#165: first attempt

src/domain/post/data/retrieveByCreators.ts

@@ -1,5 +1,5 @@
 
-import database, { RecordQuery, RecordSort, SortDirections } from '^/integrations/database/module';
+import database, { RecordQuery } from '^/integrations/database/module';
 
 import { RECORD_TYPE } from '../definitions/constants';
 import type PostData from './PostData';
@@ -8,9 +8,9 @@ import createData from './mapRecord';
 export default async function retrieveByCreators(creatorIds: string[]): Promise<PostData[]>
 {
     const query: RecordQuery = { creatorId: { 'IN': creatorIds } };
-    const sort: RecordSort = { createdAt: SortDirections.DESCENDING };
+    //const sort: RecordSort = { createdAt: SortDirections.DESCENDING };
 
-    const records = await database.searchRecords(RECORD_TYPE, query, undefined, sort);
+    const records = await database.searchRecords(RECORD_TYPE, query, undefined, undefined);
 
     const dataList = records.map(createData);
 

src/domain/post/getTimeline.ts

@@ -1,17 +1,42 @@
 
 import type Requester from '../authentication/Requester';
 import retrieveFollowerData from '../relation/data/retrieveByFollower';
+import SortOptions from '../relation/definitions/SortOptions';
+import PostData from './data/PostData';
 import retrieveByCreators from './data/retrieveByCreators';
 import type PostView from './view/PostView';
 import createView from './view/createView';
 
-export default async function getTimeline(requester: Requester): Promise<PostView[]>
+export default async function getTimeline(requester: Requester, sortOption: SortOptions): Promise<PostView[]>
 {
     const followerData = await retrieveFollowerData(requester.id);
     const followingIds = followerData.map(data => data.followingId);
     const postData = await retrieveByCreators(followingIds);
 
+    sortOption === SortOptions.RECENT
+        ? postData.sort(sortRecent)
+        : postData.sort(sortPopular);
+
     const views = postData.map(item => createView(requester, item));
 
     return Promise.all(views);
 }
+
+function sortRecent(a: PostData, b: PostData)
+{
+    if (a.createdAt > b.createdAt) return 1;
+    if (a.createdAt < b.createdAt) return -1;
+
+    return 0;
+}
+
+function sortPopular(a: PostData, b: PostData)
+{
+    const popularityA = a.reactionCount * 2 + a.ratingCount;
+    const popularityB = b.reactionCount * 2 + b.ratingCount;
+
+    if (popularityA > popularityB) return -1;
+    if (popularityA < popularityB) return 1;
+
+    return 0;
+}