feat: news module

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

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2020-2021 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 {Injectable} from '@angular/core';
+import {SCMessage} from '@openstapps/core';
+import {DataProvider} from '../data/data.provider';
+/**
+ * Service for providing news messages
+ */
+@Injectable({
+  providedIn: 'root',
+})
+export class NewsProvider {
+  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[]> {
+    const result = await this.dataProvider.search({
+      filter: {
+        type: 'value',
+        arguments: {
+          field: 'type',
+          value: 'message',
+        },
+      },
+      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;
+  }
+}