wp-postcode-plugin/prijs-per-postcode.php

<?php

/*
 * Plugin Name: Prijzen per poscodeereeks.
 * Description: Producten worden gefiltered aan de hand van opgegegeven postcodereeksen.Gebruikers met een postcode die in een opgegegeven postcodereeks valt zal een lokale prijs zien. Waar elke gebruiker met een postcode die buiten eem opgegeven reeks valt zal de reguliere prijs te zien krijgen. 
 * Author: Remo Zaros
 * Version: 0.9.82
 * Text Domeain: prijs-per-postcode
 */

require_once plugin_dir_path(__FILE__) . "session_dialog.php";
require_once plugin_dir_path(__FILE__) . "admin.php";
require_once plugin_dir_path(__FILE__) . "pppr_cookie.php";

if (!defined("ABSPATH")) {
    echo "big bag of potatoes";
    exit();
}

register_activation_hook( __FILE__, 'create_pppr_salt' );
if ( ! defined( 'WP_PPPR_SALT' ) ) {
    $salt_file = __DIR__ . '/wp-pppr-salt.php'; 
    if ( file_exists( $salt_file ) ) {
        require_once $salt_file;
    }else {
      define("WP_PPPR_SALT", wp_salt( 'auth' ));
  }
}


class PrijsPerPostcode
{
    public function __construct()
    {
        add_action("init", [$this, "init"], 1);
        add_action("rest_api_init", "register_modal_api");
    }

    public function init()
    {
        
        $uri = $_SERVER["REQUEST_URI"];
        init_postcode_handlers($uri);
        init_postode_admin();

        add_filter("woocommerce_sale_flash", "__return_null");
        add_filter('woocommerce_show_variation_price', '__return_true');   
        add_action(
            "woocommerce_variation_options_pricing",
            [$this, "add_local_price_field"],
            10,
            3,
        );
        add_action(
            "woocommerce_save_product_variation",
            [$this, "save_local_price_field"],
            10,
            2,
        );
        add_action("woocommerce_before_calculate_totals", [
            $this,
            "use_local_price_if_local_postcode",
        ]);

        add_filter(
            "woocommerce_get_price_html",
            [$this, "display_local_price_on_product"],
            10,
            2,
        );
        add_action("template_redirect", [
            $this,
            "check_postcode_on_every_woocommerce_page",
        ]);
        add_filter(
            "woocommerce_variation_is_visible",
            [$this, "filter_variation_by_local_price"],
            10,
            4,
        );
        add_filter(
            "gettext",
            [$this, "change_variation_regular_price_label"],
            99,
            3,
        );

    }

    public function add_local_price_field($loop, $variation_data, $variation)
    {
        woocommerce_wp_text_input([
            "id" => "_local_price[" . $loop . "]",
            "label" =>
                __("Lokale Prijs", "woocommerce") .
                " (" .
                get_woocommerce_currency_symbol() .
                ")",
            "value" => get_post_meta($variation->ID, "_local_price", true),
            "data_type" => "price",
            "wrapper_class" => "form-row form-row-first", // Left half
        ]);
    }

    public function save_local_price_field($variation_id, $i)
    {
        $local_price = $_POST["_local_price"][$i];
        if (isset($local_price)) {
            update_post_meta(
                $variation_id,
                "_local_price",
                wc_clean($local_price),
            );
        }
    }

    public function use_local_price_if_local_postcode($cart)
    {
        if (is_admin() && !defined("DOING_AJAX")) {
            return;
        }

        foreach ($cart->get_cart() as $cart_item) {
            $product = $cart_item["data"];
            $variation_id = $product->is_type("variation")
                ? $product->get_id()
                : 0;

            if (
                $variation_id &&
                isset($_COOKIE["PPPR"]) &&
                pppr_is_local() 
            ) {
                $local_price = get_post_meta(
                    $variation_id,
                    "_local_price",
                    true,
                );
                if ($local_price) {
                    $product->set_price($local_price);
                }
            }
        }
    }

    public function check_postcode_on_every_woocommerce_page()
    {
        if (is_admin() || defined("DOING_AJAX")) {
            return;
        }

        if (
            (is_product() ||
             is_product_category() ||
             is_product_tag() ||
             is_cart() ||
             is_checkout() ||
             is_account_page()) &&
            !is_shop()
        ) {
            if (!verify_pppr_cookie_string()) {
              if (!WC()->cart->is_empty()) {
                WC()->cart->empty_cart();
             }
              wp_safe_redirect($this->get_shop_url());
              exit();
            }else{
              update_expire_pppr_cookie();
            }
        }
    }

    public function display_local_price_on_product($price_html, $product)
    {
        if (
            $product->is_type("variation") &&
            isset($_COOKIE["PPPR"]) &&
            pppr_is_local()
        ) {
            $local_price = get_post_meta(
                $product->get_id(),
                "_local_price",
                true,
            );
            if ($local_price !== "") {
                return wc_price($local_price);
            }
        }
        return $price_html;
    }

    function filter_variation_by_local_price(
        $visible,
        $variation_id,
        $parent_id,
        $variation,
    ) {
        // Ensure $variation is a valid object
        if (!$variation instanceof WC_Product_Variation) {
            $variation = wc_get_product($variation_id);
        }

        if (!$variation) {
            return false;
        }

        $price = pppr_is_local()
            ? $variation->get_meta("_local_price", true)
            : $variation->get_regular_price();

        if (empty($price) || floatval($price) == 0) {
            return false;
        }

        return $visible;
    }

    public function change_variation_regular_price_label(
        $translated_text,
        $text,
        $domain,
    ) {
        if (
            "woocommerce" === $domain &&
            is_admin() &&
            isset($_REQUEST["action"]) &&
            "woocommerce_load_variations" === $_REQUEST["action"]
        ) {
            if ($translated_text === "Reguliere prijs (%s)") {
                $translated_text = "Prijs overige regios (%s)";
            }
        }
        return $translated_text;
    }

  public function get_shop_url () {
    return  (function_exists('wcml_get_store_url')) 
      ? wcml_get_store_url() // WPML WooCommerce Multilingual
      : get_permalink(wc_get_page_id('shop')); // Fallback
  }
}

new PrijsPerPostcode();