From e78733efe84165874e9753a3b101e708140c4911 Mon Sep 17 00:00:00 2001
From: Flatlogic Bot <support@flatlogic.com>
Date: Fri, 12 Dec 2025 20:15:28 +0000
Subject: [PATCH] ENG with EUR

---
 admin/menu.php                              |  3 +
 admin/settings.php                          | 82 +++++++++++++++++++++
 cart.php                                    |  9 ++-
 checkout.php                                | 11 +--
 db/migrations/027_create_settings_table.sql |  8 ++
 includes/auth.php                           |  4 +
 includes/currency.php                       | 65 ++++++++++++++++
 includes/i18n.php                           |  6 ++
 index.php                                   |  9 ++-
 order_details.php                           |  9 ++-
 orders.php                                  |  3 +-
 product.php                                 |  5 +-
 related_suggestions.php                     |  9 ++-
 13 files changed, 199 insertions(+), 24 deletions(-)
 create mode 100644 admin/settings.php
 create mode 100644 db/migrations/027_create_settings_table.sql
 create mode 100644 includes/currency.php
diff --git a/admin/menu.php b/admin/menu.php
index 8475243..9f01bd7 100644
--- a/admin/menu.php
+++ b/admin/menu.php
@@ -25,6 +25,9 @@
                 <li class="nav-item">
                     <a class="nav-link" href="attribute_keys.php">Atrybuty</a>
                 </li>
+                <li class="nav-item">
+                    <a class="nav-link" href="settings.php">Ustawienia</a>
+                </li>
             </ul>
             <ul class="navbar-nav ms-auto">
                 <li class="nav-item">
diff --git a/admin/settings.php b/admin/settings.php
new file mode 100644
index 0000000..b603b32
--- /dev/null
+++ b/admin/settings.php
@@ -0,0 +1,82 @@
+<?php
+require_once __DIR__ . '/../includes/init.php';
+require_once __DIR__ . '/../includes/auth.php';
+require_admin();
+
+$db = db();
+
+$rate = 0.23; // Default
+$message = '';
+
+// Fetch current rate
+$stmt = $db->prepare("SELECT value FROM settings WHERE `key` = 'pln_to_eur_rate'");
+$stmt->execute();
+$result = $stmt->fetch(PDO::FETCH_ASSOC);
+if ($result) {
+    $rate = (float)$result['value'];
+}
+
+// Handle form submission
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    if (isset($_POST['pln_to_eur_rate'])) {
+        $new_rate = filter_input(INPUT_POST, 'pln_to_eur_rate', FILTER_VALIDATE_FLOAT);
+        
+        if ($new_rate !== false && $new_rate > 0) {
+            $stmt = $db->prepare("UPDATE settings SET value = :value WHERE `key` = 'pln_to_eur_rate'");
+            $stmt->execute([':value' => $new_rate]);
+            
+            // Verify update, or insert if it failed (e.g., key didn't exist)
+            if ($stmt->rowCount() === 0) {
+                $insert_stmt = $db->prepare("INSERT INTO settings (`key`, value) VALUES ('pln_to_eur_rate', :value)");
+                $insert_stmt->execute([':value' => $new_rate]);
+            }
+            
+            $rate = $new_rate;
+            $message = 'Kurs został zaktualizowany.';
+        } else {
+            $message = 'Wprowadź poprawną wartość kursu (liczba większa od 0).';
+        }
+    }
+}
+
+$page_title = 'Ustawienia Walut';
+
+?>
+
+<?php require_once __DIR__ . '/../includes/html_head.php'; ?>
+<body>
+    <div class="container-fluid">
+        <div class="row">
+            <?php require_once __DIR__ . '/menu.php'; ?>
+            <main class="col-md-9 ms-sm-auto col-lg-10 px-md-4">
+                <div class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-3 border-bottom">
+                    <h1 class="h2"><?= $page_title ?></h1>
+                </div>
+
+                <?php if ($message): ?>
+                    <div class="alert alert-info" role="alert">
+                        <?= htmlspecialchars($message) ?>
+                    </div>
+                <?php endif; ?>
+
+                <div class="card">
+                    <div class="card-body">
+                        <h5 class="card-title">Kurs Wymiany Walut</h5>
+                        <p class="card-text">Ustaw kurs wymiany PLN na EUR. Ten kurs będzie używany do wyświetlania cen w EUR dla klientów używających angielskiej wersji strony.</p>
+                        
+                        <form method="POST" action="settings.php">
+                            <div class="mb-3">
+                                <label for="pln_to_eur_rate" class="form-label">Kurs PLN → EUR (EUR = PLN * kurs)</label>
+                                <input type="number" step="0.0001" class="form-control" id="pln_to_eur_rate" name="pln_to_eur_rate" value="<?= htmlspecialchars($rate) ?>" required>
+                            </div>
+                            <button type="submit" class="btn btn-primary">Zapisz</button>
+                        </form>
+                    </div>
+                </div>
+
+            </main>
+        </div>
+    </div>
+    <?php require_once __DIR__ . '/../includes/footer.php'; ?>
+</body>
+</html>
diff --git a/cart.php b/cart.php
index fb5db7c..d21c856 100644
--- a/cart.php
+++ b/cart.php
@@ -1,5 +1,6 @@
 <?php
 require_once __DIR__ . '/includes/header.php';
+require_once __DIR__ . '/includes/currency.php';
 require_once __DIR__ . '/includes/html_head.php';
 require_login();
 
@@ -75,8 +76,8 @@ $user_role = get_user_role();
                     <?php foreach ($cart_products as $item): ?>
                         <tr>
                             <td><?= htmlspecialchars($item['name']) ?></td>
-                            <td><?= number_format($item['price_net'], 2, ',', ' ') ?> zł</td>
-                            <td><?= number_format($item['price_gross'], 2, ',', ' ') ?> zł</td>
+                            <td><?= format_money($item['price_net'], $_SESSION['lang'], $pdo) ?></td>
+                            <td><?= format_money($item['price_gross'], $_SESSION['lang'], $pdo) ?></td>
                             <td>
                                 <form action="cart_actions.php" method="POST" class="d-inline-flex align-items-center">
                                     <input type="hidden" name="action" value="update">
@@ -87,7 +88,7 @@ $user_role = get_user_role();
                                     <button type="submit" class="btn btn-secondary ms-2"><?= t('update_button') ?></button>
                                 </form>
                             </td>
-                            <td><?= number_format($item['line_total'], 2, ',', ' ') ?> zł</td>
+                            <td><?= format_money($item['line_total'], $_SESSION['lang'], $pdo) ?></td>
                             <td>
                                 <form action="cart_actions.php" method="POST" class="d-inline">
                                     <input type="hidden" name="action" value="remove">
@@ -102,7 +103,7 @@ $user_role = get_user_role();
                 <tfoot>
                     <tr>
                         <td colspan="4" class="text-end"><strong><?= t('total_gross_label') ?></strong></td>
-                        <td colspan="2"><strong><?= number_format($total_price, 2, ',', ' ') ?> zł</strong></td>
+                        <td colspan="2"><strong><?= format_money($total_price, $_SESSION['lang'], $pdo) ?></strong></td>
                     </tr>
                 </tfoot>
             </table>
diff --git a/checkout.php b/checkout.php
index 82c775f..d1e29c4 100644
--- a/checkout.php
+++ b/checkout.php
@@ -69,6 +69,7 @@ $page_title = t('checkout_title');
 
 require_once __DIR__ . '/includes/html_head.php';
 require_once __DIR__ . '/includes/header.php';
+require_once __DIR__ . '/includes/currency.php';
 ?>
 
 <main class="container my-5">
@@ -94,16 +95,16 @@ require_once __DIR__ . '/includes/header.php';
                                 <tr>
                                     <td><?= htmlspecialchars($item['name']) ?></td>
                                     <td><?= $item['quantity'] ?></td>
-                                    <td><?= number_format($item['price_net'], 2, ',', ' ') ?> zł</td>
-                                    <td><?= number_format($item['price_gross'], 2, ',', ' ') ?> zł</td>
-                                    <td><?= number_format($item['line_total'], 2, ',', ' ') ?> zł</td>
+                                    <td><?= format_money($item['price_net'], $_SESSION['lang'], $pdo) ?></td>
+                                    <td><?= format_money($item['price_gross'], $_SESSION['lang'], $pdo) ?></td>
+                                    <td><?= format_money($item['line_total'], $_SESSION['lang'], $pdo) ?></td>
                                 </tr>
                             <?php endforeach; ?>
                         </tbody>
                         <tfoot>
                             <tr>
                                 <td colspan="4" class="text-end"><strong><?= t('total_gross') ?>:</strong></td>
-                                <td><strong><?= number_format($total_price, 2, ',', ' ') ?> zł</strong></td>
+                                <td><strong><?= format_money($total_price, $_SESSION['lang'], $pdo) ?></strong></td>
                             </tr>
                         </tfoot>
                     </table>
@@ -119,7 +120,7 @@ require_once __DIR__ . '/includes/header.php';
                     </div>
                     <?php if ($credit_info && $credit_info['credit_enabled']): ?>
                     <div class="alert alert-info">
-                        <?= t('available_trade_credit') ?>: <strong><?= number_format($credit_info['credit_balance'], 2, ',', ' ') ?> zł</strong>
+                        <?= t('available_trade_credit') ?>: <strong><?= format_money($credit_info['credit_balance'], $_SESSION['lang'], $pdo) ?></strong>
                     </div>
                     <?php endif; ?>
                     <form action="order_process.php" method="POST">
diff --git a/db/migrations/027_create_settings_table.sql b/db/migrations/027_create_settings_table.sql
new file mode 100644
index 0000000..4679168
--- /dev/null
+++ b/db/migrations/027_create_settings_table.sql
@@ -0,0 +1,8 @@
+CREATE TABLE IF NOT EXISTS `settings` (
+    `key` VARCHAR(64) PRIMARY KEY,
+    `value` VARCHAR(255) NOT NULL
+);
+
+INSERT INTO `settings` (`key`, `value`)
+SELECT 'pln_to_eur_rate', '0.23'
+WHERE NOT EXISTS (SELECT 1 FROM `settings` WHERE `key` = 'pln_to_eur_rate');
diff --git a/includes/auth.php b/includes/auth.php
index 77b1019..6856bc3 100644
--- a/includes/auth.php
+++ b/includes/auth.php
@@ -54,3 +54,7 @@ function require_role($role) {
         }
     }
 }
+
+function require_admin() {
+    require_role('admin');
+}
diff --git a/includes/currency.php b/includes/currency.php
new file mode 100644
index 0000000..fc6b50a
--- /dev/null
+++ b/includes/currency.php
@@ -0,0 +1,65 @@
+<?php
+
+/**
+ * Fetches the PLN to EUR conversion rate from the database.
+ *
+ * @param PDO $db The database connection object.
+ * @return float The conversion rate. Defaults to 0.23 if not set or invalid.
+ */
+function get_pln_to_eur_rate(PDO $db): float {
+    static $rate = null;
+
+    if ($rate === null) {
+        try {
+            $stmt = $db->prepare("SELECT value FROM settings WHERE `key` = 'pln_to_eur_rate'");
+            $stmt->execute();
+            $result = $stmt->fetch(PDO::FETCH_ASSOC);
+
+            if ($result && is_numeric($result['value']) && $result['value'] > 0) {
+                $rate = (float)$result['value'];
+            } else {
+                $rate = 0.23; // Fallback default
+            }
+        } catch (PDOException $e) {
+            // Log error if possible, for now just use fallback
+            error_log('Could not fetch PLN to EUR rate: ' . $e->getMessage());
+            $rate = 0.23;
+        }
+    }
+
+    return $rate;
+}
+
+/**
+ * Converts a PLN amount to EUR.
+ *
+ * @param float $pln The amount in PLN.
+ * @param float $rate The PLN to EUR conversion rate.
+ * @return float The amount in EUR, rounded to 2 decimal places.
+ */
+function to_eur(float $pln, float $rate): float {
+    return round($pln * $rate, 2);
+}
+
+/**
+ * Formats a money amount based on the language and converts to EUR if necessary.
+ *
+ * @param float|null $amountPLN The amount in PLN. Can be null.
+ * @param string $lang The current language code ('en', 'pl', etc.).
+ * @param PDO $db The database connection object.
+ * @return string The formatted money string. Returns an empty string or placeholder if amount is null.
+ */
+function format_money(?float $amountPLN, string $lang, PDO $db): string {
+    if ($amountPLN === null) {
+        return '-'; // Or some other placeholder for null values
+    }
+
+    if ($lang === 'en') {
+        $rate = get_pln_to_eur_rate($db);
+        $eur = to_eur($amountPLN, $rate);
+        return '€' . number_format($eur, 2, '.', ',');
+    } else {
+        // Default to Polish PLN format
+        return number_format($amountPLN, 2, ',', ' ') . ' zł';
+    }
+}
diff --git a/includes/i18n.php b/includes/i18n.php
index 68b12a6..2f77126 100644
--- a/includes/i18n.php
+++ b/includes/i18n.php
@@ -76,6 +76,7 @@ $translations = [
         'payment_bank_transfer' => 'Przelew tradycyjny',
         'payment_online' => 'Płatność online (Przelewy24)',
         'payment_credit' => 'Kredyt kupiecki',
+        'payment_trade_credit' => 'Kredyt kupiecki (faktura z odroczonym terminem płatności)',
         'order_confirmation_thank_you' => 'Dziękujemy za złożenie zamówienia.',
         'order_confirmation_order_number' => 'Numer Twojego zamówienia to',
         'order_confirmation_track_status' => 'Możesz śledzić jego status w panelu',
@@ -172,6 +173,8 @@ $translations = [
         'szt' => 'sztuka',
         'mb' => 'metr bieżący',
         'm2' => 'metr kwadratowy',
+        'login_email' => 'Adres e-mail',
+        'login_password' => 'Hasło',
     ],
     'en' => [
         'login_header' => 'Login',
@@ -245,6 +248,7 @@ $translations = [
         'payment_bank_transfer' => 'Bank transfer',
         'payment_online' => 'Online payment (Przelewy24)',
         'payment_credit' => 'Trade credit',
+        'payment_trade_credit' => 'Trade credit (invoice with deferred payment)',
         'order_confirmation_thank_you' => 'Thank you for your order.',
         'order_confirmation_order_number' => 'Your order number is',
         'order_confirmation_track_status' => 'You can track its status in the',
@@ -341,6 +345,8 @@ $translations = [
         'szt' => 'piece',
         'mb' => 'linear meter',
         'm2' => 'square meter',
+        'login_email' => 'Email',
+        'login_password' => 'Password',
     ],
 ];
 
diff --git a/index.php b/index.php
index 68a7085..ed86c89 100644
--- a/index.php
+++ b/index.php
@@ -1,5 +1,6 @@
 <?php
 require_once __DIR__ . '/includes/init.php';
+require_once __DIR__ . '/includes/currency.php';
 require_once __DIR__ . '/includes/html_head.php';
 require_once __DIR__ . '/includes/header.php';
 $page_title = t('catalog_title');
@@ -76,8 +77,8 @@ try {
                                 echo htmlspecialchars(strlen($desc) > 100 ? substr($desc, 0, 100) . '...' : $desc);
                             ?></p>
                             <div class="mt-auto">
-                                <p class="card-text text-muted small mb-0"><?= htmlspecialchars(number_format($prices['net'], 2, ',', ' ')) ?> zł <?= t('net') ?></p>
-                                <p class="card-text fw-bold fs-5"><?= htmlspecialchars(number_format($prices['gross'], 2, ',', ' ')) ?> zł <?= t('gross') ?></p>
+                                <p class="card-text text-muted small mb-0"><?= format_money($prices['net'], $_SESSION['lang'], $pdo) ?> <?= t('net') ?></p>
+                                <p class="card-text fw-bold fs-5"><?= format_money($prices['gross'], $_SESSION['lang'], $pdo) ?> <?= t('gross') ?></p>
                             </div>
                         </div>
                         <div class="card-footer bg-white border-top-0 pb-3">
@@ -120,8 +121,8 @@ try {
                                     </a>
                                 </h6>
                                 <div class="mt-auto">
-                                    <p class="card-text text-muted small mb-0"><?= htmlspecialchars(number_format($prices['net'], 2, ',', ' ')) ?> zł <?= t('net') ?></p>
-                                    <p class="card-text fw-bold"><?= htmlspecialchars(number_format($prices['gross'], 2, ',', ' ')) ?> zł <?= t('gross') ?></p>
+                                    <p class="card-text text-muted small mb-0"><?= format_money($prices['net'], $_SESSION['lang'], $pdo) ?> <?= t('net') ?></p>
+                                    <p class="card-text fw-bold"><?= format_money($prices['gross'], $_SESSION['lang'], $pdo) ?> <?= t('gross') ?></p>
                                 </div>
                             </div>
                             <div class="card-footer bg-white border-top-0 pb-3">
diff --git a/order_details.php b/order_details.php
index f9f7242..4e004de 100644
--- a/order_details.php
+++ b/order_details.php
@@ -63,6 +63,7 @@ $page_title = $order ? str_replace('{order_id}', $order['id'], t('order_details_
 
 require_once __DIR__ . '/includes/html_head.php';
 require_once __DIR__ . '/includes/header.php';
+require_once __DIR__ . '/includes/currency.php';
 ?>
 
 <main class="container my-5">
@@ -80,7 +81,7 @@ require_once __DIR__ . '/includes/header.php';
                 <p><strong><?= t('order_date') ?>:</strong> <?= date('d.m.Y H:i', strtotime($order['created_at'])) ?></p>
                 <p><strong><?= t('status') ?>:</strong> <span class="badge bg-info"><?= htmlspecialchars(t_status($order['status'])) ?></span></p>
                 <p><strong><?= t('payment_method') ?>:</strong> <?= htmlspecialchars(t_status($order['payment_method'])) ?></p>
-                <p><strong><?= t('total_gross') ?>:</strong> <?= number_format($order['total_amount'], 2, ',', ' ') ?> zł</p>
+                <p><strong><?= t('total_gross') ?>:</strong> <?= format_money($order['total_amount'], $_SESSION['lang'], $pdo) ?></p>
                 <p><strong><?= t('notes') ?>:</strong> <?= nl2br(htmlspecialchars($order['notes'])) ?></p>
             </div>
         </div>
@@ -110,10 +111,10 @@ require_once __DIR__ . '/includes/header.php';
                             <tr>
                                 <td><img src="<?= htmlspecialchars($image_url) ?>" alt="<?= htmlspecialchars($item['product_name']) ?>" style="width: 50px; height: 50px; object-fit: cover;"></td>
                                 <td><?= htmlspecialchars($item['product_name']) ?></td>
-                                <td><?= number_format($unit_price_net, 2, ',', ' ') ?> zł</td>
-                                <td><?= number_format($unit_price_gross, 2, ',', ' ') ?> zł</td>
+                                <td><?= format_money($unit_price_net, $_SESSION['lang'], $pdo) ?></td>
+                                <td><?= format_money($unit_price_gross, $_SESSION['lang'], $pdo) ?></td>
                                 <td><?= $item['quantity'] ?></td>
-                                <td><?= number_format($item['line_total'], 2, ',', ' ') ?> zł</td>
+                                <td><?= format_money($item['line_total'], $_SESSION['lang'], $pdo) ?></td>
                             </tr>
                         <?php endforeach; ?>
                     </tbody>
diff --git a/orders.php b/orders.php
index dc20a51..bb2d529 100644
--- a/orders.php
+++ b/orders.php
@@ -23,6 +23,7 @@ if (!isset($_SESSION['client_id'])) {
 $page_title = t('title_orders');
 
 require_once 'includes/header.php';
+require_once 'includes/currency.php';
 require_once 'includes/html_head.php';
 ?>
 
@@ -55,7 +56,7 @@ require_once 'includes/html_head.php';
                             <td>#<?= $order['id']; ?></td>
                             <td><?= date('d.m.Y H:i', strtotime($order['created_at'])); ?></td>
                             <td><span class="badge bg-info"><?= htmlspecialchars(t_status($order['status'])); ?></span></td>
-                            <td><?= number_format($order['total_amount'], 2, ',', ' '); ?> zł</td>
+                            <td><?= format_money($order['total_amount'], $_SESSION['lang'], $pdo) ?></td>
                             <td>
                                 <a href="order_details.php?id=<?= $order['id']; ?>" class="btn btn-sm btn-outline-primary">
                                     <i class="bi bi-eye"></i> <?= t('btn_view_details') ?>
diff --git a/product.php b/product.php
index 5927140..b4184e7 100644
--- a/product.php
+++ b/product.php
@@ -8,6 +8,7 @@ require_once 'includes/helpers.php';
 
 // This line is now required at the top of pages that use the header.
 require_once 'includes/i18n.php';
+require_once 'includes/currency.php';
 
 $product_id = $_GET['id'] ?? null;
 
@@ -91,8 +92,8 @@ $page_title = htmlspecialchars($product['name']);
                 <h1 class="mb-3"><?= htmlspecialchars($product['name']) ?></h1>
                 
                 <div class="bg-light p-4 rounded mb-4">
-                    <p class="h4 fw-bold mb-1"><?= htmlspecialchars(number_format($prices['gross'], 2, ',', ' ')) ?> zł <span class="fs-6 fw-normal"><?= t('gross') ?></span></p>
-                    <p class="text-muted mb-0"><?= htmlspecialchars(number_format($prices['net'], 2, ',', ' ')) ?> zł <span class="fs-6 fw-normal"><?= t('net') ?></span></p>
+                    <p class="h4 fw-bold mb-1"><?= format_money($prices['gross'], $_SESSION['lang'], $pdo) ?> <span class="fs-6 fw-normal"><?= t('gross') ?></span></p>
+                    <p class="text-muted mb-0"><?= format_money($prices['net'], $_SESSION['lang'], $pdo) ?> <span class="fs-6 fw-normal"><?= t('net') ?></span></p>
                     <hr class="my-2">
                     <small class="text-muted"><?= t('price_per') ?>: <?= t(htmlspecialchars($product['unit'])) ?></small>
                 </div>
diff --git a/related_suggestions.php b/related_suggestions.php
index 17af898..de53a57 100644
--- a/related_suggestions.php
+++ b/related_suggestions.php
@@ -1,5 +1,6 @@
 <?php
 require_once __DIR__ . '/includes/header.php';
+require_once __DIR__ . '/includes/currency.php';
 require_once __DIR__ . '/includes/html_head.php';
 require_login();
 
@@ -71,8 +72,8 @@ $user_role = get_user_role();
                 <div class="col-md-5">
                     <div class="d-flex justify-content-end align-items-center">
                         <div class="text-end">
-                            <p class="mb-0 h5"><strong><?= number_format($added_product_price['gross'], 2, ',', ' '); ?> zł</strong> <small><?= t('gross'); ?></small></p>
-                            <p class="mb-0 text-muted"><?= number_format($added_product_price['net'], 2, ',', ' '); ?> zł <small><?= t('net'); ?></small></p>
+                            <p class="mb-0 h5"><strong><?= format_money($added_product_price['gross'], $_SESSION['lang'], $db) ?></strong> <small><?= t('gross'); ?></small></p>
+                            <p class="mb-0 text-muted"><?= format_money($added_product_price['net'], $_SESSION['lang'], $db) ?> <small><?= t('net'); ?></small></p>
                         </div>
                     </div>
                 </div>
@@ -106,8 +107,8 @@ $user_role = get_user_role();
                         </div>
                         <div class="col-md-3">
                             <div class="text-end">
-                                <p class="mb-0 h5"><strong><?= number_format($effective_price['gross'], 2, ',', ' '); ?> zł</strong> <small><?= t('gross'); ?></small></p>
-                                <p class="mb-0 text-muted"><?= number_format($effective_price['net'], 2, ',', ' '); ?> zł <small><?= t('net'); ?></small></p>
+                                <p class="mb-0 h5"><strong><?= format_money($effective_price['gross'], $_SESSION['lang'], $db) ?></strong> <small><?= t('gross'); ?></small></p>
+                                <p class="mb-0 text-muted"><?= format_money($effective_price['net'], $_SESSION['lang'], $db) ?> <small><?= t('net'); ?></small></p>
                             </div>
                         </div>
                         <div class="col-md-3">
