Find if widget block is active

Question

I'm used to check if a widget from installed my plugin is active.

With the new block editor extending to widgets in WordPress 5.8, I was wondering if there is a way to check the widget block that I created (both old php-based and gutenberg-based widgets are installed by my plugin) is activated by the user.

Thanks!

Answer 1

One could e.g. get the widget blocks data with:

$widget_blocks = get_option( 'widget_block' );

and then loop through the array and run has_block() on the contant part, e.g. like (untested):

function is_active_block_widget_wpse( $blockname )
    $widget_blocks = get_option( 'widget_block' );
    foreach( (array) $widget_blocks as $widget_block ) {
        if ( ! empty( $widget_block['content'] ) 
             && has_block( $blockname, $widget_block['content'] ) 
        ) {
            return true;
        }
    }
    return false;
}

to find if a given blockname is an active widget:

is_active_block_widget_wpse( 'my-plugin/my-block' )

We note that this simple implementation assumes none inactive block widgets.

Other helpful functions: wp_get_sidebars_widgets() and is_active_widget()