mirror of
https://github.com/kremalicious/metamask-extension.git
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97 lines
2.3 KiB
JavaScript
97 lines
2.3 KiB
JavaScript
const EventEmitter = require('events').EventEmitter
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const hardCodedNotices = require('../../development/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.configManager = opts.configManager
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this.noticePoller = null
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}
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getState() {
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var lastUnreadNotice = this.getLatestUnreadNotice()
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return {
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lastUnreadNotice: lastUnreadNotice,
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noActiveNotices: !lastUnreadNotice,
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}
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}
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getNoticesList() {
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var data = this.configManager.getData()
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if ('noticesList' in data) {
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return data.noticesList
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} else {
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return []
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}
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}
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setNoticesList(list) {
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var data = this.configManager.getData()
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data.noticesList = list
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this.configManager.setData(data)
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return Promise.resolve(true)
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}
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markNoticeRead(notice, 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 id = notice.id
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notices[id].read = true
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this.setNoticesList(notices)
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let 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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getLatestUnreadNotice() {
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var notices = this.getNoticesList()
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var filteredNotices = notices.filter((notice) => {
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return notice.read === false
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})
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return filteredNotices[filteredNotices.length - 1]
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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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}
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