1 files changed, 274 insertions, 0 deletions

diff --git a/models/pods.js b/models/pods.js
new file mode 100644
index 000000000..c8d08b26f
--- /dev/null
+++ b/models/pods.js
@@ -0,0 +1,274 @@
+;(function () {
+  'use strict'
+
+  var async = require('async')
+  var config = require('config')
+  var fs = require('fs')
+  var request = require('request')
+
+  var constants = require('../initializers/constants')
+  var logger = require('../helpers/logger')
+  var PodsDB = require('../initializers/database').PodsDB
+  var poolRequests = require('../lib/poolRequests')
+  var utils = require('../helpers/utils')
+
+  var pods = {}
+
+  var http = config.get('webserver.https') ? 'https' : 'http'
+  var host = config.get('webserver.host')
+  var port = config.get('webserver.port')
+
+  // ----------- Private functions -----------
+
+  function getForeignPodsList (url, callback) {
+    var path = '/api/' + constants.API_VERSION + '/pods'
+
+    request.get(url + path, function (err, response, body) {
+      if (err) throw err
+      callback(JSON.parse(body))
+    })
+  }
+
+  // ----------- Public functions -----------
+
+  pods.list = function (callback) {
+    PodsDB.find(function (err, pods_list) {
+      if (err) {
+        logger.error('Cannot get the list of the pods.', { error: err })
+        return callback(err)
+      }
+
+      return callback(null, pods_list)
+    })
+  }
+
+  // { url }
+  // TODO: check if the pod is not already a friend
+  pods.add = function (data, callback) {
+    var videos = require('./videos')
+    logger.info('Adding pod: %s', data.url)
+
+    var params = {
+      url: data.url,
+      publicKey: data.publicKey,
+      score: constants.FRIEND_BASE_SCORE
+    }
+
+    PodsDB.create(params, function (err, pod) {
+      if (err) {
+        logger.error('Cannot insert the pod.', { error: err })
+        return callback(err)
+      }
+
+      videos.addRemotes(data.videos)
+
+      fs.readFile(utils.certDir + 'peertube.pub', 'utf8', function (err, cert) {
+        if (err) {
+          logger.error('Cannot read cert file.', { error: err })
+          return callback(err)
+        }
+
+        videos.listOwned(function (err, videos_list) {
+          if (err) {
+            logger.error('Cannot get the list of owned videos.', { error: err })
+            return callback(err)
+          }
+
+          return callback(null, { cert: cert, videos: videos_list })
+        })
+      })
+    })
+  }
+
+  pods.remove = function (url, callback) {
+    var videos = require('./videos')
+    logger.info('Removing %s pod.', url)
+
+    videos.removeAllRemotesOf(url, function (err) {
+      if (err) logger.error('Cannot remove all remote videos of %s.', url)
+
+      PodsDB.remove({ url: url }, function (err) {
+        if (err) return callback(err)
+
+        logger.info('%s pod removed.', url)
+        callback(null)
+      })
+    })
+  }
+
+  pods.addVideoToFriends = function (video) {
+    // To avoid duplicates
+    var id = video.name + video.magnetUri
+    poolRequests.addToPoolRequests(id, 'add', video)
+  }
+
+  pods.removeVideoToFriends = function (video) {
+    // To avoid duplicates
+    var id = video.name + video.magnetUri
+    poolRequests.addToPoolRequests(id, 'remove', video)
+  }
+
+  pods.makeFriends = function (callback) {
+    var videos = require('./videos')
+    var pods_score = {}
+
+    logger.info('Make friends!')
+    fs.readFile(utils.certDir + 'peertube.pub', 'utf8', function (err, cert) {
+      if (err) {
+        logger.error('Cannot read public cert.', { error: err })
+        return callback(err)
+      }
+
+      var urls = config.get('network.friends')
+
+      async.each(urls, computeForeignPodsList, function () {
+        logger.debug('Pods scores computed.', { pods_score: pods_score })
+        var pods_list = computeWinningPods(urls, pods_score)
+        logger.debug('Pods that we keep computed.', { pods_to_keep: pods_list })
+
+        makeRequestsToWinningPods(cert, pods_list)
+      })
+    })
+
+    // -----------------------------------------------------------------------
+
+    function computeForeignPodsList (url, callback) {
+      // Let's give 1 point to the pod we ask the friends list
+      pods_score[url] = 1
+
+      getForeignPodsList(url, function (foreign_pods_list) {
+        if (foreign_pods_list.length === 0) return callback()
+
+        async.each(foreign_pods_list, function (foreign_pod, callback_each) {
+          var foreign_url = foreign_pod.url
+
+          if (pods_score[foreign_url]) pods_score[foreign_url]++
+          else pods_score[foreign_url] = 1
+
+          callback_each()
+        }, function () {
+          callback()
+        })
+      })
+    }
+
+    function computeWinningPods (urls, pods_score) {
+      // Build the list of pods to add
+      // Only add a pod if it exists in more than a half base pods
+      var pods_list = []
+      var base_score = urls.length / 2
+      Object.keys(pods_score).forEach(function (pod) {
+        if (pods_score[pod] > base_score) pods_list.push({ url: pod })
+      })
+
+      return pods_list
+    }
+
+    function makeRequestsToWinningPods (cert, pods_list) {
+      // Stop pool requests
+      poolRequests.deactivate()
+      // Flush pool requests
+      poolRequests.forceSend()
+
+      // Get the list of our videos to send to our new friends
+      videos.listOwned(function (err, videos_list) {
+        if (err) throw err
+
+        var data = {
+          url: http + '://' + host + ':' + port,
+          publicKey: cert,
+          videos: videos_list
+        }
+
+        utils.makeMultipleRetryRequest(
+          { method: 'POST', path: '/api/' + constants.API_VERSION + '/pods/', data: data },
+
+          pods_list,
+
+          function eachRequest (err, response, body, url, pod, callback_each_request) {
+            // We add the pod if it responded correctly with its public certificate
+            if (!err && response.statusCode === 200) {
+              pods.add({ url: pod.url, publicKey: body.cert, score: constants.FRIEND_BASE_SCORE }, function (err) {
+                if (err) logger.error('Error with adding %s pod.', pod.url, { error: err })
+
+                videos.addRemotes(body.videos, function (err) {
+                  if (err) logger.error('Error with adding videos of pod.', pod.url, { error: err })
+
+                  logger.debug('Adding remote videos from %s.', pod.url, { videos: body.videos })
+                  return callback_each_request()
+                })
+              })
+            } else {
+              logger.error('Error with adding %s pod.', pod.url, { error: err || new Error('Status not 200') })
+              return callback_each_request()
+            }
+          },
+
+          function endRequests (err) {
+            // Now we made new friends, we can re activate the pool of requests
+            poolRequests.activate()
+
+            if (err) {
+              logger.error('There was some errors when we wanted to make friends.', { error: err })
+              return callback(err)
+            }
+
+            logger.debug('makeRequestsToWinningPods finished.')
+            return callback(null)
+          }
+        )
+      })
+    }
+  }
+
+  pods.quitFriends = function (callback) {
+    // Stop pool requests
+    poolRequests.deactivate()
+    // Flush pool requests
+    poolRequests.forceSend()
+
+    PodsDB.find(function (err, pods) {
+      if (err) return callback(err)
+
+      var request = {
+        method: 'POST',
+        path: '/api/' + constants.API_VERSION + '/pods/remove',
+        sign: true,
+        encrypt: true,
+        data: {
+          url: 'me' // Fake data
+        }
+      }
+
+      // Announce we quit them
+      utils.makeMultipleRetryRequest(request, pods, function () {
+        PodsDB.remove(function (err) {
+          poolRequests.activate()
+
+          if (err) return callback(err)
+
+          logger.info('Broke friends, so sad :(')
+
+          var videos = require('./videos')
+          videos.removeAllRemotes(function (err) {
+            if (err) return callback(err)
+
+            logger.info('Removed all remote videos.')
+            callback(null)
+          })
+        })
+      })
+    })
+  }
+
+  pods.hasFriends = function (callback) {
+    PodsDB.count(function (err, count) {
+      if (err) return callback(err)
+
+      var has_friends = (count !== 0)
+      callback(null, has_friends)
+    })
+  }
+
+  module.exports = pods
+})()