Include image_meta in wp_prepare_attachment_for_js response for images

[SteveHoneyNZ]

Currently seems odd that the image_meta array isn't returned in the response from wp_prepare_attachment_for_js for an image.

The function already calls get_attachment_metadata so the image_meta array is readily available.
The meta key is already declared in the response array.
All other mime types populate the meta value in the response array in a similar fashion as my proposal.

I can't see any downside or overhead, and the function becomes much more powerful, particulaly for gallery implenmenations, as a result.

The addition is just three lines (in wp-includes/media.php #L2835 of current version).

Should note the addition is at line 145 of the attached (uploaded only the wp_prepare_attachment_for_js function rather than entire media.php file).

As I also mentioned on #33772, a real patch showing your changes would be nice.

Also, a unit test exists for the wp_prepare_attachment_for_js function which would need to be extended to reflect this change. You can read this section about ​automated testing to see what that means. Don't worry if it doesn't work or something, I'm sure someone else could help out too.

Ok, added :) First Ticket, first patch, first time using SVN so apologies if anything's incorrect.

Not overly familiar with unit tests either but . I'm sure I'll get there too with a bit of investigating. Thanks for the pointers

The other types need the metadata to render in the admin/media modal properly. Images do not. $meta is available as a param to the 'wp_prepare_attachment_for_js' filter. I would suggest adding it to the response there.