": "8d8bd89c-8429-5f81-b754-15a5be55e593",
     "type": "article",
     "categories": [
       "unipedia"

test/resources/Article.2.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+  "instance": {
+    "uid": "4f772b29-0b28-53a4-a8b9-206d9b425962",
     "type": "article",
     "categories": [
       "unipedia"

test/resources/Book.1.json

@@ -1,13 +1,13 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "book",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "a0520263-29ae-5357-a3ce-ba1902d121e0",
     "name": "Kundenorientierung durch Quality Function Deployment: Systematisches Entwickeln von Produkten und Dienstleistungen",
     "authors": [
       {
         "type": "person",
-        "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+        "uid": "10dfe386-71b4-554a-beb1-2d38561e42f8",
         "name": "Jutta Saatweber",
         "givenName": "Jutta",
         "familyName": "Saatweber",
@@ -22,7 +22,7 @@
     "publishers": [
       {
         "type": "organization",
-        "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+        "uid": "28df2bb9-c854-5898-b9d5-1abbd3524804",
         "name": "Symposion Publishing",
         "origin": {
           "indexed": "2018-09-11T12:30:00Z",

test/resources/Book.2.json

@@ -1,13 +1,13 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "book",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "db47f7f4-7699-5a37-afcc-24beaa998d36",
     "name": "Minimal Book",
     "authors": [
       {
         "type": "person",
-        "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+        "uid": "10dfe386-71b4-554a-beb1-2d38561e42f8",
         "name": "Jutta Saatweber",
         "givenName": "Jutta",
         "familyName": "Saatweber",

test/resources/Building.1.json

@@ -1,6 +1,6 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "geo": {
       "point": {
         "type": "Point",
@@ -150,7 +150,7 @@
     "alternateNames": [
       "MA"
     ],
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "edfaba58-254f-5da0-82d6-3b46a76c48ce",
     "categories": [
       "education"
     ],

test/resources/Catalog.1.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "64bb29ed-21e5-50c7-9d7c-1dc4741001b9",
+  "instance": {
+    "uid": "c8dc1f7f-9e3e-5b1f-8c38-084f46413b87",
     "type": "catalog",
     "level": 1,
     "categories": [

test/resources/Catalog.2.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "5a1f4f51-2498-5af1-91cb-c939673cc69c",
+  "instance": {
+    "uid": "5a8bc725-8658-528f-b515-5f7cd6987169",
     "type": "catalog",
     "level": 3,
     "description": "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.",

test/resources/CourseOfStudies.1.json

@@ -1,6 +1,6 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "academicDegree": "bachelor",
     "academicDegreewithField": "Bachelor of Arts",
     "academicDegreewithFieldShort": "B.A.",
@@ -12,7 +12,7 @@
         "type": "remote"
       },
       "type": "organization",
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140"
+      "uid": "b0f878fd-8fda-53b8-b065-a8d854c3d0d2"
     },
     "mainLanguage": {
       "code": "de",
@@ -34,11 +34,11 @@
         "type": "remote"
       },
       "type": "organization",
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140"
+      "uid": "b0f878fd-8fda-53b8-b065-a8d854c3d0d2"
     },
     "timeMode": "parttime",
     "type": "course of studies",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140"
+    "uid": "4c6f0a18-343d-5175-9fb1-62d28545c2aa"
   },
   "schema": "SCCourseOfStudies"
 }

test/resources/DateSeries.1.json

@@ -1,8 +1,8 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "date series",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "1b421872-1b4c-579b-ba03-688f943d59ad",
     "name": "Einführung in die Wirtschaftspolitik",
     "duration": "PT2H",
     "inPlace": {
@@ -10,7 +10,7 @@
       "categories": [
         "education"
       ],
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+      "uid": "5a4bbced-8e1f-5f29-a1d1-336e455ce7f9",
       "name": "H 0105",
       "geo": {
         "point": {
@@ -33,7 +33,7 @@
     ],
     "event": {
       "type": "academic event",
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+      "uid": "dbb4e5e1-0789-59c1-9970-877430af56b3",
       "name": "Einführung in die Wirtschaftspolitik",
       "categories": [
         "written exam"

test/resources/DateSeries.2.json

@@ -1,8 +1,8 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "date series",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "4ce41895-4b54-52db-b86f-7e6920b975c8",
     "name": "Distributed Algorithms",
     "duration": "PT4H",
     "inPlace": {
@@ -19,7 +19,7 @@
       "categories": [
         "education"
       ],
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+      "uid": "b535c86a-777b-54c3-b89a-cad528d0580f",
       "name": "EMH 225",
       "floor": "2",
       "origin": {
@@ -34,7 +34,7 @@
     ],
     "event": {
       "type": "academic event",
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+      "uid": "e6fb74d4-c6d9-59bb-930f-e47eb6e39432",
       "name": "Distributed Algorithms",
       "categories": [
         "written exam"

test/resources/DateSeries.3.json

@@ -0,0 +1,77 @@
+{
+  "errorNames": [],
+  "instance": {
+    "type": "date series",
+    "uid": "e6462830-187a-50b1-bdb4-8f39e49a88b8",
+    "name": "Dance course for beginners",
+    "duration": "PT8H",
+    "inPlace": {
+      "geo": {
+        "point": {
+          "type": "Point",
+          "coordinates": [
+            13.3266207,
+            52.5144409
+          ]
+        }
+      },
+      "type": "room",
+      "categories": [
+        "student union"
+      ],
+      "uid": "b535c86a-777b-54c3-b89a-cad528d0580f",
+      "name": "EMH 225",
+      "floor": "2",
+      "origin": {
+        "indexed": "2018-09-11T12:30:00Z",
+        "name": "Dummy",
+        "type": "remote"
+      }
+    },
+    "frequency": "once",
+    "dates": [
+      "2016-04-12T11:00:00+00:00"
+    ],
+    "event": {
+      "type": "academic event",
+      "uid": "4f86e8bb-ce73-520b-bfd9-e1ba9f754391",
+      "name": "Dance course for beginners",
+      "categories": [
+        "special"
+      ],
+      "origin": {
+        "indexed": "2018-09-11T12:30:00Z",
+        "name": "Dummy",
+        "type": "remote"
+      }
+    },
+    "origin": {
+      "indexed": "2018-09-11T12:30:00Z",
+      "name": "Dummy",
+      "type": "remote"
+    },
+    "offers": [
+      {
+        "availability": "in stock",
+        "availabilityStarts": "2017-01-30T00:00:00.000Z",
+        "availabilityEnds": "2017-01-30T23:59:59.999Z",
+        "prices": {
+          "default": 6.5,
+          "student": 5,
+          "alumni": 5
+        },
+        "provider": {
+          "name": "Studentenwerk",
+          "origin": {
+            "indexed": "2018-09-11T12:30:00Z",
+            "name": "Dummy",
+            "type": "remote"
+          },
+          "type": "organization",
+          "uid": "3b9b3df6-3a7a-58cc-922f-c7335c002634"
+        }
+      }
+    ]
+  },
+  "schema": "SCDateSeries"
+}

test/resources/Diff.1.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+  "instance": {
+    "uid": "a5acde0d-18c4-5511-9f86-aabf2a530f91",
     "dateCreated": "2017-02-07T09:26:35.957Z",
     "name": "changed_testuid",
     "changes": [
@@ -14,7 +14,7 @@
     "action": "changed",
     "type": "diff",
     "object": {
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+      "uid": "072db1e5-e479-5040-88e0-4a98d731e443",
       "name": "Name One",
       "type": "message",
       "message": "Message",

test/resources/Diff.2.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+  "instance": {
+    "uid": "f71cc2c8-fef2-59ee-af0a-511cc75e7471",
     "dateCreated": "2017-03-07T09:26:35.957Z",
     "name": "changed_testuid",
     "changes": [
@@ -14,7 +14,7 @@
     "action": "changed",
     "type": "diff",
     "object": {
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+      "uid": "072db1e5-e479-5040-88e0-4a98d731e443",
       "name": "Name One",
       "type": "message",
       "message": "Message",

test/resources/Dish.1.json

@@ -1,6 +1,6 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "dish",
     "name": "Pizza mit Geflügelsalami und Champignons",
     "categories": [
@@ -21,12 +21,23 @@
         "availability": "in stock",
         "availabilityStarts": "2017-01-30T00:00:00.000Z",
         "availabilityEnds": "2017-01-30T23:59:59.999Z",
-        "price": 2.85,
         "prices": {
+          "default": 4.85,
           "student": 2.85,
-          "employee": 2.85
+          "employee": 3.85,
+          "guest": 4.85
         },
         "provider": {
+          "name": "Studentenwerk",
+          "origin": {
+            "indexed": "2018-09-11T12:30:00Z",
+            "name": "Dummy",
+            "type": "remote"
+          },
+          "type": "organization",
+          "uid": "3b9b3df6-3a7a-58cc-922f-c7335c002634"
+        },
+        "inPlace": {
           "geo": {
             "point": {
               "type": "Point",
@@ -45,7 +56,7 @@
           "alternateNames": [
             "MensaHardenberg"
           ],
-          "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+          "uid": "72fbc8a3-ebd1-58f9-9526-ad65cba2e402",
           "address": {
             "addressCountry": "Germany",
             "addressLocality": "Berlin",
@@ -61,7 +72,7 @@
         }
       }
     ],
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "c9f32915-8ed5-5960-b850-3f7375a89922",
     "origin": {
       "indexed": "2018-09-11T12:30:00Z",
       "name": "Dummy",

test/resources/Dish.2.json

@@ -1,6 +1,6 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "dish",
     "name": "Sahne-Bärlauchsauce",
     "description": "Nudelauswahl",
@@ -9,15 +9,25 @@
     ],
     "offers": [
       {
-        "price": 2.45,
         "prices": {
+          "default": 3.45,
           "student": 2.45,
-          "employee": 2.45
+          "employee": 3.45
+        },
+        "provider": {
+          "name": "Studentenwerk",
+          "origin": {
+            "indexed": "2018-09-11T12:30:00Z",
+            "name": "Dummy",
+            "type": "remote"
+          },
+          "type": "organization",
+          "uid": "3b9b3df6-3a7a-58cc-922f-c7335c002634"
         },
         "availability": "in stock",
         "availabilityStarts": "2017-01-30T00:00:00.000Z",
         "availabilityEnds": "2017-01-30T23:59:59.999Z",
-        "provider": {
+        "inPlace": {
           "geo": {
             "point": {
               "type": "Point",
@@ -36,7 +46,7 @@
           "alternateNames": [
             "MensaHardenberg"
           ],
-          "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+          "uid": "072db1e5-e479-5040-88e0-4a98d731e443",
           "address": {
             "addressCountry": "Germany",
             "addressLocality": "Berlin",
@@ -65,7 +75,7 @@
       "Weizen",
       "Milch(Laktose; Milcheiweiß)"
     ],
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "3222631f-82b3-5faf-a8e8-9c10719cc95b",
     "origin": {
       "indexed": "2018-09-11T12:30:00Z",
       "name": "Dummy",

test/resources/Dish.3.json

@@ -1,6 +1,6 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "additives": [
       "1 = mit Farbstoff",
       "2 = konserviert",
@@ -14,12 +14,7 @@
         "availabilityEnds": "2017-03-27T23:59:59.000Z",
         "availabilityStarts": "2017-03-27T00:00:00.000Z",
         "availability": "in stock",
-        "prices": {
-          "student": 4.9,
-          "employee": 6.5
-        },
-        "price": 6.5,
-        "provider": {
+        "inPlace": {
           "type": "room",
           "name": "Cafeteria LEVEL",
           "categories": [
@@ -44,6 +39,21 @@
             "name": "Dummy",
             "type": "remote"
           }
+        },
+        "prices": {
+          "default": 6.5,
+          "student": 4.9,
+          "employee": 6.5
+        },
+        "provider": {
+          "name": "Studentenwerk",
+          "origin": {
+            "indexed": "2018-09-11T12:30:00Z",
+            "name": "Dummy",
+            "type": "remote"
+          },
+          "type": "organization",
+          "uid": "3b9b3df6-3a7a-58cc-922f-c7335c002634"
         }
       }
     ],
@@ -70,7 +80,7 @@
         "type": "dish",
         "uid": "db0caac1-062c-5333-9fcb-cfaf0ff7d799",
         "nutrition": {
-          "calories": 106.00,
+          "calories": 106,
           "fatContent": 5.4,
           "saturatedFatContent": 1.8,
           "carbohydrateContent": 6.8,
@@ -103,7 +113,7 @@
         "type": "dish",
         "uid": "f702fd43-1551-53b2-b35a-b5916e1cf9a1",
         "nutrition": {
-          "calories": 106.00,
+          "calories": 106,
           "fatContent": 5.4,
           "saturatedFatContent": 1.8,
           "carbohydrateContent": 6.8,
@@ -127,9 +137,9 @@
       }
     ],
     "type": "dish",
-    "uid": "3b9b3df6-3a7a-58cc-922f-c7335c002634",
+    "uid": "1c99689c-c6ec-551f-8ad8-f13c5fa812c2",
     "nutrition": {
-      "calories": 600.00,
+      "calories": 600,
       "fatContent": 30.5,
       "saturatedFatContent": 9.9,
       "carbohydrateContent": 42.2,

test/resources/Favorite.json

@@ -1,13 +1,13 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "favorite",
     "name": "Favorite #1",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "3af3ccaa-f066-5eff-9a3d-a70567f3d70d",
     "data": {
       "type": "academic event",
       "description": "Grundlagen, algebraische Grundbegriffe, Vektorräume, lineare Abbildungen und Gleichungen, Determinanten",
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+      "uid": "b17eb963-42b5-5861-adce-2b7b2607ef0a",
       "name": "Lineare Algebra I für Mathematiker",
       "categories": [
         "lecture"

test/resources/Floor.1.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+  "instance": {
+    "uid": "0effdc13-d4af-5a63-a538-c4b2c080e253",
     "name": "MA E:0",
     "type": "floor",
     "inPlace": {
@@ -157,7 +157,7 @@
       "alternateNames": [
         "MA"
       ],
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+      "uid": "edfaba58-254f-5da0-82d6-3b46a76c48ce",
       "address": {
         "addressCountry": "Germany",
         "addressLocality": "Berlin",
@@ -3386,7 +3386,7 @@
             "categories": [
               "education"
             ],
-            "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+            "uid": "593655b5-0fc9-59de-a82f-b8f5f908deef",
             "name": "MA 043",
             "floor": "0",
             "origin": {
@@ -5534,7 +5534,7 @@
             "categories": [
               "learn"
             ],
-            "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+            "uid": "31b1ab4c-1803-51ed-8c66-59bfc97cd350",
             "name": "MA Foyer",
             "floor": "0",
             "origin": {
@@ -6353,7 +6353,7 @@
             "categories": [
               "education"
             ],
-            "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+            "uid": "56ce0744-ae39-5209-b18f-d3a6edcb8f0a",
             "name": "MA 042",
             "floor": "0",
             "origin": {
@@ -6468,7 +6468,7 @@
             "categories": [
               "education"
             ],
-            "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+            "uid": "96b7e555-1214-5ca8-8294-e8209ac04f5a",
             "name": "MA 041",
             "floor": "0",
             "origin": {
@@ -6703,7 +6703,7 @@
             "categories": [
               "education"
             ],
-            "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+            "uid": "ed50a94d-eb06-5d07-8058-dfbdeb6c3a0b",
             "name": "MA 001",
             "floor": "0",
             "origin": {

test/resources/Floor.2.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+  "instance": {
+    "uid": "3c56f5c4-006f-580e-8aff-9a9315f3fd81",
     "name": "H_4",
     "type": "floor",
     "inPlace": {
@@ -97,7 +97,7 @@
       "alternateNames": [
         "H"
       ],
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+      "uid": "ebe95e80-f826-5a70-a844-436b561d5181",
       "address": {
         "addressCountry": "Germany",
         "addressLocality": "Berlin",

test/resources/Floor.3.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+  "instance": {
+    "uid": "d6152601-0154-581a-8bb5-0d1643972a21",
     "name": "H_5",
     "type": "floor",
     "inPlace": {
@@ -97,7 +97,7 @@
       "alternateNames": [
         "H"
       ],
-      "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+      "uid": "ebe95e80-f826-5a70-a844-436b561d5181",
       "address": {
         "addressCountry": "Germany",
         "addressLocality": "Berlin",

test/resources/Message.1.json

@@ -1,8 +1,8 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "message",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "4706ef24-b631-5c20-91d1-3c627decca5a",
     "image": "icon ion-android-hand stapps-color-red-dark",
     "name": "Lösung für das Problem des Zurücksetzens der StApps-App gefunden",
     "message": "Wie bereits berichtet, klagten User über das Löschen ihres Stundenplans beim Update von Version 0.8.0 auf 0.8.1. Wir haben eine Lösung für das Problem gefunden und testen diese ausführlich bis zum Ende dieser Woche. Wenn alles glatt verläuft, dann kommt am Wochenende die fehlerbereinige Version 0.8.2 heraus.\n\n*(25.Okt 2016)*",

test/resources/Message.2.json

@@ -4,7 +4,7 @@
   ],
   "instance": {
     "type": "invalid-value-in-schema",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "cdb7059c-a1a2-5229-821d-434c345e2917",
     "image": "icon ion-android-hand stapps-color-red-dark",
     "name": "Lösung für das Problem des Zurücksetzens der StApps-App gefunden",
     "message": "Wie bereits berichtet, klagten User über das Löschen ihres Stundenplans beim Update von Version 0.8.0 auf 0.8.1. Wir haben eine Lösung für das Problem gefunden und testen diese ausführlich bis zum Ende dieser Woche. Wenn alles glatt verläuft, dann kommt am Wochenende die fehlerbereinige Version 0.8.2 heraus.\n\n*(25.Okt 2016)*",

test/resources/Message.3.json

@@ -1,9 +1,11 @@
 {
-  "errorNames": ["additionalProperties"],
-  "instance":  {
+  "errorNames": [
+    "additionalProperties"
+  ],
+  "instance": {
     "type": "message",
     "invalid-non-existing-key-in-schema": 1,
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "4706ef24-b631-5c20-91d1-3c627decca5a",
     "image": "icon ion-android-hand stapps-color-red-dark",
     "name": "Lösung für das Problem des Zurücksetzens der StApps-App gefunden",
     "message": "Wie bereits berichtet, klagten User über das Löschen ihres Stundenplans beim Update von Version 0.8.0 auf 0.8.1. Wir haben eine Lösung für das Problem gefunden und testen diese ausführlich bis zum Ende dieser Woche. Wenn alles glatt verläuft, dann kommt am Wochenende die fehlerbereinige Version 0.8.2 heraus.\n\n*(25.Okt 2016)*",

test/resources/Organization.json

@@ -1,8 +1,8 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "organization",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "20e48393-0d2b-5bdc-9d92-5e0dc1e2860e",
     "name": "Technische Universität Berlin",
     "origin": {
       "indexed": "2018-09-11T12:30:00Z",

test/resources/Person.1.json

@@ -1,8 +1,8 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "person",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "97044080-fdf3-5ec0-8734-c412ac2dde03",
     "givenName": "Michael",
     "familyName": "Joswig",
     "gender": "male",

test/resources/Person.2.json

@@ -1,8 +1,8 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "person",
-    "uid": "540862f3-ea30-5b8f-8678-56b4dc217140",
+    "uid": "eb516021-3b37-5358-baef-345a0e10da5b",
     "givenName": "Michael",
     "familyName": "Gradzielski",
     "gender": "male",

test/resources/Person.3.json

@@ -1,6 +1,6 @@
 {
   "errorNames": [],
-  "instance":  {
+  "instance": {
     "type": "person",
     "familyName": "Mustermann",
     "givenName": "Erika",
@@ -14,7 +14,7 @@
       "Leitung, Projektkoordination - Abteilung Lehre und Qualitätssicherung"
     ],
     "name": "Univ.-Prof'in Dr. Erika Mustermann",
-    "uid": "b22306bf-cbf3-54df-91a1-c08d8fd42e13",
+    "uid": "be34a419-e9e8-5de0-b998-dd1b19e7f451",
     "workLocations": [
       {
         "url": "http://www.fb03.uni-frankfurt.de/1234567",

test/resources/PointOfInterest.1.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "2e925b84-3c99-5df2-a289-62be7a4ae512",
+  "instance": {
+    "uid": "f5fe4d13-d56a-5770-b16e-78782841bf02",
     "name": "Validierer (UB)",
     "type": "point of interest",
     "categories": [

test/resources/PointOfInterest.2.json

@@ -1,7 +1,7 @@
 {
   "errorNames": [],
-  "instance":  {
-    "uid": "1cf75fa0-86dc-5704-8cb4-bd80cf02e640",
+  "instance": {
+    "uid": "5a5ca30a-1494-5707-9692-ff902e104c12",
     "name": "Drucker 1 (IG)",
     "type": "point of interest",
     "categories": [