Coerce undefinedToNull in embed resolver

backend/src/schema/helpers.js

@@ -0,0 +1,9 @@
+export const undefinedToNull = list => {
+  const resolvers = {}
+  list.forEach(key => {
+    resolvers[key] = async (parent, params, context, resolveInfo) => {
+      return typeof parent[key] === 'undefined' ? null : parent[key]
+    }
+  })
+  return resolvers
+}

backend/src/schema/resolvers/embeds.js

@@ -1,4 +1,5 @@
 import scrape from './embeds/scraper.js'
+import { undefinedToNull } from '../helpers'
 
 export default {
   Query: {
@@ -6,4 +7,23 @@ export default {
       return scrape(url)
     },
   },
+  Embed: {
+    ...undefinedToNull([
+      'type',
+      'title',
+      'author',
+      'publisher',
+      'date',
+      'description',
+      'url',
+      'image',
+      'audio',
+      'video',
+      'lang',
+      'html',
+    ]),
+    sources: async (parent, params, context, resolveInfo) => {
+      return typeof parent.sources === 'undefined' ? [] : parent.sources
+    },
+  },
 }

backend/src/schema/resolvers/embeds/scraper.js

@@ -95,23 +95,8 @@ export default async function scrape(url) {
     throw new ApolloError('Not found', 'NOT_FOUND')
   }
 
-  const defaults = {
-    type: 'link',
-    title: null,
-    author: null,
-    publisher: null,
-    date: null,
-    description: null,
-    url: null,
-    image: null,
-    audio: null,
-    video: null,
-    lang: null,
-    html: null,
-  }
-
   return {
-    ...defaults,
+    type: 'link',
     ...output,
   }
 }

backend/src/schema/resolvers/users.js

@@ -2,6 +2,7 @@ import { neo4jgraphql } from 'neo4j-graphql-js'
 import fileUpload from './fileUpload'
 import { neode } from '../../bootstrap/neo4j'
 import { UserInputError } from 'apollo-server'
+import { undefinedToNull } from '../helpers'
 
 const instance = neode()
 
@@ -36,16 +37,6 @@ const count = obj => {
   return resolvers
 }
 
-const undefinedToNull = list => {
-  const resolvers = {}
-  list.forEach(key => {
-    resolvers[key] = async (parent, params, context, resolveInfo) => {
-      return typeof parent[key] === 'undefined' ? null : parent[key]
-    }
-  })
-  return resolvers
-}
-
 export const hasMany = obj => {
   const resolvers = {}
   for (const [key, connection] of Object.entries(obj)) {