1 files changed, 218 insertions, 0 deletions

diff --git a/lib/friends.js b/lib/friends.js
new file mode 100644
index 000000000..e093c85c4
--- /dev/null
+++ b/lib/friends.js
@@ -0,0 +1,218 @@
+;(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 Pods = require('../models/pods')
+  var PoolRequests = require('../models/poolRequests')
+  var poolRequests = require('../lib/poolRequests')
+  var utils = require('../helpers/utils')
+  var Videos = require('../models/videos')
+
+  var http = config.get('webserver.https') ? 'https' : 'http'
+  var host = config.get('webserver.host')
+  var port = config.get('webserver.port')
+
+  var pods = {
+    addVideoToFriends: addVideoToFriends,
+    hasFriends: hasFriends,
+    makeFriends: makeFriends,
+    quitFriends: quitFriends,
+    removeVideoToFriends: removeVideoToFriends
+  }
+
+  function addVideoToFriends (video) {
+    // To avoid duplicates
+    var id = video.name + video.magnetUri
+    // namePath is null
+    // TODO
+    video.namePath = null
+    PoolRequests.addRequest(id, 'add', video)
+  }
+
+  function hasFriends (callback) {
+    Pods.count(function (err, count) {
+      if (err) return callback(err)
+
+      var has_friends = (count !== 0)
+      callback(null, has_friends)
+    })
+  }
+
+  function makeFriends (callback) {
+    var pods_score = {}
+
+    logger.info('Make friends!')
+    fs.readFile(utils.getCertDir() + '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)
+          }
+        )
+      })
+    }
+  }
+
+  function quitFriends (callback) {
+    // Stop pool requests
+    poolRequests.deactivate()
+    // Flush pool requests
+    poolRequests.forceSend()
+
+    Pods.list(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 () {
+        Pods.removeAll(function (err) {
+          poolRequests.activate()
+
+          if (err) return callback(err)
+
+          logger.info('Broke friends, so sad :(')
+
+          Videos.removeAllRemotes(function (err) {
+            if (err) return callback(err)
+
+            logger.info('Removed all remote videos.')
+            callback(null)
+          })
+        })
+      })
+    })
+  }
+
+  function removeVideoToFriends (video) {
+    // To avoid duplicates
+    var id = video.name + video.magnetUri
+    PoolRequests.addRequest(id, 'remove', video)
+  }
+
+  // ---------------------------------------------------------------------------
+
+  module.exports = pods
+
+  // ---------------------------------------------------------------------------
+
+  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))
+    })
+  }
+})()