add gesture to close notifications drawer

src/components/mobile_nav/mobile_nav.js

@@ -2,6 +2,7 @@ import SideDrawer from '../side_drawer/side_drawer.vue'
 import Notifications from '../notifications/notifications.vue'
 import MobilePostStatusModal from '../mobile_post_status_modal/mobile_post_status_modal.vue'
 import { unseenNotificationsFromStore } from '../../services/notification_utils/notification_utils'
+import GestureService from '../../services/gesture_service/gesture_service'
 
 const MobileNav = {
   components: {
@@ -10,8 +11,16 @@ const MobileNav = {
     MobilePostStatusModal
   },
   data: () => ({
+    notificationsCloseGesture: undefined,
     notificationsOpen: false
   }),
+  created () {
+    this.notificationsCloseGesture = GestureService.swipeGesture(
+      GestureService.DIRECTION_RIGHT,
+      this.closeMobileNotifications,
+      50
+    )
+  },
   computed: {
     currentUser () {
       return this.$store.state.users.currentUser
@@ -39,6 +48,12 @@ const MobileNav = {
         this.markNotificationsAsSeen()
       }
     },
+    notificationsTouchStart (e) {
+      GestureService.beginSwipe(e, this.notificationsCloseGesture)
+    },
+    notificationsTouchMove (e) {
+      GestureService.updateSwipe(e, this.notificationsCloseGesture)
+    },
     scrollToTop () {
       window.scrollTo(0, 0)
     },

src/components/mobile_nav/mobile_nav.vue

 <template>
-  <nav class='nav-bar container asd' id="nav">
+  <nav class='nav-bar container' id="nav">
     <div class='mobile-inner-nav' @click="scrollToTop()">
       <div class='item'>
         <a href="#" class="mobile-nav-button" @click.stop.prevent="toggleMobileSidebar()">
@@ -15,7 +15,12 @@
       </div>
     </div>
     <SideDrawer ref="sideDrawer" :logout="logout"/>
-    <div v-if="currentUser" class="mobile-notifications-drawer" :class="{ 'closed': !notificationsOpen }">
+    <div v-if="currentUser"
+      class="mobile-notifications-drawer"
+      :class="{ 'closed': !notificationsOpen }"
+      @touchstart="notificationsTouchStart"
+      @touchmove="notificationsTouchMove"
+    >
       <div class="mobile-notifications-header">
         <span class="title">{{$t('notifications.notifications')}}</span>
         <a class="mobile-nav-button" @click.stop.prevent="closeMobileNotifications()">