Disable purchase and add to cart specific product with checkbox into inventory setting product admin page and replace with required inquiry (Richiedi un preventivo) contact form

Disable purchase and add to cart specific product with checkbox into inventory setting product admin page and replace with required inquiry (Richiedi un preventivo) contact form.php

<?php

/*
 * Disable purchase and add to cart specific product with checkbox into inventory setting product admin page and replace with required inquiry (Richiedi un preventivo) contact form
 */

// Add checkbox
function action_woocommerce_product_options_inventory_product_data() {
    // Checkbox
    woocommerce_wp_checkbox( array( 
        'id'             => '_prevent_add_to_cart_button', // Required, it's the meta_key for storing the value (is checked or not)
        'label'          => __( 'Richiedi un preventivo', 'woocommerce' ), // Text in the editor label
        'desc_tip'       => false, // true or false, show description directly or as tooltip
        'description'    => __( 'Si', 'woocommerce' ) // Provide something useful here
    ) );
}
add_action( 'woocommerce_product_options_inventory_product_data', 'action_woocommerce_product_options_inventory_product_data', 10, 0 );
        
// Save Field
function action_woocommerce_admin_process_product_object( $product ) {
    // Isset, yes or no
    $checkbox = isset( $_POST['_prevent_add_to_cart_button'] ) ? 'yes' : 'no';

    // Update meta
    $product->update_meta_data( '_prevent_add_to_cart_button', $checkbox );
}
add_action( 'woocommerce_admin_process_product_object', 'action_woocommerce_admin_process_product_object', 10, 1 );

// Is_purchasable (simple)
function filter_woocommerce_is_purchasable( $purchasable, $product ) {
    // Get meta
    $hide_add_to_cart_button = $product->get_meta( '_prevent_add_to_cart_button' );
    
    // Compare
    if ( $hide_add_to_cart_button == 'yes' ) {
        $purchasable = false;
    }

    return $purchasable;
}
add_filter( 'woocommerce_is_purchasable', 'filter_woocommerce_is_purchasable', 10, 2 );

// Is_purchasable (variable)
function filter_woocommerce_variation_is_purchasable( $purchasable, $product ) {
    $hide_add_to_cart_button = get_post_meta( $product->get_parent_id(), '_prevent_add_to_cart_button', true );

    // Compare
    if ( $hide_add_to_cart_button == 'yes' ) {
        $purchasable = false;
    }

    return $purchasable;
}
add_filter( 'woocommerce_variation_is_purchasable', 'filter_woocommerce_variation_is_purchasable', 10, 2 );

// Add request a quote button with form if request checkbox is true
function button_request_a_quote($purchasable){
	global $product;
	
	// Compare
	 if ( ! $product->is_purchasable() ) {
	  echo '<button type="submit" id="trigger_cf" class="single_add_to_cart_button button alt">Richiedi un preventivo</button>';
   echo '<div id="product_inq" style="display:none">';
   echo do_shortcode('[contact-form-7 id="4542" title="Richiedi un preventivo"]');
   echo '</div>';
   wc_enqueue_js( "
      $('#trigger_cf').on('click', function(){
         if ( $(this).text() == 'Richiedi un preventivo' ) {
            $('#product_inq').css('display','block');
            $('#trigger_cf').html('Chiudi');
         } else {
            $('#product_inq').hide();
            $('#trigger_cf').html('Richiedi un preventivo');
         }
      });
   " );
	 
	 }
}

add_action('woocommerce_single_product_summary', 'button_request_a_quote', 20);