Example code of lecture #10

backend/src/middleware/demoMiddleware.js

@@ -0,0 +1,21 @@
+export default {
+  Query: {
+    listCategories: async (resolve, parent, args, context, resolveInfo) => {
+      console.log('Query.listCategories')
+      const categories = await resolve(parent, args, context, resolveInfo)
+      console.log('resolved categories:', categories)
+      return categories
+    },
+  },
+  Category: {
+    slug: async (resolve, parent, args, context, resolveInfo) => {
+      console.log('Category.slug')
+      console.log('parent:', parent)
+      const { user } = context
+      if (!user) return 'censored'
+      const slug = await resolve(parent, args, context, resolveInfo)
+      console.log('resolved slug:', slug)
+      return slug
+    },
+  },
+}

backend/src/middleware/index.js

@@ -15,6 +15,7 @@ import notifications from './notifications/notificationsMiddleware'
 import hashtags from './hashtags/hashtagsMiddleware'
 import email from './email/emailMiddleware'
 import sentry from './sentryMiddleware'
+import demoMiddleware from './demoMiddleware'
 
 export default schema => {
   const middlewares = {
@@ -32,6 +33,7 @@ export default schema => {
     includedFields,
     orderBy,
     email,
+    demoMiddleware,
   }
 
   let order = [
@@ -49,6 +51,7 @@ export default schema => {
     'user',
     'includedFields',
     'orderBy',
+    'demoMiddleware',
   ]
 
   // add permisions middleware at the first position (unless we're seeding)

backend/src/middleware/permissionsMiddleware.js

@@ -84,6 +84,7 @@ export default shield(
   {
     Query: {
       '*': deny,
+      listCategories: allow,
       findPosts: allow,
       embed: allow,
       Category: allow,

backend/src/schema/resolvers/demo.js

@@ -0,0 +1,34 @@
+export default {
+  Query: {
+    listCategories: () => [
+      {
+        name: 'Global Peace & Nonviolence',
+        slug: 'global-peace-nonviolence',
+      },
+      {
+        name: 'Human Rights & Justice',
+        slug: 'human-rights-justice',
+      },
+      {
+        name: 'Happiness & Values',
+        slug: 'happiness-values',
+      },
+      {
+        name: 'Economy & Finances',
+        slug: 'economy-finances',
+      },
+      {
+        name: 'Freedom of Speech',
+        slug: 'freedom-of-speech',
+      },
+      {
+        name: 'Consumption & Sustainability',
+        slug: 'consumption-sustainability',
+      },
+      {
+        name: 'Animal Protection',
+        slug: 'animal-protection',
+      }
+    ],
+  },
+}

backend/src/schema/types/schema.gql

@@ -1,4 +1,5 @@
 type Query {
+  listCategories: [Category]
   isLoggedIn: Boolean!
   # Get the currently logged in User based on the given JWT Token
   currentUser: User