feat: 지원자 상세 조회 로직 구현

Author: ysw789

src/main/java/dmu/dasom/api/domain/applicant/service/ApplicantService.java

@@ -1,6 +1,7 @@
 package dmu.dasom.api.domain.applicant.service;
 
 import dmu.dasom.api.domain.applicant.dto.ApplicantCreateRequestDto;
+import dmu.dasom.api.domain.applicant.dto.ApplicantDetailsResponseDto;
 import dmu.dasom.api.domain.applicant.dto.ApplicantResponseDto;
 import dmu.dasom.api.global.dto.PageResponse;
 
@@ -10,4 +11,6 @@ public interface ApplicantService {
 
     PageResponse<ApplicantResponseDto> getApplicants(final int page);
 
+    ApplicantDetailsResponseDto getApplicant(final Long id);
+
 }

src/main/java/dmu/dasom/api/domain/applicant/service/ApplicantServiceImpl.java

@@ -1,6 +1,7 @@
 package dmu.dasom.api.domain.applicant.service;
 
 import dmu.dasom.api.domain.applicant.dto.ApplicantCreateRequestDto;
+import dmu.dasom.api.domain.applicant.dto.ApplicantDetailsResponseDto;
 import dmu.dasom.api.domain.applicant.dto.ApplicantResponseDto;
 import dmu.dasom.api.domain.applicant.entity.Applicant;
 import dmu.dasom.api.domain.applicant.repository.ApplicantRepository;
@@ -38,4 +39,12 @@ public PageResponse<ApplicantResponseDto> getApplicants(final int page) {
         return PageResponse.from(applicants.map(Applicant::toApplicantResponse));
     }
 
+    // 지원자 상세 조회
+    @Override
+    public ApplicantDetailsResponseDto getApplicant(final Long id) {
+        return applicantRepository.findById(id)
+                .map(Applicant::toApplicantDetailsResponse)
+                .orElseThrow(() -> new CustomException(ErrorCode.EMPTY_RESULT));
+    }
+
 }

src/main/java/dmu/dasom/api/global/admin/controller/AdminController.java

@@ -1,5 +1,6 @@
 package dmu.dasom.api.global.admin.controller;
 
+import dmu.dasom.api.domain.applicant.dto.ApplicantDetailsResponseDto;
 import dmu.dasom.api.domain.applicant.dto.ApplicantResponseDto;
 import dmu.dasom.api.domain.applicant.service.ApplicantService;
 import dmu.dasom.api.global.dto.PageResponse;
@@ -13,10 +14,7 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.ErrorResponse;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 @RestController
 @RequestMapping("/api/admin")
@@ -26,7 +24,7 @@ public class AdminController {
     private final ApplicantService applicantService;
 
     // 지원자 조회
-    @Operation(summary = "지원자 조회")
+    @Operation(summary = "지원자 전체 조회")
     @ApiResponses(value = {
             @ApiResponse(responseCode = "200", description = "지원자 조회 성공"),
             @ApiResponse(responseCode = "400", description = "잘못된 요청",
@@ -36,7 +34,7 @@ public class AdminController {
                             examples = {
                                     @ExampleObject(
                                             name = "조회 결과 없음",
-                                            value = "{ \"code\": \"C011\", \"message\": \"조회 결과가 없습니다.\" }"
+                                            value = "{ \"code\": \"C012\", \"message\": \"조회 결과가 없습니다.\" }"
                                     )
                             }
                     )
@@ -49,4 +47,26 @@ public ResponseEntity<PageResponse<ApplicantResponseDto>> getApplicants(
         return ResponseEntity.ok(applicantService.getApplicants(page));
     }
 
+    // 지원자 상세 조회
+    @Operation(summary = "지원자 상세 조회")
+    @ApiResponses(value = {
+            @ApiResponse(responseCode = "200", description = "지원자 상세 조회 성공"),
+            @ApiResponse(responseCode = "400", description = "잘못된 요청",
+                    content = @Content(
+                            mediaType = "application/json",
+                            schema = @Schema(implementation = ErrorResponse.class),
+                            examples = {
+                                    @ExampleObject(
+                                            name = "조회 결과 없음",
+                                            value = "{ \"code\": \"C012\", \"message\": \"조회 결과가 없습니다.\" }"
+                                    )
+                            }
+                    )
+            )
+    })
+    @GetMapping("/applicants/{id}")
+    public ResponseEntity<ApplicantDetailsResponseDto> getApplicant(@PathVariable("id") @Min(0) final Long id) {
+        return ResponseEntity.ok(applicantService.getApplicant(id));
+    }
+
 }