Update notifications

- create only one relationship by using merge, but do not update
createdAt attribute/update test
- order by updatedAt_desc

backend/src/middleware/notifications/notificationsMiddleware.js

@@ -24,9 +24,13 @@ const notifyUsers = async (label, id, idsOfUsers, reason, context) => {
         MATCH (user: User)
         WHERE user.id in $idsOfUsers
         AND NOT (user)<-[:BLOCKED]-(author)
-        CREATE (post)-[notification:NOTIFIED {reason: $reason}]->(user)
+        MERGE (post)-[notification:NOTIFIED {reason: $reason}]->(user)
         SET notification.read = FALSE
-        SET notification.createdAt = toString(datetime())
+        SET (
+        CASE
+        WHEN notification.createdAt IS NULL
+        THEN notification END ).createdAt = toString(datetime())
+        SET notification.updatedAt = toString(datetime())
       `
       break
     }
@@ -37,9 +41,13 @@ const notifyUsers = async (label, id, idsOfUsers, reason, context) => {
         WHERE user.id in $idsOfUsers
         AND NOT (user)<-[:BLOCKED]-(author)
         AND NOT (user)<-[:BLOCKED]-(postAuthor)
-        CREATE (comment)-[notification:NOTIFIED {reason: $reason}]->(user)
+        MERGE (comment)-[notification:NOTIFIED {reason: $reason}]->(user)
         SET notification.read = FALSE
-        SET notification.createdAt = toString(datetime())
+        SET (
+        CASE
+        WHEN notification.createdAt IS NULL
+        THEN notification END ).createdAt = toString(datetime())
+        SET notification.updatedAt = toString(datetime())
       `
       break
     }
@@ -50,9 +58,13 @@ const notifyUsers = async (label, id, idsOfUsers, reason, context) => {
         WHERE user.id in $idsOfUsers
         AND NOT (user)<-[:BLOCKED]-(author)
         AND NOT (author)<-[:BLOCKED]-(user)
-        CREATE (comment)-[notification:NOTIFIED {reason: $reason}]->(user)
+        MERGE (comment)-[notification:NOTIFIED {reason: $reason}]->(user)
         SET notification.read = FALSE
-        SET notification.createdAt = toString(datetime())
+        SET (
+        CASE
+        WHEN notification.createdAt IS NULL
+        THEN notification END ).createdAt = toString(datetime())
+        SET notification.updatedAt = toString(datetime())
       `
       break
     }

backend/src/middleware/notifications/notificationsMiddleware.spec.js

@@ -77,7 +77,7 @@ afterEach(async () => {
 describe('notifications', () => {
   const notificationQuery = gql`
     query($read: Boolean) {
-      notifications(read: $read, orderBy: createdAt_desc) {
+      notifications(read: $read, orderBy: updatedAt_desc) {
         read
         reason
         createdAt

backend/src/schema/resolvers/notifications.js

@@ -32,11 +32,11 @@ export default {
           whereClause = ''
       }
       switch (args.orderBy) {
-        case 'createdAt_asc':
-          orderByClause = 'ORDER BY notification.createdAt ASC'
+        case 'updatedAt_asc':
+          orderByClause = 'ORDER BY notification.updatedAt ASC'
           break
-        case 'createdAt_desc':
-          orderByClause = 'ORDER BY notification.createdAt DESC'
+        case 'updatedAt_desc':
+          orderByClause = 'ORDER BY notification.updatedAt DESC'
           break
         default:
           orderByClause = ''

backend/src/schema/types/type/NOTIFIED.gql

@@ -2,6 +2,7 @@ type NOTIFIED {
   from: NotificationSource
   to: User
   createdAt: String
+  updatedAt: String
   read: Boolean
   reason: NotificationReason
 }
@@ -11,6 +12,8 @@ union NotificationSource = Post | Comment
 enum NotificationOrdering {
   createdAt_asc
   createdAt_desc
+  updatedAt_asc
+  updatedAt_desc
 }
 
 enum NotificationReason {

webapp/components/notifications/NotificationMenu/NotificationMenu.vue

@@ -1,13 +1,12 @@
 <template>
-  <ds-button
-    v-if="totalNotifications <= 0"
-    class="notifications-menu"
-    disabled
-    icon="bell"
-  >{{ totalNotifications }}</ds-button>
+  <ds-button v-if="totalNotifications <= 0" class="notifications-menu" disabled icon="bell">
+    {{ totalNotifications }}
+  </ds-button>
   <dropdown v-else class="notifications-menu" :placement="placement">
     <template slot="default" slot-scope="{ toggleMenu }">
-      <ds-button primary icon="bell" @click.prevent="toggleMenu">{{ totalNotifications }}</ds-button>
+      <ds-button primary icon="bell" @click.prevent="toggleMenu">
+        {{ totalNotifications }}
+      </ds-button>
     </template>
     <template slot="popover">
       <div class="notifications-menu-popover">

webapp/graphql/User.js

@@ -97,7 +97,7 @@ export const notificationQuery = i18n => {
     ${postFragment(lang)}
 
     query {
-      notifications(read: false, orderBy: createdAt_desc) {
+      notifications(read: false, orderBy: updatedAt_desc) {
         read
         reason
         createdAt