[#36] feat: Email 등록 API 생성

src/main/java/com/gongjakso/server/domain/email/controller/EmailController.java

@@ -0,0 +1,29 @@
+package com.gongjakso.server.domain.email.controller;
+
+import com.gongjakso.server.domain.email.dto.request.EmailReq;
+import com.gongjakso.server.domain.email.dto.response.EmailRes;
+import com.gongjakso.server.domain.email.service.EmailService;
+import com.gongjakso.server.global.common.ApplicationResponse;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("api/v1/email")
+@Tag(name = "출시 알림 수신", description = "출시 알림 수신 관련하여, 정보 저장 및 정보 조회에 사용되는 API")
+public class EmailController {
+
+    private final EmailService emailService;
+
+    @Operation(description = "출시 알림 수신 이메일 등록 API")
+    @PostMapping("")
+    public ApplicationResponse<EmailRes> registerEmail(@Valid @RequestBody EmailReq emailReq) {
+        return ApplicationResponse.ok(emailService.registerEmail(emailReq));
+    }
+}

src/main/java/com/gongjakso/server/domain/email/repository/EmailRepository.java

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+package com.gongjakso.server.domain.email.repository;
+
+import com.gongjakso.server.domain.email.entity.Email;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface EmailRepository extends JpaRepository<Email, Long> {
+
+    Boolean existsEmailByAddressAndDeletedAtIsNull(String address);
+}

src/main/java/com/gongjakso/server/domain/email/service/EmailService.java

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+package com.gongjakso.server.domain.email.service;
+
+import com.gongjakso.server.domain.email.dto.request.EmailReq;
+import com.gongjakso.server.domain.email.dto.response.EmailRes;
+import com.gongjakso.server.domain.email.entity.Email;
+import com.gongjakso.server.domain.email.repository.EmailRepository;
+import com.gongjakso.server.global.exception.ApplicationException;
+import com.gongjakso.server.global.exception.ErrorCode;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@Transactional(readOnly = true)
+@RequiredArgsConstructor
+public class EmailService {
+
+    private final EmailRepository emailRepository;
+
+    @Transactional
+    public EmailRes registerEmail(EmailReq emailReq) {
+        // Validation
+        if(emailRepository.existsEmailByAddressAndDeletedAtIsNull(emailReq.address())) {
+            throw new ApplicationException(ErrorCode.ALREADY_EXIST_EXCEPTION);
+        }
+
+        // Business Logic
+        Email email = emailReq.from();
+        Email saveEmail = emailRepository.save(email);
+
+        // Response
+        return EmailRes.of(saveEmail);
+    }
+}