feat: add catalog module

src/app/modules/catalog/catalog.provider.ts

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 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 {
+  SCCatalogWithoutReferences,
+  SCSearchFilter,
+  SCSearchResponse,
+  SCSemester,
+  SCThingType,
+} from '@openstapps/core';
+import {DataProvider} from '../data/data.provider';
+/**
+ * Service for providing catalog and semester data
+ */
+@Injectable({
+  providedIn: 'root',
+})
+export class CatalogProvider {
+  constructor(private readonly dataProvider: DataProvider) {}
+
+  /**
+   * Get news messages
+   * TODO: make dates sortable on the backend side and then adjust this method
+   *
+   * @param offset TODO
+   * @param superCatalog TODO
+   * @param semesterUID TODO
+   */
+  async getCatalogsWith(
+    offset?: number,
+    superCatalog?: SCCatalogWithoutReferences,
+    semesterUID?: string,
+  ): Promise<SCSearchResponse> {
+    const filters: SCSearchFilter[] = [
+      {
+        type: 'value',
+        arguments: {
+          field: 'type',
+          value: 'catalog',
+        },
+      },
+    ];
+
+    if (typeof semesterUID === 'string') {
+      filters.push({
+        type: 'value',
+        arguments: {
+          field: 'academicTerm.uid',
+          value: semesterUID,
+        },
+      });
+    }
+
+    if (typeof superCatalog?.uid === 'string') {
+      filters.push({
+        type: 'value',
+        arguments: {
+          field: 'superCatalog.uid',
+          value: superCatalog.uid,
+        },
+      });
+    } else {
+      filters.push({
+        type: 'value',
+        arguments: {
+          field: 'level',
+          value: '0',
+        },
+      });
+    }
+
+    return this.dataProvider.search({
+      filter: {
+        arguments: {
+          operation: 'and',
+          filters: filters,
+        },
+        type: 'boolean',
+      },
+      size: 40,
+      from: offset,
+      sort: [
+        {
+          type: 'ducet',
+          order: 'asc',
+          arguments: {
+            field: 'name',
+          },
+        },
+      ],
+    });
+  }
+
+  async getRelevantSemesters(): Promise<SCSemester[]> {
+    const response = await this.dataProvider.search({
+      filter: {
+        arguments: {
+          field: 'type',
+          value: SCThingType.Semester,
+        },
+        type: 'value',
+      },
+      size: 10,
+    });
+
+    return (response.data as SCSemester[]).sort((a, b) =>
+      b.startDate.localeCompare(a.startDate, 'en'),
+    );
+  }
+}