1 files changed, 206 insertions, 0 deletions

diff --git a/lib/poolRequests.js b/lib/poolRequests.js
new file mode 100644
index 000000000..9c7f3238b
--- /dev/null
+++ b/lib/poolRequests.js
@@ -0,0 +1,206 @@
+;(function () {
+  'use strict'
+
+  var async = require('async')
+
+  var constants = require('../initializers/constants')
+  var logger = require('../helpers/logger')
+  var database = require('../initializers/database')
+  var pluck = require('lodash-node/compat/collection/pluck')
+  var PoolRequestsDB = database.PoolRequestsDB
+  var PodsDB = database.PodsDB
+  var utils = require('../helpers/utils')
+  var VideosDB = database.VideosDB
+
+  var poolRequests = {}
+
+  // ----------- Private -----------
+  var timer = null
+
+  function removePoolRequestsFromDB (ids) {
+    PoolRequestsDB.remove({ _id: { $in: ids } }, function (err) {
+      if (err) {
+        logger.error('Cannot remove requests from the pool requests database.', { error: err })
+        return
+      }
+
+      logger.info('Pool requests flushed.')
+    })
+  }
+
+  function makePoolRequests () {
+    logger.info('Making pool requests to friends.')
+
+    PoolRequestsDB.find({}, { _id: 1, type: 1, request: 1 }, function (err, pool_requests) {
+      if (err) throw err
+
+      if (pool_requests.length === 0) return
+
+      var requests = {
+        add: {
+          ids: [],
+          requests: []
+        },
+        remove: {
+          ids: [],
+          requests: []
+        }
+      }
+
+      async.each(pool_requests, function (pool_request, callback_each) {
+        if (pool_request.type === 'add') {
+          requests.add.requests.push(pool_request.request)
+          requests.add.ids.push(pool_request._id)
+        } else if (pool_request.type === 'remove') {
+          requests.remove.requests.push(pool_request.request)
+          requests.remove.ids.push(pool_request._id)
+        } else {
+          throw new Error('Unkown pool request type.')
+        }
+
+        callback_each()
+      }, function () {
+        // Send the add requests
+        if (requests.add.requests.length !== 0) {
+          makePoolRequest('add', requests.add.requests, function (err) {
+            if (err) logger.error('Errors when sent add pool requests.', { error: err })
+
+            removePoolRequestsFromDB(requests.add.ids)
+          })
+        }
+
+        // Send the remove requests
+        if (requests.remove.requests.length !== 0) {
+          makePoolRequest('remove', requests.remove.requests, function (err) {
+            if (err) logger.error('Errors when sent remove pool requests.', { error: err })
+
+            removePoolRequestsFromDB(requests.remove.ids)
+          })
+        }
+      })
+    })
+  }
+
+  function updatePodsScore (good_pods, bad_pods) {
+    logger.info('Updating %d good pods and %d bad pods scores.', good_pods.length, bad_pods.length)
+
+    PodsDB.update({ _id: { $in: good_pods } }, { $inc: { score: constants.PODS_SCORE.BONUS } }, { multi: true }).exec()
+    PodsDB.update({ _id: { $in: bad_pods } }, { $inc: { score: constants.PODS_SCORE.MALUS } }, { multi: true }, function (err) {
+      if (err) throw err
+      removeBadPods()
+    })
+  }
+
+  function removeBadPods () {
+    PodsDB.find({ score: 0 }, { _id: 1, url: 1 }, function (err, pods) {
+      if (err) throw err
+
+      if (pods.length === 0) return
+
+      var urls = pluck(pods, 'url')
+      var ids = pluck(pods, '_id')
+
+      VideosDB.remove({ podUrl: { $in: urls } }, function (err, r) {
+        if (err) logger.error('Cannot remove videos from a pod that we removing.', { error: err })
+        var videos_removed = r.result.n
+        logger.info('Removed %d videos.', videos_removed)
+
+        PodsDB.remove({ _id: { $in: ids } }, function (err, r) {
+          if (err) logger.error('Cannot remove bad pods.', { error: err })
+
+          var pods_removed = r.result.n
+          logger.info('Removed %d pods.', pods_removed)
+        })
+      })
+    })
+  }
+
+  function makePoolRequest (type, requests, callback) {
+    if (!callback) callback = function () {}
+
+    PodsDB.find({}, { _id: 1, url: 1, publicKey: 1 }).exec(function (err, pods) {
+      if (err) throw err
+
+      var params = {
+        encrypt: true,
+        sign: true,
+        method: 'POST',
+        path: null,
+        data: requests
+      }
+
+      if (type === 'add') {
+        params.path = '/api/' + constants.API_VERSION + '/remotevideos/add'
+      } else if (type === 'remove') {
+        params.path = '/api/' + constants.API_VERSION + '/remotevideos/remove'
+      } else {
+        throw new Error('Unkown pool request type.')
+      }
+
+      var bad_pods = []
+      var good_pods = []
+
+      utils.makeMultipleRetryRequest(params, pods, callbackEachPodFinished, callbackAllPodsFinished)
+
+      function callbackEachPodFinished (err, response, body, url, pod, callback_each_pod_finished) {
+        if (err || (response.statusCode !== 200 && response.statusCode !== 204)) {
+          bad_pods.push(pod._id)
+          logger.error('Error sending secure request to %s pod.', url, { error: err || new Error('Status code not 20x') })
+        } else {
+          good_pods.push(pod._id)
+        }
+
+        return callback_each_pod_finished()
+      }
+
+      function callbackAllPodsFinished (err) {
+        if (err) return callback(err)
+
+        updatePodsScore(good_pods, bad_pods)
+        callback(null)
+      }
+    })
+  }
+
+  // ----------- Public -----------
+  poolRequests.activate = function () {
+    logger.info('Pool requests activated.')
+    timer = setInterval(makePoolRequests, constants.INTERVAL)
+  }
+
+  poolRequests.addToPoolRequests = function (id, type, request) {
+    logger.debug('Add request to the pool requests.', { id: id, type: type, request: request })
+
+    PoolRequestsDB.findOne({ id: id }, function (err, entity) {
+      if (err) logger.error(err)
+
+      if (entity) {
+        if (entity.type === type) {
+          logger.error(new Error('Cannot insert two same requests.'))
+          return
+        }
+
+        // Remove the request of the other type
+        PoolRequestsDB.remove({ id: id }, function (err) {
+          if (err) logger.error(err)
+        })
+      } else {
+        PoolRequestsDB.create({ id: id, type: type, request: request }, function (err) {
+          if (err) logger.error(err)
+        })
+      }
+    })
+  }
+
+  poolRequests.deactivate = function () {
+    logger.info('Pool requests deactivated.')
+    clearInterval(timer)
+  }
+
+  poolRequests.forceSend = function () {
+    logger.info('Force pool requests sending.')
+    makePoolRequests()
+  }
+
+  module.exports = poolRequests
+})()