Sanitize Builder Data

add_action( 'init', 'swbd_sanitize_builder_data_structure');

// swbd_sanitize_builder_data_structure
function swbd_sanitize_builder_data_structure() {
    $directory_types = get_terms([
        'taxonomy'   => ATBDP_DIRECTORY_TYPE,
        'hide_empty' => false,
    ]);

    if ( empty( $directory_types ) ) { return; }

    foreach ( $directory_types as $directory_type ) {
        swbd_sanitize_single_listings_contents_data_structure( $directory_type->term_id );
    }
}

// swbd_sanitize_single_listings_contents_data_structure
function swbd_sanitize_single_listings_contents_data_structure( $directory_type_id = 0 ) {
    $single_listings_contents = get_term_meta( $directory_type_id, 'single_listings_contents', true );

    if ( ! isset( $single_listings_contents['fields'] ) && ! isset( $single_listings_contents['groups'] ) ) return;
    if ( ! is_array( $single_listings_contents['groups'] ) ) return;

    $fields_keys = ( is_array( $single_listings_contents['fields'] ) ) ? array_keys( $single_listings_contents['fields'] ) : [];

    $fields_log = [];

    foreach( $single_listings_contents['groups'] as $group_key => $group ) {
        $fields_in_group = $group['fields'];

        foreach ( $fields_keys as $field_key ) {
            if ( ! isset( $fields_log[ $field_key ] ) ) {
                $fields_log[ $field_key ] = [];
            }

            if ( in_array( $field_key, $fields_in_group ) ) {
                $fields_log[ $field_key ][] = $group_key;
            }
        }
    }

    foreach ( $fields_log as $field_key => $field_value ) {
        if ( ! empty( $field_value ) ) continue;

        unset( $single_listings_contents['fields'][ $field_key ] );
    }

    update_term_meta( $directory_type_id, 'single_listings_contents', $single_listings_contents );
}