add resolver for save active categories

backend/src/schema/resolvers/users.js

@@ -269,6 +269,46 @@ export default {
         session.close()
       }
     },
+    saveCategorySettings: async (object, args, context, resolveInfo) => {
+      const { activeCategories } = args
+      const {
+        user: { id },
+      } = context
+
+      const session = context.driver.session()
+      await session.writeTransaction((transaction) => {
+        return transaction.run(
+          `
+          MATCH (user:User { id: $id })-[previousCategories:NOT_INTERESTED_IN]->(category:Category)
+          DELETE previousCategories
+          RETURN user, category
+        `,
+          { id },
+        )
+      })
+
+      const writeTxResultPromise = session.writeTransaction(async (transaction) => {
+        const saveCategorySettingsResponse = await transaction.run(
+          `
+            MATCH (category:Category) WHERE NOT category.id IN $activeCategories
+            MATCH (user:User { id: $id })
+            MERGE (user)-[r:NOT_INTERESTED_IN]->(category)
+            RETURN user, r, category
+          `,
+          { id, activeCategories },
+        )
+        const [user] = await saveCategorySettingsResponse.records.map((record) =>
+          record.get('user'),
+        )
+        return user
+      })
+      try {
+        await writeTxResultPromise
+        return true
+      } finally {
+        session.close()
+      }
+    },
   },
   User: {
     email: async (parent, params, context, resolveInfo) => {