Remove unnecessary use of mailpoet_data

MAILPOET-6431

packages/js/email-editor/src/hooks/use-preview-templates.ts

@@ -5,6 +5,7 @@ import { useMemo } from '@wordpress/element';
 import { parse } from '@wordpress/blocks';
 import { BlockInstance } from '@wordpress/blocks/index';
 import { useSelect } from '@wordpress/data';
+import { applyFilters } from '@wordpress/hooks';
 
 /**
  * Internal dependencies
@@ -163,6 +164,11 @@ export function usePreviewTemplates(
 
 	const allEmailPosts = useMemo( () => {
 		return emailPosts?.map( ( post: EmailEditorPostType ) => {
+			const preferredTitle = applyFilters(
+				'mailpoet_email_editor_preferred_template_title',
+				'',
+				post
+			);
 			const { postTemplateContent } = generateTemplateContent(
 				post,
 				allTemplates
@@ -180,9 +186,8 @@ export function usePreviewTemplates(
 			const template = {
 				...post,
 				title: {
-					raw: post?.mailpoet_data?.subject || post.title.raw,
-					rendered:
-						post?.mailpoet_data?.subject || post.title.rendered, // use MailPoet subject as title
+					raw: post.title.raw,
+					rendered: preferredTitle || post.title.rendered,
 				},
 			};
 			return {

packages/js/email-editor/src/store/selectors.ts

@@ -96,13 +96,8 @@ export const isEmpty = createRegistrySelector( ( select ) => (): boolean => {
 		return true;
 	}
 
-	const { content, mailpoet_data: mailpoetData, title } = post;
-	return (
-		! content.raw &&
-		! mailpoetData.subject &&
-		! mailpoetData.preheader &&
-		! title.raw
-	);
+	const { content, title } = post;
+	return ! content.raw && ! title.raw;
 } );
 
 export const hasEmptyContent = createRegistrySelector(

packages/js/email-editor/src/store/types.ts

@@ -261,7 +261,6 @@ export type MailPoetEmailPostContentExtended = {
 
 export type EmailEditorPostType = Omit< Post, 'type' > & {
 	type: string;
-	mailpoet_data?: MailPoetEmailPostContentExtended;
 };
 
 export type EmailContentValidationAction = {