Add sanitization for missing label to mapper

[MAILPOET-2592]

assets/js/src/form_editor/store/form_body_to_blocks.jsx

@@ -78,8 +78,8 @@ export default (data, customFields = []) => {
     if (item.params && has(item.params, 'label_within')) {
       mapped.attributes.labelWithinInput = !!item.params.label_within;
     }
-    if (item.params && has(item.params, 'label')) {
+    if (item.params) {
-      mapped.attributes.label = item.params.label;
+      mapped.attributes.label = item.params.label ? item.params.label : null;
     }
     switch (item.id) {
       case 'email':
@@ -121,11 +121,13 @@ export default (data, customFields = []) => {
           name: 'mailpoet-form/submit-button',
         };
       case 'divider':
+        delete mapped.attributes.label;
         return {
           ...mapped,
           name: 'mailpoet-form/divider',
         };
       case 'html':
+        delete mapped.attributes.label;
         return {
           ...mapped,
           name: 'mailpoet-form/html',

tests/javascript/form_editor/store/form_body_to_blocks.spec.js

@@ -219,6 +219,14 @@ describe('Form Body To Blocks', () => {
     expect(block.attributes.labelWithinInput).to.be.equal(true);
   });
 
+  it('Should add a label if label is missing in data', () => {
+    const input = { ...emailInput, position: '1' };
+    delete input.params.label;
+    const [block] = formBodyToBlocks([{ ...emailInput, position: '1' }]);
+    checkBlockBasics(block);
+    expect(block.attributes.label).to.be.equal(null);
+  });
+
   it('Should map first name input to block', () => {
     const [block] = formBodyToBlocks([{ ...firstNameInput, position: '1' }]);
     checkBlockBasics(block);