Woocommerce minimum order by category/quantity - php

Question

I'm wondering if it would be possible to create an if statement where if a customer hasn't added enough (quantity - not price) of a specific product category to their order, a message shows up saying they need to add more to avoid a surcharge. I'm thinking something along the lines of the minimum order amount snippet documented here:
add_action( 'woocommerce_checkout_process', 'wc_minimum_order_amount' );
function wc_minimum_order_amount() {
global $woocommerce;
$minimum = 50;
if ( $woocommerce->cart->total() < $minimum ) {
$woocommerce->add_error( sprintf( 'You must have an order with a minimum of %s to place your order.' , $minimum ) );
}
}
Any help would be greatly appreciated.

Answer 1

This might be done by using the woocommerce_checkout_process and woocommerce_before_cart Woocommerce Hooks.
So add this code at your theme's functions.php file (change the Name Your category string):
add_action( 'woocommerce_checkout_process', 'wc_minimum_order_amount' );
add_action( 'woocommerce_before_cart' , 'wc_minimum_order_amount' );
function wc_minimum_order_amount() {
$minimum = 50; //Qty product
if ( WC()->cart->cart_contents_count < $minimum ) {
$draught_links = array();
foreach(WC()->cart->get_cart() as $cart_item_key => $values ) {
$_product = $values['data'];
$terms = get_the_terms( $_product->id, 'product_cat' );
foreach ($terms as $term) {
$draught_links[] = $term->name;
}
}
if (in_array("Name Your category", $draught_links)){
$on_draught = true;
}else{
$on_draught = false;
}
if( is_cart() ) {
if($on_draught){
wc_print_notice(
sprintf( 'You must have an order with a minimum of %s to place your order, your current order total is %s.' ,
$minimum ,
WC()->cart->cart_contents_count
), 'error'
);
}
} else {
if($on_draught){
wc_add_notice(
sprintf( 'You must have an order with a minimum of %s to place your order, your current order total is %s.' ,
$minimum ,
WC()->cart->cart_contents_count
), 'error'
);
}
}
}
}

Answer 2

From the WooCommerce Docs
public float $cart_contents_count - The total count of the cart items.
So it stands to reason that this should do what you need:
add_action( 'woocommerce_checkout_process', 'wc_minimum_order_amount' );
function wc_minimum_order_amount() {
global $woocommerce;
$minimum = 50;
if ( $woocommerce->cart->cart_contents_count < $minimum ) {
$woocommerce->add_error( sprintf( 'You must have an order with a minimum of %s to place your order.' , $minimum ) );
}
}