Yith Request a quote : add a button to transfer the cart content into the quote request form

cart-to-quote.php

<?php

add_action( 'admin_post_cart_to_quote', 'do_cart_to_quote' );
add_action( 'admin_post_nopriv_cart_to_quote', 'do_cart_to_quote' );
function w_cart_to_quote() {
	$inst = YITH_Request_Quote::get_instance();
	foreach( WC()->cart->get_cart() as $k => $data ) {
		$product_id = $data['product_id'];
		$obj = array(
			'context'               => 'frontend',
			'action'                => 'yith_ywraq_action',
			'ywraq_action'          => 'add_item',
			'quantity'              => intval( $data['quantity'] ),
			'wp_nonce'              => wp_create_nonce( 'add-request-quote-' . $product_id ),
			'yith-add-to-cart'      => $product_id,
			'add-to-cart'           => $product_id,
			'product_id'            => $product_id,
			'yith_wapo_product_img' => $data['yith_wapo_product_img'],
			'yith_wapo_is_single'   => '1',
			'yith_wapo_options'     => ! empty( $data['yith_wapo_options'] ) ? $data['yith_wapo_options'] : array(),
			'yith_wapo'             => ! empty( $data['yith_wapo_options'] ) ? $data['yith_wapo_options'] : array(),
		);	
		
		if ( $v_id = $data['variation_id'] ) {
			$obj['variation_id'] = $v_id;
			if ( ! empty( $data['variation'] ) ) {
				foreach ( $data['variation'] as $k => $v ) {
					$obj[ $k ] = $v;
				}
			}
		}
		$inst->add_item( $obj );
	}
	wp_redirect( YITH_Request_Quote()->get_redirect_page_url() );
	die();
}

/**
 * Add a button on the cart page
 */
add_action( 'woocommerce_proceed_to_checkout', 'w_cart_to_quote_button', 40 );
function w_cart_to_quote_button() {
	echo '<a href="' . admin_url( 'admin-post.php?action=cart_to_quote' ) . '" class="checkout-button button alt wc-forward">Demander un devis pour ce panier</a>';
}

/**
 * Add a button on thhe mini-cart
 */
add_action( 'woocommerce_widget_shopping_cart_buttons', 'w_quote_link', 40 );
function w_quote_link() {
	echo '<a href="' . admin_url( 'admin-post.php?action=cart_to_quote' ) . '" class="button wc-forward">Demande de devis</a>';
}