It is possible to add a Media block without a media URL specified; this situation will generate a PHP notice

Notice:  Undefined index: youtube_id in /app/source/public/wp-content/plugins/planet4-plugin-gutenberg-blocks/classes/blocks/class-media.php on line 92

and display a string false on frontend.

This error is locally available on url planet4.test/testing-all-blocks-default-template/

Tasks:

• For existing content
  • Fix Notice (check youtube_id entry, return early when no url is found)
  • Fix frontend block (MediaEmbedPreview should not be used if media_url is empty)
• For new content
  • Check if the Media URL field should be mandatory for this block
  • Add a check on the Post Publish validation