feat: add mutation for new functionality (mark-all-as-read)

- Add mutation for markAllAsRead (notifications)
- Add method to the schema that returns a list of all notifications
- Add permissions rules to invoke this method (isAuthenticated)

See #2660

backend/src/middleware/permissionsMiddleware.js

@@ -143,6 +143,7 @@ export default shield(
       blockUser: isAuthenticated,
       unblockUser: isAuthenticated,
       markAsRead: isAuthenticated,
+      markAllAsRead: isAuthenticated,
       AddEmailAddress: isAuthenticated,
       VerifyEmailAddress: isAuthenticated,
       pinPost: isAdmin,

backend/src/schema/resolvers/notifications.js

@@ -99,6 +99,35 @@ export default {
         session.close()
       }
     },
+    markAllAsRead: async (parent, args, context, resolveInfo) => {
+      const { user: currentUser } = context
+      const session = context.driver.session()
+      const writeTxResultPromise = session.writeTransaction(async (transaction) => {
+        const markAllNotificationAsReadTransactionResponse = await transaction.run(
+          ` 
+            MATCH (resource {deleted: false, disabled: false})-[notification:NOTIFIED {read: FALSE}]->(user:User {id:$id})
+            SET notification.read = TRUE
+            WITH user, notification, resource,
+            [(resource)<-[:WROTE]-(author:User) | author {.*}] AS authors,
+            [(resource)-[:COMMENTS]->(post:Post)<-[:WROTE]-(author:User) | post{.*, author: properties(author)} ] AS posts
+            WITH resource, user, notification, authors, posts,
+            resource {.*, __typename: labels(resource)[0], author: authors[0], post: posts[0]} AS finalResource
+            RETURN notification {.*, from: finalResource, to: properties(user)}
+          `,
+          { id: currentUser.id },
+        )
+        log(markAllNotificationAsReadTransactionResponse)
+        return markAllNotificationAsReadTransactionResponse.records.map((record) =>
+          record.get('notification'),
+        )
+      })
+      try {
+        const notifications = await writeTxResultPromise
+        return notifications
+      } finally {
+        session.close()
+      }
+    },
   },
   NOTIFIED: {
     id: async (parent) => {

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

@@ -29,6 +29,7 @@ type Query {
   
 type Mutation {
   markAsRead(id: ID!): NOTIFIED
+  markAllAsRead: [NOTIFIED]
 }
 
 type Subscription {

webapp/graphql/User.js

@@ -136,6 +136,42 @@ export const markAsReadMutation = (i18n) => {
   `
 }
 
+export const markAllAsReadMutation = (i18n) => {
+  return gql`
+    ${userFragment}
+    ${commentFragment}
+    ${postFragment}
+
+    mutation {
+      markAllAsRead {
+        id
+        read
+        reason
+        createdAt
+        updatedAt
+        from {
+          __typename
+          ... on Post {
+            ...post
+            author {
+              ...user
+            }
+          }
+          ... on Comment {
+            ...comment
+            post {
+              ...post
+              author {
+                ...user
+              }
+            }
+          }
+        }
+      }
+    }
+  `
+}
+
 export const notificationAdded = () => {
   return gql`
     ${userFragment}