From 36bf17e3236a555e6d1193466141be880b280db9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Wieland=20Sch=C3=B6bl?=
 <wieland.schoebl@campus.tu-berlin.de>
Date: Tue, 20 Aug 2019 14:39:24 +0200
Subject: [PATCH] feat: add support for @filterable tag

---
 src/mapping.ts                       | 17 +++++++++++++++--
 src/mappings/definitions/fieldmap.ts |  9 ++++++++-
 src/mappings/mapping-definitions.ts  |  4 ++++
 3 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/src/mapping.ts b/src/mapping.ts
index e82e4cb8..db2d97e0 100644
--- a/src/mapping.ts
+++ b/src/mapping.ts
@@ -25,7 +25,7 @@ import {
   Type, TypeParameterType,
   UnionType,
 } from 'typedoc/dist/lib/models';
-import {fieldmap} from './mappings/definitions/fieldmap';
+import {fieldmap, filterableMap, filterableTagName} from './mappings/definitions/fieldmap';
 import {premaps} from './mappings/definitions/premap';
 import {settings} from './mappings/definitions/settings';
 import {dynamicTypes, ElasticsearchDataType, typemap} from './mappings/definitions/typemap';
@@ -335,7 +335,6 @@ function readFieldTags(prev: ElasticsearchValue, path: string, tags?: CommentTag
             prev.fields = {};
           }
           if (tag.text.trim() === '') {
-            // merge the fields
             prev.fields = {...prev.fields, ...fieldmap[tag.tagName].default};
           } else if (typeof fieldmap[tag.tagName][tag.text.trim()] !== 'undefined') {
             // merge the fields
@@ -343,6 +342,20 @@ function readFieldTags(prev: ElasticsearchValue, path: string, tags?: CommentTag
           } else if (!fieldmap[tag.tagName].ignore.includes(tag.text.trim())) {
             composeErrorMessage(path, 'tag', tag.tagName, `Not implemented tag param "${tag.text.trim()}"`);
           }
+        } else if (tag.tagName === filterableTagName) {
+          if (typeof prev.fields === 'undefined') {
+            prev.fields = {};
+          }
+          if ('type' in prev) {
+            const type = filterableMap[prev.type];
+            if (typeof type !== 'undefined') {
+              prev.fields = {...prev.fields, ...{raw: {type: type}}};
+            } else {
+              composeErrorMessage(path, 'tag', tag.tagName, `Not implemented for ${prev.type}`);
+            }
+          } else {
+            composeErrorMessage(path, 'tag', tag.tagName, 'Not applicable for object types');
+          }
         } else {
           composeErrorMessage(path, 'tag', tag.tagName, `Not implemented tag`);
         }
diff --git a/src/mappings/definitions/fieldmap.ts b/src/mappings/definitions/fieldmap.ts
index 9151b775..7937f1bf 100644
--- a/src/mappings/definitions/fieldmap.ts
+++ b/src/mappings/definitions/fieldmap.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 {ElasticsearchFieldmap} from '../mapping-definitions';
+import {ElasticsearchFieldmap, ElasticsearchFilterableMap} from '../mapping-definitions';
 import {ElasticsearchDataType} from './typemap';
 
 export enum analyzers {
@@ -48,3 +48,10 @@ export const fieldmap: ElasticsearchFieldmap = {
     ignore: ['price'],
   },
 };
+
+export const filterableTagName = 'filterable';
+
+export const filterableMap: ElasticsearchFilterableMap = {
+  date: ElasticsearchDataType.keyword,
+  text: ElasticsearchDataType.keyword,
+};
diff --git a/src/mappings/mapping-definitions.ts b/src/mappings/mapping-definitions.ts
index 4f0635ed..2fda98b9 100644
--- a/src/mappings/mapping-definitions.ts
+++ b/src/mappings/mapping-definitions.ts
@@ -109,6 +109,10 @@ export interface ElasticsearchDynamicTemplate {
   };
 }
 
+export interface ElasticsearchFilterableMap {
+  [name: string]: ElasticsearchDataType;
+}
+
 /**
  * The Fieldmap contains all tag names for fields and the corresponding fields
  *