Feat: 메일 전송 구현

build.gradle

@@ -49,6 +49,8 @@ dependencies {
     implementation 'org.springdoc:springdoc-openapi-starter-common:2.1.0'
     implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.1.0'
 
+    // Mail
+    implementation 'org.springframework.boot:spring-boot-starter-mail'
 }
 
 tasks.named('test') {

src/main/java/com/hackathon/momento/global/config/EmailConfig.java

@@ -0,0 +1,50 @@
+package com.hackathon.momento.global.config;
+
+import java.util.Properties;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.mail.javamail.JavaMailSenderImpl;
+
+@Configuration
+public class EmailConfig {
+
+    @Value("${spring.mail.host}")
+    private String host;
+
+    @Value("${spring.mail.port}")
+    private int port;
+
+    @Value("${spring.mail.username}")
+    private String username;
+
+    @Value("${spring.mail.password}")
+    private String password;
+
+    @Bean
+    public JavaMailSender javaMailSender() {
+        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
+        mailSender.setPort(port);
+        mailSender.setHost(host);
+        mailSender.setUsername(username);
+        mailSender.setPassword(password);
+        mailSender.setDefaultEncoding("UTF-8");
+        mailSender.setJavaMailProperties(getMailProperties());
+
+        return mailSender;
+    }
+
+    private Properties getMailProperties() {
+        Properties properties = new Properties();
+        properties.put("mail.smtp.auth", true);
+        properties.put("mail.smtp.starttls.enable", true);
+        properties.put("mail.smtp.starttls.required", true);
+        properties.put("mail.smtp.connectiontimeout", 5000);
+        properties.put("mail.smtp.timeout", 5000);
+        properties.put("mail.smtp.writetimeout", 5000);
+
+        return properties;
+    }
+}
+

src/main/java/com/hackathon/momento/team/application/EmailService.java

@@ -0,0 +1,43 @@
+package com.hackathon.momento.team.application;
+
+import jakarta.mail.MessagingException;
+import jakarta.mail.internet.MimeMessage;
+import java.io.UnsupportedEncodingException;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.mail.javamail.MimeMessageHelper;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Slf4j
+@Service
+@Transactional(readOnly = true)
+@RequiredArgsConstructor
+public class EmailService {
+
+    private static final String FROM_EMAIL = "[email protected]";
+    private static final String TEAM_NAME = "TeamUp";
+
+    private final JavaMailSender mailSender;
+
+    public void sendMessage(String to, String body) {
+        try {
+            MimeMessage message = mailSender.createMimeMessage();
+
+            String subject = "[TeamUp] 요청하신 팀 빌딩이 완료되었습니다, 팀 정보를 확인해주세요.";
+            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(message, true);
+
+            mimeMessageHelper.setTo(to);
+            mimeMessageHelper.setFrom(FROM_EMAIL, TEAM_NAME);
+            mimeMessageHelper.setSubject(subject);
+            mimeMessageHelper.setText(body, true);
+
+            mailSender.send(message);
+            log.info("Email sent to: {}", to);
+
+        } catch (MessagingException | UnsupportedEncodingException e) {
+            log.error("Email send failed to {}", to, e);
+        }
+    }
+}

src/main/java/com/hackathon/momento/team/application/TeamService.java

@@ -35,6 +35,7 @@ public class TeamService {
     private final TeamInfoRepository teamInfoRepository;
     private final MemberRepository memberRepository;
     private final RestTemplate restTemplate;
+    private final EmailService emailService;
 
     @Value("${openai.api.url}")
     private String apiURL;
@@ -77,6 +78,43 @@ public void executeTeamBuilding() {
 
             List<TeamInfo> teamInfos = parseResToTeamInfo(resContent, requests);
             teamInfoRepository.saveAll(teamInfos);
+
+            sendTeamCompletionEmails(teamInfos);
+        }
+    }
+
+    private void sendTeamCompletionEmails(List<TeamInfo> teamInfos) {
+        for (TeamInfo teamInfo : teamInfos) {
+            String teamName = teamInfo.getTeamName();
+            String description = teamInfo.getDescription();
+            List<TeamBuilding> teamMembers = teamInfo.getTeamBuildings();
+
+            StringBuilder emailBody = new StringBuilder();
+            emailBody.append("<div style='font-family: Arial, sans-serif; max-width: 600px; margin: auto;'>")
+                    .append("<h1 style='background-color: #4CAF50; color: white; padding: 10px; text-align: center;'>")
+                    .append(teamName).append("</h1>")
+                    .append("<p style='font-size: 16px; line-height: 1.5;'>").append(description).append("</p>")
+                    .append("<h2 style='color: #333; margin-top: 20px;'>Team Members</h2>")
+                    .append("<ul style='list-style-type: none; padding: 0;'>");
+
+            for (TeamBuilding memberBuilding : teamMembers) {
+                Member member = memberBuilding.getMember();
+                emailBody.append(
+                                "<li style='background-color: #f9f9f9; margin: 5px 0; padding: 10px; border-radius: 5px;'>")
+                        .append("<strong>Name:</strong> ").append(member.getName()).append("<br>")
+                        .append("<strong>Email:</strong> ").append(member.getEmail()).append("<br>")
+                        .append("<strong>Position:</strong> ").append(memberBuilding.getMyPosition())
+                        .append("</li>");
+            }
+            emailBody.append("</ul>")
+                    .append("<p style='text-align: center; margin-top: 30px;'>")
+                    .append("Thank you for using <strong>TeamUp</strong>")
+                    .append("</p>")
+                    .append("</div>");
+
+            for (TeamBuilding memberBuilding : teamMembers) {
+                emailService.sendMessage(memberBuilding.getMember().getEmail(), emailBody.toString());
+            }
         }
     }
 

src/main/resources/application.yml

@@ -22,6 +22,12 @@ spring:
       port: ${REDIS_PORT}
       host: ${REDIS_SERVER}
 
+  mail:
+    port: ${MAIL_PORT}
+    host: ${MAIL_SERVER}
+    username: ${MAIL_USERNAME}
+    password: ${MAIL_PASSWORD}
+
 logging:
   level:
     org.hibernate.sql: debug