1 files changed, 96 insertions, 0 deletions
diff --git a/app/scripts/notice-controller.js b/app/scripts/notice-controller.js
new file mode 100644
index 000000000..438f5c27e
--- /dev/null
+++ b/app/scripts/notice-controller.js
@@ -0,0 +1,96 @@
+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)
+  }
+
+
+}