First Commit

paypal_checkout_button.php

@@ -0,0 +1,121 @@
+<?php
+/**
+ * PayPal Button Include (themed to match the site's own button style,
+ * e.g. "Print Remittance Form" — a plain btn--primary, not PayPal's own
+ * SDK-rendered widget, which can't be restyled).
+ *
+ * Include this file wherever you want to show the PayPal Checkout button.
+ *
+ * REQUIRED VARIABLES (must be set before including this file):
+ *   - $owing: The amount to charge (float)
+ *   - $trxnum: Your internal transaction/reference number (int)
+ *
+ * OPTIONAL VARIABLES:
+ *   - $paypal_currency: Currency code (default: from config)
+ *   - $paypal_description: Order description
+ *   - $paypal_button_text: Button label (default: 'PayPal/Credit Card')
+ *
+ * USAGE:
+ *   $owing = 25.00;
+ *   $trxnum = 12345;
+ *   include 'button_file.php';
+ *
+ * FLOW: click -> create order -> redirect to PayPal's approve page ->
+ * PayPal redirects back here with ?paypal=success&token=<orderId> ->
+ * this file captures the order server-side and shows the result.
+ * (Redirect-based, not the JS SDK popup/iframe button, so it can be
+ * styled as a plain themed link instead of PayPal's own widget.)
+ */
+
+require_once __DIR__ . '/paypal_checkout_config.php';
+
+if (session_status() === PHP_SESSION_NONE) {
+    session_start();
+}
+
+$paypal_currency = $paypal_currency ?? PAYPAL_CURRENCY;
+$paypal_description = $paypal_description ?? 'Order Payment';
+$paypal_button_text = $paypal_button_text ?? 'PayPal / Credit Card';
+
+$_SESSION['paypal_checkout_amount'] = $owing;
+$_SESSION['paypal_checkout_trxnum'] = $trxnum;
+$_SESSION['paypal_checkout_currency'] = $paypal_currency;
+$_SESSION['paypal_checkout_description'] = $paypal_description;
+
+$containerId = 'pp-btn-' . uniqid();
+
+// -- Handle the return trip from PayPal (redirect-based approval) ----------
+$pppCaptureResult = null;
+if (isset($_GET['paypal']) && $_GET['paypal'] === 'success' && isset($_GET['token'])) {
+    $orderId = $_GET['token'];
+    if (isset($_SESSION['paypal_order_id']) && $_SESSION['paypal_order_id'] === $orderId) {
+        require_once __DIR__ . '/paypal_checkout_api.php';
+        try {
+            $paypalApi = new PayPalCheckoutAPI();
+            $capture = $paypalApi->captureOrder($orderId);
+            if ($capture['status'] === 'COMPLETED') {
+                $pppCaptureResult = ['success' => true];
+            } else {
+                $pppCaptureResult = ['success' => false, 'error' => 'Payment was not completed. Status: ' . $capture['status']];
+            }
+        } catch (Exception $e) {
+            $pppCaptureResult = ['success' => false, 'error' => $e->getMessage()];
+        }
+        unset($_SESSION['paypal_order_id'], $_SESSION['paypal_order_trxnum'], $_SESSION['paypal_order_amount']);
+    }
+} elseif (isset($_GET['paypal']) && $_GET['paypal'] === 'cancel') {
+    $pppCaptureResult = ['success' => false, 'error' => 'Payment was cancelled.'];
+}
+?>
+
+<?php if ($pppCaptureResult): ?>
+<div class="pp-btn-message" style="padding: 10px; margin-bottom: 10px; border-radius: 5px; max-width: 400px; margin-left: auto; margin-right: auto;
+    <?php echo $pppCaptureResult['success']
+        ? 'background:#e8f5e9; color:#2e7d32; border:1px solid #a5d6a7;'
+        : 'background:#ffebee; color:#c62828; border:1px solid #ef9a9a;'; ?>">
+  <?php if ($pppCaptureResult['success']): ?>
+    <strong>Payment Successful!</strong>
+  <?php else: ?>
+    <?php echo htmlspecialchars($pppCaptureResult['error']); ?>
+  <?php endif; ?>
+</div>
+<?php endif; ?>
+
+<div style="max-width: 400px; margin: 0 auto; text-align: center;">
+  <a href="#" id="<?php echo $containerId; ?>" class="btn btn--primary"><?php echo htmlspecialchars($paypal_button_text); ?></a>
+</div>
+
+<script>
+(function() {
+    var btn = document.getElementById('<?php echo $containerId; ?>');
+    btn.addEventListener('click', function(e) {
+        e.preventDefault();
+        btn.style.pointerEvents = 'none';
+        var originalText = btn.textContent;
+        btn.textContent = 'Redirecting to PayPal...';
+
+        fetch('/paypal_checkout_create_order.php', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({
+                amount: <?php echo json_encode($owing); ?>,
+                trxnum: <?php echo json_encode($trxnum); ?>,
+                currency: <?php echo json_encode($paypal_currency); ?>,
+                description: <?php echo json_encode($paypal_description); ?>
+            })
+        })
+        .then(function(response) { return response.json(); })
+        .then(function(orderData) {
+            if (orderData.error || !orderData.approveUrl) {
+                throw new Error(orderData.error || 'Could not start PayPal checkout.');
+            }
+            window.location.href = orderData.approveUrl;
+        })
+        .catch(function(err) {
+            alert('Payment failed: ' + err.message);
+            btn.style.pointerEvents = '';
+            btn.textContent = originalText;
+        });
+    });
+})();
+</script>