feat(form): support dataStructure element in serialize

Allow passing the dataStructure element directly, instead of its content

Author: kylef

packages/form-serializer/lib/serializeForm.js

@@ -28,6 +28,10 @@ function collectElementByIDs(element) {
 }
 
 function serializeForm({ api, mediaType }) {
+  if (api.element === 'dataStructure') {
+    return serializeForm({ api: api.content, mediaType });
+  }
+
   const dataStructures = collectElementByIDs(api);
   let values = api.valueOf(undefined, dataStructures);
 
@@ -51,9 +55,11 @@ function serializeForm({ api, mediaType }) {
     content += `--${boundary}--\r\n`;
     return content;
   }
+
   if (typeof values === 'string') {
     values = { undefined: values };
   }
+
   return querystring.encode(values);
 }
 

packages/form-serializer/test/serializeForm-test.js

@@ -18,6 +18,14 @@ describe('#serializeForm', () => {
     expect(serializeForm({ api: element, mediaType: 'multipart/form-data' })).to.equal('--BOUNDARY\r\nContent-Disposition: form-data; name="undefined"\r\n\r\nHello world\r\n--BOUNDARY--\r\n');
   });
 
+  it('can serialize a dataStructure element', () => {
+    const element = new namespace.elements.DataStructure(
+      new namespace.elements.String('Hello world')
+  );
+
+    expect(serializeForm({ api: element, mediaType: 'multipart/form-data' })).to.equal('--BOUNDARY\r\nContent-Disposition: form-data; name="undefined"\r\n\r\nHello world\r\n--BOUNDARY--\r\n');
+  });
+
   it('can serialize an element with references via parent tree', () => {
     const element = new namespace.elements.Element();
     element.element = 'message';