+
+ // threshold corresponds to how many video the field should have to be returned
+ static getRandomSamples (threshold: number, count: number): Promise<string[]> {
+ const query = 'SELECT tag.name FROM tag ' +
+ 'INNER JOIN "videoTag" ON "videoTag"."tagId" = tag.id ' +
+ 'INNER JOIN video ON video.id = "videoTag"."videoId" ' +
+ 'WHERE video.privacy = $videoPrivacy AND video.state = $videoState ' +
+ 'GROUP BY tag.name HAVING COUNT(tag.name) >= $threshold ' +
+ 'ORDER BY random() ' +
+ 'LIMIT $count'
+
+ const options = {
+ bind: { threshold, count, videoPrivacy: VideoPrivacy.PUBLIC, videoState: VideoState.PUBLISHED },
+ type: QueryTypes.SELECT as QueryTypes.SELECT
+ }
+
+ return TagModel.sequelize.query<{ name: string }>(query, options)
+ .then(data => data.map(d => d.name))
+ }