path: root/models/videos.js

;(function () {
  'use strict'

  var async = require('async')
  var config = require('config')
  var dz = require('dezalgo')
  var fs = require('fs')
  var mongoose = require('mongoose')
  var path = require('path')

  var logger = require('../helpers/logger')

  var http = config.get('webserver.https') === true ? 'https' : 'http'
  var host = config.get('webserver.host')
  var port = config.get('webserver.port')
  var uploadDir = path.join(__dirname, '..', config.get('storage.uploads'))

  // ---------------------------------------------------------------------------

  var videosSchema = mongoose.Schema({
    name: String,
    namePath: String,
    description: String,
    magnetUri: String,
    podUrl: String
  })
  var VideosDB = mongoose.model('videos', videosSchema)

  // ---------------------------------------------------------------------------

  var Videos = {
    add: add,
    addRemotes: addRemotes,
    get: get,
    getVideoState: getVideoState,
    isOwned: isOwned,
    list: list,
    listOwned: listOwned,
    removeOwned: removeOwned,
    removeAllRemotes: removeAllRemotes,
    removeAllRemotesOf: removeAllRemotesOf,
    removeRemotesOfByMagnetUris: removeRemotesOfByMagnetUris,
    search: search
  }

  function add (video, callback) {
    logger.info('Adding %s video to database.', video.name)

    var params = video
    params.podUrl = http + '://' + host + ':' + port

    VideosDB.create(params, function (err, video) {
      if (err) {
        logger.error('Cannot insert this video into database.')
        return callback(err)
      }

      callback(null)
    })
  }

  // TODO: avoid doublons
  function addRemotes (videos, callback) {
    if (!callback) callback = function () {}

    var to_add = []

    async.each(videos, function (video, callback_each) {
      callback_each = dz(callback_each)
      logger.debug('Add remote video from pod: %s', video.podUrl)

      var params = {
        name: video.name,
        namePath: null,
        description: video.description,
        magnetUri: video.magnetUri,
        podUrl: video.podUrl
      }

      to_add.push(params)

      callback_each()
    }, function () {
      VideosDB.create(to_add, function (err, videos) {
        if (err) {
          logger.error('Cannot insert this remote video.')
          return callback(err)
        }

        return callback(null, videos)
      })
    })
  }

  function get (id, callback) {
    VideosDB.findById(id, function (err, video) {
      if (err) {
        logger.error('Cannot get this video.')
        return callback(err)
      }

      return callback(null, video)
    })
  }

  function getVideoState (id, callback) {
    get(id, function (err, video) {
      if (err) return callback(err)

      var exist = (video !== null)
      var owned = false
      if (exist === true) {
        owned = (video.namePath !== null)
      }

      return callback(null, { exist: exist, owned: owned })
    })
  }

  function isOwned (id, callback) {
    VideosDB.findById(id, function (err, video) {
      if (err || !video) {
        if (!err) err = new Error('Cannot find this video.')
        logger.error('Cannot find this video.')
        return callback(err)
      }

      if (video.namePath === null) {
        var error_string = 'Cannot remove the video of another pod.'
        logger.error(error_string)
        return callback(new Error(error_string), false, video)
      }

      callback(null, true, video)
    })
  }

  function list (callback) {
    VideosDB.find(function (err, videos_list) {
      if (err) {
        logger.error('Cannot get the list of the videos.')
        return callback(err)
      }

      return callback(null, videos_list)
    })
  }

  function listOwned (callback) {
    // If namePath is not null this is *our* video
    VideosDB.find({ namePath: { $ne: null } }, function (err, videos_list) {
      if (err) {
        logger.error('Cannot get the list of owned videos.')
        return callback(err)
      }

      return callback(null, videos_list)
    })
  }

  function removeOwned (id, callback) {
    VideosDB.findByIdAndRemove(id, function (err, video) {
      if (err) {
        logger.error('Cannot remove the torrent.')
        return callback(err)
      }

      fs.unlink(uploadDir + video.namePath, function (err) {
        if (err) {
          logger.error('Cannot remove this video file.')
          return callback(err)
        }

        callback(null)
      })
    })
  }

  function removeAllRemotes (callback) {
    VideosDB.remove({ namePath: null }, callback)
  }

  function removeAllRemotesOf (fromUrl, callback) {
    // TODO { podUrl: { $in: urls } }
    VideosDB.remove({ podUrl: fromUrl }, callback)
  }

  // Use the magnet Uri because the _id field is not the same on different servers
  function removeRemotesOfByMagnetUris (fromUrl, magnetUris, callback) {
    if (callback === undefined) callback = function () {}

    VideosDB.find({ magnetUri: { $in: magnetUris } }, function (err, videos) {
      if (err || !videos) {
        logger.error('Cannot find the torrent URI of these remote videos.')
        return callback(err)
      }

      var to_remove = []
      async.each(videos, function (video, callback_async) {
        callback_async = dz(callback_async)

        if (video.podUrl !== fromUrl) {
          logger.error('The pod %s has not the rights on the video of %s.', fromUrl, video.podUrl)
        } else {
          to_remove.push(video._id)
        }

        callback_async()
      }, function () {
        VideosDB.remove({ _id: { $in: to_remove } }, function (err) {
          if (err) {
            logger.error('Cannot remove the remote videos.')
            return callback(err)
          }

          logger.info('Removed remote videos from %s.', fromUrl)
          callback(null)
        })
      })
    })
  }

  function search (name, callback) {
    VideosDB.find({ name: new RegExp(name) }, function (err, videos) {
      if (err) {
        logger.error('Cannot search the videos.')
        return callback(err)
      }

      return callback(null, videos)
    })
  }

  // ---------------------------------------------------------------------------

  module.exports = Videos
})()