refactor: tidy structure of source files

Fixes #79

src/things/diff.ts

@@ -0,0 +1,109 @@
+/*
+ * 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 * as jsonpatch from 'json-patch';
+import {SCMetaTranslations} from '../general/i18n';
+import {SCISO8601Date} from '../general/time';
+import {SCThingsWithoutDiff} from '../meta';
+import {SCThing, SCThingMeta, SCThingType, SCThingWithoutReferences} from './abstract/thing';
+
+/**
+ * A diff without references
+ */
+export interface SCDiffWithoutReferences
+  extends SCThingWithoutReferences {
+  /**
+   * Action of the diff
+   */
+  action: 'changed' | 'removed';
+
+  /**
+   * Diff patch. Only when action === 'changed'
+   */
+  changes?: jsonpatch.OpPatch[];
+
+  /**
+   * Creation date of the diff.
+   */
+  dateCreated: SCISO8601Date;
+
+  /**
+   * Type of a diff
+   */
+  type: SCThingType.Diff;
+}
+
+/**
+ * A diff
+ *
+ * @validatable
+ * @indexable
+ */
+export interface SCDiff
+  extends SCDiffWithoutReferences, SCThing {
+  /**
+   * Original object the diff was generated on
+   */
+  object: SCThingsWithoutDiff;
+
+  /**
+   * Type of a diff
+   */
+  type: SCThingType.Diff;
+}
+
+/**
+ * Meta information about a diff
+ */
+export class SCDiffMeta
+  extends SCThingMeta
+  implements SCMetaTranslations<SCDiff> {
+  /**
+   * Translations of fields
+   */
+  fieldTranslations = {
+    de: {
+      ...SCThingMeta.getInstance<SCThingMeta>().fieldTranslations.de,
+      action: 'Aktion',
+      changes: 'Änderungen',
+      dateCreated: 'Erstellungsdatum',
+      object: 'Objekt',
+    },
+    en: {
+      ...SCThingMeta.getInstance<SCThingMeta>().fieldTranslations.en,
+      action: 'action',
+      changes: 'changes',
+      dateCreated: 'date created',
+      object: 'object',
+    },
+  };
+
+  /**
+   * Translations of values of fields
+   */
+  fieldValueTranslations = {
+    de: {
+      ...SCThingMeta.getInstance().fieldValueTranslations.de,
+      action: {
+        'changed': 'geändert',
+        'removed': 'gelöscht',
+      },
+      type: 'Unterschied',
+    },
+    en: {
+      ...SCThingMeta.getInstance().fieldValueTranslations.en,
+      type: SCThingType.Diff,
+    },
+  };
+}