Add To Cart button Text Change Based on Discount - woocommerce

Question

This will change the text into "Add again?" when the customer clicks "Add to cart" and I'm wondering how to change this into applying a discount each time the button is clicked.
Code:
add_filter( 'woocommerce_product_single_add_to_cart_text', 'woo_add_to_cart_again' );
function woo_add_to_cart_again() {
global $woocommerce;
foreach($woocommerce->cart->get_cart() as $cart_item_key => $values ) {
$_product = $values['data'];
if( get_the_ID() == $_product->id ) {
return __('Add Again', 'woocommerce');
}
}
return __('Add to cart', 'woocommerce');
}
When clicked the first time, add to cart as normal but change the button text into "Buy again & Get 5% OFF", after pressed the 2nd time, text changes into "Buy 3 and get 10% OFF" and the discount should apply to the product, not the cart.
I would like for this to be a checkbox option beside "Downloadable" in WooCommerce Admin when creating a new product. Any help is highly appreciated.

Answer 1

first to change the text based on the quantity i just added an if condition to your function to check the quantity for that specific product in the cart and change the text accordingly as follow:
add_filter( 'woocommerce_product_single_add_to_cart_text', 'woo_add_to_cart_again' );
function woo_add_to_cart_again() {
global $woocommerce;
foreach ( $woocommerce->cart->get_cart() as $cart_item_key => $values ) {
$_product = $values['data'];
if ( $values['quantity'] == 1 && get_the_ID() == $_product->id ) {
return __( 'Buy again & Get 5% OFF', 'woocommerce' );
}
if ( $values['quantity'] == 2 && get_the_ID() == $_product->id ) {
return __( 'Buy 3 and get 10% OFF', 'woocommerce' );
}
if ( $values['quantity'] > 2 && get_the_ID() == $_product->id ) {
return __( 'Add Again', 'woocommerce' );
}
}
return __( 'Add to cart', 'woocommerce' );
}
Note: if you want to change the text in the archive page too you can use woocommerce_product_add_to_cart_text hook and added it to the above code as follow:
add_filter( 'woocommerce_product_single_add_to_cart_text', 'woo_add_to_cart_again' );
add_filter( 'woocommerce_product_add_to_cart_text', 'woo_add_to_cart_again' );
Then we need to calculate the price for those products which is qualified for the discount and add the discount based on the product prices.
We are going to use woocommerce_cart_calculate_fees to insert this discount to our cart as follow :
add_action( 'woocommerce_cart_calculate_fees', 'add_discount' );
function add_discount( WC_Cart $cart ) {
$discounts = []; //Store the disocunts in array
foreach ( $cart->get_cart() as $cart_item_key => $values ) {
$_product = $values['data'];
if ( $values['quantity'] == 2 ) {
// Calculate the discount amount
$product_price = ( $_product->get_sale_price() ) ? $_product->get_sale_price() : $_product->get_regular_price();
$price = $product_price * 2;
array_push( $discounts, $price * 0.05 ); //Push the discount
}
if ( $values['quantity'] > 2 ) {
// Calculate the discount amount
$product_price = ( $_product->get_sale_price() ) ? $_product->get_sale_price() : $_product->get_regular_price();
$price = $product_price * $values['quantity'];
$discount = $price * 0.1;
array_push( $discounts, $price * 0.1 );//Push the discount
}
}
$cart->add_fee( 'Your Disocunt', -array_sum( $discounts ) );
}
Updated:
To Change the add_to_cart text when using Ajax actually it's already answered in here By #LoicTheAztec at this link and with little modification you can achieve your target goal as follow:
add_action( 'wp_footer', 'change_add_to_cart_jquery' );
function change_add_to_cart_jquery() {
if ( is_shop() || is_product_category() || is_product_tag() ) : ?>
<script type="text/javascript">
(function ($) {
$('a.add_to_cart_button').click(function () {
$this = $(this);
if (typeof $($this).attr('data-qty') == 'undefined') {
$($this).text('Buy again & Get 5% OFF');
$($this).attr('data-qty', 1);
return;
}
if ($($this).attr('data-qty') == 1) {
$($this).text('Buy 3 and get 10% OFF');
$($this).attr('data-qty', 2);
return
}
$($this).text('Add Again');
});
})(jQuery);
</script>
<?php
endif;
}
of course the code above has been tested.