Image Alt value: ActivityPub representation only picks value from attachment data

[jeherve]

Quick summary

WordPress currently offers 2 ways to set an image's alt value: you can set that value in the attachment details, or you can set it within the image block settings.

When using the image block settings, the alt value is not visible in the ActivityPub representation.

Steps to reproduce

1. Go to Posts > Add New
2. Insert an image block
3. Upload an image.
4. in the block settings sidebar, define an alt text.
5. Publish.

What you expected to happen

I expected the alt text to appear in the post's representation on the Fediverse.

What actually happened

Instead, I only see the alt text on the Fediverse if the image has an alt text set in Media > Library > Attachment details.

Impact

All

Available workarounds?

Yes, easy to implement

Logs or notes

No response

[github-actions]

This issue could use some more labels, to help prioritize and categorize our work. Could you please add at least a [Type], a [Feature], and a [Pri] label?

[pfefferle]

This is implemented and should work:

wordpress-activitypub/includes/transformer/class-post.php

Line 451 in 56fc7fa

$check = preg_match( '/<img.*?alt\s*=\s*([\"\'])(.*?)\1.*>/i', $block['innerHTML'], $match );

Can you try to find out why this does not work for you? Do you use plugins that extend the image code so that the regex does not work properly?