[feat] 컨텐츠 조회 API 구현 (#70)

* feat: 컨텐츠 아이디를 기반으로 컨텐츠를 조회하는 service 메서드 작성

* feat: 컨텐츠 아이디를 기반으로 컨텐츠를 조회하는 API 구현

* test: 컨텐츠 아이디를 기반으로 컨텐츠를 조회하는 API 테스트 작성

Author: RaZel713

backend/src/main/java/turip/content/controller/ContentController.java

@@ -3,10 +3,12 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 import turip.content.controller.dto.response.ContentCountResponse;
+import turip.content.controller.dto.response.ContentResponse;
 import turip.content.service.ContentService;
 
 @RestController
@@ -22,4 +24,12 @@ public ResponseEntity<ContentCountResponse> readCountByRegionName(
         ContentCountResponse response = contentService.countByRegionName(regionName);
         return ResponseEntity.ok(response);
     }
+
+    @GetMapping("/{id}")
+    public ResponseEntity<ContentResponse> readContentById(
+            @PathVariable Long id
+    ) {
+        ContentResponse response = contentService.getById(id);
+        return ResponseEntity.ok(response);
+    }
 }

backend/src/main/java/turip/content/controller/dto/response/ContentResponse.java

@@ -0,0 +1,24 @@
+package turip.content.controller.dto.response;
+
+import java.time.LocalDate;
+import turip.content.domain.Content;
+
+public record ContentResponse(
+        Long id,
+        Long creatorId,
+        Long regionId,
+        String title,
+        String url,
+        LocalDate uploadedDate
+) {
+    public static ContentResponse of(Content content) {
+        return new ContentResponse(
+                content.getId(),
+                content.getCreator().getId(),
+                content.getRegion().getId(),
+                content.getTitle(),
+                content.getUrl(),
+                content.getUploadedDate()
+        );
+    }
+}

backend/src/main/java/turip/content/service/ContentService.java

@@ -3,6 +3,7 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import turip.content.controller.dto.response.ContentCountResponse;
+import turip.content.controller.dto.response.ContentResponse;
 import turip.content.domain.Content;
 import turip.content.repository.ContentRepository;
 import turip.exception.NotFoundException;
@@ -18,8 +19,9 @@ public ContentCountResponse countByRegionName(String regionName) {
         return ContentCountResponse.from(count);
     }
 
-    private Content getById(Long id) {
-        return contentRepository.findById(id)
+    public ContentResponse getById(Long id) {
+        Content content = contentRepository.findById(id)
                 .orElseThrow(() -> new NotFoundException("컨텐츠를 찾을 수 없습니다."));
+        return ContentResponse.of(content);
     }
 }

backend/src/test/java/turip/content/api/ContentApiTest.java

@@ -57,4 +57,35 @@ void readCountByRegionName() {
                     .body("count", is(2));
         }
     }
+
+    @DisplayName("/contents/{id} GET 컨텐츠 단건 조회 테스트")
+    @Nested
+    class readContentById {
+        @DisplayName("id로 컨텐츠 단건 조회 성공 시 200 OK 코드와 컨텐츠 정보를 응답한다")
+        @Test
+        void readContentById() {
+            // given
+            jdbcTemplate.update(
+                    "INSERT INTO Creator (profile_image, channel_name) VALUES (?, ?)",
+                    "https://image.example.com/creator1.jpg", "TravelMate");
+            jdbcTemplate.update(
+                    "INSERT INTO Region (name) VALUES (?)",
+                    "seoul");
+            jdbcTemplate.update(
+                    "INSERT INTO Content (creator_id, region_id, url, title, uploaded_date) VALUES (?, ?, ?, ?, ?)",
+                    1, 1, "https://youtube.com/watch?v=abcd1", "서울 데이트 코스 추천", "2024-07-01");
+
+            // when & then
+            RestAssured.given().port(port)
+                    .when().get("/contents/{id}", 1)
+                    .then()
+                    .statusCode(200)
+                    .body("id", is(1))
+                    .body("creatorId", is(1))
+                    .body("regionId", is(1))
+                    .body("title", is("서울 데이트 코스 추천"))
+                    .body("url", is("https://youtube.com/watch?v=abcd1"))
+                    .body("uploadedDate", is("2024-07-01"));
+        }
+    }
 }