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1 | ;(function () { |
2 | 'use strict' | |
3 | ||
4 | var async = require('async') | |
5 | var config = require('config') | |
6 | var fs = require('fs') | |
7 | var request = require('request') | |
8 | ||
9 | var constants = require('../initializers/constants') | |
10 | var logger = require('../helpers/logger') | |
11 | var Pods = require('../models/pods') | |
12 | var PoolRequests = require('../models/poolRequests') | |
13 | var poolRequests = require('../lib/poolRequests') | |
14 | var utils = require('../helpers/utils') | |
15 | var Videos = require('../models/videos') | |
16 | ||
17 | var http = config.get('webserver.https') ? 'https' : 'http' | |
18 | var host = config.get('webserver.host') | |
19 | var port = config.get('webserver.port') | |
20 | ||
21 | var pods = { | |
22 | addVideoToFriends: addVideoToFriends, | |
23 | hasFriends: hasFriends, | |
24 | makeFriends: makeFriends, | |
25 | quitFriends: quitFriends, | |
26 | removeVideoToFriends: removeVideoToFriends | |
27 | } | |
28 | ||
29 | function addVideoToFriends (video) { | |
30 | // To avoid duplicates | |
31 | var id = video.name + video.magnetUri | |
32 | // namePath is null | |
33 | // TODO | |
34 | video.namePath = null | |
35 | PoolRequests.addRequest(id, 'add', video) | |
36 | } | |
37 | ||
38 | function hasFriends (callback) { | |
39 | Pods.count(function (err, count) { | |
40 | if (err) return callback(err) | |
41 | ||
42 | var has_friends = (count !== 0) | |
43 | callback(null, has_friends) | |
44 | }) | |
45 | } | |
46 | ||
47 | function makeFriends (callback) { | |
48 | var pods_score = {} | |
49 | ||
50 | logger.info('Make friends!') | |
51 | fs.readFile(utils.getCertDir() + 'peertube.pub', 'utf8', function (err, cert) { | |
52 | if (err) { | |
53 | logger.error('Cannot read public cert.', { error: err }) | |
54 | return callback(err) | |
55 | } | |
56 | ||
57 | var urls = config.get('network.friends') | |
58 | ||
59 | async.each(urls, computeForeignPodsList, function () { | |
60 | logger.debug('Pods scores computed.', { pods_score: pods_score }) | |
61 | var pods_list = computeWinningPods(urls, pods_score) | |
62 | logger.debug('Pods that we keep computed.', { pods_to_keep: pods_list }) | |
63 | ||
64 | makeRequestsToWinningPods(cert, pods_list) | |
65 | }) | |
66 | }) | |
67 | ||
68 | // ----------------------------------------------------------------------- | |
69 | ||
70 | function computeForeignPodsList (url, callback) { | |
71 | // Let's give 1 point to the pod we ask the friends list | |
72 | pods_score[url] = 1 | |
73 | ||
74 | getForeignPodsList(url, function (foreign_pods_list) { | |
75 | if (foreign_pods_list.length === 0) return callback() | |
76 | ||
77 | async.each(foreign_pods_list, function (foreign_pod, callback_each) { | |
78 | var foreign_url = foreign_pod.url | |
79 | ||
80 | if (pods_score[foreign_url]) pods_score[foreign_url]++ | |
81 | else pods_score[foreign_url] = 1 | |
82 | ||
83 | callback_each() | |
84 | }, function () { | |
85 | callback() | |
86 | }) | |
87 | }) | |
88 | } | |
89 | ||
90 | function computeWinningPods (urls, pods_score) { | |
91 | // Build the list of pods to add | |
92 | // Only add a pod if it exists in more than a half base pods | |
93 | var pods_list = [] | |
94 | var base_score = urls.length / 2 | |
95 | Object.keys(pods_score).forEach(function (pod) { | |
96 | if (pods_score[pod] > base_score) pods_list.push({ url: pod }) | |
97 | }) | |
98 | ||
99 | return pods_list | |
100 | } | |
101 | ||
102 | function makeRequestsToWinningPods (cert, pods_list) { | |
103 | // Stop pool requests | |
104 | poolRequests.deactivate() | |
105 | // Flush pool requests | |
106 | poolRequests.forceSend() | |
107 | ||
108 | // Get the list of our videos to send to our new friends | |
109 | Videos.listOwned(function (err, videos_list) { | |
110 | if (err) throw err | |
111 | ||
112 | var data = { | |
113 | url: http + '://' + host + ':' + port, | |
114 | publicKey: cert, | |
115 | videos: videos_list | |
116 | } | |
117 | ||
118 | utils.makeMultipleRetryRequest( | |
119 | { method: 'POST', path: '/api/' + constants.API_VERSION + '/pods/', data: data }, | |
120 | ||
121 | pods_list, | |
122 | ||
123 | function eachRequest (err, response, body, url, pod, callback_each_request) { | |
124 | // We add the pod if it responded correctly with its public certificate | |
125 | if (!err && response.statusCode === 200) { | |
126 | Pods.add({ url: pod.url, publicKey: body.cert, score: constants.FRIEND_BASE_SCORE }, function (err) { | |
127 | if (err) logger.error('Error with adding %s pod.', pod.url, { error: err }) | |
128 | ||
129 | Videos.addRemotes(body.videos, function (err) { | |
130 | if (err) logger.error('Error with adding videos of pod.', pod.url, { error: err }) | |
131 | ||
132 | logger.debug('Adding remote videos from %s.', pod.url, { videos: body.videos }) | |
133 | return callback_each_request() | |
134 | }) | |
135 | }) | |
136 | } else { | |
137 | logger.error('Error with adding %s pod.', pod.url, { error: err || new Error('Status not 200') }) | |
138 | return callback_each_request() | |
139 | } | |
140 | }, | |
141 | ||
142 | function endRequests (err) { | |
143 | // Now we made new friends, we can re activate the pool of requests | |
144 | poolRequests.activate() | |
145 | ||
146 | if (err) { | |
147 | logger.error('There was some errors when we wanted to make friends.', { error: err }) | |
148 | return callback(err) | |
149 | } | |
150 | ||
151 | logger.debug('makeRequestsToWinningPods finished.') | |
152 | return callback(null) | |
153 | } | |
154 | ) | |
155 | }) | |
156 | } | |
157 | } | |
158 | ||
159 | function quitFriends (callback) { | |
160 | // Stop pool requests | |
161 | poolRequests.deactivate() | |
162 | // Flush pool requests | |
163 | poolRequests.forceSend() | |
164 | ||
165 | Pods.list(function (err, pods) { | |
166 | if (err) return callback(err) | |
167 | ||
168 | var request = { | |
169 | method: 'POST', | |
170 | path: '/api/' + constants.API_VERSION + '/pods/remove', | |
171 | sign: true, | |
172 | encrypt: true, | |
173 | data: { | |
174 | url: 'me' // Fake data | |
175 | } | |
176 | } | |
177 | ||
178 | // Announce we quit them | |
179 | utils.makeMultipleRetryRequest(request, pods, function () { | |
180 | Pods.removeAll(function (err) { | |
181 | poolRequests.activate() | |
182 | ||
183 | if (err) return callback(err) | |
184 | ||
185 | logger.info('Broke friends, so sad :(') | |
186 | ||
187 | Videos.removeAllRemotes(function (err) { | |
188 | if (err) return callback(err) | |
189 | ||
190 | logger.info('Removed all remote videos.') | |
191 | callback(null) | |
192 | }) | |
193 | }) | |
194 | }) | |
195 | }) | |
196 | } | |
197 | ||
198 | function removeVideoToFriends (video) { | |
199 | // To avoid duplicates | |
200 | var id = video.name + video.magnetUri | |
201 | PoolRequests.addRequest(id, 'remove', video) | |
202 | } | |
203 | ||
204 | // --------------------------------------------------------------------------- | |
205 | ||
206 | module.exports = pods | |
207 | ||
208 | // --------------------------------------------------------------------------- | |
209 | ||
210 | function getForeignPodsList (url, callback) { | |
211 | var path = '/api/' + constants.API_VERSION + '/pods' | |
212 | ||
213 | request.get(url + path, function (err, response, body) { | |
214 | if (err) throw err | |
215 | callback(JSON.parse(body)) | |
216 | }) | |
217 | } | |
218 | })() |