🧹 drop the track collection

app/models/track.js

@@ -1,40 +1,5 @@
 // @ts-check
 
-/**
- * track model
- * - maintained by post model: updateByEid()
- * - read by hot tracks controller: getHotTracksFromDb()
- * - read by notif template: getHotTracksFromDb()
- * @author adrienjoly, whyd
- **/
-
-/*
-  - - - structure of a track record - - -
-  _id: automatically-assigned identifier (ObjectId)
-  eId: uri used to identify and embed this track's stream from its source
-  img: url of the image thumb of that track
-  name: name of the track (combines artist and title) // TODO: which version is stored in case of conflict?
-  score: the higher this number, the higher this track will rank in the hot tracks. computed from various metrics.
-  nbR: number of posts/reposts within the HOT_TRACK_TIME_WINDOW period
-  nbL: number of likes
-  nbP: number of plays
-  prev: score value at last snapshot (used to compute trends)
-  meta: {art, tit, dur, c, t}: concise metadata extracted from 3rd-parties (artist name, track title, duration, confidence 0<1, timestamp)
-  alt: [eId1, eId2...]: array of alternative souces for that track (cross-platform mappings)
-
-  - - - old fields - - -
-  prevRank: used to store the rank/index of that record in the track collection, before the score was updated
-  nbFreshPosts: used to store the number of posts within the HOT_TRACK_TIME_WINDOW
-  nbTotalPosts: duplicate of nbR
-  nbTotalLikes: duplicate of nbL
-  nbTotalPlays: duplicate of nbP
-
-  - - - notice - - -
-  since the periodic call of refreshHotTracksCache() was removed:
-  -> the prevRank is never updated => no movement information will be displayed on openwhyd.org/hot
-  -> the score of a track will only be updated on a (re-)post, like, or play operation on that track
-*/
-
 const config = require('./config.js');
 const mongodb = require('./mongodb.js');
 const feature = require('../features/hot-tracks.js');

config/initdb.js

@@ -19,7 +19,7 @@ await Promise.all([
   db.createCollection('follow').catch(tolerateError('already exists')),
   db.createCollection('post').catch(tolerateError('already exists')),
   db.createCollection('activity').catch(tolerateError('already exists')),
-  db.createCollection('track').catch(tolerateError('already exists')),
+  db.dropCollection('track').catch(tolerateError('ns not found')),
   db.createCollection('comment').catch(tolerateError('already exists')),
 ]);
 
@@ -64,10 +64,6 @@ await db
   .collection('activity')
   .createIndex({ 'like.pId': 1 }, { sparse: true });
 
-// print('indexing track collection...');
-await db.collection('track').createIndex({ eId: 1 });
-await db.collection('track').createIndex({ score: 1 });
-
 // print('indexing comment collection...');
 await db.collection('comment').createIndex({ pId: 1 });