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Fix broken hot algorithm

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Chocobozzz 2021-03-03 13:52:58 +01:00
parent 534556052e
commit 5a22296bdb
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1 changed files with 7 additions and 6 deletions
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13
server/models/video/video-query-builder.ts
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@ -266,13 +266,14 @@ function buildListQuery (model: typeof Model, options: BuildVideosQueryOptions)
* - weights and base score are in number of half-days. * - weights and base score are in number of half-days.
* - all comments are counted, regardless of being written by the video author or not * - 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 * see https://github.com/reddit-archive/reddit/blob/master/r2/r2/lib/db/_sorts.pyx#L47-L58
* - we have less interactions than on reddit, so multiply weights by an arbitrary factor
*/ */
const weights = { const weights = {
like: 3, like: 3 * 50,
dislike: -3, dislike: -3 * 50,
view: 1 / 12, view: Math.floor((1 / 3) * 50),
comment: 2, // a comment takes more time than a like to do, but can be done multiple times comment: 2 * 50, // a comment takes more time than a like to do, but can be done multiple times
history: -2 history: -2 * 50
} }
joins.push('LEFT JOIN "videoComment" ON "video"."id" = "videoComment"."videoId"') joins.push('LEFT JOIN "videoComment" ON "video"."id" = "videoComment"."videoId"')
@ -282,7 +283,7 @@ function buildListQuery (model: typeof Model, options: BuildVideosQueryOptions)
`+ 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("video"."views" + 1) * ${weights.view} ` + // views (+)
`+ LOG(GREATEST(1, COUNT(DISTINCT "videoComment"."id"))) * ${weights.comment} ` + // comments (+) `+ LOG(GREATEST(1, COUNT(DISTINCT "videoComment"."id"))) * ${weights.comment} ` + // comments (+)
'+ (SELECT EXTRACT(epoch FROM "video"."publishedAt") / 47000) ' // base score (in number of half-days) '+ (SELECT (EXTRACT(epoch FROM "video"."publishedAt") - 1446156582) / 47000) ' // base score (in number of half-days)
if (options.trendingAlgorithm === 'best' && options.user) { if (options.trendingAlgorithm === 'best' && options.user) {
joins.push( joins.push(