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

<?php

/*
 * Plugin Name: Prijzen per poscodeereeks.
 * Description:  Producten worden gefiltered aan de hand van opgegegeven postcodereksen.Klanten met een postcode Die in de opgegegeven postcode reeks vallen zullen een lokale prijs zien. Waar iedereen die niet in de reeks vallen de overige regios prijs te zien krijgt.
 * Author: Remo Zaros
 * Version: 0.9.6
 * 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 = ABSPATH . 'wp-pppr-salt.php';
  if ( file_exists( $salt_file ) ) {
      require_once $salt_file;
  }
}

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_action("template_redirect", [$this, "redirect_if_missing_tag"]);
        add_action(
            "woocommerce_variation_options_pricing",
            [$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 controleer_postcode_op_woocommerce_paginas() 
    {
      if (is_admin() || defined('DOING_AJAX')) {
          return;
      }

      // 2. Define target pages (Product, Cart, Checkout, etc., but NOT the Shop home)
      if (
          (is_product() ||
           is_product_category() ||
           is_product_tag() ||
           is_cart() ||
           is_checkout() ||
           is_account_page()) &&
          !is_shop()
      ) {
          // 3. Retrieve cookie safely (null coalescing prevents "Undefined index" errors)
          $cookie_string = $_COOKIE['PPPR'] ?? '';

          // 4. Validate: Check if empty OR if the signature is invalid (tampered)
          // verify_ppp_cookie() returns false if the hash doesn't match the data
          if (empty($cookie_string) || !verify_ppp_cookie($cookie_string)) {
              
              // Optional: Clear the invalid cookie from the browser immediately
              setcookie('PPPR', '', time() - 3600, '/');
               $shop_url = wc_get_page_permalink('shop');
            
            // Fallback to home URL if shop page is not set
            if ($shop_url === -1) {
                $shop_url = home_url('/');
            }           
              // 5. Redirect to the shop/home page to force postcode selection
              wp_redirect($shop_url);
              exit();
          }
          
          // Optional: If valid, you can now safely access the data
          // $is_local = ($cookie_string[0] === '1');
      }
    }    
    */

    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()) {
                wp_redirect(home_url("/winkel/"));
                exit();
            }
        }
    }

    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;
    }
}

new PrijsPerPostcode();