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const EventEmitter = require('events').EventEmitter
const hardCodedNotices = require('../../development/notices.json')
module.exports = class NoticeController extends EventEmitter {
constructor (opts) {
super()
this.configManager = opts.configManager
this.noticePoller = null
}
getState() {
var lastUnreadNotice = this.getLatestUnreadNotice()
return {
lastUnreadNotice: lastUnreadNotice,
noActiveNotices: !lastUnreadNotice,
}
}
getNoticesList() {
var data = this.configManager.getData()
if ('noticesList' in data) {
return data.noticesList
} else {
return []
}
}
setNoticesList(list) {
var data = this.configManager.getData()
data.noticesList = list
this.configManager.setData(data)
return Promise.resolve(true)
}
markNoticeRead(notice, cb) {
cb = cb || function(err){ if (err) throw err }
try {
var notices = this.getNoticesList()
var id = notice.id
notices[id].read = true
this.setNoticesList(notices)
let latestNotice = this.getLatestUnreadNotice()
cb(null, latestNotice)
} catch (err) {
cb(err)
}
}
updateNoticesList() {
return this._retrieveNoticeData().then((newNotices) => {
var oldNotices = this.getNoticesList()
var combinedNotices = this._mergeNotices(oldNotices, newNotices)
return Promise.resolve(this.setNoticesList(combinedNotices))
})
}
getLatestUnreadNotice() {
var notices = this.getNoticesList()
var filteredNotices = notices.filter((notice) => {
return notice.read === false
})
return filteredNotices[filteredNotices.length - 1]
}
startPolling () {
if (this.noticePoller) {
clearInterval(this.noticePoller)
}
this.noticePoller = setInterval(() => {
this.noticeController.updateNoticesList()
}, 300000)
}
_mergeNotices(oldNotices, newNotices) {
var noticeMap = this._mapNoticeIds(oldNotices)
newNotices.forEach((notice) => {
if (noticeMap.indexOf(notice.id) === -1) {
oldNotices.push(notice)
}
})
return oldNotices
}
_mapNoticeIds(notices) {
return notices.map((notice) => notice.id)
}
_retrieveNoticeData() {
// Placeholder for the API.
return Promise.resolve(hardCodedNotices)
}
}
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