server/models/video/video-caption.ts

   1 import * as Sequelize from 'sequelize'
   2 import {
   3   AllowNull,
   4   BeforeDestroy,
   5   BelongsTo,
   6   Column,
   7   CreatedAt,
   8   ForeignKey,
   9   Is,
  10   Model,
  11   Scopes,
  12   Table,
  13   UpdatedAt
  14 } from 'sequelize-typescript'
  15 import { throwIfNotValid } from '../utils'
  16 import { VideoModel } from './video'
  17 import { isVideoCaptionLanguageValid } from '../../helpers/custom-validators/video-captions'
  18 import { VideoCaption } from '../../../shared/models/videos/video-caption.model'
  19 import { CONFIG, STATIC_PATHS, VIDEO_LANGUAGES } from '../../initializers'
  20 import { join } from 'path'
  21 import { logger } from '../../helpers/logger'
  22 import { unlinkPromise } from '../../helpers/core-utils'
  23
  24 export enum ScopeNames {
  25   WITH_VIDEO_UUID_AND_REMOTE = 'WITH_VIDEO_UUID_AND_REMOTE'
  26 }
  27
  28 @Scopes({
  29   [ScopeNames.WITH_VIDEO_UUID_AND_REMOTE]: {
  30     include: [
  31       {
  32         attributes: [ 'uuid', 'remote' ],
  33         model: () => VideoModel.unscoped(),
  34         required: true
  35       }
  36     ]
  37   }
  38 })
  39
  40 @Table({
  41   tableName: 'videoCaption',
  42   indexes: [
  43     {
  44       fields: [ 'videoId' ]
  45     },
  46     {
  47       fields: [ 'videoId', 'language' ],
  48       unique: true
  49     }
  50   ]
  51 })
  52 export class VideoCaptionModel extends Model<VideoCaptionModel> {
  53   @CreatedAt
  54   createdAt: Date
  55
  56   @UpdatedAt
  57   updatedAt: Date
  58
  59   @AllowNull(false)
  60   @Is('VideoCaptionLanguage', value => throwIfNotValid(value, isVideoCaptionLanguageValid, 'language'))
  61   @Column
  62   language: string
  63
  64   @ForeignKey(() => VideoModel)
  65   @Column
  66   videoId: number
  67
  68   @BelongsTo(() => VideoModel, {
  69     foreignKey: {
  70       allowNull: false
  71     },
  72     onDelete: 'CASCADE'
  73   })
  74   Video: VideoModel
  75
  76   @BeforeDestroy
  77   static async removeFiles (instance: VideoCaptionModel) {
  78
  79     if (instance.isOwned()) {
  80       if (!instance.Video) {
  81         instance.Video = await instance.$get('Video') as VideoModel
  82       }
  83
  84       logger.debug('Removing captions %s of video %s.', instance.Video.uuid, instance.language)
  85       return instance.removeCaptionFile()
  86     }
  87
  88     return undefined
  89   }
  90
  91   static loadByVideoIdAndLanguage (videoId: string | number, language: string) {
  92     const videoInclude = {
  93       model: VideoModel.unscoped(),
  94       attributes: [ 'id', 'remote', 'uuid' ],
  95       where: { }
  96     }
  97
  98     if (typeof videoId === 'string') videoInclude.where['uuid'] = videoId
  99     else videoInclude.where['id'] = videoId
 100
 101     const query = {
 102       where: {
 103         language
 104       },
 105       include: [
 106         videoInclude
 107       ]
 108     }
 109
 110     return VideoCaptionModel.findOne(query)
 111   }
 112
 113   static insertOrReplaceLanguage (videoId: number, language: string, transaction: Sequelize.Transaction) {
 114     const values = {
 115       videoId,
 116       language
 117     }
 118
 119     return VideoCaptionModel.upsert(values, { transaction })
 120   }
 121
 122   static listVideoCaptions (videoId: number) {
 123     const query = {
 124       order: [ [ 'language', 'ASC' ] ],
 125       where: {
 126         videoId
 127       }
 128     }
 129
 130     return VideoCaptionModel.scope(ScopeNames.WITH_VIDEO_UUID_AND_REMOTE).findAll(query)
 131   }
 132
 133   static getLanguageLabel (language: string) {
 134     return VIDEO_LANGUAGES[language] || 'Unknown'
 135   }
 136
 137   static deleteAllCaptionsOfRemoteVideo (videoId: number, transaction: Sequelize.Transaction) {
 138     const query = {
 139       where: {
 140         videoId
 141       },
 142       transaction
 143     }
 144
 145     return VideoCaptionModel.destroy(query)
 146   }
 147
 148   isOwned () {
 149     return this.Video.remote === false
 150   }
 151
 152   toFormattedJSON (): VideoCaption {
 153     return {
 154       language: {
 155         id: this.language,
 156         label: VideoCaptionModel.getLanguageLabel(this.language)
 157       },
 158       captionPath: this.getCaptionStaticPath()
 159     }
 160   }
 161
 162   getCaptionStaticPath () {
 163     return join(STATIC_PATHS.VIDEO_CAPTIONS, this.getCaptionName())
 164   }
 165
 166   getCaptionName () {
 167     return `${this.Video.uuid}-${this.language}.vtt`
 168   }
 169
 170   removeCaptionFile () {
 171     return unlinkPromise(CONFIG.STORAGE.CAPTIONS_DIR + this.getCaptionName())
 172   }
 173 }