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'use strict'
const async = require('async')
const map = require('lodash/map')
const constants = require('../initializers/constants')
const logger = require('../helpers/logger')
const Pods = require('../models/pods')
const Requests = require('../models/requests')
const requests = require('../helpers/requests')
const videos = require('../lib/videos')
const Videos = require('../models/videos')
let timer = null
const requestsScheduler = {
activate: activate,
addRequest: addRequest,
deactivate: deactivate,
forceSend: forceSend
}
function activate () {
logger.info('Requests scheduler activated.')
timer = setInterval(makeRequests, constants.INTERVAL)
}
function addRequest (id, type, request) {
logger.debug('Add request to the requests scheduler.', { id: id, type: type, request: request })
Requests.findById(id, function (err, entity) {
if (err) {
logger.error('Cannot find one request.', { error: err })
return // Abort
}
if (entity) {
if (entity.type === type) {
logger.error('Cannot insert two same requests.')
return // Abort
}
// Remove the request of the other type
Requests.removeRequestById(id, function (err) {
if (err) {
logger.error('Cannot remove a request.', { error: err })
return // Abort
}
})
} else {
Requests.create(id, type, request, function (err) {
if (err) logger.error('Cannot create a request.', { error: err })
return // Abort
})
}
})
}
function deactivate () {
logger.info('Requests scheduler deactivated.')
clearInterval(timer)
}
function forceSend () {
logger.info('Force requests scheduler sending.')
makeRequests()
}
// ---------------------------------------------------------------------------
module.exports = requestsScheduler
// ---------------------------------------------------------------------------
function makeRequest (type, requestsToMake, callback) {
if (!callback) callback = function () {}
Pods.list(function (err, pods) {
if (err) return callback(err)
const params = {
encrypt: true,
sign: true,
method: 'POST',
path: null,
data: requestsToMake
}
if (type === 'add') {
params.path = '/api/' + constants.API_VERSION + '/remotevideos/add'
} else if (type === 'remove') {
params.path = '/api/' + constants.API_VERSION + '/remotevideos/remove'
} else {
return callback(new Error('Unkown pool request type.'))
}
const badPods = []
const goodPods = []
requests.makeMultipleRetryRequest(params, pods, callbackEachPodFinished, callbackAllPodsFinished)
function callbackEachPodFinished (err, response, body, url, pod, callbackEachPodFinished) {
if (err || (response.statusCode !== 200 && response.statusCode !== 201 && response.statusCode !== 204)) {
badPods.push(pod._id)
logger.error('Error sending secure request to %s pod.', url, { error: err || new Error('Status code not 20x') })
} else {
goodPods.push(pod._id)
}
return callbackEachPodFinished()
}
function callbackAllPodsFinished (err) {
if (err) return callback(err)
updatePodsScore(goodPods, badPods)
callback(null)
}
})
}
function makeRequests () {
logger.info('Making requests to friends.')
Requests.list(function (err, requests) {
if (err) {
logger.error('Cannot get the list of requests.', { err: err })
return // Abort
}
if (requests.length === 0) return
const requestsToMake = {
add: {
ids: [],
requests: []
},
remove: {
ids: [],
requests: []
}
}
async.each(requests, function (poolRequest, callbackEach) {
if (poolRequest.type === 'add') {
requestsToMake.add.requests.push(poolRequest.request)
requestsToMake.add.ids.push(poolRequest._id)
} else if (poolRequest.type === 'remove') {
requestsToMake.remove.requests.push(poolRequest.request)
requestsToMake.remove.ids.push(poolRequest._id)
} else {
logger.error('Unkown request type.', { request_type: poolRequest.type })
return // abort
}
callbackEach()
}, function () {
// Send the add requests
if (requestsToMake.add.requests.length !== 0) {
makeRequest('add', requestsToMake.add.requests, function (err) {
if (err) logger.error('Errors when sent add requests.', { error: err })
Requests.removeRequests(requestsToMake.add.ids)
})
}
// Send the remove requests
if (requestsToMake.remove.requests.length !== 0) {
makeRequest('remove', requestsToMake.remove.requests, function (err) {
if (err) logger.error('Errors when sent remove pool requests.', { error: err })
Requests.removeRequests(requestsToMake.remove.ids)
})
}
})
})
}
function removeBadPods () {
Pods.findBadPods(function (err, pods) {
if (err) {
logger.error('Cannot find bad pods.', { error: err })
return // abort
}
if (pods.length === 0) return
const urls = map(pods, 'url')
const ids = map(pods, '_id')
Videos.listFromUrls(urls, function (err, videosList) {
if (err) {
logger.error('Cannot list videos urls.', { error: err, urls: urls })
} else {
videos.removeRemoteVideos(videosList, function (err) {
if (err) logger.error('Cannot remove remote videos.', { error: err })
})
}
Pods.removeAllByIds(ids, function (err, r) {
if (err) {
logger.error('Cannot remove bad pods.', { error: err })
} else {
const podsRemoved = r.result.n
logger.info('Removed %d pods.', podsRemoved)
}
})
})
})
}
function updatePodsScore (goodPods, badPods) {
logger.info('Updating %d good pods and %d bad pods scores.', goodPods.length, badPods.length)
Pods.incrementScores(goodPods, constants.PODS_SCORE.BONUS, function (err) {
if (err) logger.error('Cannot increment scores of good pods.')
})
Pods.incrementScores(badPods, constants.PODS_SCORE.MALUS, function (err) {
if (err) logger.error('Cannot increment scores of bad pods.')
removeBadPods()
})
}
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