WooCommerce - Transpose Cart loop in Order loop for pdf invoices - php

Question

I'm using woocommerce and "Print Invoices & Packing lists"
available at "https://woocommerce.com/products/print-invoices-packing-lists/" .
For Display the Total Saving in the woocommerce cart & checkout pages I'm used this code and works perfectly :
function bbloomer_wc_discount_total() {
global $woocommerce;
$cart_subtotal = $woocommerce->cart->cart_contents;
$discount_total = 0;
foreach ($woocommerce->cart->cart_contents as $product_data) {
if ($product_data['variation_id'] > 0) {
$product = wc_get_product( $product_data['variation_id'] );
} else {
$product = wc_get_product( $product_data['product_id'] );
}
if ( !empty($product->sale_price) ) {
$discount = ($product->regular_price - $product->sale_price) * $product_data['quantity'];
$discount_total += $discount;
}
}
if ( $discount_total > 0 ) {
echo '<tr class="cart-discount">
<th>'. __( 'Total Saving :', 'woocommerce' ) .'</th>
<td data-title=" '. __( 'Total Saving :', 'woocommerce' ) .' ">'
. wc_price($discount_total+$woocommerce->cart->discount_cart) .'</td>
</tr>';
}
}
add_action( 'woocommerce_cart_totals_after_order_total', 'bbloomer_wc_discount_total');
add_action( 'woocommerce_review_order_after_order_total', 'bbloomer_wc_discount_total');
This function based in the woocommerce cart contents .
How I can Display The Total Saving in the Html Invoice generated By Print Invoices & Packing lists Plugin ( based On the Order Instead of the cart contents ) in the plugin Hooks like :
add_action( 'wc_pip_after_header', 'bbloomer_wc_discount_total');
add_action( 'wc_pip_document_header', 'bbloomer_wc_discount_total');

Answer 1

— Update 2 — (Added compatibility for WooCommerce version 3+)
Now as I know you are using WooCommerce PDF Invoices & Packing Slips plugin.
This code can only be used directly in invoice.php PIP template at the beginning, replacing <?php global $wpo_wcpdf ?> by this:
<?php
global $wpo_wcpdf, $woocommerce;
// Get the order object
$_order = $wpo_wcpdf->export->order;
foreach ( $_order->get_items() as $item ) {
// Added WC 3+ compatibility
$quantity = method_exists( $item, 'get_quantity' ) ? $item->get_quantity() : $item['quantity'];
$variation_id = method_exists( $item, 'get_variation_id' ) ? $item->get_variation_id() : $item['variation_id'];
$_product = version_compare( WC_VERSION, '3.0', '<' ) ? wc_get_product( $item['product_id'] ) : $item->get_product();
// Get the product object when it's a product variation ( Before version WC 3+)
if ( version_compare( WC_VERSION, '3.0', '<' ) )
if ($item['variation_id'] > 0) $_product = wc_get_product( $item['variation_id'] );
// Get prices
$sale_price = $_product->get_sale_price();
$regular_price = $_product->get_regular_price();
// Only when sale price exits
if ( ! empty( $sale_price ) && $sale_price > 0 ) {
$discount = ($regular_price - $sale_price) * $item->get_quantity();
$discount_total += $discount;
}
}
if ( $discount_total > 0 ) {
$display_discount = '<tr class="cart-discount">
<th>'. __( 'Total you saved :', 'woocommerce' ) .'</th>
<td data-title=" '. __( 'Total you saved :', 'woocommerce' ) .' ">' . wc_price( $discount_total + $_order->get_total_discount() ) .'</td>
</tr>';
}
?>
Then you can use it where you want in the template to output it, this way (inside html):
<?php echo $display_discount; ?>
Or (inside php code):
echo $display_discount;
This code is tested and works.