clean up prijs-per-postcode

admin.php

@@ -40,7 +40,7 @@ function generate_admin_page()
         <ul>
             <li>Het formaat voor een reeks is #### - #### (voorbeeld: 5000 - 5199).</li>
             <li>Plaats één reeks op één regel.</li>
-            <li>Een reeks van 1 is geldig. (voorbeeld: 5000 - 5000)</li>
+            <li>Een reeks van 1 is geldig. (voorbeeld: 5000 - 5000).</li>
             <li>Om een reeks te verwijderen. Wis de reeks en sla vervolgens de wijzigen op.</li>
         </ul>
         </div>

pppr_cookie.php

@@ -40,13 +40,14 @@ function set_pppr_cookie($is_local, $street_name, $house_number, $postcode, $cit
     $signature = hash_hmac('sha256', $data_string, WP_PPPR_SALT);
     $cookie_value = $data_string . "|" . $signature;
 
-    $is_secure = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off');
+    $cookie_domain = $_SERVER['SERVER_NAME'];
+    $is_secure = is_ssl(); 
 
     setcookie("PPPR", $cookie_value, [
         'expires' => time() + 7200,
         'path' => '/',
-        'domain' => $_SERVER['SERVER_NAME'],
+        'domain' => $cookie_domain,
-        'secure' => $is_secure,   // Only send over HTTPS
+        'secure' => $is_secure, 
         'httponly' => true, // Prevent JavaScript access
         'samesite' => 'Lax' // Protect against CSRF
     ]);
@@ -55,11 +56,38 @@ function set_pppr_cookie($is_local, $street_name, $house_number, $postcode, $cit
 function unset_pppr_cookie( $path = '/') {
     unset($_COOKIE["PPPR"]);
 
-    if (empty($domain)) {
+    $domain = $_SERVER['SERVER_NAME'];
-        setcookie("PPPR", '', time() - 3600, '/');
+    $is_secure = is_ssl();
-    } else {
+
-        setcookie("PPPR", '', time() - 3600, '/' , $_SERVER['SERVER_NAME']);
+    // 3. Send the delete command with ALL matching parameters
+    setcookie(
+        "PPPR", 
+        '', 
+        time() - 3600, 
+        '/', 
+        $domain, 
+        $is_secure, // Critical: Must match the 'secure' flag used when setting
+        true        
+    );
 }
+
+function update_expire_pppr_cookie() {
+    if (!isset($_COOKIE['PPPR'])) {
+        return false;
+    }
+ 
+    $cookie_value = $_COOKIE['PPPR'];
+    $cookie_domain = $_SERVER['SERVER_NAME'];
+    $is_secure = is_ssl(); 
+
+    setcookie("PPPR", $cookie_value, [
+        'expires' => time() + 7200,
+        'path' => '/',
+        'domain' => $cookie_domain,
+        'secure' => $is_secure,
+        'httponly' => true, // Prevent JavaScript access
+        'samesite' => 'Lax' // Protect against CSRF
+    ]);
 }
 
 function verify_pppr_cookie_string() {
@@ -134,6 +162,14 @@ function get_PPPR_data() {
 }
 
 function pppr_is_local() {
-    $first_char =  $_COOKIE['PPPR'][0];
+    // Check if the cookie exists and is not empty
+    if (isset($_COOKIE['PPPR']) && !empty($_COOKIE['PPPR'])) {
+        // Ensure it's treated as a string before accessing the first character
+        $cookie_value = (string) $_COOKIE['PPPR'];
+        $first_char = $cookie_value[0] ?? '';
         return $first_char === '1';
     }
+    
+    // Return false if cookie is missing or empty
+    return false;
+}

prijs-per-postcode.php

@@ -1,10 +1,10 @@
 <?php
 
 /*
- * Plugin Name: Prijzen per poscodeereeks.
+ * Plugin Name: Prijs 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: 0.9.8
+ * Version: 0.9.090
  * Text Domeain: prijs-per-postcode
  */
 
@@ -12,11 +12,15 @@ 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();
 }
 
+/*
+ * Create salt 
+ */
 register_activation_hook( __FILE__, 'create_pppr_salt' );
 if ( ! defined( 'WP_PPPR_SALT' ) ) {
     $salt_file = __DIR__ . '/wp-pppr-salt.php'; 
@@ -28,66 +32,39 @@ if ( ! defined( 'WP_PPPR_SALT' ) ) {
 }
 
 
-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"],
+ * Init the plugin
-            10,
+ */
-            2,
+add_action("init", function() {
-        );
+    $uri = $_SERVER["REQUEST_URI"];
-        add_action("template_redirect", [
+    init_postcode_handlers($uri);
-            $this,
+    // set the admin page
-            "check_postcode_on_every_woocommerce_page",
+    init_postode_admin();
-        ]);
+  }, 1
-        add_filter(
-            "woocommerce_variation_is_visible",
-            [$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, $variation)
+/*
+ *  Set endpoint (postcode-modal/v1/submit) for the modal form.
+ */
+add_action("rest_api_init", function () {
+    register_rest_route( 'postcode-modal/v1', '/submit', array(
+        'methods'             => 'POST',
+        'callback'            => 'handle_postcode_modal',
+        'permission_callback' => '__return_true',
+    ) );
+});
+
+
+/* 
+ * Add local orice field to variation product.
+ */
+add_action("woocommerce_variation_options_pricing", 
+    function($loop, $variation_data, $variation)
     {
         woocommerce_wp_text_input([
             "id" => "_local_price[" . $loop . "]",
@@ -100,9 +77,15 @@ class PrijsPerPostcode
             "data_type" => "price",
             "wrapper_class" => "form-row form-row-first", // Left half
         ]);
-    }
+    }, 10, 3,
+);
 
-    public function save_local_price_field($variation_id, $i)
+
+/*
+ * Save the local price on product save in the admin
+ */
+add_action("woocommerce_save_product_variation",
+    function ($variation_id, $i)
     {
         $local_price = $_POST["_local_price"][$i];
         if (isset($local_price)) {
@@ -112,79 +95,36 @@ class PrijsPerPostcode
                 wc_clean($local_price),
             );
         }
-    }
+    }, 10, 2,
-
-    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;
-        }
 
+/* 
+ * Replace "Reguliere prijs" with "Prijs overige regios" 
+ * in variation prodict admin
+ */
+add_filter( "gettext", function( $translated_text, $text, $domain,) {
         if (
-            (is_product() ||
+            "woocommerce" === $domain &&
-             is_product_category() ||
+            is_admin() &&
-             is_product_tag() ||
+            isset($_REQUEST["action"]) &&
-             is_cart() ||
+            "woocommerce_load_variations" === $_REQUEST["action"]
-             is_checkout() ||
-             is_account_page()) &&
-            !is_shop()
         ) {
-            if (!verify_pppr_cookie_string()) {
+            if ($translated_text === "Reguliere prijs (%s)") {
-                wp_redirect(home_url("/winkel/"));
+                $translated_text = "Prijs overige regios (%s)";
-                exit();
             }
         }
-    }
+        return $translated_text;
-
+    }, 99, 3,
-    public function display_local_price_on_product($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(
+
+/* 
+ * Filter out variations whwre the price is 
+ * either 0 or '' in the dropdown menu product page
+ */
+add_filter("woocommerce_variation_is_visible",
+    function (
         $visible,
         $variation_id,
         $parent_id,
@@ -208,25 +148,145 @@ class PrijsPerPostcode
         }
 
         return $visible;
+    }, 10, 4,
+);
+
+
+/* 
+ * Dynamically recalculates the cart total by overriding the standard price 
+ * with a region-specific _local_price for variations when 
+ * the user's location matches the PPPR cookie criteria 
+ */
+add_action("woocommerce_before_calculate_totals", function($cart)
+    {
+        if (is_admin() && !defined("DOING_AJAX")) {
+            return;
         }
 
-    public function change_variation_regular_price_label(
+        foreach ($cart->get_cart() as $cart_item) 
-        $translated_text,
+        {
-        $text,
+            $product = $cart_item["data"];
-        $domain,
+            $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);
+                }
+            }
+        }
+    }
+);
+
+
+/* 
+ * Filter to display the regular or local price on teh product page. 
+ */
+add_filter( "woocommerce_get_price_html",
+    function($price_html, $product)
+    {
         if (
-            "woocommerce" === $domain &&
+            $product->is_type("variation") &&
-            is_admin() &&
+            isset($_COOKIE["PPPR"]) &&
-            isset($_REQUEST["action"]) &&
+            pppr_is_local()
-            "woocommerce_load_variations" === $_REQUEST["action"]
         ) {
-            if ($translated_text === "Reguliere prijs (%s)") {
+            $local_price = get_post_meta(
-                $translated_text = "Prijs overige regios (%s)";
+                $product->get_id(),
+                "_local_price",
+                true,
+            );
+            if ($local_price !== "") {
+                return wc_price($local_price);
             }
         }
-        return $translated_text;
+        return $price_html;
-    }
+    }, 10, 2,
+);
+
+
+/* 
+ * Enforces region-locking by clearing the cart and redirecting users to 
+ * the shop page if their location cookie is invalid or expired when 
+ * accessing key WooCommerce pages. 
+ */
+add_action("template_redirect",
+    function ()
+    {
+        if (is_admin() || defined("DOING_AJAX")) {
+            return;
         }
 
-new PrijsPerPostcode();
+        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(get_shop_url());
+              exit();
+            }else{
+              update_expire_pppr_cookie();
+            }
+        }
+    }
+);
+
+
+/* 
+ * Chack or postcode is still valid when pressing the buy button 
+ */
+add_action( 'woocommerce_after_checkout_validation', function( $data, $errors ) {
+    // 1. Controleer of de cookie bestaat en geldig is
+    if ( ! isset( $_COOKIE['PPPR'] ) || ! verify_pppr_cookie_string() ) {
+        $errors->add( 
+            'pppr_cookie_invalid', 
+            __( '<strong>Fout:</strong> Sessie verlopen. Vernieuw de pagina en vul je postcode opnieuw in.', 'woocommerce' ) 
+        );
+        return; // Stop hier, geen zin om verder te checken
+    }
+
+    $pppr_data = get_PPPR_data();
+
+    if ( ! $pppr_data || empty( $pppr_data['postcode'] ) ) {
+        $errors->add( 
+            'pppr_data_missing', 
+            __( '<strong>Fout:</strong> Kon postcode niet laden.', 'woocommerce' ) 
+        );
+        return;
+    }
+
+    // 3. Normalizeer postcodes (gebruik de juiste variabelen!)
+    $cookie_pc   = strtoupper( str_replace( ' ', '', $pppr_data['postcode'] ) );
+    $shipping_pc = strtoupper( str_replace( ' ', '', $data['shipping_postcode'] ) );
+
+    // 4. Vergelijk
+    if ( $cookie_pc !== $shipping_pc ) {
+        wc_add_notice( 
+            __( '<strong>Fout:</strong> Afleverpostcode komt niet overeen met de eerder ingevulde postcode.', 'woocommerce' ), 
+            'error' 
+        );
+    }
+}, 10, 2 );
+
+
+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
+}

session_dialog.php

@@ -88,10 +88,8 @@ function send_postcode_data()
                     body: JSON.stringify(payload)
                 });
 
-                // Parse altijd eerst de JSON, zelfs bij HTTP fouten
                 const data = await resp.json();
 
-                // UI: Reset knop
                 sndBtn.disabled = false;
                 sndBtnLdr.style.opacity = "0";
                 sndBtnTxt.style.opacity = "1";
@@ -269,10 +267,10 @@ function handle_postcode_modal($data)
     }
     set_pppr_cookie(
       postcode_in_range($params["postcode"]), 
-      $straatnaam, 
+      trim($straatnaam), 
-      $params["huisnummer"], 
+      trim($params["huisnummer"]), 
-      $params["postcode"], 
+      trim($params["postcode"]), 
-      $woonplaats
+      trim($woonplaats)
     );
 
     return new WP_REST_Response([
@@ -281,15 +279,6 @@ function handle_postcode_modal($data)
     ], 200);
 }
 
-function register_modal_api()
-{
-    register_rest_route("postcode-modal/v1", "submit", [
-        "methods" => "POST",
-        "callback" => "handle_postcode_modal",
-        "permission_callback" => "__return_true",  
-    ]);
-}
-
 function verify_postcode($postcode)
 {
     if (!preg_match('/^[0-9]{4}\s?[A-Za-z]{2}$/', $postcode) === 1) {
@@ -345,7 +334,7 @@ function getStraatnaam($postcode, $huisnummer)
         ];
     }
 
-    // Geef de RUWE response terug (inclusief meta, error, results, etc.)
+    // Give me back RUWE data (inclusive meta, error, results, etc.)
     return $data;
 }
 
@@ -376,126 +365,154 @@ function postcode_in_range($postcode)
     return false;
 }
 
-function modify_checkout_with_js()
+function modify_checkout_with_js() {
-{
+    if ( ! is_checkout() || ( is_wc_endpoint_url() && ! is_wc_endpoint_url( 'order-received' ) ) ) {
-    if (
-        !is_checkout() ||
-        (is_wc_endpoint_url() && !is_wc_endpoint_url("order-received"))
-    ) {
         return;
     }
-    $data = get_PPPR_data();
 
-    $city = $data["city"];
+    $data = get_PPPR_data();
-    $postcode = $formatted_postcode = preg_replace(
+    if ( empty( $data ) ) {
-        "/(\d+)([A-Z]+)/",
+        return;
-        '$1 $2',
+    }
-        strtoupper($data["postcode"]),
+
-    );
+    $city = esc_js( $data['city'] );
-    $address =
+    $postcode = esc_js( preg_replace( '/(\d+)([A-Z]+)/', '$1 $2', strtoupper( $data['postcode'])));
-        $data["street"] . " " . strtoupper($data["house_number"]);
+    $address = esc_js( $data['street'] . ' ' . strtoupper( $data['house_number']));
+
+    // Enqueue script properly to handle dependencies and nonces
+    wp_enqueue_script( 'jquery' );
+    wp_localize_script( 'jquery', 'ajax_object', array(
+        'ajax_url' => admin_url( 'admin-ajax.php' ),
+        'nonce'    => wp_create_nonce( 'unset_my_session_nonce' )
+    ) );
 
     echo <<<HTML
     <script type="text/javascript" id="set_pppr_fields">
-      jQuery(document).ready(function($) {
+    document.addEventListener('DOMContentLoaded', function() {
         
-        function lockCheckoutFields() {
+        // Safari Fix: Handle back/forward cache (bfcache)
-          if (typeof wp !== 'undefined' && wp.data && wp.data.dispatch) {
+        window.addEventListener('pageshow', function(event) {
-            const store = 'wc/store/cart';
+            if (event.persisted || (typeof wp !== 'undefined' && wp.data)) {
-
+                initPPPRFields();
-            wp.data.dispatch(store).setShippingAddress({
+            }
-              first_name: '',
-              last_name: '',
-              address_1: 'Tjeuke Timmermansstraat 43',
-              address_2: '',
-              city: 'Tilburg',
-              state: '',
-              postcode: '5041 EK',
-              country: 'NL',
-              phone: '',
-              email: ''
         });
 
+        function initPPPRFields() {
+            // Wait for React/WC Blocks to mount
             setTimeout(() => {
-              const targets = '#shipping-postcode, #shipping-city, #shipping-address_1';
+                const addressVal = '{$address}';
+                const cityVal = '{$city}';
+                const postcodeVal = '{$postcode}';
 
-              $(targets).each(function() {
+                // Map WC Blocks field selectors
-                // Voeg readonly attribuut toe (voor toegankelijkheid)
+                const fields = [
-                $(this).prop('readonly', true);
+                    { id: 'shipping-address_1', val: addressVal },
+                    { id: 'shipping-city', val: cityVal },
+                    { id: 'shipping-postcode', val: postcodeVal }
+                ];
 
-                $(this).css({
+                fields.forEach(field => {
-                  'background-color': '#f9f9f9',
+                    // 1. Try Redux Dispatch (Standard)
-                  'cursor': 'not-allowed',
+                    if (typeof wp !== 'undefined' && wp.data && wp.data.dispatch) {
-                  'pointer-events': 'none' // Blokkeert alle muisklikken in het veld
+                        try {
+                            wp.data.dispatch('wc/store/cart').setShippingAddress({ [field.id.replace('shipping-', '')]: field.val });
+                        } catch(e) { console.warn('Redux update skipped', e); }
+                    }
+
+                    // 2. Force DOM Update (Safari Fallback)
+                    // Select both legacy and Blocks inputs
+                    const inputs = document.querySelectorAll('#' + field.id + ', input[name="' + field.id.replace('shipping-', '') + '"]');
+                    
+                    inputs.forEach(input => {
+                        if (input.value !== field.val) {
+                            input.value = field.val;
+                            
+                            // CRITICAL FOR SAFARI: Manually trigger events so React notices
+                            ['input', 'change'].forEach(evtType => {
+                                input.dispatchEvent(new Event(evtType, { bubbles: true, cancelable: true }));
+                            });
+                        }
+                        
+                        // 3. Apply Visual Lock
+                        input.setAttribute('data-pppr-locked', 'true');
+                        input.readOnly = true; 
                     });
                 });
 
-             if ($('.postcode-reset').length === 0) {
+                // Inject Reset Button once
-                const div = document.createElement("div");
+                if (!document.querySelector('.postcode-reset')) {
-                div.setAttribute("class", "postcode-reset");
+                    const cityContainer = document.querySelector('.wc-block-components-address-form__city');
+                    if (cityContainer) {
+                        const div = document.createElement('div');
+                        div.className = 'postcode-reset';
+                        div.style.display = 'block';
+                        div.style.width = '100%';
+                        div.style.marginTop = '10px';
+
                         div.innerHTML = `
-                  <a href="#" class="reset-postcode-show-comfirm" style="font-size:12px; text-decoration:underline;">Reset postcode.</a>
+                            <a href="#" class="reset-postcode-show-comfirm" style="font-size:12px; text-decoration:underline; display:block; margin-top:5px;">Reset postcode.</a>
-                  <span class="bevestiging" style="display:none; font-size:12px;"> 
+                            <span class="bevestiging" style="display:none; font-size:12px; margin-top:5px;"> 
                                 Deze handeling leegt ook de winkelwagen. Weet je het zeker?
                                 <a href="#" class="accept" style="color:red; font-weight:bold;">&nbsp;&nbsp;JA&nbsp;</a>/
                                 <a href="#" class="decline">&nbsp;nee&nbsp;&nbsp;</a>
                             </span>`;
+                        cityContainer.parentNode.insertBefore(div, cityContainer.nextSibling);
 
-                div.style.width = "100%";
+                        // Event Listeners (using delegation for safety)
-                document.querySelector(".wc-block-components-address-form__city")?.after(div);
+                        div.addEventListener('click', function(e) {
-
-                $('.reset-postcode-show-comfirm').on('click', function(e) {
                             e.preventDefault();
-                  $(this).hide();
+                            if (e.target.classList.contains('reset-postcode-show-comfirm')) {
-                  $(this).next('.bevestiging').show();
+                                e.target.style.display = 'none';
-                });
+                                div.querySelector('.bevestiging').style.display = 'block';
-                $('.decline').on('click', function(e) {
+                            } else if (e.target.classList.contains('decline')) {
-                  e.preventDefault();
+                                div.querySelector('.bevestiging').style.display = 'none';
-                  $(this).closest('.bevestiging').hide();
+                                div.querySelector('.reset-postcode-show-comfirm').style.display = 'block';
-                  $('.reset-postcode-show-comfirm').show();
+                            } else if (e.target.classList.contains('accept')) {
-                });
+                                fetch(ajax_object.ajax_url, {
-
+                                    method: 'POST',
-
+                                    headers: {
-                $('.accept').on('click', function(e) {
+                                        'Content-Type': 'application/x-www-form-urlencoded',
-                  e.preventDefault();
-
-                  $.ajax({
-                    url: ajax_object.ajax_url,
-                    type: 'POST',
-                    data: {
-                        action: 'unset_my_session',       // Matches wp_ajax_ hook
-                        nonce: ajax_object.nonce          // Matches wp_create_nonce action
                                     },
-                    success: function(response) {
+                                    body: new URLSearchParams({
-                        if (response.success) {
+                                        action: 'unset_my_session',
-                            location.reload();
+                                        nonce: ajax_object.nonce
-                        } else {
+                                    })
-                            console.error('Server returned error:', response.data);
+                                })
-                            alert('Failed to reset session: ' + (response.data || 'Unknown error'));
+                                .then(res => res.json())
-                        }
+                                .then(res => {
-                    },
+                                    if (res.success) location.reload();
-                    error: function(xhr, status, error) {
+                                    else alert('Failed to reset: ' + (res.data || 'Unknown error'));
-                        console.error('AJAX request failed:', status, error);
+                                })
-                        console.log('Response Text:', xhr.responseText); // Check for PHP fatal errors
+                                .catch(err => console.error('AJAX error:', err));
                             }
                         });
-              });
-            }
-
-          jQuery(document.body).trigger('update_checkout');
-
-            }, 800); // Iets langere delay voor React rendering
-          } else {
-            console.error('WooCommerce Blocks API is niet beschikbaar');
                     }
                 }
 
-        lockCheckoutFields();
+                // Add CSS for locked state dynamically
+                if (!document.getElementById('pppr-styles')) {
+                    const style = document.createElement('style');
+                    style.id = 'pppr-styles';
+                    style.textContent = `
+                        input[data-pppr-locked="true"] {
+                            background-color: #f9f9f9 !important;
+                            cursor: not-allowed !important;
+                            pointer-events: none !important;
+                            opacity: 0.7;
+                        }
+                    `;
+                    document.head.appendChild(style);
+                }
 
-        let updateTimeout;
+            }, 600); // Delay for WC Blocks hydration
-        $(document.body).on('updated_checkout', function() {
+        }
-          clearTimeout(updateTimeout);
+
-          updateTimeout = setTimeout(lockCheckoutFields, 500);
+        // Initialize on load
+        initPPPRFields();
+
+        // Re-apply if checkout updates (e.g. shipping method change)
+        document.body.addEventListener('updated_checkout', function() {
+            setTimeout(initPPPRFields, 400);
         });
     });
     </script>
@@ -528,6 +545,7 @@ function load_assets_reset_postcode_on_checkout()
     }
 }
 
+
 function handle_unset_session_fetch()
 {
   // Verify the nonce for security