96 lines
2.5 KiB
JavaScript
96 lines
2.5 KiB
JavaScript
const EventEmitter = require('events').EventEmitter
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const extend = require('xtend')
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const ObservableStore = require('obs-store')
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const hardCodedNotices = require('../../notices/notices.json')
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module.exports = class NoticeController extends EventEmitter {
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constructor (opts) {
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super()
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this.noticePoller = null
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const initState = extend({
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noticesList: [],
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}, opts.initState)
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this.store = new ObservableStore(initState)
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this.memStore = new ObservableStore({})
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this.store.subscribe(() => this._updateMemstore())
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}
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getNoticesList () {
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return this.store.getState().noticesList
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}
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getUnreadNotices () {
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const notices = this.getNoticesList()
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return notices.filter((notice) => notice.read === false)
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}
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getLatestUnreadNotice () {
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const unreadNotices = this.getUnreadNotices()
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return unreadNotices[unreadNotices.length - 1]
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}
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setNoticesList (noticesList) {
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this.store.updateState({ noticesList })
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return Promise.resolve(true)
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}
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markNoticeRead (noticeToMark, cb) {
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cb = cb || function (err) { if (err) throw err }
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try {
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var notices = this.getNoticesList()
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var index = notices.findIndex((currentNotice) => currentNotice.id === noticeToMark.id)
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notices[index].read = true
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notices[index].body = ''
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this.setNoticesList(notices)
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const latestNotice = this.getLatestUnreadNotice()
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cb(null, latestNotice)
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} catch (err) {
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cb(err)
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}
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}
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updateNoticesList () {
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return this._retrieveNoticeData().then((newNotices) => {
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var oldNotices = this.getNoticesList()
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var combinedNotices = this._mergeNotices(oldNotices, newNotices)
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return Promise.resolve(this.setNoticesList(combinedNotices))
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})
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}
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startPolling () {
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if (this.noticePoller) {
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clearInterval(this.noticePoller)
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}
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this.noticePoller = setInterval(() => {
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this.noticeController.updateNoticesList()
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}, 300000)
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}
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_mergeNotices (oldNotices, newNotices) {
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var noticeMap = this._mapNoticeIds(oldNotices)
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newNotices.forEach((notice) => {
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if (noticeMap.indexOf(notice.id) === -1) {
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oldNotices.push(notice)
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}
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})
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return oldNotices
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}
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_mapNoticeIds (notices) {
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return notices.map((notice) => notice.id)
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}
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_retrieveNoticeData () {
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// Placeholder for the API.
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return Promise.resolve(hardCodedNotices)
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}
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_updateMemstore () {
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const lastUnreadNotice = this.getLatestUnreadNotice()
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const noActiveNotices = !lastUnreadNotice
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this.memStore.updateState({ lastUnreadNotice, noActiveNotices })
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}
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}
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