videoPlaylistId?: number
+ trendingAlgorithm?: string // best, hot, or any other algorithm implemented
trendingDays?: number
- hot?: boolean
user?: MUserAccountId
historyOfUser?: MUserId
attributes.push('COALESCE(SUM("videoView"."views"), 0) AS "score"')
group = 'GROUP BY "video"."id"'
- } else if (options.hot) {
+ } else if ([ 'best', 'hot' ].includes(options.trendingAlgorithm)) {
/**
* "Hotness" is a measure based on absolute view/comment/like/dislike numbers,
* with fixed weights only applied to their log values.
* justify a better score. However there are multiple ways to achieve that
* goal, which is left for later. Yes, this is a TODO :)
*
- * note: weights and base score are in number of half-days.
+ * notes:
+ * - weights and base score are in number of half-days.
+ * - all comments are counted, regardless of being written by the video author or not
* see https://github.com/reddit-archive/reddit/blob/master/r2/r2/lib/db/_sorts.pyx#L47-L58
*/
const weights = {
like: 3,
- dislike: 3,
+ dislike: -3,
view: 1 / 12,
- comment: 2 // a comment takes more time than a like to do, but can be done multiple times
+ comment: 2, // a comment takes more time than a like to do, but can be done multiple times
+ history: -2
}
joins.push('LEFT JOIN "videoComment" ON "video"."id" = "videoComment"."videoId"')
- attributes.push(
+ let attribute =
`LOG(GREATEST(1, "video"."likes" - 1)) * ${weights.like} ` + // likes (+)
- `- LOG(GREATEST(1, "video"."dislikes" - 1)) * ${weights.dislike} ` + // dislikes (-)
+ `+ LOG(GREATEST(1, "video"."dislikes" - 1)) * ${weights.dislike} ` + // dislikes (-)
`+ LOG("video"."views" + 1) * ${weights.view} ` + // views (+)
`+ LOG(GREATEST(1, COUNT(DISTINCT "videoComment"."id"))) * ${weights.comment} ` + // comments (+)
- '+ (SELECT EXTRACT(epoch FROM "video"."publishedAt") / 47000) ' + // base score (in number of half-days)
- 'AS "score"'
- )
+ '+ (SELECT EXTRACT(epoch FROM "video"."publishedAt") / 47000) ' // base score (in number of half-days)
+
+ if (options.trendingAlgorithm === 'best' && options.user) {
+ joins.push(
+ 'LEFT JOIN "userVideoHistory" ON "video"."id" = "userVideoHistory"."videoId" AND "userVideoHistory"."userId" = :bestUser'
+ )
+ replacements.bestUser = options.user.id
+
+ attribute += `+ POWER(COUNT(DISTINCT "userVideoHistory"."id"), 2.0) * ${weights.history} `
+ }
+
+ attribute += 'AS "score"'
+ attributes.push(attribute)
group = 'GROUP BY "video"."id"'
}
}
if (options.historyOfUser) {
- joins.push('INNER JOIN "userVideoHistory" on "video"."id" = "userVideoHistory"."videoId"')
+ joins.push('INNER JOIN "userVideoHistory" ON "video"."id" = "userVideoHistory"."videoId"')
and.push('"userVideoHistory"."userId" = :historyOfUser')
replacements.historyOfUser = options.historyOfUser.id
if (field.toLowerCase() === 'random') return 'ORDER BY RANDOM()'
- if ([ 'trending', 'hot' ].includes(field.toLowerCase())) { // Sort by aggregation
+ if ([ 'trending', 'hot', 'best' ].includes(field.toLowerCase())) { // Sort by aggregation
return `ORDER BY "score" ${direction}, "video"."views" ${direction}`
}
'"VideoFiles"."resolution"': '"VideoFiles.resolution"',
'"VideoFiles"."size"': '"VideoFiles.size"',
'"VideoFiles"."extname"': '"VideoFiles.extname"',
+ '"VideoFiles"."filename"': '"VideoFiles.filename"',
+ '"VideoFiles"."fileUrl"': '"VideoFiles.fileUrl"',
+ '"VideoFiles"."torrentFilename"': '"VideoFiles.torrentFilename"',
+ '"VideoFiles"."torrentUrl"': '"VideoFiles.torrentUrl"',
'"VideoFiles"."infoHash"': '"VideoFiles.infoHash"',
'"VideoFiles"."fps"': '"VideoFiles.fps"',
'"VideoFiles"."videoId"': '"VideoFiles.videoId"',
'"VideoStreamingPlaylists->VideoFiles"."resolution"': '"VideoStreamingPlaylists.VideoFiles.resolution"',
'"VideoStreamingPlaylists->VideoFiles"."size"': '"VideoStreamingPlaylists.VideoFiles.size"',
'"VideoStreamingPlaylists->VideoFiles"."extname"': '"VideoStreamingPlaylists.VideoFiles.extname"',
+ '"VideoStreamingPlaylists->VideoFiles"."filename"': '"VideoStreamingPlaylists.VideoFiles.filename"',
+ '"VideoStreamingPlaylists->VideoFiles"."fileUrl"': '"VideoStreamingPlaylists.VideoFiles.fileUrl"',
+ '"VideoStreamingPlaylists->VideoFiles"."torrentFilename"': '"VideoStreamingPlaylists.VideoFiles.torrentFilename"',
+ '"VideoStreamingPlaylists->VideoFiles"."torrentUrl"': '"VideoStreamingPlaylists.VideoFiles.torrentUrl"',
'"VideoStreamingPlaylists->VideoFiles"."infoHash"': '"VideoStreamingPlaylists.VideoFiles.infoHash"',
'"VideoStreamingPlaylists->VideoFiles"."fps"': '"VideoStreamingPlaylists.VideoFiles.fps"',
'"VideoStreamingPlaylists->VideoFiles"."videoStreamingPlaylistId"': '"VideoStreamingPlaylists.VideoFiles.videoStreamingPlaylistId"',