Rename pool requests --> requests scheduler

1 files changed, 221 insertions, 0 deletions

diff --git a/server/lib/requestsScheduler.js b/server/lib/requestsScheduler.js
new file mode 100644
index 000000000..2c5474e51
--- /dev/null
+++ b/server/lib/requestsScheduler.js
@@ -0,0 +1,221 @@
+'use strict'
+
+const async = require('async')
+const map = require('lodash/map')
+
+const constants = require('../initializers/constants')
+const logger = require('../helpers/logger')
+const Pods = require('../models/pods')
+const Requests = require('../models/requests')
+const requests = require('../helpers/requests')
+const Videos = require('../models/videos')
+
+let timer = null
+
+const requestsScheduler = {
+  activate: activate,
+  addRequest: addRequest,
+  deactivate: deactivate,
+  forceSend: forceSend
+}
+
+function activate () {
+  logger.info('Requests scheduler activated.')
+  timer = setInterval(makeRequests, constants.INTERVAL)
+}
+
+function addRequest (id, type, request) {
+  logger.debug('Add request to the requests scheduler.', { id: id, type: type, request: request })
+
+  Requests.findById(id, function (err, entity) {
+    if (err) {
+      logger.error('Cannot find one request.', { error: err })
+      return // Abort
+    }
+
+    if (entity) {
+      if (entity.type === type) {
+        logger.error('Cannot insert two same requests.')
+        return // Abort
+      }
+
+      // Remove the request of the other type
+      Requests.removeRequestById(id, function (err) {
+        if (err) {
+          logger.error('Cannot remove a request.', { error: err })
+          return // Abort
+        }
+      })
+    } else {
+      Requests.create(id, type, request, function (err) {
+        if (err) logger.error('Cannot create a request.', { error: err })
+        return // Abort
+      })
+    }
+  })
+}
+
+function deactivate () {
+  logger.info('Requests scheduler deactivated.')
+  clearInterval(timer)
+}
+
+function forceSend () {
+  logger.info('Force requests scheduler sending.')
+  makeRequests()
+}
+
+// ---------------------------------------------------------------------------
+
+module.exports = requestsScheduler
+
+// ---------------------------------------------------------------------------
+
+function makeRequest (type, requests_to_make, callback) {
+  if (!callback) callback = function () {}
+
+  Pods.list(function (err, pods) {
+    if (err) return callback(err)
+
+    const params = {
+      encrypt: true,
+      sign: true,
+      method: 'POST',
+      path: null,
+      data: requests_to_make
+    }
+
+    if (type === 'add') {
+      params.path = '/api/' + constants.API_VERSION + '/remotevideos/add'
+    } else if (type === 'remove') {
+      params.path = '/api/' + constants.API_VERSION + '/remotevideos/remove'
+    } else {
+      return callback(new Error('Unkown pool request type.'))
+    }
+
+    const bad_pods = []
+    const good_pods = []
+
+    requests.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)
+    }
+  })
+}
+
+function makeRequests () {
+  logger.info('Making requests to friends.')
+
+  Requests.list(function (err, requests) {
+    if (err) {
+      logger.error('Cannot get the list of requests.', { err: err })
+      return // Abort
+    }
+
+    if (requests.length === 0) return
+
+    const requests_to_make = {
+      add: {
+        ids: [],
+        requests: []
+      },
+      remove: {
+        ids: [],
+        requests: []
+      }
+    }
+
+    async.each(requests, function (pool_request, callback_each) {
+      if (pool_request.type === 'add') {
+        requests_to_make.add.requests.push(pool_request.request)
+        requests_to_make.add.ids.push(pool_request._id)
+      } else if (pool_request.type === 'remove') {
+        requests_to_make.remove.requests.push(pool_request.request)
+        requests_to_make.remove.ids.push(pool_request._id)
+      } else {
+        logger.error('Unkown request type.', { request_type: pool_request.type })
+        return // abort
+      }
+
+      callback_each()
+    }, function () {
+      // Send the add requests
+      if (requests_to_make.add.requests.length !== 0) {
+        makeRequest('add', requests_to_make.add.requests, function (err) {
+          if (err) logger.error('Errors when sent add requests.', { error: err })
+
+          Requests.removeRequests(requests_to_make.add.ids)
+        })
+      }
+
+      // Send the remove requests
+      if (requests_to_make.remove.requests.length !== 0) {
+        makeRequest('remove', requests_to_make.remove.requests, function (err) {
+          if (err) logger.error('Errors when sent remove pool requests.', { error: err })
+
+          Requests.removeRequests(requests_to_make.remove.ids)
+        })
+      }
+    })
+  })
+}
+
+function removeBadPods () {
+  Pods.findBadPods(function (err, pods) {
+    if (err) {
+      logger.error('Cannot find bad pods.', { error: err })
+      return // abort
+    }
+
+    if (pods.length === 0) return
+
+    const urls = map(pods, 'url')
+    const ids = map(pods, '_id')
+
+    Videos.removeAllRemotesOf(urls, function (err, r) {
+      if (err) {
+        logger.error('Cannot remove videos from a pod that we removing.', { error: err })
+      } else {
+        const videos_removed = r.result.n
+        logger.info('Removed %d videos.', videos_removed)
+      }
+
+      Pods.removeAllByIds(ids, function (err, r) {
+        if (err) {
+          logger.error('Cannot remove bad pods.', { error: err })
+        } else {
+          const pods_removed = r.result.n
+          logger.info('Removed %d pods.', pods_removed)
+        }
+      })
+    })
+  })
+}
+
+function updatePodsScore (good_pods, bad_pods) {
+  logger.info('Updating %d good pods and %d bad pods scores.', good_pods.length, bad_pods.length)
+
+  Pods.incrementScores(good_pods, constants.PODS_SCORE.BONUS, function (err) {
+    if (err) logger.error('Cannot increment scores of good pods.')
+  })
+
+  Pods.incrementScores(bad_pods, constants.PODS_SCORE.MALUS, function (err) {
+    if (err) logger.error('Cannot increment scores of bad pods.')
+    removeBadPods()
+  })
+}