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Code Issues Releases Wiki Activity

add default trending page choice, revert comments count for hot strategy

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Rigel Kent 2021-01-26 01:53:13 +01:00 • committed by Chocobozzz
parent 28eeb811c4
commit 3da68f0a78
30 changed files with 258 additions and 105 deletions
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93
server/models/video/video-query-builder.ts
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@ -242,64 +242,49 @@ function buildListQuery (model: typeof Model, options: BuildVideosQueryOptions)
}
// We don't exclude results in this so if we do a count we don't need to add this complex clause
if (options.trendingDays && options.isCount !== true) {
const viewsGteDate = new Date(new Date().getTime() - (24 * 3600 * 1000) * options.trendingDays)
if (options.isCount !== true) {
if (options.trendingDays) {
const viewsGteDate = new Date(new Date().getTime() - (24 * 3600 * 1000) * options.trendingDays)
joins.push('LEFT JOIN "videoView" ON "video"."id" = "videoView"."videoId" AND "videoView"."startDate" >= :viewsGteDate')
replacements.viewsGteDate = viewsGteDate
joins.push('LEFT JOIN "videoView" ON "video"."id" = "videoView"."videoId" AND "videoView"."startDate" >= :viewsGteDate')
replacements.viewsGteDate = viewsGteDate
attributes.push('COALESCE(SUM("videoView"."views"), 0) AS "score"')
attributes.push('COALESCE(SUM("videoView"."views"), 0) AS "score"')
group = 'GROUP BY "video"."id"'
} else if (options.hot && options.isCount !== true) {
/**
* "Hotness" is a measure based on absolute view/comment/like/dislike numbers,
* with fixed weights only applied to their log values.
*
* This algorithm gives little chance for an old video to have a good score,
* for which recent spikes in interactions could be a sign of "hotness" and
* 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.
* see https://github.com/reddit-archive/reddit/blob/master/r2/r2/lib/db/_sorts.pyx#L47-L58
*/
const weights = {
like: 3,
dislike: 3,
view: 1 / 12,
comment: 2 // a comment takes more time than a like to do, but can be done multiple times
group = 'GROUP BY "video"."id"'
} else if (options.hot) {
/**
* "Hotness" is a measure based on absolute view/comment/like/dislike numbers,
* with fixed weights only applied to their log values.
*
* This algorithm gives little chance for an old video to have a good score,
* for which recent spikes in interactions could be a sign of "hotness" and
* 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.
* see https://github.com/reddit-archive/reddit/blob/master/r2/r2/lib/db/_sorts.pyx#L47-L58
*/
const weights = {
like: 3,
dislike: 3,
view: 1 / 12,
comment: 2 // a comment takes more time than a like to do, but can be done multiple times
}
joins.push('LEFT JOIN "videoComment" ON "video"."id" = "videoComment"."videoId"')
attributes.push(
`LOG(GREATEST(1, "video"."likes" - 1)) * ${weights.like} ` + // likes (+)
`- 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"'
)
group = 'GROUP BY "video"."id"'
}
cte.push( // TODO: exclude blocklisted comments
'"totalCommentsWithoutVideoAuthor" AS (' +
'SELECT "video"."id", ' +
'COUNT("replies"."id") - (' +
'SELECT COUNT("authorReplies"."id") ' +
'FROM "videoComment" AS "authorReplies" ' +
'LEFT JOIN "account" ON "account"."id" = "authorReplies"."accountId" ' +
'LEFT JOIN "videoChannel" ON "videoChannel"."accountId" = "account"."id" ' +
'WHERE "video"."channelId" = "videoChannel"."id" ' +
') as "value" ' +
'FROM "videoComment" AS "replies" ' +
'LEFT JOIN "video" ON "video"."id" = "replies"."videoId" ' +
'WHERE "replies"."videoId" = "video"."id" ' +
'GROUP BY "video"."id"' +
')'
)
joins.push('LEFT JOIN "totalCommentsWithoutVideoAuthor" ON "video"."id" = "totalCommentsWithoutVideoAuthor"."id"')
attributes.push(
`LOG(GREATEST(1, "video"."likes" - 1)) * ${weights.like} ` + // likes (+)
`- LOG(GREATEST(1, "video"."dislikes" - 1)) * ${weights.dislike} ` + // dislikes (-)
`+ LOG("video"."views" + 1) * ${weights.view} ` + // views (+)
`+ LOG(GREATEST(1, "totalCommentsWithoutVideoAuthor"."value")) * ${weights.comment} ` + // comments (+)
'+ (SELECT EXTRACT(epoch FROM "video"."publishedAt") / 47000) ' + // base score (in number of half-days)
'AS "score"'
)
group = 'GROUP BY "video"."id", "totalCommentsWithoutVideoAuthor"."value"'
}
if (options.historyOfUser) {