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