Mini-plugin to debug the Web Stories plugin's custom capabilities

web-stories-debug-capabilities.php

<?php
/**
 * Plugin Name: Web Stories Debug Capabilities
 * Description: Debugging plugin if you experience issues with capabilities and custom user roles.
 * Plugin URI: https://wp.stories.google/
 * Author: Pascal Birchler, Google
 * Author URI: https://opensource.google.com/
 * Version: 0.0.1
 * License: Apache License 2.0
 * License URI: https://www.apache.org/licenses/LICENSE-2.0
 */

add_action(
	'admin_notices',
	static function () {
		if (
			! defined( 'WEBSTORIES_VERSION' ) ||
			! function_exists( '\Google\Web_Stories\get_plugin_instance' )
		) {
			return;
		}

		$post_type_object = get_post_type_object( 'web-story' );

		if ( ! $post_type_object ) {
			return;
		}

		if ( ! get_current_screen() || 'dashboard' !== get_current_screen()->base ) {
			return;
		}

		$all_caps = $post_type_object->cap;

		$all_caps_without_meta_caps = array_filter( (array) $all_caps, static function( $value ) {
			return ! in_array( $value, [ 'edit_web-story', 'read_web-story', 'delete_web-story' ] );
		});

		?>
		<div class="notice notice-warning">
			<p>A list of all capabilities that exist for stories and whether you have them:</p>
			<table class="widefat">
				<thead>
					<tr>
						<th>Capability name</th>
						<th>Granted</th>
					</tr>
				</thead>
				<tbody>
				<?php foreach ( $all_caps_without_meta_caps as $key => $value ) :	?>
				<tr>
					<td>
						<code><?php echo $value; ?></code> (<code><?php echo $key; ?></code>)
					</td>
					<td>
						<?php if ( current_user_can( $value ) ) : ?>
						Yes :)
						<?php else : ?>
						No :(
						<?php endif; ?>
					</td>
				</tr>
				<?php endforeach; ?>
				</tbody>
			</table>
		</div>
		<?php
	}
);