Make page title dynamic, better notification handling.

src/components/notifications/notifications.js

@@ -1,4 +1,4 @@
-import { sortBy, take } from 'lodash'
+import { sortBy, take, filter } from 'lodash'
 
 const Notifications = {
   data () {
@@ -7,8 +7,30 @@ const Notifications = {
     }
   },
   computed: {
+    notifications () {
+      return this.$store.state.statuses.notifications
+    },
+    unseenNotifications () {
+      return filter(this.notifications, ({seen}) => !seen)
+    },
     visibleNotifications () {
-      return take(sortBy(this.$store.state.statuses.notifications, ({action}) => -action.id), this.visibleNotificationCount)
+      // Don't know why, but sortBy([seen, -action.id]) doesn't work.
+      let sortedNotifications = sortBy(this.notifications, ({action}) => -action.id)
+      sortedNotifications = sortBy(sortedNotifications, 'seen')
+      return take(sortedNotifications, this.visibleNotificationCount)
+    },
+    unseenCount () {
+      return this.unseenNotifications.length
+    }
+  },
+  watch: {
+    unseenCount (count) {
+      this.$store.dispatch('setPageTitle', `(${count})`)
+    }
+  },
+  methods: {
+    markAsSeen () {
+      this.$store.commit('markNotificationsAsSeen', this.visibleNotifications)
     }
   }
 }