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1 | import * as Bluebird from 'bluebird' | |
2 | import { QueryTypes, Transaction } from 'sequelize' | |
3 | import { AllowNull, BelongsToMany, Column, CreatedAt, Is, Model, Table, UpdatedAt } from 'sequelize-typescript' | |
4 | import { isVideoTagValid } from '../../helpers/custom-validators/videos' | |
5 | import { throwIfNotValid } from '../utils' | |
6 | import { VideoModel } from './video' | |
7 | import { VideoTagModel } from './video-tag' | |
8 | import { VideoPrivacy, VideoState } from '../../../shared/models/videos' | |
9 | ||
10 | @Table({ | |
11 | tableName: 'tag', | |
12 | timestamps: false, | |
13 | indexes: [ | |
14 | { | |
15 | fields: [ 'name' ], | |
16 | unique: true | |
17 | } | |
18 | ] | |
19 | }) | |
20 | export class TagModel extends Model<TagModel> { | |
21 | ||
22 | @AllowNull(false) | |
23 | @Is('VideoTag', value => throwIfNotValid(value, isVideoTagValid, 'tag')) | |
24 | @Column | |
25 | name: string | |
26 | ||
27 | @CreatedAt | |
28 | createdAt: Date | |
29 | ||
30 | @UpdatedAt | |
31 | updatedAt: Date | |
32 | ||
33 | @BelongsToMany(() => VideoModel, { | |
34 | foreignKey: 'tagId', | |
35 | through: () => VideoTagModel, | |
36 | onDelete: 'CASCADE' | |
37 | }) | |
38 | Videos: VideoModel[] | |
39 | ||
40 | static findOrCreateTags (tags: string[], transaction: Transaction) { | |
41 | if (tags === null) return [] | |
42 | ||
43 | const tasks: Bluebird<TagModel>[] = [] | |
44 | tags.forEach(tag => { | |
45 | const query = { | |
46 | where: { | |
47 | name: tag | |
48 | }, | |
49 | defaults: { | |
50 | name: tag | |
51 | }, | |
52 | transaction | |
53 | } | |
54 | ||
55 | const promise = TagModel.findOrCreate(query) | |
56 | .then(([ tagInstance ]) => tagInstance) | |
57 | tasks.push(promise) | |
58 | }) | |
59 | ||
60 | return Promise.all(tasks) | |
61 | } | |
62 | ||
63 | // threshold corresponds to how many video the field should have to be returned | |
64 | static getRandomSamples (threshold: number, count: number): Bluebird<string[]> { | |
65 | const query = 'SELECT tag.name FROM tag ' + | |
66 | 'INNER JOIN "videoTag" ON "videoTag"."tagId" = tag.id ' + | |
67 | 'INNER JOIN video ON video.id = "videoTag"."videoId" ' + | |
68 | 'WHERE video.privacy = $videoPrivacy AND video.state = $videoState ' + | |
69 | 'GROUP BY tag.name HAVING COUNT(tag.name) >= $threshold ' + | |
70 | 'ORDER BY random() ' + | |
71 | 'LIMIT $count' | |
72 | ||
73 | const options = { | |
74 | bind: { threshold, count, videoPrivacy: VideoPrivacy.PUBLIC, videoState: VideoState.PUBLISHED }, | |
75 | type: QueryTypes.SELECT as QueryTypes.SELECT | |
76 | } | |
77 | ||
78 | return TagModel.sequelize.query<{ name: string }>(query, options) | |
79 | .then(data => data.map(d => d.name)) | |
80 | } | |
81 | } |