Video model refractoring -> use mongoose api

1 files changed, 314 insertions, 0 deletions

diff --git a/server/models/video.js b/server/models/video.js
new file mode 100644
index 000000000..8b14e9b35
--- /dev/null
+++ b/server/models/video.js
@@ -0,0 +1,314 @@
+'use strict'
+
+const async = require('async')
+const config = require('config')
+const ffmpeg = require('fluent-ffmpeg')
+const fs = require('fs')
+const pathUtils = require('path')
+const mongoose = require('mongoose')
+
+const constants = require('../initializers/constants')
+const customValidators = require('../helpers/customValidators')
+const logger = require('../helpers/logger')
+const utils = require('../helpers/utils')
+const webtorrent = require('../lib/webtorrent')
+
+const http = config.get('webserver.https') === true ? 'https' : 'http'
+const host = config.get('webserver.host')
+const port = config.get('webserver.port')
+const uploadsDir = pathUtils.join(__dirname, '..', '..', config.get('storage.uploads'))
+const thumbnailsDir = pathUtils.join(__dirname, '..', '..', config.get('storage.thumbnails'))
+
+// ---------------------------------------------------------------------------
+
+// TODO: add indexes on searchable columns
+const VideoSchema = mongoose.Schema({
+  name: String,
+  namePath: String,
+  description: String,
+  magnetUri: String,
+  podUrl: String,
+  author: String,
+  duration: Number,
+  thumbnail: String,
+  tags: [ String ],
+  createdDate: {
+    type: Date,
+    default: Date.now
+  }
+})
+
+VideoSchema.path('name').validate(customValidators.isVideoNameValid)
+VideoSchema.path('description').validate(customValidators.isVideoDescriptionValid)
+VideoSchema.path('magnetUri').validate(customValidators.isVideoMagnetUriValid)
+VideoSchema.path('podUrl').validate(customValidators.isVideoPodUrlValid)
+VideoSchema.path('author').validate(customValidators.isVideoAuthorValid)
+VideoSchema.path('duration').validate(customValidators.isVideoDurationValid)
+// The tumbnail can be the path or the data in base 64
+// The pre save hook will convert the base 64 data in a file on disk and replace the thumbnail key by the filename
+VideoSchema.path('thumbnail').validate(function (value) {
+  return customValidators.isVideoThumbnailValid(value) || customValidators.isVideoThumbnail64Valid(value)
+})
+VideoSchema.path('tags').validate(customValidators.isVideoTagsValid)
+
+VideoSchema.methods = {
+  isOwned: isOwned,
+  toFormatedJSON: toFormatedJSON,
+  toRemoteJSON: toRemoteJSON
+}
+
+VideoSchema.statics = {
+  getDurationFromFile: getDurationFromFile,
+  list: list,
+  listByUrlAndMagnet: listByUrlAndMagnet,
+  listByUrls: listByUrls,
+  listOwned: listOwned,
+  listRemotes: listRemotes,
+  load: load,
+  search: search,
+  seedAllExisting: seedAllExisting
+}
+
+VideoSchema.pre('remove', function (next) {
+  const video = this
+  const tasks = []
+
+  tasks.push(
+    function (callback) {
+      removeThumbnail(video, callback)
+    }
+  )
+
+  if (video.isOwned()) {
+    tasks.push(
+      function (callback) {
+        removeFile(video, callback)
+      },
+      function (callback) {
+        removeTorrent(video, callback)
+      }
+    )
+  }
+
+  async.parallel(tasks, next)
+})
+
+VideoSchema.pre('save', function (next) {
+  const video = this
+  const tasks = []
+
+  if (video.isOwned()) {
+    const videoPath = pathUtils.join(uploadsDir, video.namePath)
+    this.podUrl = http + '://' + host + ':' + port
+
+    tasks.push(
+      function (callback) {
+        seed(videoPath, callback)
+      },
+      function (callback) {
+        createThumbnail(videoPath, callback)
+      }
+    )
+
+    async.parallel(tasks, function (err, results) {
+      if (err) return next(err)
+
+      video.magnetUri = results[0].magnetURI
+      video.thumbnail = results[1]
+
+      return next()
+    })
+  } else {
+    generateThumbnailFromBase64(video.thumbnail, function (err, thumbnailName) {
+      if (err) return next(err)
+
+      video.thumbnail = thumbnailName
+
+      return next()
+    })
+  }
+})
+
+mongoose.model('Video', VideoSchema)
+
+// ------------------------------ METHODS ------------------------------
+
+function isOwned () {
+  return this.namePath !== null
+}
+
+function toFormatedJSON () {
+  const json = {
+    id: this._id,
+    name: this.name,
+    description: this.description,
+    podUrl: this.podUrl.replace(/^https?:\/\//, ''),
+    isLocal: this.isOwned(),
+    magnetUri: this.magnetUri,
+    author: this.author,
+    duration: this.duration,
+    tags: this.tags,
+    thumbnailPath: constants.THUMBNAILS_STATIC_PATH + '/' + this.thumbnail,
+    createdDate: this.createdDate
+  }
+
+  return json
+}
+
+function toRemoteJSON (callback) {
+  const self = this
+
+  // Convert thumbnail to base64
+  fs.readFile(pathUtils.join(thumbnailsDir, this.thumbnail), function (err, thumbnailData) {
+    if (err) {
+      logger.error('Cannot read the thumbnail of the video')
+      return callback(err)
+    }
+
+    const remoteVideo = {
+      name: self.name,
+      description: self.description,
+      magnetUri: self.magnetUri,
+      namePath: null,
+      author: self.author,
+      duration: self.duration,
+      thumbnailBase64: new Buffer(thumbnailData).toString('base64'),
+      tags: self.tags,
+      createdDate: self.createdDate,
+      podUrl: self.podUrl
+    }
+
+    return callback(null, remoteVideo)
+  })
+}
+
+// ------------------------------ STATICS ------------------------------
+
+function getDurationFromFile (videoPath, callback) {
+  ffmpeg.ffprobe(videoPath, function (err, metadata) {
+    if (err) return callback(err)
+
+    return callback(null, Math.floor(metadata.format.duration))
+  })
+}
+
+function list (start, count, sort, callback) {
+  const query = {}
+  return findWithCount.call(this, query, start, count, sort, callback)
+}
+
+function listByUrlAndMagnet (fromUrl, magnetUri, callback) {
+  this.find({ podUrl: fromUrl, magnetUri: magnetUri }, callback)
+}
+
+function listByUrls (fromUrls, callback) {
+  this.find({ podUrl: { $in: fromUrls } }, callback)
+}
+
+function listOwned (callback) {
+  // If namePath is not null this is *our* video
+  this.find({ namePath: { $ne: null } }, callback)
+}
+
+function listRemotes (callback) {
+  this.find({ namePath: null }, callback)
+}
+
+function load (id, callback) {
+  this.findById(id, callback)
+}
+
+function search (value, field, start, count, sort, callback) {
+  const query = {}
+  // Make an exact search with the magnet
+  if (field === 'magnetUri' || field === 'tags') {
+    query[field] = value
+  } else {
+    query[field] = new RegExp(value)
+  }
+
+  findWithCount.call(this, query, start, count, sort, callback)
+}
+
+// TODO
+function seedAllExisting () {
+
+}
+
+// ---------------------------------------------------------------------------
+
+function findWithCount (query, start, count, sort, callback) {
+  const self = this
+
+  async.parallel([
+    function (asyncCallback) {
+      self.find(query).skip(start).limit(start + count).sort(sort).exec(asyncCallback)
+    },
+    function (asyncCallback) {
+      self.count(query, asyncCallback)
+    }
+  ], function (err, results) {
+    if (err) return callback(err)
+
+    const videos = results[0]
+    const totalVideos = results[1]
+    return callback(null, videos, totalVideos)
+  })
+}
+
+function removeThumbnail (video, callback) {
+  fs.unlink(thumbnailsDir + video.thumbnail, callback)
+}
+
+function removeFile (video, callback) {
+  fs.unlink(uploadsDir + video.namePath, callback)
+}
+
+// Maybe the torrent is not seeded, but we catch the error to don't stop the removing process
+function removeTorrent (video, callback) {
+  try {
+    webtorrent.remove(video.magnetUri, callback)
+  } catch (err) {
+    logger.warn('Cannot remove the torrent from WebTorrent', { err: err })
+    return callback(null)
+  }
+}
+
+function createThumbnail (videoPath, callback) {
+  const filename = pathUtils.basename(videoPath) + '.jpg'
+  ffmpeg(videoPath)
+    .on('error', callback)
+    .on('end', function () {
+      callback(null, filename)
+    })
+    .thumbnail({
+      count: 1,
+      folder: thumbnailsDir,
+      size: constants.THUMBNAILS_SIZE,
+      filename: filename
+    })
+}
+
+function seed (path, callback) {
+  logger.info('Seeding %s...', path)
+
+  webtorrent.seed(path, function (torrent) {
+    logger.info('%s seeded (%s).', path, torrent.magnetURI)
+
+    return callback(null, torrent)
+  })
+}
+
+function generateThumbnailFromBase64 (data, callback) {
+  // Creating the thumbnail for this remote video
+  utils.generateRandomString(16, function (err, randomString) {
+    if (err) return callback(err)
+
+    const thumbnailName = randomString + '.jpg'
+    fs.writeFile(thumbnailsDir + thumbnailName, data, { encoding: 'base64' }, function (err) {
+      if (err) return callback(err)
+
+      return callback(null, thumbnailName)
+    })
+  })
+}