From 7fbe1c375367494635ccbc3dff1e1619e1189fd8 Mon Sep 17 00:00:00 2001
From: csimonis <c.simonis@neusta.de>
Date: Wed, 14 May 2025 09:22:15 +0200
Subject: [PATCH] feat(email): add deposit confirmation email template and
 logic

---
 .../casino/deposit/TransactionService.java    |  10 +-
 .../casino/deposit/WebhookController.java     |   4 +-
 .../casino/security/service/EmailService.java |  22 ++-
 .../java/de/szut/casino/user/UserEntity.java  |   4 +
 .../resources/templates/email/deposit.html    | 136 ++++++++++++++++++
 5 files changed, 172 insertions(+), 4 deletions(-)
 create mode 100644 backend/src/main/resources/templates/email/deposit.html

diff --git a/backend/src/main/java/de/szut/casino/deposit/TransactionService.java b/backend/src/main/java/de/szut/casino/deposit/TransactionService.java
index fceb27b..26f2e25 100644
--- a/backend/src/main/java/de/szut/casino/deposit/TransactionService.java
+++ b/backend/src/main/java/de/szut/casino/deposit/TransactionService.java
@@ -3,10 +3,13 @@ package de.szut.casino.deposit;
 import com.stripe.exception.StripeException;
 import com.stripe.model.checkout.Session;
 import com.stripe.param.checkout.SessionRetrieveParams;
+import de.szut.casino.security.service.EmailService;
 import de.szut.casino.user.UserEntity;
 import de.szut.casino.user.UserRepository;
+import jakarta.mail.MessagingException;
 import org.springframework.stereotype.Service;
 
+import java.io.IOException;
 import java.math.BigDecimal;
 import java.util.Optional;
 
@@ -14,10 +17,12 @@ import java.util.Optional;
 public class TransactionService {
     private final TransactionRepository transactionRepository;
     private final UserRepository userRepository;
+    private final EmailService emailService;
 
-    public TransactionService(TransactionRepository transactionRepository, UserRepository userRepository) {
+    public TransactionService(TransactionRepository transactionRepository, UserRepository userRepository, EmailService emailService) {
         this.transactionRepository = transactionRepository;
         this.userRepository = userRepository;
+        this.emailService = emailService;
     }
 
     public void createTransaction(
@@ -34,7 +39,7 @@ public class TransactionService {
         transactionRepository.save(transaction);
     }
 
-    public void fulfillCheckout(String sessionID) throws StripeException {
+    public void fulfillCheckout(String sessionID) throws StripeException, MessagingException, IOException {
         SessionRetrieveParams params = SessionRetrieveParams.builder()
                 .addExpand("line_items")
                 .build();
@@ -60,5 +65,6 @@ public class TransactionService {
 
         userRepository.save(user);
         transactionRepository.save(transaction);
+        emailService.sendDepositEmail(transaction);
     }
 }
diff --git a/backend/src/main/java/de/szut/casino/deposit/WebhookController.java b/backend/src/main/java/de/szut/casino/deposit/WebhookController.java
index dba9041..45ba4c1 100644
--- a/backend/src/main/java/de/szut/casino/deposit/WebhookController.java
+++ b/backend/src/main/java/de/szut/casino/deposit/WebhookController.java
@@ -6,6 +6,7 @@ import com.stripe.model.Event;
 import com.stripe.model.checkout.Session;
 import com.stripe.net.Webhook;
 import jakarta.annotation.PostConstruct;
+import jakarta.mail.MessagingException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Value;
@@ -15,6 +16,7 @@ import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestHeader;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.io.IOException;
 import java.util.Objects;
 
 @RestController
@@ -38,7 +40,7 @@ public class WebhookController {
     }
 
     @PostMapping("/webhook")
-    public ResponseEntity<String> webhook(@RequestBody String payload, @RequestHeader("Stripe-Signature") String sigHeader) throws StripeException {
+    public ResponseEntity<String> webhook(@RequestBody String payload, @RequestHeader("Stripe-Signature") String sigHeader) throws StripeException, MessagingException, IOException {
         Event event = Webhook.constructEvent(payload, sigHeader, webhookSecret);
 
         if (Objects.equals(event.getType(), "checkout.session.completed") || Objects.equals(event.getType(), "checkout.session.async_payment_succeeded")) {
diff --git a/backend/src/main/java/de/szut/casino/security/service/EmailService.java b/backend/src/main/java/de/szut/casino/security/service/EmailService.java
index fb875b8..861a0c2 100644
--- a/backend/src/main/java/de/szut/casino/security/service/EmailService.java
+++ b/backend/src/main/java/de/szut/casino/security/service/EmailService.java
@@ -1,5 +1,6 @@
 package de.szut.casino.security.service;
 
+import de.szut.casino.deposit.TransactionEntity;
 import de.szut.casino.user.UserEntity;
 import jakarta.mail.MessagingException;
 import jakarta.mail.internet.MimeMessage;
@@ -14,6 +15,7 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.nio.charset.StandardCharsets;
+import java.util.List;
 
 @Service
 public class EmailService {
@@ -43,13 +45,31 @@ public class EmailService {
         MimeMessageHelper helper = new MimeMessageHelper(message, true, "UTF-8");
 
         helper.setFrom(mailConfig.fromAddress);
-        helper.setTo(user.getEmail());
+        helper.setTo(user.getEmailAddress());
         helper.setSubject("Willkommen bei Trustworthy Casino©");
         helper.setText(htmlContent, true);
 
         mailSender.send(message);
     }
 
+    public void sendDepositEmail(TransactionEntity transaction) throws IOException, MessagingException {
+        String template = loadTemplate("email/deposit.html");
+        String htmlContent = template
+                .replace("${username}", transaction.getUser().getUsername())
+                .replace("${amount}", String.valueOf(transaction.getAmount()))
+                .replace("${feUrl}", feUrl);
+
+        MimeMessage message = mailSender.createMimeMessage();
+        MimeMessageHelper helper = new MimeMessageHelper(message, true, "UTF-8");
+
+        helper.setFrom(mailConfig.fromAddress);
+        helper.setTo(transaction.getUser().getEmailAddress());
+        helper.setSubject("Einzahlung über ${amount}€ Erfolgreich".replace("${amount}", String.valueOf(transaction.getAmount())));
+        helper.setText(htmlContent, true);
+
+        mailSender.send(message);
+    }
+
     private String loadTemplate(String templatePath) throws IOException {
         ClassPathResource resource = new ClassPathResource("templates/" + templatePath);
         try (Reader reader = new InputStreamReader(resource.getInputStream(), StandardCharsets.UTF_8)) {
diff --git a/backend/src/main/java/de/szut/casino/user/UserEntity.java b/backend/src/main/java/de/szut/casino/user/UserEntity.java
index 913e69d..270d178 100644
--- a/backend/src/main/java/de/szut/casino/user/UserEntity.java
+++ b/backend/src/main/java/de/szut/casino/user/UserEntity.java
@@ -64,4 +64,8 @@ public class UserEntity {
 
         this.balance = this.balance.subtract(amountToSubtract);
     }
+
+    public String getEmailAddress() {
+        return "${name} <${email}>".replace("${name}", this.username).replace("${email}", this.email);
+    }
 }
diff --git a/backend/src/main/resources/templates/email/deposit.html b/backend/src/main/resources/templates/email/deposit.html
new file mode 100644
index 0000000..632d7ab
--- /dev/null
+++ b/backend/src/main/resources/templates/email/deposit.html
@@ -0,0 +1,136 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Einzahlung bestätigt - Trustworthy Casino©</title>
+    <style>
+        body {
+            font-family: 'Arial', sans-serif;
+            line-height: 1.6;
+            background-color: #f8fafc;
+            color: #64748b;
+            max-width: 600px;
+            margin: 0 auto;
+            padding: 20px;
+        }
+        .container {
+            background-color: #0a1219;
+            border-radius: 8px;
+            overflow: hidden;
+            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
+        }
+        .header {
+            background-color: #1a2835;
+            padding: 20px;
+            text-align: center;
+        }
+        .header h1 {
+            color: #ffffff;
+            margin: 0;
+            font-size: 28px;
+        }
+        .content {
+            background-color: #121e27;
+            padding: 30px;
+            color: #ffffff;
+        }
+        .footer {
+            background-color: #1a2835;
+            color: #94a3b8;
+            padding: 20px;
+            text-align: center;
+            font-size: 0.8em;
+        }
+        .button {
+            display: inline-block;
+            background-color: #10b981;
+            color: #ffffff;
+            padding: 12px 24px;
+            margin: 20px 0;
+            text-decoration: none;
+            border-radius: 6px;
+            font-weight: bold;
+            text-align: center;
+            transition: background-color 0.3s;
+        }
+        .button:hover {
+            background-color: #059669;
+        }
+        h2 {
+            color: #ffffff;
+            padding-bottom: 10px;
+            display: inline-block;
+        }
+        ul {
+            padding-left: 20px;
+            margin: 20px 0;
+        }
+        li {
+            margin-bottom: 8px;
+            color: #94a3b8;
+        }
+        li::marker {
+            color: #34d399;
+        }
+        .highlight {
+            color: #10b981;
+            font-weight: bold;
+        }
+        .divider {
+            height: 1px;
+            background-color: #1a2835;
+            margin: 20px 0;
+        }
+        p {
+            margin: 16px 0;
+        }
+        .amount-box {
+            background-color: #1a2835;
+            border-radius: 6px;
+            padding: 15px;
+            text-align: center;
+            margin: 20px 0;
+        }
+        .amount-value {
+            font-size: 28px;
+            font-weight: bold;
+            color: #10b981;
+        }
+    </style>
+</head>
+<body>
+<div class="container">
+    <div class="header">
+        <h1>Trustworthy Casino</h1>
+    </div>
+    <div class="content">
+        <h2>Hallo <span class="highlight">${username}</span>,</h2>
+
+        <p>vielen Dank für Ihre Einzahlung bei Trustworthy Casino. Wir bestätigen den Eingang Ihres Guthabens.</p>
+
+        <div class="amount-box">
+            <p>Eingezahlter Betrag</p>
+            <div class="amount-value">${amount}€</div>
+        </div>
+
+        <div class="divider"></div>
+
+        <p>Ihr Guthaben wurde Ihrem Konto sofort gutgeschrieben und steht ab sofort zum Spielen zur Verfügung.</p>
+
+        <div style="text-align: center;">
+            <a href="${feUrl}/games" class="button">Jetzt Spielen</a>
+        </div>
+
+        <p>Bei Fragen zu Ihrer Einzahlung kontaktieren Sie bitte unseren Kundenservice.</p>
+
+        <p>Mit freundlichen Grüßen,<br>
+            Ihr <span style="color: #10b981;">Trustworthy Casino</span> Team</p>
+    </div>
+    <div class="footer">
+        <p>2025 Trustworthy Casino - Alle Rechte vorbehalten</p>
+        <p>Diese E-Mail wurde automatisch generiert. Bitte antworten Sie nicht darauf.</p>
+    </div>
+</div>
+</body>
+</html>
\ No newline at end of file