ep 4

pom.xml

@@ -26,6 +26,10 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-mail</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-data-jpa</artifactId>

src/main/java/com/iamnbty/training/backend/BackendApplication.java

@@ -2,8 +2,10 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
 @SpringBootApplication
+@EnableScheduling
 public class BackendApplication {
 
     public static void main(String[] args) {

src/main/java/com/iamnbty/training/backend/business/EmailBusiness.java

@@ -0,0 +1,48 @@
+package com.iamnbty.training.backend.business;
+
+import com.iamnbty.training.backend.exception.BaseException;
+import com.iamnbty.training.backend.exception.EmailException;
+import com.iamnbty.training.backend.service.EmailService;
+import org.springframework.stereotype.Service;
+import org.springframework.util.FileCopyUtils;
+import org.springframework.util.ResourceUtils;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
+@Service
+public class EmailBusiness {
+
+    private final EmailService emailService;
+
+    public EmailBusiness(EmailService emailService) {
+        this.emailService = emailService;
+    }
+
+    public void sendActivateUserEmail(String email, String name, String token) throws BaseException {
+        // prepare content (HTML)
+        String html;
+        try {
+            html = readEmailTemplate("email-activate-user.html");
+        } catch (IOException e) {
+            throw EmailException.templateNotFound();
+        }
+
+        String finalLink = "http://localhost:4200/activate/" + token;
+        html = html.replace("${P_NAME}", name);
+        html = html.replace("${LINK}", finalLink);
+
+        // prepare subject
+        String subject = "Please activate your account";
+
+
+        emailService.send(email, subject, html);
+    }
+
+    private String readEmailTemplate(String filename) throws IOException {
+        File file = ResourceUtils.getFile("classpath:email/" + filename);
+        return FileCopyUtils.copyToString(new FileReader(file));
+    }
+
+}

src/main/java/com/iamnbty/training/backend/config/SecurityConfig.java

@@ -36,7 +36,7 @@ protected void configure(AuthenticationManagerBuilder auth) throws Exception {
     protected void configure(HttpSecurity http) throws Exception {
         http.cors().disable().csrf().disable()
                 .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
-                .and().authorizeRequests().antMatchers("/user/register", "/user/login").anonymous()
+                .and().authorizeRequests().antMatchers("/actuator/**", "/user/register", "/user/login").anonymous()
                 .anyRequest().authenticated()
                 .and().apply(new TokenFilterConfiguerer(tokenService));
     }

src/main/java/com/iamnbty/training/backend/exception/EmailException.java

@@ -0,0 +1,13 @@
+package com.iamnbty.training.backend.exception;
+
+public class EmailException extends BaseException {
+
+    public EmailException(String code) {
+        super("email." + code);
+    }
+
+    public static EmailException templateNotFound() {
+        return new EmailException("template.not.found");
+    }
+
+}

src/main/java/com/iamnbty/training/backend/schedule/UserSchedule.java

@@ -0,0 +1,50 @@
+package com.iamnbty.training.backend.schedule;
+
+import com.iamnbty.training.backend.service.UserService;
+import lombok.extern.log4j.Log4j2;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Service;
+
+@Service
+@Log4j2
+public class UserSchedule {
+
+    private final UserService userService;
+
+    public UserSchedule(UserService userService) {
+        this.userService = userService;
+    }
+
+    // Schedule Note
+    // 1 => second
+    // 2 => minute
+    // 3 => hour
+    // 4 => day
+    // 5 => month
+    // 6 => year
+
+    /**
+     * Every minute (UTC Time)
+     */
+    @Scheduled(cron = "0 * * * * *")
+    public void testEveryMinute() {
+        log.info("Hello, What's up?");
+    }
+
+    /**
+     * Everyday at 00:00 (UTC Time)
+     */
+    @Scheduled(cron = "0 0 0 * * *")
+    public void testEveryMidNight() {
+
+    }
+
+    /**
+     * Everyday at 10:50 AM (Thai Time)
+     */
+    @Scheduled(cron = "0 50 10 * * *", zone = "Asia/Bangkok")
+    public void testEverydayNineAM() {
+        log.info("Hey Hoo!!!");
+    }
+
+}

src/main/java/com/iamnbty/training/backend/service/EmailService.java

@@ -0,0 +1,31 @@
+package com.iamnbty.training.backend.service;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.mail.javamail.MimeMessageHelper;
+import org.springframework.mail.javamail.MimeMessagePreparator;
+import org.springframework.stereotype.Service;
+
+@Service
+public class EmailService {
+
+    private final JavaMailSender mailSender;
+    @Value("${app.email.from}")
+    private String from;
+
+    public EmailService(JavaMailSender mailSender) {
+        this.mailSender = mailSender;
+    }
+
+    public void send(String to, String subject, String html) {
+        MimeMessagePreparator message = mimeMessage -> {
+            MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true, "UTF-8");
+            helper.setFrom(from);
+            helper.setTo(to);
+            helper.setSubject(subject);
+            helper.setText(html, true);
+        };
+        mailSender.send(message);
+    }
+
+}

src/main/resources/application.yaml

@@ -1,4 +1,15 @@
 spring:
+  mail:
+    host: smtp.gmail.com
+    port: 587
+    username: YOUR_USERNAME
+    password: YOUR_PASSWORD
+    properties:
+      mail:
+        smtp:
+          auth: true
+          starttls:
+            enable: true
   jpa:
     hibernate:
       ddl-auto: update
@@ -16,4 +27,6 @@ app:
   token:
     secret: m#MySecretGGWP2021
     issuer: BackendService
+  email:
+    from: [email protected]
 

src/main/resources/email/email-activate-user.html

@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Welcome to Backend</title>
+</head>
+<body>
+
+<h1>Hello, ${P_NAME}</h1>
+<h2>Please activate your account</h2>
+<p>Click <a href="${LINK}">here</a></p>
+
+</body>
+</html>

src/test/java/com/iamnbty/training/backend/TestEmailBusiness.java

@@ -0,0 +1,39 @@
+package com.iamnbty.training.backend;
+
+import com.iamnbty.training.backend.business.EmailBusiness;
+import com.iamnbty.training.backend.exception.BaseException;
+import org.junit.jupiter.api.MethodOrderer;
+import org.junit.jupiter.api.Order;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestMethodOrder;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+@TestMethodOrder(MethodOrderer.OrderAnnotation.class)
+class TestEmailBusiness {
+
+    @Autowired
+    private EmailBusiness emailBusiness;
+
+    @Order(1)
+    @Test
+    void testSendActivateEmail() throws BaseException {
+        emailBusiness.sendActivateUserEmail(
+                TestData.email,
+                TestData.name,
+                TestData.token
+        );
+    }
+
+    interface TestData {
+
+        String email = "[email protected]";
+
+        String name = "Natthapon Pinyo";
+
+        String token = "m#@:LSDIFDISIDFO99020kkddd";
+
+    }
+
+}