4 files changed, 458 insertions, 0 deletions

diff --git a/server/lib/request/base-request-scheduler.js b/server/lib/request/base-request-scheduler.js
new file mode 100644
index 000000000..782448340
--- /dev/null
+++ b/server/lib/request/base-request-scheduler.js
@@ -0,0 +1,136 @@
+'use strict'
+
+const eachLimit = require('async/eachLimit')
+
+const constants = require('../../initializers/constants')
+const db = require('../../initializers/database')
+const logger = require('../../helpers/logger')
+const requests = require('../../helpers/requests')
+
+module.exports = class BaseRequestScheduler {
+  constructor (options) {
+    this.lastRequestTimestamp = 0
+    this.timer = null
+    this.requestInterval = constants.REQUESTS_INTERVAL
+  }
+
+  activate () {
+    logger.info('Requests scheduler activated.')
+    this.lastRequestTimestamp = Date.now()
+
+    this.timer = setInterval(() => {
+      this.lastRequestTimestamp = Date.now()
+      this.makeRequests()
+    }, this.requestInterval)
+  }
+
+  deactivate () {
+    logger.info('Requests scheduler deactivated.')
+    clearInterval(this.timer)
+    this.timer = null
+  }
+
+  forceSend () {
+    logger.info('Force requests scheduler sending.')
+    this.makeRequests()
+  }
+
+  remainingMilliSeconds () {
+    if (this.timer === null) return -1
+
+    return constants.REQUESTS_INTERVAL - (Date.now() - this.lastRequestTimestamp)
+  }
+
+  remainingRequestsCount (callback) {
+    return this.getRequestModel().countTotalRequests(callback)
+  }
+
+  // ---------------------------------------------------------------------------
+
+  // Make a requests to friends of a certain type
+  makeRequest (toPod, requestEndpoint, requestsToMake, callback) {
+    if (!callback) callback = function () {}
+
+    const params = {
+      toPod: toPod,
+      sign: true, // Prove our identity
+      method: 'POST',
+      path: '/api/' + constants.API_VERSION + '/remote/' + requestEndpoint,
+      data: requestsToMake // Requests we need to make
+    }
+
+    // Make multiple retry requests to all of pods
+    // The function fire some useful callbacks
+    requests.makeSecureRequest(params, (err, res) => {
+      if (err || (res.statusCode !== 200 && res.statusCode !== 201 && res.statusCode !== 204)) {
+        err = err ? err.message : 'Status code not 20x : ' + res.statusCode
+        logger.error('Error sending secure request to %s pod.', toPod.host, { error: err })
+
+        return callback(err)
+      }
+
+      return callback(null)
+    })
+  }
+
+    // Make all the requests of the scheduler
+  makeRequests () {
+    this.getRequestModel().listWithLimitAndRandom(this.limitPods, this.limitPerPod, (err, requests) => {
+      if (err) {
+        logger.error('Cannot get the list of "%s".', this.description, { err: err })
+        return // Abort
+      }
+
+      // If there are no requests, abort
+      if (requests.length === 0) {
+        logger.info('No "%s" to make.', this.description)
+        return
+      }
+
+      // We want to group requests by destinations pod and endpoint
+      const requestsToMakeGrouped = this.buildRequestObjects(requests)
+
+      logger.info('Making "%s" to friends.', this.description)
+
+      const goodPods = []
+      const badPods = []
+
+      eachLimit(Object.keys(requestsToMakeGrouped), constants.REQUESTS_IN_PARALLEL, (hashKey, callbackEach) => {
+        const requestToMake = requestsToMakeGrouped[hashKey]
+        const toPod = requestToMake.toPod
+
+        this.makeRequest(toPod, requestToMake.endpoint, requestToMake.datas, (err) => {
+          if (err) {
+            badPods.push(requestToMake.toPod.id)
+            return callbackEach()
+          }
+
+          logger.debug('Removing requests for pod %s.', requestToMake.toPod.id, { requestsIds: requestToMake.ids })
+          goodPods.push(requestToMake.toPod.id)
+
+          // Remove the pod id of these request ids
+          this.getRequestToPodModel().removeByRequestIdsAndPod(requestToMake.ids, requestToMake.toPod.id, callbackEach)
+
+          this.afterRequestHook()
+        })
+      }, () => {
+        // All the requests were made, we update the pods score
+        db.Pod.updatePodsScore(goodPods, badPods)
+
+        this.afterRequestsHook()
+      })
+    })
+  }
+
+  flush (callback) {
+    this.getRequestModel().removeAll(callback)
+  }
+
+  afterRequestHook () {
+   // Nothing to do, let children reimplement it
+  }
+
+  afterRequestsHook () {
+   // Nothing to do, let children reimplement it
+  }
+}
diff --git a/server/lib/request/request-scheduler.js b/server/lib/request/request-scheduler.js
new file mode 100644
index 000000000..555ec3e54
--- /dev/null
+++ b/server/lib/request/request-scheduler.js
@@ -0,0 +1,97 @@
+'use strict'
+
+const constants = require('../../initializers/constants')
+const BaseRequestScheduler = require('./base-request-scheduler')
+const db = require('../../initializers/database')
+const logger = require('../../helpers/logger')
+
+module.exports = class RequestScheduler extends BaseRequestScheduler {
+  constructor () {
+    super()
+
+    // We limit the size of the requests
+    this.limitPods = constants.REQUESTS_LIMIT_PODS
+    this.limitPerPod = constants.REQUESTS_LIMIT_PER_POD
+
+    this.description = 'requests'
+  }
+
+  getRequestModel () {
+    return db.Request
+  }
+
+  getRequestToPodModel () {
+    return db.RequestToPod
+  }
+
+  buildRequestObjects (requests) {
+    const requestsToMakeGrouped = {}
+
+    Object.keys(requests).forEach(toPodId => {
+      requests[toPodId].forEach(data => {
+        const request = data.request
+        const pod = data.pod
+        const hashKey = toPodId + request.endpoint
+
+        if (!requestsToMakeGrouped[hashKey]) {
+          requestsToMakeGrouped[hashKey] = {
+            toPod: pod,
+            endpoint: request.endpoint,
+            ids: [], // request ids, to delete them from the DB in the future
+            datas: [] // requests data,
+          }
+        }
+
+        requestsToMakeGrouped[hashKey].ids.push(request.id)
+        requestsToMakeGrouped[hashKey].datas.push(request.request)
+      })
+    })
+
+    return requestsToMakeGrouped
+  }
+
+  // { type, endpoint, data, toIds, transaction }
+  createRequest (options, callback) {
+    const type = options.type
+    const endpoint = options.endpoint
+    const data = options.data
+    const toIds = options.toIds
+    const transaction = options.transaction
+
+    const pods = []
+
+    // If there are no destination pods abort
+    if (toIds.length === 0) return callback(null)
+
+    toIds.forEach(toPod => {
+      pods.push(db.Pod.build({ id: toPod }))
+    })
+
+    const createQuery = {
+      endpoint,
+      request: {
+        type: type,
+        data: data
+      }
+    }
+
+    const dbRequestOptions = {
+      transaction
+    }
+
+    return db.Request.create(createQuery, dbRequestOptions).asCallback((err, request) => {
+      if (err) return callback(err)
+
+      return request.setPods(pods, dbRequestOptions).asCallback(callback)
+    })
+  }
+
+  // ---------------------------------------------------------------------------
+
+  afterRequestsHook () {
+    // Flush requests with no pod
+    this.getRequestModel().removeWithEmptyTo(err => {
+      if (err) logger.error('Error when removing requests with no pods.', { error: err })
+    })
+  }
+}
diff --git a/server/lib/request/request-video-event-scheduler.js b/server/lib/request/request-video-event-scheduler.js
new file mode 100644
index 000000000..e54d34f4a
--- /dev/null
+++ b/server/lib/request/request-video-event-scheduler.js
@@ -0,0 +1,108 @@
+'use strict'
+
+const BaseRequestScheduler = require('./base-request-scheduler')
+const constants = require('../../initializers/constants')
+const db = require('../../initializers/database')
+
+module.exports = class RequestVideoEventScheduler extends BaseRequestScheduler {
+  constructor () {
+    super()
+
+    // We limit the size of the requests
+    this.limitPods = constants.REQUESTS_VIDEO_EVENT_LIMIT_PODS
+    this.limitPerPod = constants.REQUESTS_VIDEO_EVENT_LIMIT_PER_POD
+
+    this.description = 'video event requests'
+  }
+
+  getRequestModel () {
+    return db.RequestVideoEvent
+  }
+
+  getRequestToPodModel () {
+    return db.RequestVideoEvent
+  }
+
+  buildRequestObjects (eventsToProcess) {
+    const requestsToMakeGrouped = {}
+
+    /* Example:
+        {
+          pod1: {
+            video1: { views: 4, likes: 5 },
+            video2: { likes: 5 }
+          }
+        }
+    */
+    const eventsPerVideoPerPod = {}
+
+    // We group video events per video and per pod
+    // We add the counts of the same event types
+    Object.keys(eventsToProcess).forEach(toPodId => {
+      eventsToProcess[toPodId].forEach(eventToProcess => {
+        if (!eventsPerVideoPerPod[toPodId]) eventsPerVideoPerPod[toPodId] = {}
+
+        if (!requestsToMakeGrouped[toPodId]) {
+          requestsToMakeGrouped[toPodId] = {
+            toPod: eventToProcess.pod,
+            endpoint: constants.REQUEST_VIDEO_EVENT_ENDPOINT,
+            ids: [], // request ids, to delete them from the DB in the future
+            datas: [] // requests data
+          }
+        }
+        requestsToMakeGrouped[toPodId].ids.push(eventToProcess.id)
+
+        const eventsPerVideo = eventsPerVideoPerPod[toPodId]
+        const remoteId = eventToProcess.video.remoteId
+        if (!eventsPerVideo[remoteId]) eventsPerVideo[remoteId] = {}
+
+        const events = eventsPerVideo[remoteId]
+        if (!events[eventToProcess.type]) events[eventToProcess.type] = 0
+
+        events[eventToProcess.type] += eventToProcess.count
+      })
+    })
+
+    // Now we build our requests array per pod
+    Object.keys(eventsPerVideoPerPod).forEach(toPodId => {
+      const eventsForPod = eventsPerVideoPerPod[toPodId]
+
+      Object.keys(eventsForPod).forEach(remoteId => {
+        const eventsForVideo = eventsForPod[remoteId]
+
+        Object.keys(eventsForVideo).forEach(eventType => {
+          requestsToMakeGrouped[toPodId].datas.push({
+            data: {
+              remoteId,
+              eventType,
+              count: eventsForVideo[eventType]
+            }
+          })
+        })
+      })
+    })
+
+    return requestsToMakeGrouped
+  }
+
+  // { type, videoId, count?, transaction? }
+  createRequest (options, callback) {
+    const type = options.type
+    const videoId = options.videoId
+    const transaction = options.transaction
+    let count = options.count
+
+    if (count === undefined) count = 1
+
+    const dbRequestOptions = {}
+    if (transaction) dbRequestOptions.transaction = transaction
+
+    const createQuery = {
+      type,
+      count,
+      videoId
+    }
+
+    return db.RequestVideoEvent.create(createQuery, dbRequestOptions).asCallback(callback)
+  }
+}
diff --git a/server/lib/request/request-video-qadu-scheduler.js b/server/lib/request/request-video-qadu-scheduler.js
new file mode 100644
index 000000000..17402b556
--- /dev/null
+++ b/server/lib/request/request-video-qadu-scheduler.js
@@ -0,0 +1,117 @@
+'use strict'
+
+const BaseRequestScheduler = require('./base-request-scheduler')
+const constants = require('../../initializers/constants')
+const db = require('../../initializers/database')
+const logger = require('../../helpers/logger')
+
+module.exports = class RequestVideoQaduScheduler extends BaseRequestScheduler {
+  constructor () {
+    super()
+
+    // We limit the size of the requests
+    this.limitPods = constants.REQUESTS_VIDEO_QADU_LIMIT_PODS
+    this.limitPerPod = constants.REQUESTS_VIDEO_QADU_LIMIT_PER_POD
+
+    this.description = 'video QADU requests'
+  }
+
+  getRequestModel () {
+    return db.RequestVideoQadu
+  }
+
+  getRequestToPodModel () {
+    return db.RequestVideoQadu
+  }
+
+  buildRequestObjects (requests) {
+    const requestsToMakeGrouped = {}
+
+    Object.keys(requests).forEach(toPodId => {
+      requests[toPodId].forEach(data => {
+        const request = data.request
+        const video = data.video
+        const pod = data.pod
+        const hashKey = toPodId
+
+        if (!requestsToMakeGrouped[hashKey]) {
+          requestsToMakeGrouped[hashKey] = {
+            toPod: pod,
+            endpoint: constants.REQUEST_VIDEO_QADU_ENDPOINT,
+            ids: [], // request ids, to delete them from the DB in the future
+            datas: [], // requests data
+            videos: {}
+          }
+        }
+
+        // Maybe another attribute was filled for this video
+        let videoData = requestsToMakeGrouped[hashKey].videos[video.id]
+        if (!videoData) videoData = {}
+
+        switch (request.type) {
+          case constants.REQUEST_VIDEO_QADU_TYPES.LIKES:
+            videoData.likes = video.likes
+            break
+
+          case constants.REQUEST_VIDEO_QADU_TYPES.DISLIKES:
+            videoData.dislikes = video.dislikes
+            break
+
+          case constants.REQUEST_VIDEO_QADU_TYPES.VIEWS:
+            videoData.views = video.views
+            break
+
+          default:
+            logger.error('Unknown request video QADU type %s.', request.type)
+            return
+        }
+
+        // Do not forget the remoteId so the remote pod can identify the video
+        videoData.remoteId = video.id
+        requestsToMakeGrouped[hashKey].ids.push(request.id)
+
+        // Maybe there are multiple quick and dirty update for the same video
+        // We use this hashmap to dedupe them
+        requestsToMakeGrouped[hashKey].videos[video.id] = videoData
+      })
+    })
+
+    // Now we deduped similar quick and dirty updates, we can build our requests datas
+    Object.keys(requestsToMakeGrouped).forEach(hashKey => {
+      Object.keys(requestsToMakeGrouped[hashKey].videos).forEach(videoId => {
+        const videoData = requestsToMakeGrouped[hashKey].videos[videoId]
+
+        requestsToMakeGrouped[hashKey].datas.push({
+          data: videoData
+        })
+      })
+
+      // We don't need it anymore, it was just to build our datas array
+      delete requestsToMakeGrouped[hashKey].videos
+    })
+
+    return requestsToMakeGrouped
+  }
+
+  // { type, videoId, transaction? }
+  createRequest (options, callback) {
+    const type = options.type
+    const videoId = options.videoId
+    const transaction = options.transaction
+
+    const dbRequestOptions = {}
+    if (transaction) dbRequestOptions.transaction = transaction
+
+    // Send the update to all our friends
+    db.Pod.listAllIds(options.transaction, function (err, podIds) {
+      if (err) return callback(err)
+
+      const queries = []
+      podIds.forEach(podId => {
+        queries.push({ type, videoId, podId })
+      })
+
+      return db.RequestVideoQadu.bulkCreate(queries, dbRequestOptions).asCallback(callback)
+    })
+  }
+}