refactor: sort news by datePublished on backend

src/app/modules/news/news.provider.ts

@@ -15,7 +15,6 @@
 import {Injectable} from '@angular/core';
 import {SCMessage} from '@openstapps/core';
 import {DataProvider} from '../data/data.provider';
-
 /**
  * Service for providing news messages
  */
@@ -23,16 +22,15 @@ import {DataProvider} from '../data/data.provider';
   providedIn: 'root',
 })
 export class NewsProvider {
-  constructor(private dataProvider: DataProvider) {}
+  constructor(private dataProvider: DataProvider) {
+  }
 
   /**
    * Get news messages
-   * TODO: make dates sortable on the backend side and then adjust this method
    *
    * @param size How many messages/news to fetch
-   * @param sort If sort by date needs to be performed
    */
-  async getList(size: number, sort?: boolean): Promise<SCMessage[]> {
+  async getList(size: number): Promise<SCMessage[]> {
     const result = await this.dataProvider.search({
       filter: {
         type: 'value',
@@ -41,28 +39,16 @@ export class NewsProvider {
           value: 'message',
         },
       },
+      sort: [{
+        type: 'generic',
+        arguments: {
+          field: 'datePublished',
+        },
+        order: 'desc',
+      }],
       size: size,
     });
 
-    const news = result.data as SCMessage[];
-
-    if (sort) {
-      news.sort((a, b) => {
-        if (
-          typeof a.datePublished !== 'undefined' &&
-          typeof b.datePublished !== 'undefined'
-        ) {
-          return a.datePublished > b.datePublished
-            ? -1
-            : a.datePublished < b.datePublished
-            ? 1
-            : 0;
-        }
-
-        return 0;
-      });
-    }
-
-    return news;
+    return result.data as SCMessage[];
   }
 }