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/caption/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 { remove } from 'fs-extra'
  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     if (!instance.Video) {
  79       instance.Video = await instance.$get('Video') as VideoModel
  80     }
  81
  82     if (instance.isOwned()) {
  83       logger.info('Removing captions %s of video %s.', instance.Video.uuid, instance.language)
  84
  85       try {
  86         await instance.removeCaptionFile()
  87       } catch (err) {
  88         logger.error('Cannot remove caption file of video %s.', instance.Video.uuid)
  89       }
  90     }
  91
  92     return undefined
  93   }
  94
  95   static loadByVideoIdAndLanguage (videoId: string | number, language: string) {
  96     const videoInclude = {
  97       model: VideoModel.unscoped(),
  98       attributes: [ 'id', 'remote', 'uuid' ],
  99       where: { }
 100     }
 101
 102     if (typeof videoId === 'string') videoInclude.where['uuid'] = videoId
 103     else videoInclude.where['id'] = videoId
 104
 105     const query = {
 106       where: {
 107         language
 108       },
 109       include: [
 110         videoInclude
 111       ]
 112     }
 113
 114     return VideoCaptionModel.findOne(query)
 115   }
 116
 117   static insertOrReplaceLanguage (videoId: number, language: string, transaction: Sequelize.Transaction) {
 118     const values = {
 119       videoId,
 120       language
 121     }
 122
 123     return VideoCaptionModel.upsert<VideoCaptionModel>(values, { transaction, returning: true })
 124       .then(([ caption ]) => caption)
 125   }
 126
 127   static listVideoCaptions (videoId: number) {
 128     const query = {
 129       order: [ [ 'language', 'ASC' ] ],
 130       where: {
 131         videoId
 132       }
 133     }
 134
 135     return VideoCaptionModel.scope(ScopeNames.WITH_VIDEO_UUID_AND_REMOTE).findAll(query)
 136   }
 137
 138   static getLanguageLabel (language: string) {
 139     return VIDEO_LANGUAGES[language] || 'Unknown'
 140   }
 141
 142   static deleteAllCaptionsOfRemoteVideo (videoId: number, transaction: Sequelize.Transaction) {
 143     const query = {
 144       where: {
 145         videoId
 146       },
 147       transaction
 148     }
 149
 150     return VideoCaptionModel.destroy(query)
 151   }
 152
 153   isOwned () {
 154     return this.Video.remote === false
 155   }
 156
 157   toFormattedJSON (): VideoCaption {
 158     return {
 159       language: {
 160         id: this.language,
 161         label: VideoCaptionModel.getLanguageLabel(this.language)
 162       },
 163       captionPath: this.getCaptionStaticPath()
 164     }
 165   }
 166
 167   getCaptionStaticPath () {
 168     return join(STATIC_PATHS.VIDEO_CAPTIONS, this.getCaptionName())
 169   }
 170
 171   getCaptionName () {
 172     return `${this.Video.uuid}-${this.language}.vtt`
 173   }
 174
 175   removeCaptionFile () {
 176     return remove(CONFIG.STORAGE.CAPTIONS_DIR + this.getCaptionName())
 177   }
 178 }