ADD PRODUCT TYPE TO BULK EDIT

add_action( 'wcfm_product_bulk_edit_start', function() {
    $product_types = apply_filters( 'wcfm_product_types', array(
        ''          => __( '— No change —', 'wc-frontend-manager' ),
        'simple'    => __( 'Simple Product', 'wc-frontend-manager' ),
        'variable'  => __( 'Variable Product', 'wc-frontend-manager' ),
        'grouped'   => __( 'Grouped Product', 'wc-frontend-manager' ),
        'external'  => __( 'External/Affiliate Product', 'wc-frontend-manager' )
    ) );

    if( count( $product_types ) == 0 ) {
        $product_types = array( ''  => __( '— No change —', 'wc-frontend-manager' ) );
    }

    ob_start();
    ?>
    <div class="inline-edit-group inline-edit-group-type">
        <label>
            <span class="wcfm_popup_label title"><?php _e( 'Type', 'wc-frontend-manager' ); ?></span>
            <span class="input-text-wrap">
                <select class="change_product_type wcfm_popup_input change_to" name="_product_type">
                <?php
                    foreach ( $product_types as $key => $value ) {
                        echo '<option value="' . esc_attr( $key ) . '">' . $value . '</option>';
                    }
                ?>
                </select>
            </span>
        </label>
    </div>
    <?php
    echo ob_get_clean();
} );

add_action( 'wcfm_product_bulk_edit_save', function( $product, $wcfm_bulk_edit_form_data ) {
    if( isset( $wcfm_bulk_edit_form_data['_product_type'] ) && ! empty( $wcfm_bulk_edit_form_data['_product_type'] ) ) {
        wp_set_object_terms( $product->get_id(), $wcfm_bulk_edit_form_data['_product_type'], 'product_type', false );
    }
}, 10, 2 );