Global styles controllers: extend with WP_REST_Posts_Controller and WP_REST_Revisions_Controller

[ramonjd]

This change:

• extends WP_REST_Global_Styles_Revisions_Controller with WP_REST_Revisions_Controller
• extends WP_REST_Global_Styles_Controller with WP_REST_Posts_Controller

As part of this work, the PR also:

• Removes shared public methods
• Updates schema to use parent and parent controller's properties. Unsets unnecessary properties.
• Updates relevant tests. Deletes dupes.

Testing

Head over to the site editor, make a few changes to global styles.

2024-05-18.09.57.01.mp4

1. Ensure that the revisions appear in the global styles revisions panel.
2. Check that you can apply them to the editor canvas

You can test the responses in the editor as well by using the API in the browser console.

// Get all post types and check that `wp_global_styles` post type does not support `autosave`
const postTypes = await wp.data.resolveSelect( 'core' ).getPostTypes();
postTypes.find( item => item.slug === 'wp_global_styles' ).supports // {title: true, editor: true, revisions: true}

// Get user global styles
await wp.data.resolveSelect( 'core' ).getEntityRecord( 'root', 'globalStyles', await wp.data.resolveSelect( 'core' ).__experimentalGetCurrentGlobalStylesId() )

// Get global styles items (variations)
await wp.data.resolveSelect( 'core' ).__experimentalGetCurrentThemeGlobalStylesVariations()

// Get all revisions.
await wp.data.resolveSelect( 'core' ).getRevisions( 'root', 'globalStyles', await wp.data.resolveSelect( 'core' ).__experimentalGetCurrentGlobalStylesId() ) 

// Get a single revision, where <REVISION_ID> is the id of the single revision.
await wp.data.resolveSelect( 'core' ).getRevision( 'root', 'globalStyles', await wp.data.resolveSelect( 'core' ).__experimentalGetCurrentGlobalStylesId(), <REVISION_ID> ) 

Trac ticket: https://core.trac.wordpress.org/ticket/60131

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[github-actions]

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[ramonjd]

Closing in favour of #6105

[swissspidy]

Committed in https://core.trac.wordpress.org/changeset/58225