Add relationship for pinned posts and user

- The CreateUser mutation now returns the user who pinned a post and so we can see the user who pinned the post

backend/src/schema/resolvers/posts.js

@@ -75,20 +75,29 @@ export default {
   },
   Mutation: {
     CreatePost: async (_parent, params, context, _resolveInfo) => {
-      const { categoryIds } = params
+      const { categoryIds, pinned } = params
+      delete params.pinned
       delete params.categoryIds
       params = await fileUpload(params, { file: 'imageUpload', url: 'image' })
       params.id = params.id || uuid()
       let post
 
-      const createPostCypher = `CREATE (post:Post {params})
+      let createPostCypher = `CREATE (post:Post {params})
         SET post.createdAt = toString(datetime())
         SET post.updatedAt = toString(datetime())
         WITH post
         MATCH (author:User {id: $userId})
         MERGE (post)<-[:WROTE]-(author)
-        WITH post
+        WITH post, author`
-        UNWIND $categoryIds AS categoryId
+
+      if (pinned) {
+        createPostCypher += `
+          MERGE (post)<-[:PINNED]-(author)
+          WITH post
+          `
+      }
+
+      createPostCypher += `UNWIND $categoryIds AS categoryId
         MATCH (category:Category {id: categoryId})
         MERGE (post)-[:CATEGORIZED]->(category)
         RETURN post`
@@ -98,7 +107,9 @@ export default {
       const session = context.driver.session()
       try {
         const transactionRes = await session.run(createPostCypher, createPostVariables)
-        const posts = transactionRes.records.map(record => record.get('post').properties)
+        const posts = transactionRes.records.map(record => {
+          return record.get('post').properties
+        })
         post = posts[0]
       } catch (e) {
         if (e.code === 'Neo.ClientError.Schema.ConstraintValidationFailed')
@@ -225,6 +236,7 @@ export default {
       hasOne: {
         author: '<-[:WROTE]-(related:User)',
         disabledBy: '<-[:DISABLED]-(related:User)',
+        pinnedBy: '<-[:PINNED]-(related:User)',
       },
       count: {
         commentsCount:

backend/src/schema/resolvers/posts.spec.js

@@ -39,7 +39,11 @@ const createPostMutation = gql`
       slug
       disabled
       deleted
-      pinned
+      pinnedBy {
+        id
+        name
+        role
+      }
       language
       author {
         name
@@ -422,9 +426,14 @@ describe('CreatePost', () => {
                 author: {
                   name: 'Admin',
                 },
-                pinned: true,
+                pinnedBy: {
+                  id: 'current-user',
+                  name: 'Admin',
+                  role: 'admin',
+                },
               },
             },
+            errors: undefined,
           }
 
           await expect(mutate({ mutation: createPostMutation, variables })).resolves.toMatchObject(

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

@@ -16,7 +16,7 @@ type Post {
   createdAt: String
   updatedAt: String
   language: String
-  pinned: Boolean
+  pinnedBy: User @relation(name:"PINNED", direction: "IN")
   relatedContributions: [Post]!
     @cypher(
       statement: """
@@ -41,7 +41,7 @@ type Post {
     @cypher(
       statement: "MATCH (this)<-[:SHOUTED]-(r:User) WHERE NOT r.deleted = true AND NOT r.disabled = true RETURN COUNT(DISTINCT r)"
     )
-
+  
   # Has the currently logged in user shouted that post?
   shoutedByCurrentUser: Boolean!
     @cypher(