GH-2 Adding support for enum argument types in queries.

Author: douglaseggleton

README.md

@@ -56,14 +56,15 @@ query {
 ### Query with arguments
 
 ```typescript
-import { jsonToGraphQLQuery } from 'json-to-graphql-query';
+import { jsonToGraphQLQuery, EnumType } from 'json-to-graphql-query';
 
 const query = {
     query: {
         Posts: {
             __args: {
                 where: { id: 2 }
-                orderBy: 'post_date'
+                orderBy: 'post_date',
+                status: new EnumType('PUBLISHED')
             },
             id: true,
             title: true,
@@ -78,7 +79,7 @@ Resulting `graphql_query`
 
 ```graphql
 query {
-    Posts (where: {id: 2}, orderBy: "post_date") {
+    Posts (where: {id: 2}, orderBy: "post_date", status: PUBLISHED) {
         id
         title
         post_date
@@ -132,4 +133,4 @@ Pull requests welcome!
 
 ## License
 
-MIT
+MIT

package.json

@@ -1,6 +1,6 @@
 {
   "name": "json-to-graphql-query",
-  "version": "1.1.2",
+  "version": "1.1.3",
   "main": "lib/index.js",
   "license": "MIT",
   "scripts": {

src/__tests__/jsonToGraphQLQuery.tests.ts

@@ -1,6 +1,6 @@
 
 import { expect } from 'chai';
-import { jsonToGraphQLQuery } from '../';
+import { jsonToGraphQLQuery, EnumType } from '../';
 
 describe('jsonToGraphQL()', () => {
 
@@ -66,6 +66,29 @@ describe('jsonToGraphQL()', () => {
 }`);
     });
 
+    it('converts a query with enum arguments', () => {
+      const query = {
+          query: {
+              Posts: {
+                  __args: {
+                      status: new EnumType('PUBLISHED')
+                  },
+                  id: true,
+                  title: true,
+                  post_date: true
+              }
+          }
+      };
+      expect(jsonToGraphQLQuery(query, { pretty: true })).to.equal(
+`query {
+    Posts (status: PUBLISHED) {
+        id
+        title
+        post_date
+    }
+}`);
+  });
+
     it('converts a query with JSON arguments', () => {
         const query = {
             query: {
@@ -243,4 +266,4 @@ describe('jsonToGraphQL()', () => {
             'query { Posts (arg1: 20, arg2: "flibble") { id title } }'
         );
     });
-});
+});

src/jsonToGraphQLQuery.ts

@@ -1,7 +1,9 @@
-
 function stringify(obj_from_json: any): string {
+    if (obj_from_json instanceof EnumType) {
+        return obj_from_json.value;
+    }
     // Cheers to Derek: https://stackoverflow.com/questions/11233498/json-stringify-without-quotes-on-properties
-    if (typeof obj_from_json !== 'object' || obj_from_json === null) {
+    else if (typeof obj_from_json !== 'object' || obj_from_json === null) {
         // not an object, stringify using native function
         return JSON.stringify(obj_from_json);
     }
@@ -84,4 +86,8 @@ export function jsonToGraphQLQuery(query: any, options: IJsonToGraphQLOptions =
         }
     });
     return output;
-}
+}
+
+export class EnumType {
+  constructor(public value: string) {}
+}