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1 | 'use strict' | |
2 | ||
3 | const each = require('async/each') | |
4 | const map = require('lodash/map') | |
5 | const waterfall = require('async/waterfall') | |
6 | ||
7 | const constants = require('../initializers/constants') | |
8 | const logger = require('../helpers/logger') | |
9 | const customPodsValidators = require('../helpers/custom-validators').pods | |
10 | ||
11 | // --------------------------------------------------------------------------- | |
12 | ||
13 | module.exports = function (sequelize, DataTypes) { | |
14 | const Pod = sequelize.define('Pod', | |
15 | { | |
16 | host: { | |
17 | type: DataTypes.STRING, | |
18 | allowNull: false, | |
19 | validate: { | |
20 | isHost: function (value) { | |
21 | const res = customPodsValidators.isHostValid(value) | |
22 | if (res === false) throw new Error('Host not valid.') | |
23 | } | |
24 | } | |
25 | }, | |
26 | publicKey: { | |
27 | type: DataTypes.STRING(5000), | |
28 | allowNull: false | |
29 | }, | |
30 | score: { | |
31 | type: DataTypes.INTEGER, | |
32 | defaultValue: constants.FRIEND_SCORE.BASE, | |
33 | allowNull: false, | |
34 | validate: { | |
35 | isInt: true, | |
36 | max: constants.FRIEND_SCORE.MAX | |
37 | } | |
38 | }, | |
39 | email: { | |
40 | type: DataTypes.STRING(400), | |
41 | allowNull: false, | |
42 | validate: { | |
43 | isEmail: true | |
44 | } | |
45 | } | |
46 | }, | |
47 | { | |
48 | indexes: [ | |
49 | { | |
50 | fields: [ 'host' ], | |
51 | unique: true | |
52 | }, | |
53 | { | |
54 | fields: [ 'score' ] | |
55 | } | |
56 | ], | |
57 | classMethods: { | |
58 | associate, | |
59 | ||
60 | countAll, | |
61 | incrementScores, | |
62 | list, | |
63 | listAllIds, | |
64 | listRandomPodIdsWithRequest, | |
65 | listBadPods, | |
66 | load, | |
67 | loadByHost, | |
68 | updatePodsScore, | |
69 | removeAll | |
70 | }, | |
71 | instanceMethods: { | |
72 | toFormatedJSON | |
73 | } | |
74 | } | |
75 | ) | |
76 | ||
77 | return Pod | |
78 | } | |
79 | ||
80 | // ------------------------------ METHODS ------------------------------ | |
81 | ||
82 | function toFormatedJSON () { | |
83 | const json = { | |
84 | id: this.id, | |
85 | host: this.host, | |
86 | email: this.email, | |
87 | score: this.score, | |
88 | createdAt: this.createdAt | |
89 | } | |
90 | ||
91 | return json | |
92 | } | |
93 | ||
94 | // ------------------------------ Statics ------------------------------ | |
95 | ||
96 | function associate (models) { | |
97 | this.belongsToMany(models.Request, { | |
98 | foreignKey: 'podId', | |
99 | through: models.RequestToPod, | |
100 | onDelete: 'cascade' | |
101 | }) | |
102 | } | |
103 | ||
104 | function countAll (callback) { | |
105 | return this.count().asCallback(callback) | |
106 | } | |
107 | ||
108 | function incrementScores (ids, value, callback) { | |
109 | if (!callback) callback = function () {} | |
110 | ||
111 | const update = { | |
112 | score: this.sequelize.literal('score +' + value) | |
113 | } | |
114 | ||
115 | const options = { | |
116 | where: { | |
117 | id: { | |
118 | $in: ids | |
119 | } | |
120 | }, | |
121 | // In this case score is a literal and not an integer so we do not validate it | |
122 | validate: false | |
123 | } | |
124 | ||
125 | return this.update(update, options).asCallback(callback) | |
126 | } | |
127 | ||
128 | function list (callback) { | |
129 | return this.findAll().asCallback(callback) | |
130 | } | |
131 | ||
132 | function listAllIds (transaction, callback) { | |
133 | if (!callback) { | |
134 | callback = transaction | |
135 | transaction = null | |
136 | } | |
137 | ||
138 | const query = { | |
139 | attributes: [ 'id' ] | |
140 | } | |
141 | ||
142 | if (transaction) query.transaction = transaction | |
143 | ||
144 | return this.findAll(query).asCallback(function (err, pods) { | |
145 | if (err) return callback(err) | |
146 | ||
147 | return callback(null, map(pods, 'id')) | |
148 | }) | |
149 | } | |
150 | ||
151 | function listRandomPodIdsWithRequest (limit, tableWithPods, tableWithPodsJoins, callback) { | |
152 | if (!callback) { | |
153 | callback = tableWithPodsJoins | |
154 | tableWithPodsJoins = '' | |
155 | } | |
156 | ||
157 | const self = this | |
158 | ||
159 | self.count().asCallback(function (err, count) { | |
160 | if (err) return callback(err) | |
161 | ||
162 | // Optimization... | |
163 | if (count === 0) return callback(null, []) | |
164 | ||
165 | let start = Math.floor(Math.random() * count) - limit | |
166 | if (start < 0) start = 0 | |
167 | ||
168 | const query = { | |
169 | attributes: [ 'id' ], | |
170 | order: [ | |
171 | [ 'id', 'ASC' ] | |
172 | ], | |
173 | offset: start, | |
174 | limit: limit, | |
175 | where: { | |
176 | id: { | |
177 | $in: [ | |
178 | this.sequelize.literal(`SELECT DISTINCT "${tableWithPods}"."podId" FROM "${tableWithPods}" ${tableWithPodsJoins}`) | |
179 | ] | |
180 | } | |
181 | } | |
182 | } | |
183 | ||
184 | return this.findAll(query).asCallback(function (err, pods) { | |
185 | if (err) return callback(err) | |
186 | ||
187 | return callback(null, map(pods, 'id')) | |
188 | }) | |
189 | }) | |
190 | } | |
191 | ||
192 | function listBadPods (callback) { | |
193 | const query = { | |
194 | where: { | |
195 | score: { $lte: 0 } | |
196 | } | |
197 | } | |
198 | ||
199 | return this.findAll(query).asCallback(callback) | |
200 | } | |
201 | ||
202 | function load (id, callback) { | |
203 | return this.findById(id).asCallback(callback) | |
204 | } | |
205 | ||
206 | function loadByHost (host, callback) { | |
207 | const query = { | |
208 | where: { | |
209 | host: host | |
210 | } | |
211 | } | |
212 | ||
213 | return this.findOne(query).asCallback(callback) | |
214 | } | |
215 | ||
216 | function removeAll (callback) { | |
217 | return this.destroy().asCallback(callback) | |
218 | } | |
219 | ||
220 | function updatePodsScore (goodPods, badPods) { | |
221 | const self = this | |
222 | ||
223 | logger.info('Updating %d good pods and %d bad pods scores.', goodPods.length, badPods.length) | |
224 | ||
225 | if (goodPods.length !== 0) { | |
226 | this.incrementScores(goodPods, constants.PODS_SCORE.BONUS, function (err) { | |
227 | if (err) logger.error('Cannot increment scores of good pods.', { error: err }) | |
228 | }) | |
229 | } | |
230 | ||
231 | if (badPods.length !== 0) { | |
232 | this.incrementScores(badPods, constants.PODS_SCORE.MALUS, function (err) { | |
233 | if (err) logger.error('Cannot decrement scores of bad pods.', { error: err }) | |
234 | removeBadPods.call(self) | |
235 | }) | |
236 | } | |
237 | } | |
238 | ||
239 | // --------------------------------------------------------------------------- | |
240 | ||
241 | // Remove pods with a score of 0 (too many requests where they were unreachable) | |
242 | function removeBadPods () { | |
243 | const self = this | |
244 | ||
245 | waterfall([ | |
246 | function findBadPods (callback) { | |
247 | self.sequelize.models.Pod.listBadPods(function (err, pods) { | |
248 | if (err) { | |
249 | logger.error('Cannot find bad pods.', { error: err }) | |
250 | return callback(err) | |
251 | } | |
252 | ||
253 | return callback(null, pods) | |
254 | }) | |
255 | }, | |
256 | ||
257 | function removeTheseBadPods (pods, callback) { | |
258 | each(pods, function (pod, callbackEach) { | |
259 | pod.destroy().asCallback(callbackEach) | |
260 | }, function (err) { | |
261 | return callback(err, pods.length) | |
262 | }) | |
263 | } | |
264 | ], function (err, numberOfPodsRemoved) { | |
265 | if (err) { | |
266 | logger.error('Cannot remove bad pods.', { error: err }) | |
267 | } else if (numberOfPodsRemoved) { | |
268 | logger.info('Removed %d pods.', numberOfPodsRemoved) | |
269 | } else { | |
270 | logger.info('No need to remove bad pods.') | |
271 | } | |
272 | }) | |
273 | } |