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
|
import { isTestInstance } from '@server/helpers/core-utils'
import { logger, loggerTagsFactory } from '@server/helpers/logger'
import { VIEW_LIFETIME } from '@server/initializers/constants'
import { sendView } from '@server/lib/activitypub/send/send-view'
import { PeerTubeSocket } from '@server/lib/peertube-socket'
import { getServerActor } from '@server/models/application/application'
import { VideoModel } from '@server/models/video/video'
import { MVideo } from '@server/types/models'
import { buildUUID, sha256 } from '@shared/extra-utils'
const lTags = loggerTagsFactory('views')
type Viewer = {
expires: number
id: string
lastFederation?: number
}
export class VideoViewerCounters {
// expires is new Date().getTime()
private readonly viewersPerVideo = new Map<number, Viewer[]>()
private readonly idToViewer = new Map<string, Viewer>()
private readonly salt = buildUUID()
private processingViewerCounters = false
constructor () {
setInterval(() => this.cleanViewerCounters(), VIEW_LIFETIME.VIEWER_COUNTER)
}
// ---------------------------------------------------------------------------
async addLocalViewer (options: {
video: MVideo
ip: string
}) {
const { video, ip } = options
logger.debug('Adding local viewer to video viewers counter %s.', video.uuid, { ...lTags(video.uuid) })
const viewerId = this.generateViewerId(ip, video.uuid)
const viewer = this.idToViewer.get(viewerId)
if (viewer) {
viewer.expires = this.buildViewerExpireTime()
await this.federateViewerIfNeeded(video, viewer)
return false
}
const newViewer = await this.addViewerToVideo({ viewerId, video })
await this.federateViewerIfNeeded(video, newViewer)
return true
}
async addRemoteViewer (options: {
video: MVideo
viewerId: string
viewerExpires: Date
}) {
const { video, viewerExpires, viewerId } = options
logger.debug('Adding remote viewer to video %s.', video.uuid, { ...lTags(video.uuid) })
await this.addViewerToVideo({ video, viewerExpires, viewerId })
return true
}
// ---------------------------------------------------------------------------
getViewers (video: MVideo) {
const viewers = this.viewersPerVideo.get(video.id)
if (!viewers) return 0
return viewers.length
}
buildViewerExpireTime () {
return new Date().getTime() + VIEW_LIFETIME.VIEWER_COUNTER
}
// ---------------------------------------------------------------------------
private async addViewerToVideo (options: {
video: MVideo
viewerId: string
viewerExpires?: Date
}) {
const { video, viewerExpires, viewerId } = options
let watchers = this.viewersPerVideo.get(video.id)
if (!watchers) {
watchers = []
this.viewersPerVideo.set(video.id, watchers)
}
const expires = viewerExpires
? viewerExpires.getTime()
: this.buildViewerExpireTime()
const viewer = { id: viewerId, expires }
watchers.push(viewer)
this.idToViewer.set(viewerId, viewer)
await this.notifyClients(video.id, watchers.length)
return viewer
}
private async cleanViewerCounters () {
if (this.processingViewerCounters) return
this.processingViewerCounters = true
if (!isTestInstance()) logger.info('Cleaning video viewers.', lTags())
try {
for (const videoId of this.viewersPerVideo.keys()) {
const notBefore = new Date().getTime()
const viewers = this.viewersPerVideo.get(videoId)
// Only keep not expired viewers
const newViewers: Viewer[] = []
// Filter new viewers
for (const viewer of viewers) {
if (viewer.expires > notBefore) {
newViewers.push(viewer)
} else {
this.idToViewer.delete(viewer.id)
}
}
if (newViewers.length === 0) this.viewersPerVideo.delete(videoId)
else this.viewersPerVideo.set(videoId, newViewers)
await this.notifyClients(videoId, newViewers.length)
}
} catch (err) {
logger.error('Error in video clean viewers scheduler.', { err, ...lTags() })
}
this.processingViewerCounters = false
}
private async notifyClients (videoId: string | number, viewersLength: number) {
const video = await VideoModel.loadImmutableAttributes(videoId)
if (!video) return
PeerTubeSocket.Instance.sendVideoViewsUpdate(video, viewersLength)
logger.debug('Video viewers update for %s is %d.', video.url, viewersLength, lTags())
}
private generateViewerId (ip: string, videoUUID: string) {
return sha256(this.salt + '-' + ip + '-' + videoUUID)
}
private async federateViewerIfNeeded (video: MVideo, viewer: Viewer) {
// Federate the viewer if it's been a "long" time we did not
const now = new Date().getTime()
const federationLimit = now - (VIEW_LIFETIME.VIEWER_COUNTER / 2)
if (viewer.lastFederation && viewer.lastFederation > federationLimit) return
await sendView({ byActor: await getServerActor(), video, type: 'viewer', viewerIdentifier: viewer.id })
viewer.lastFederation = now
}
}
|
