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;(function () {
'use strict'
var async = require('async')
var config = require('config')
var fs = require('fs')
var request = require('request')
var constants = require('../initializers/constants')
var logger = require('../helpers/logger')
var peertubeCrypto = require('../helpers/peertubeCrypto')
var Pods = require('../models/pods')
var poolRequests = require('../lib/poolRequests')
var requests = require('../helpers/requests')
var Videos = require('../models/videos')
var http = config.get('webserver.https') ? 'https' : 'http'
var host = config.get('webserver.host')
var port = config.get('webserver.port')
var pods = {
addVideoToFriends: addVideoToFriends,
hasFriends: hasFriends,
makeFriends: makeFriends,
quitFriends: quitFriends,
removeVideoToFriends: removeVideoToFriends
}
function addVideoToFriends (video) {
// To avoid duplicates
var id = video.name + video.magnetUri
// ensure namePath is null
video.namePath = null
poolRequests.addRequest(id, 'add', video)
}
function hasFriends (callback) {
Pods.count(function (err, count) {
if (err) return callback(err)
var has_friends = (count !== 0)
callback(null, has_friends)
})
}
function makeFriends (callback) {
var pods_score = {}
logger.info('Make friends!')
fs.readFile(peertubeCrypto.getCertDir() + 'peertube.pub', 'utf8', function (err, cert) {
if (err) {
logger.error('Cannot read public cert.')
return callback(err)
}
var urls = config.get('network.friends')
async.each(urls, computeForeignPodsList, function (err) {
if (err) return callback(err)
logger.debug('Pods scores computed.', { pods_score: pods_score })
var pods_list = computeWinningPods(urls, pods_score)
logger.debug('Pods that we keep computed.', { pods_to_keep: pods_list })
makeRequestsToWinningPods(cert, pods_list)
})
})
// -----------------------------------------------------------------------
function computeForeignPodsList (url, callback) {
// Let's give 1 point to the pod we ask the friends list
pods_score[url] = 1
getForeignPodsList(url, function (err, foreign_pods_list) {
if (err) return callback(err)
if (foreign_pods_list.length === 0) return callback()
async.each(foreign_pods_list, function (foreign_pod, callback_each) {
var foreign_url = foreign_pod.url
if (pods_score[foreign_url]) pods_score[foreign_url]++
else pods_score[foreign_url] = 1
callback_each()
}, function () {
callback()
})
})
}
function computeWinningPods (urls, pods_score) {
// Build the list of pods to add
// Only add a pod if it exists in more than a half base pods
var pods_list = []
var base_score = urls.length / 2
Object.keys(pods_score).forEach(function (pod) {
if (pods_score[pod] > base_score) pods_list.push({ url: pod })
})
return pods_list
}
function makeRequestsToWinningPods (cert, pods_list) {
// Stop pool requests
poolRequests.deactivate()
// Flush pool requests
poolRequests.forceSend()
// Get the list of our videos to send to our new friends
Videos.listOwned(function (err, videos_list) {
if (err) {
logger.error('Cannot get the list of videos we own.')
return callback(err)
}
var data = {
url: http + '://' + host + ':' + port,
publicKey: cert,
videos: videos_list
}
requests.makeMultipleRetryRequest(
{ method: 'POST', path: '/api/' + constants.API_VERSION + '/pods/', data: data },
pods_list,
function eachRequest (err, response, body, url, pod, callback_each_request) {
// We add the pod if it responded correctly with its public certificate
if (!err && response.statusCode === 200) {
Pods.add({ url: pod.url, publicKey: body.cert, score: constants.FRIEND_BASE_SCORE }, function (err) {
if (err) logger.error('Error with adding %s pod.', pod.url, { error: err })
Videos.addRemotes(body.videos, function (err) {
if (err) logger.error('Error with adding videos of pod.', pod.url, { error: err })
logger.debug('Adding remote videos from %s.', pod.url, { videos: body.videos })
return callback_each_request()
})
})
} else {
logger.error('Error with adding %s pod.', pod.url, { error: err || new Error('Status not 200') })
return callback_each_request()
}
},
function endRequests (err) {
// Now we made new friends, we can re activate the pool of requests
poolRequests.activate()
if (err) {
logger.error('There was some errors when we wanted to make friends.')
return callback(err)
}
logger.debug('makeRequestsToWinningPods finished.')
return callback(null)
}
)
})
}
}
function quitFriends (callback) {
// Stop pool requests
poolRequests.deactivate()
// Flush pool requests
poolRequests.forceSend()
Pods.list(function (err, pods) {
if (err) return callback(err)
var request = {
method: 'POST',
path: '/api/' + constants.API_VERSION + '/pods/remove',
sign: true,
encrypt: true,
data: {
url: 'me' // Fake data
}
}
// Announce we quit them
requests.makeMultipleRetryRequest(request, pods, function () {
Pods.removeAll(function (err) {
poolRequests.activate()
if (err) return callback(err)
logger.info('Broke friends, so sad :(')
Videos.removeAllRemotes(function (err) {
if (err) return callback(err)
logger.info('Removed all remote videos.')
callback(null)
})
})
})
})
}
function removeVideoToFriends (video) {
// To avoid duplicates
var id = video.name + video.magnetUri
poolRequests.addRequest(id, 'remove', video)
}
// ---------------------------------------------------------------------------
module.exports = pods
// ---------------------------------------------------------------------------
function getForeignPodsList (url, callback) {
var path = '/api/' + constants.API_VERSION + '/pods'
request.get(url + path, function (err, response, body) {
if (err) return callback(err)
callback(null, JSON.parse(body))
})
}
})()
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