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1 | /* | |
2 | Request Video events (likes, dislikes, views...) | |
3 | */ | |
4 | ||
5 | import { values } from 'lodash' | |
6 | import * as Sequelize from 'sequelize' | |
7 | ||
8 | import { database as db } from '../initializers/database' | |
9 | import { REQUEST_VIDEO_EVENT_TYPES } from '../initializers' | |
10 | import { isVideoEventCountValid } from '../helpers' | |
11 | import { addMethodsToModel } from './utils' | |
12 | import { | |
13 | RequestVideoEventClass, | |
14 | RequestVideoEventInstance, | |
15 | RequestVideoEventAttributes, | |
16 | ||
17 | RequestVideoEventMethods, | |
18 | RequestsVideoEventGrouped | |
19 | } from './request-video-event-interface' | |
20 | ||
21 | let RequestVideoEvent: Sequelize.Model<RequestVideoEventInstance, RequestVideoEventAttributes> | |
22 | let countTotalRequests: RequestVideoEventMethods.CountTotalRequests | |
23 | let listWithLimitAndRandom: RequestVideoEventMethods.ListWithLimitAndRandom | |
24 | let removeByRequestIdsAndPod: RequestVideoEventMethods.RemoveByRequestIdsAndPod | |
25 | let removeAll: RequestVideoEventMethods.RemoveAll | |
26 | ||
27 | export default function (sequelize: Sequelize.Sequelize, DataTypes: Sequelize.DataTypes) { | |
28 | RequestVideoEvent = sequelize.define<RequestVideoEventInstance, RequestVideoEventAttributes>('RequestVideoEvent', | |
29 | { | |
30 | type: { | |
31 | type: DataTypes.ENUM(values(REQUEST_VIDEO_EVENT_TYPES)), | |
32 | allowNull: false | |
33 | }, | |
34 | count: { | |
35 | type: DataTypes.INTEGER, | |
36 | allowNull: false, | |
37 | validate: { | |
38 | countValid: function (value) { | |
39 | const res = isVideoEventCountValid(value) | |
40 | if (res === false) throw new Error('Video event count is not valid.') | |
41 | } | |
42 | } | |
43 | } | |
44 | }, | |
45 | { | |
46 | updatedAt: false, | |
47 | indexes: [ | |
48 | { | |
49 | fields: [ 'videoId' ] | |
50 | } | |
51 | ] | |
52 | } | |
53 | ) | |
54 | ||
55 | const classMethods = [ | |
56 | associate, | |
57 | ||
58 | listWithLimitAndRandom, | |
59 | countTotalRequests, | |
60 | removeAll, | |
61 | removeByRequestIdsAndPod | |
62 | ] | |
63 | addMethodsToModel(RequestVideoEvent, classMethods) | |
64 | ||
65 | return RequestVideoEvent | |
66 | } | |
67 | ||
68 | // ------------------------------ STATICS ------------------------------ | |
69 | ||
70 | function associate (models) { | |
71 | RequestVideoEvent.belongsTo(models.Video, { | |
72 | foreignKey: { | |
73 | name: 'videoId', | |
74 | allowNull: false | |
75 | }, | |
76 | onDelete: 'CASCADE' | |
77 | }) | |
78 | } | |
79 | ||
80 | countTotalRequests = function (callback: RequestVideoEventMethods.CountTotalRequestsCallback) { | |
81 | const query = {} | |
82 | return RequestVideoEvent.count(query).asCallback(callback) | |
83 | } | |
84 | ||
85 | listWithLimitAndRandom = function (limitPods: number, limitRequestsPerPod: number, callback: RequestVideoEventMethods.ListWithLimitAndRandomCallback) { | |
86 | const Pod = db.Pod | |
87 | ||
88 | // We make a join between videos and authors to find the podId of our video event requests | |
89 | const podJoins = 'INNER JOIN "Videos" ON "Videos"."authorId" = "Authors"."id" ' + | |
90 | 'INNER JOIN "RequestVideoEvents" ON "RequestVideoEvents"."videoId" = "Videos"."id"' | |
91 | ||
92 | Pod.listRandomPodIdsWithRequest(limitPods, 'Authors', podJoins, function (err, podIds) { | |
93 | if (err) return callback(err) | |
94 | ||
95 | // We don't have friends that have requests | |
96 | if (podIds.length === 0) return callback(null, []) | |
97 | ||
98 | const query = { | |
99 | order: [ | |
100 | [ 'id', 'ASC' ] | |
101 | ], | |
102 | include: [ | |
103 | { | |
104 | model: RequestVideoEvent['sequelize'].models.Video, | |
105 | include: [ | |
106 | { | |
107 | model: RequestVideoEvent['sequelize'].models.Author, | |
108 | include: [ | |
109 | { | |
110 | model: RequestVideoEvent['sequelize'].models.Pod, | |
111 | where: { | |
112 | id: { | |
113 | $in: podIds | |
114 | } | |
115 | } | |
116 | } | |
117 | ] | |
118 | } | |
119 | ] | |
120 | } | |
121 | ] | |
122 | } | |
123 | ||
124 | RequestVideoEvent.findAll(query).asCallback(function (err, requests) { | |
125 | if (err) return callback(err) | |
126 | ||
127 | const requestsGrouped = groupAndTruncateRequests(requests, limitRequestsPerPod) | |
128 | return callback(err, requestsGrouped) | |
129 | }) | |
130 | }) | |
131 | } | |
132 | ||
133 | removeByRequestIdsAndPod = function (ids: number[], podId: number, callback: RequestVideoEventMethods.RemoveByRequestIdsAndPodCallback) { | |
134 | const query = { | |
135 | where: { | |
136 | id: { | |
137 | $in: ids | |
138 | } | |
139 | }, | |
140 | include: [ | |
141 | { | |
142 | model: RequestVideoEvent['sequelize'].models.Video, | |
143 | include: [ | |
144 | { | |
145 | model: RequestVideoEvent['sequelize'].models.Author, | |
146 | where: { | |
147 | podId | |
148 | } | |
149 | } | |
150 | ] | |
151 | } | |
152 | ] | |
153 | } | |
154 | ||
155 | RequestVideoEvent.destroy(query).asCallback(callback) | |
156 | } | |
157 | ||
158 | removeAll = function (callback: RequestVideoEventMethods.RemoveAllCallback) { | |
159 | // Delete all requests | |
160 | RequestVideoEvent.truncate({ cascade: true }).asCallback(callback) | |
161 | } | |
162 | ||
163 | // --------------------------------------------------------------------------- | |
164 | ||
165 | function groupAndTruncateRequests (events: RequestVideoEventInstance[], limitRequestsPerPod: number) { | |
166 | const eventsGrouped: RequestsVideoEventGrouped = {} | |
167 | ||
168 | events.forEach(function (event) { | |
169 | const pod = event.Video.Author.Pod | |
170 | ||
171 | if (!eventsGrouped[pod.id]) eventsGrouped[pod.id] = [] | |
172 | ||
173 | if (eventsGrouped[pod.id].length < limitRequestsPerPod) { | |
174 | eventsGrouped[pod.id].push({ | |
175 | id: event.id, | |
176 | type: event.type, | |
177 | count: event.count, | |
178 | video: event.Video, | |
179 | pod | |
180 | }) | |
181 | } | |
182 | }) | |
183 | ||
184 | return eventsGrouped | |
185 | } |