-import * as Bluebird from 'bluebird'
-import { Transaction } from 'sequelize'
+import { col, fn, QueryTypes, Transaction } from 'sequelize'
import { AllowNull, BelongsToMany, Column, CreatedAt, Is, Model, Table, UpdatedAt } from 'sequelize-typescript'
+import { MTag } from '@server/types/models'
+import { VideoPrivacy, VideoState } from '../../../shared/models/videos'
import { isVideoTagValid } from '../../helpers/custom-validators/videos'
import { throwIfNotValid } from '../utils'
import { VideoModel } from './video'
{
fields: [ 'name' ],
unique: true
+ },
+ {
+ name: 'tag_lower_name',
+ fields: [ fn('lower', col('name')) ] as any // FIXME: typings
}
]
})
-export class TagModel extends Model<TagModel> {
+export class TagModel extends Model {
@AllowNull(false)
@Is('VideoTag', value => throwIfNotValid(value, isVideoTagValid, 'tag'))
})
Videos: VideoModel[]
- static findOrCreateTags (tags: string[], transaction: Transaction) {
- if (tags === null) return []
+ static findOrCreateTags (tags: string[], transaction: Transaction): Promise<MTag[]> {
+ if (tags === null) return Promise.resolve([])
- const tasks: Bluebird<TagModel>[] = []
+ const tasks: Promise<MTag>[] = []
tags.forEach(tag => {
const query = {
where: {
},
defaults: {
name: tag
- }
+ },
+ transaction
}
- if (transaction) query['transaction'] = transaction
-
- const promise = TagModel.findOrCreate(query)
+ const promise = TagModel.findOrCreate<MTag>(query)
.then(([ tagInstance ]) => tagInstance)
tasks.push(promise)
})
return Promise.all(tasks)
}
+
+ // 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))
+ }
}