Reorganize model files

9 files changed, 719 insertions, 0 deletions

diff --git a/server/models/request/index.ts b/server/models/request/index.ts
new file mode 100644
index 000000000..824c140f5
--- /dev/null
+++ b/server/models/request/index.ts
@@ -0,0 +1,4 @@
+export * from './request-interface'
+export * from './request-to-pod-interface'
+export * from './request-video-event-interface'
+export * from './request-video-qadu-interface'
diff --git a/server/models/request/request-interface.ts b/server/models/request/request-interface.ts
new file mode 100644
index 000000000..70fd734e1
--- /dev/null
+++ b/server/models/request/request-interface.ts
@@ -0,0 +1,47 @@
+import * as Sequelize from 'sequelize'
+
+import { PodInstance, PodAttributes } from '../pod'
+
+export type RequestsGrouped = {
+  [ podId: number ]: {
+    request: RequestInstance,
+    pod: PodInstance
+  }[]
+}
+
+export namespace RequestMethods {
+  export type CountTotalRequestsCallback = (err: Error, total: number) => void
+  export type CountTotalRequests = (callback: CountTotalRequestsCallback) => void
+
+  export type ListWithLimitAndRandomCallback = (err: Error, requestsGrouped?: RequestsGrouped) => void
+  export type ListWithLimitAndRandom = (limitPods, limitRequestsPerPod, callback: ListWithLimitAndRandomCallback) => void
+
+  export type RemoveWithEmptyToCallback = (err: Error) => void
+  export type RemoveWithEmptyTo = (callback: RemoveWithEmptyToCallback) => void
+
+  export type RemoveAllCallback = (err: Error) => void
+  export type RemoveAll = (callback: RemoveAllCallback) => void
+}
+
+export interface RequestClass {
+  countTotalRequests: RequestMethods.CountTotalRequests
+  listWithLimitAndRandom: RequestMethods.ListWithLimitAndRandom
+  removeWithEmptyTo: RequestMethods.RemoveWithEmptyTo
+  removeAll: RequestMethods.RemoveAll
+}
+
+export interface RequestAttributes {
+  request: object
+  endpoint: string
+}
+
+export interface RequestInstance extends RequestClass, RequestAttributes, Sequelize.Instance<RequestAttributes> {
+  id: number
+  createdAt: Date
+  updatedAt: Date
+
+  setPods: Sequelize.HasManySetAssociationsMixin<PodAttributes, number>
+  Pods: PodInstance[]
+}
+
+export interface RequestModel extends RequestClass, Sequelize.Model<RequestInstance, RequestAttributes> {}
diff --git a/server/models/request/request-to-pod-interface.ts b/server/models/request/request-to-pod-interface.ts
new file mode 100644
index 000000000..6d75ca6e5
--- /dev/null
+++ b/server/models/request/request-to-pod-interface.ts
@@ -0,0 +1,21 @@
+import * as Sequelize from 'sequelize'
+
+export namespace RequestToPodMethods {
+  export type RemoveByRequestIdsAndPodCallback = (err: Error) => void
+  export type RemoveByRequestIdsAndPod = (requestsIds: number[], podId: number, callback?: RemoveByRequestIdsAndPodCallback) => void
+}
+
+export interface RequestToPodClass {
+  removeByRequestIdsAndPod: RequestToPodMethods.RemoveByRequestIdsAndPod
+}
+
+export interface RequestToPodAttributes {
+}
+
+export interface RequestToPodInstance extends RequestToPodClass, RequestToPodAttributes, Sequelize.Instance<RequestToPodAttributes> {
+  id: number
+  createdAt: Date
+  updatedAt: Date
+}
+
+export interface RequestToPodModel extends RequestToPodClass, Sequelize.Model<RequestToPodInstance, RequestToPodAttributes> {}
diff --git a/server/models/request/request-to-pod.ts b/server/models/request/request-to-pod.ts
new file mode 100644
index 000000000..67331be1d
--- /dev/null
+++ b/server/models/request/request-to-pod.ts
@@ -0,0 +1,54 @@
+import * as Sequelize from 'sequelize'
+
+import { addMethodsToModel } from '../utils'
+import {
+  RequestToPodClass,
+  RequestToPodInstance,
+  RequestToPodAttributes,
+
+  RequestToPodMethods
+} from './request-to-pod-interface'
+
+let RequestToPod: Sequelize.Model<RequestToPodInstance, RequestToPodAttributes>
+let removeByRequestIdsAndPod: RequestToPodMethods.RemoveByRequestIdsAndPod
+
+export default function (sequelize: Sequelize.Sequelize, DataTypes: Sequelize.DataTypes) {
+  RequestToPod = sequelize.define<RequestToPodInstance, RequestToPodAttributes>('RequestToPod', {}, {
+    indexes: [
+      {
+        fields: [ 'requestId' ]
+      },
+      {
+        fields: [ 'podId' ]
+      },
+      {
+        fields: [ 'requestId', 'podId' ],
+        unique: true
+      }
+    ]
+  })
+
+  const classMethods = [
+    removeByRequestIdsAndPod
+  ]
+  addMethodsToModel(RequestToPod, classMethods)
+
+  return RequestToPod
+}
+
+// ---------------------------------------------------------------------------
+
+removeByRequestIdsAndPod = function (requestsIds: number[], podId: number, callback?: RequestToPodMethods.RemoveByRequestIdsAndPodCallback) {
+  if (!callback) callback = function () { /* empty */ }
+
+  const query = {
+    where: {
+      requestId: {
+        $in: requestsIds
+      },
+      podId: podId
+    }
+  }
+
+  RequestToPod.destroy(query).asCallback(callback)
+}
diff --git a/server/models/request/request-video-event-interface.ts b/server/models/request/request-video-event-interface.ts
new file mode 100644
index 000000000..219d8edc0
--- /dev/null
+++ b/server/models/request/request-video-event-interface.ts
@@ -0,0 +1,48 @@
+import * as Sequelize from 'sequelize'
+
+import { VideoInstance } from '../video'
+import { PodInstance } from '../pod'
+
+export type RequestsVideoEventGrouped = {
+  [ podId: number ]: {
+    id: number
+    type: string
+    count: number
+    video: VideoInstance
+    pod: PodInstance
+  }[]
+}
+
+export namespace RequestVideoEventMethods {
+  export type CountTotalRequestsCallback = (err: Error, total: number) => void
+  export type CountTotalRequests = (callback: CountTotalRequestsCallback) => void
+
+  export type ListWithLimitAndRandomCallback = (err: Error, requestsGrouped?: RequestsVideoEventGrouped) => void
+  export type ListWithLimitAndRandom = (limitPods: number, limitRequestsPerPod: number, callback: ListWithLimitAndRandomCallback) => void
+
+  export type RemoveByRequestIdsAndPodCallback = () => void
+  export type RemoveByRequestIdsAndPod = (ids: number[], podId: number, callback: RemoveByRequestIdsAndPodCallback) => void
+
+  export type RemoveAllCallback = () => void
+  export type RemoveAll = (callback: RemoveAllCallback) => void
+}
+
+export interface RequestVideoEventClass {
+  countTotalRequests: RequestVideoEventMethods.CountTotalRequests
+  listWithLimitAndRandom: RequestVideoEventMethods.ListWithLimitAndRandom
+  removeByRequestIdsAndPod: RequestVideoEventMethods.RemoveByRequestIdsAndPod
+  removeAll: RequestVideoEventMethods.RemoveAll
+}
+
+export interface RequestVideoEventAttributes {
+  type: string
+  count: number
+}
+
+export interface RequestVideoEventInstance extends RequestVideoEventClass, RequestVideoEventAttributes, Sequelize.Instance<RequestVideoEventAttributes> {
+  id: number
+
+  Video: VideoInstance
+}
+
+export interface RequestVideoEventModel extends RequestVideoEventClass, Sequelize.Model<RequestVideoEventInstance, RequestVideoEventAttributes> {}
diff --git a/server/models/request/request-video-event.ts b/server/models/request/request-video-event.ts
new file mode 100644
index 000000000..f552ef50b
--- /dev/null
+++ b/server/models/request/request-video-event.ts
@@ -0,0 +1,185 @@
+/*
+  Request Video events (likes, dislikes, views...)
+*/
+
+import { values } from 'lodash'
+import * as Sequelize from 'sequelize'
+
+import { database as db } from '../../initializers/database'
+import { REQUEST_VIDEO_EVENT_TYPES } from '../../initializers'
+import { isVideoEventCountValid } from '../../helpers'
+import { addMethodsToModel } from '../utils'
+import {
+  RequestVideoEventClass,
+  RequestVideoEventInstance,
+  RequestVideoEventAttributes,
+
+  RequestVideoEventMethods,
+  RequestsVideoEventGrouped
+} from './request-video-event-interface'
+
+let RequestVideoEvent: Sequelize.Model<RequestVideoEventInstance, RequestVideoEventAttributes>
+let countTotalRequests: RequestVideoEventMethods.CountTotalRequests
+let listWithLimitAndRandom: RequestVideoEventMethods.ListWithLimitAndRandom
+let removeByRequestIdsAndPod: RequestVideoEventMethods.RemoveByRequestIdsAndPod
+let removeAll: RequestVideoEventMethods.RemoveAll
+
+export default function (sequelize: Sequelize.Sequelize, DataTypes: Sequelize.DataTypes) {
+  RequestVideoEvent = sequelize.define<RequestVideoEventInstance, RequestVideoEventAttributes>('RequestVideoEvent',
+    {
+      type: {
+        type: DataTypes.ENUM(values(REQUEST_VIDEO_EVENT_TYPES)),
+        allowNull: false
+      },
+      count: {
+        type: DataTypes.INTEGER,
+        allowNull: false,
+        validate: {
+          countValid: function (value) {
+            const res = isVideoEventCountValid(value)
+            if (res === false) throw new Error('Video event count is not valid.')
+          }
+        }
+      }
+    },
+    {
+      updatedAt: false,
+      indexes: [
+        {
+          fields: [ 'videoId' ]
+        }
+      ]
+    }
+  )
+
+  const classMethods = [
+    associate,
+
+    listWithLimitAndRandom,
+    countTotalRequests,
+    removeAll,
+    removeByRequestIdsAndPod
+  ]
+  addMethodsToModel(RequestVideoEvent, classMethods)
+
+  return RequestVideoEvent
+}
+
+// ------------------------------ STATICS ------------------------------
+
+function associate (models) {
+  RequestVideoEvent.belongsTo(models.Video, {
+    foreignKey: {
+      name: 'videoId',
+      allowNull: false
+    },
+    onDelete: 'CASCADE'
+  })
+}
+
+countTotalRequests = function (callback: RequestVideoEventMethods.CountTotalRequestsCallback) {
+  const query = {}
+  return RequestVideoEvent.count(query).asCallback(callback)
+}
+
+listWithLimitAndRandom = function (limitPods: number, limitRequestsPerPod: number, callback: RequestVideoEventMethods.ListWithLimitAndRandomCallback) {
+  const Pod = db.Pod
+
+  // We make a join between videos and authors to find the podId of our video event requests
+  const podJoins = 'INNER JOIN "Videos" ON "Videos"."authorId" = "Authors"."id" ' +
+                   'INNER JOIN "RequestVideoEvents" ON "RequestVideoEvents"."videoId" = "Videos"."id"'
+
+  Pod.listRandomPodIdsWithRequest(limitPods, 'Authors', podJoins, function (err, podIds) {
+    if (err) return callback(err)
+
+    // We don't have friends that have requests
+    if (podIds.length === 0) return callback(null, [])
+
+    const query = {
+      order: [
+        [ 'id', 'ASC' ]
+      ],
+      include: [
+        {
+          model: RequestVideoEvent['sequelize'].models.Video,
+          include: [
+            {
+              model: RequestVideoEvent['sequelize'].models.Author,
+              include: [
+                {
+                  model: RequestVideoEvent['sequelize'].models.Pod,
+                  where: {
+                    id: {
+                      $in: podIds
+                    }
+                  }
+                }
+              ]
+            }
+          ]
+        }
+      ]
+    }
+
+    RequestVideoEvent.findAll(query).asCallback(function (err, requests) {
+      if (err) return callback(err)
+
+      const requestsGrouped = groupAndTruncateRequests(requests, limitRequestsPerPod)
+      return callback(err, requestsGrouped)
+    })
+  })
+}
+
+removeByRequestIdsAndPod = function (ids: number[], podId: number, callback: RequestVideoEventMethods.RemoveByRequestIdsAndPodCallback) {
+  const query = {
+    where: {
+      id: {
+        $in: ids
+      }
+    },
+    include: [
+      {
+        model: RequestVideoEvent['sequelize'].models.Video,
+        include: [
+          {
+            model: RequestVideoEvent['sequelize'].models.Author,
+            where: {
+              podId
+            }
+          }
+        ]
+      }
+    ]
+  }
+
+  RequestVideoEvent.destroy(query).asCallback(callback)
+}
+
+removeAll = function (callback: RequestVideoEventMethods.RemoveAllCallback) {
+  // Delete all requests
+  RequestVideoEvent.truncate({ cascade: true }).asCallback(callback)
+}
+
+// ---------------------------------------------------------------------------
+
+function groupAndTruncateRequests (events: RequestVideoEventInstance[], limitRequestsPerPod: number) {
+  const eventsGrouped: RequestsVideoEventGrouped = {}
+
+  events.forEach(function (event) {
+    const pod = event.Video.Author.Pod
+
+    if (!eventsGrouped[pod.id]) eventsGrouped[pod.id] = []
+
+    if (eventsGrouped[pod.id].length < limitRequestsPerPod) {
+      eventsGrouped[pod.id].push({
+        id: event.id,
+        type: event.type,
+        count: event.count,
+        video: event.Video,
+        pod
+      })
+    }
+  })
+
+  return eventsGrouped
+}
diff --git a/server/models/request/request-video-qadu-interface.ts b/server/models/request/request-video-qadu-interface.ts
new file mode 100644
index 000000000..625b063dc
--- /dev/null
+++ b/server/models/request/request-video-qadu-interface.ts
@@ -0,0 +1,46 @@
+import * as Sequelize from 'sequelize'
+
+import { VideoInstance } from '../video'
+import { PodInstance } from '../pod'
+
+export type RequestsVideoQaduGrouped = {
+  [ podId: number ]: {
+    request: RequestVideoQaduInstance
+    video: VideoInstance
+    pod: PodInstance
+  }
+}
+
+export namespace RequestVideoQaduMethods {
+  export type CountTotalRequestsCallback = (err: Error, total: number) => void
+  export type CountTotalRequests = (callback: CountTotalRequestsCallback) => void
+
+  export type ListWithLimitAndRandomCallback = (err: Error, requestsGrouped?: RequestsVideoQaduGrouped) => void
+  export type ListWithLimitAndRandom = (limitPods: number, limitRequestsPerPod: number, callback: ListWithLimitAndRandomCallback) => void
+
+  export type RemoveByRequestIdsAndPodCallback = () => void
+  export type RemoveByRequestIdsAndPod = (ids: number[], podId: number, callback: RemoveByRequestIdsAndPodCallback) => void
+
+  export type RemoveAllCallback = () => void
+  export type RemoveAll = (callback: RemoveAllCallback) => void
+}
+
+export interface RequestVideoQaduClass {
+  countTotalRequests: RequestVideoQaduMethods.CountTotalRequests
+  listWithLimitAndRandom: RequestVideoQaduMethods.ListWithLimitAndRandom
+  removeByRequestIdsAndPod: RequestVideoQaduMethods.RemoveByRequestIdsAndPod
+  removeAll: RequestVideoQaduMethods.RemoveAll
+}
+
+export interface RequestVideoQaduAttributes {
+  type: string
+}
+
+export interface RequestVideoQaduInstance extends RequestVideoQaduClass, RequestVideoQaduAttributes, Sequelize.Instance<RequestVideoQaduAttributes> {
+  id: number
+
+  Pod: PodInstance
+  Video: VideoInstance
+}
+
+export interface RequestVideoQaduModel extends RequestVideoQaduClass, Sequelize.Model<RequestVideoQaduInstance, RequestVideoQaduAttributes> {}
diff --git a/server/models/request/request-video-qadu.ts b/server/models/request/request-video-qadu.ts
new file mode 100644
index 000000000..da62239f5
--- /dev/null
+++ b/server/models/request/request-video-qadu.ts
@@ -0,0 +1,164 @@
+/*
+  Request Video for Quick And Dirty Updates like:
+   - views
+   - likes
+   - dislikes
+
+  We can't put it in the same system than basic requests for efficiency.
+  Moreover we don't want to slow down the basic requests with a lot of views/likes/dislikes requests.
+  So we put it an independant request scheduler.
+*/
+
+import { values } from 'lodash'
+import * as Sequelize from 'sequelize'
+
+import { database as db } from '../../initializers/database'
+import { REQUEST_VIDEO_QADU_TYPES } from '../../initializers'
+import { addMethodsToModel } from '../utils'
+import {
+  RequestVideoQaduClass,
+  RequestVideoQaduInstance,
+  RequestVideoQaduAttributes,
+
+  RequestVideoQaduMethods
+} from './request-video-qadu-interface'
+
+let RequestVideoQadu: Sequelize.Model<RequestVideoQaduInstance, RequestVideoQaduAttributes>
+let countTotalRequests: RequestVideoQaduMethods.CountTotalRequests
+let listWithLimitAndRandom: RequestVideoQaduMethods.ListWithLimitAndRandom
+let removeByRequestIdsAndPod: RequestVideoQaduMethods.RemoveByRequestIdsAndPod
+let removeAll: RequestVideoQaduMethods.RemoveAll
+
+export default function (sequelize: Sequelize.Sequelize, DataTypes: Sequelize.DataTypes) {
+  RequestVideoQadu = sequelize.define<RequestVideoQaduInstance, RequestVideoQaduAttributes>('RequestVideoQadu',
+    {
+      type: {
+        type: DataTypes.ENUM(values(REQUEST_VIDEO_QADU_TYPES)),
+        allowNull: false
+      }
+    },
+    {
+      timestamps: false,
+      indexes: [
+        {
+          fields: [ 'podId' ]
+        },
+        {
+          fields: [ 'videoId' ]
+        }
+      ]
+    }
+  )
+
+  const classMethods = [
+    associate,
+
+    listWithLimitAndRandom,
+    countTotalRequests,
+    removeAll,
+    removeByRequestIdsAndPod
+  ]
+  addMethodsToModel(RequestVideoQadu, classMethods)
+
+  return RequestVideoQadu
+}
+
+// ------------------------------ STATICS ------------------------------
+
+function associate (models) {
+  RequestVideoQadu.belongsTo(models.Pod, {
+    foreignKey: {
+      name: 'podId',
+      allowNull: false
+    },
+    onDelete: 'CASCADE'
+  })
+
+  RequestVideoQadu.belongsTo(models.Video, {
+    foreignKey: {
+      name: 'videoId',
+      allowNull: false
+    },
+    onDelete: 'CASCADE'
+  })
+}
+
+countTotalRequests = function (callback: RequestVideoQaduMethods.CountTotalRequestsCallback) {
+  const query = {}
+  return RequestVideoQadu.count(query).asCallback(callback)
+}
+
+listWithLimitAndRandom = function (limitPods: number, limitRequestsPerPod: number, callback: RequestVideoQaduMethods.ListWithLimitAndRandomCallback) {
+  const Pod = db.Pod
+  const tableJoin = ''
+
+  Pod.listRandomPodIdsWithRequest(limitPods, 'RequestVideoQadus', tableJoin, function (err, podIds) {
+    if (err) return callback(err)
+
+    // We don't have friends that have requests
+    if (podIds.length === 0) return callback(null, [])
+
+    const query = {
+      include: [
+        {
+          model: RequestVideoQadu['sequelize'].models.Pod,
+          where: {
+            id: {
+              $in: podIds
+            }
+          }
+        },
+        {
+          model: RequestVideoQadu['sequelize'].models.Video
+        }
+      ]
+    }
+
+    RequestVideoQadu.findAll(query).asCallback(function (err, requests) {
+      if (err) return callback(err)
+
+      const requestsGrouped = groupAndTruncateRequests(requests, limitRequestsPerPod)
+      return callback(err, requestsGrouped)
+    })
+  })
+}
+
+removeByRequestIdsAndPod = function (ids: number[], podId: number, callback: RequestVideoQaduMethods.RemoveByRequestIdsAndPodCallback) {
+  const query = {
+    where: {
+      id: {
+        $in: ids
+      },
+      podId
+    }
+  }
+
+  RequestVideoQadu.destroy(query).asCallback(callback)
+}
+
+removeAll = function (callback: RequestVideoQaduMethods.RemoveAllCallback) {
+  // Delete all requests
+  RequestVideoQadu.truncate({ cascade: true }).asCallback(callback)
+}
+
+// ---------------------------------------------------------------------------
+
+function groupAndTruncateRequests (requests: RequestVideoQaduInstance[], limitRequestsPerPod: number) {
+  const requestsGrouped = {}
+
+  requests.forEach(function (request) {
+    const pod = request.Pod
+
+    if (!requestsGrouped[pod.id]) requestsGrouped[pod.id] = []
+
+    if (requestsGrouped[pod.id].length < limitRequestsPerPod) {
+      requestsGrouped[pod.id].push({
+        request: request,
+        video: request.Video,
+        pod
+      })
+    }
+  })
+
+  return requestsGrouped
+}
diff --git a/server/models/request/request.ts b/server/models/request/request.ts
new file mode 100644
index 000000000..66e7da845
--- /dev/null
+++ b/server/models/request/request.ts
@@ -0,0 +1,150 @@
+import { values } from 'lodash'
+import * as Sequelize from 'sequelize'
+
+import { database as db } from '../../initializers/database'
+import { REQUEST_ENDPOINTS } from '../../initializers'
+import { addMethodsToModel } from '../utils'
+import {
+  RequestClass,
+  RequestInstance,
+  RequestAttributes,
+
+  RequestMethods,
+  RequestsGrouped
+} from './request-interface'
+
+let Request: Sequelize.Model<RequestInstance, RequestAttributes>
+let countTotalRequests: RequestMethods.CountTotalRequests
+let listWithLimitAndRandom: RequestMethods.ListWithLimitAndRandom
+let removeWithEmptyTo: RequestMethods.RemoveWithEmptyTo
+let removeAll: RequestMethods.RemoveAll
+
+export default function (sequelize: Sequelize.Sequelize, DataTypes: Sequelize.DataTypes) {
+  Request = sequelize.define<RequestInstance, RequestAttributes>('Request',
+    {
+      request: {
+        type: DataTypes.JSON,
+        allowNull: false
+      },
+      endpoint: {
+        type: DataTypes.ENUM(values(REQUEST_ENDPOINTS)),
+        allowNull: false
+      }
+    }
+  )
+
+  const classMethods = [
+    associate,
+
+    listWithLimitAndRandom,
+
+    countTotalRequests,
+    removeAll,
+    removeWithEmptyTo
+  ]
+  addMethodsToModel(Request, classMethods)
+
+  return Request
+}
+
+// ------------------------------ STATICS ------------------------------
+
+function associate (models) {
+  Request.belongsToMany(models.Pod, {
+    foreignKey: {
+      name: 'requestId',
+      allowNull: false
+    },
+    through: models.RequestToPod,
+    onDelete: 'CASCADE'
+  })
+}
+
+countTotalRequests = function (callback: RequestMethods.CountTotalRequestsCallback) {
+  // We need to include Pod because there are no cascade delete when a pod is removed
+  // So we could count requests that do not have existing pod anymore
+  const query = {
+    include: [ Request['sequelize'].models.Pod ]
+  }
+
+  return Request.count(query).asCallback(callback)
+}
+
+listWithLimitAndRandom = function (limitPods: number, limitRequestsPerPod: number, callback: RequestMethods.ListWithLimitAndRandomCallback) {
+  const Pod = db.Pod
+  const tableJoin = ''
+
+  Pod.listRandomPodIdsWithRequest(limitPods, 'RequestToPods', '', function (err, podIds) {
+    if (err) return callback(err)
+
+    // We don't have friends that have requests
+    if (podIds.length === 0) return callback(null, [])
+
+    // The first x requests of these pods
+    // It is very important to sort by id ASC to keep the requests order!
+    const query = {
+      order: [
+        [ 'id', 'ASC' ]
+      ],
+      include: [
+        {
+          model: Request['sequelize'].models.Pod,
+          where: {
+            id: {
+              $in: podIds
+            }
+          }
+        }
+      ]
+    }
+
+    Request.findAll(query).asCallback(function (err, requests) {
+      if (err) return callback(err)
+
+      const requestsGrouped = groupAndTruncateRequests(requests, limitRequestsPerPod)
+      return callback(err, requestsGrouped)
+    })
+  })
+}
+
+removeAll = function (callback: RequestMethods.RemoveAllCallback) {
+  // Delete all requests
+  Request.truncate({ cascade: true }).asCallback(callback)
+}
+
+removeWithEmptyTo = function (callback?: RequestMethods.RemoveWithEmptyToCallback) {
+  if (!callback) callback = function () { /* empty */ }
+
+  const query = {
+    where: {
+      id: {
+        $notIn: [
+          Sequelize.literal('SELECT "requestId" FROM "RequestToPods"')
+        ]
+      }
+    }
+  }
+
+  Request.destroy(query).asCallback(callback)
+}
+
+// ---------------------------------------------------------------------------
+
+function groupAndTruncateRequests (requests: RequestInstance[], limitRequestsPerPod: number) {
+  const requestsGrouped: RequestsGrouped = {}
+
+  requests.forEach(function (request) {
+    request.Pods.forEach(function (pod) {
+      if (!requestsGrouped[pod.id]) requestsGrouped[pod.id] = []
+
+      if (requestsGrouped[pod.id].length < limitRequestsPerPod) {
+        requestsGrouped[pod.id].push({
+          request,
+          pod
+        })
+      }
+    })
+  })
+
+  return requestsGrouped
+}