Custom WP caps for media library

gistfile1.txt

function em_setup_media_permissions() {
    add_filter( 'user_has_cap', 'em_grant_media_permissions_except_subscriber', 1000, 4 );
}

// add custom caps to enable media permissions for custom roles
function em_grant_media_permissions_except_subscriber( $allcaps, $caps, $args, $user ) {

	$post_id = isset( $_REQUEST['post'] ) ? $_REQUEST['post'] : ( isset( $args[2] ) ? $args[2] : null );
	if ( ! $post_id ) {
		return $allcaps;
	}

    // Check if the user has a role in a array or roles
	$allowed_roles = array(
		'news_editor',
		'events_editor',
	);
	// now check if the user has any of the above roles
	if ( array_intersect( $allowed_roles, $user->roles ) ) {
        // Check if we're dealing with a specific post (like a media attachment)
        $post_id = isset( $_REQUEST['post'] ) ? $_REQUEST['post'] : ( isset( $args[2] ) ? $args[2] : null );

        if ( $post_id ) {
            $post = get_post( $post_id );

            // Check if it's an attachment and the capability being checked is related to post management
            if ( $post && $post->post_type == 'attachment' ) {
                // Grant capabilities to edit, delete, and upload files
                $capabilities = array(
			'manage_posts',
			'create_posts',
			'edit_post',
			'edit_others_posts',
			'edit_posts',
			'delete_posts',
			'delete_others_posts',
			'publish_posts',
			'publish_others_posts',
			'edit_others_posts',
			'edit_files',
			'upload_files',
                );
		$allcaps     += array_fill_keys( $capabilities, 1 );
		return $allcaps;
            }
        }
    }

    return $allcaps;
}