Merge pull request #21 from jojaeng2/feature/#13-Feed-CRUD-생성

[피드] Post 단순 CRUD 생성

sns_service/src/main/kotlin/joryu/sns_service/post/controller/PostController.kt

@@ -0,0 +1,46 @@
+package joryu.sns_service.post.controller
+
+import joryu.sns_service.post.dto.req.PostCreateRequest
+import joryu.sns_service.post.dto.req.PostUpdateRequest
+import joryu.sns_service.post.dto.resp.PostResponse
+import joryu.sns_service.post.service.PostService
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.DeleteMapping
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+import org.springframework.web.bind.annotation.PostMapping
+import org.springframework.web.bind.annotation.PutMapping
+import org.springframework.web.bind.annotation.RequestBody
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+import java.net.URI
+
+@RestController
+@RequestMapping("/posts")
+class PostController(
+    private val postService: PostService
+) {
+    @PostMapping
+    fun createPost(@RequestBody req: PostCreateRequest): ResponseEntity<Void> {
+        val postId = postService.create(req.content)
+        return ResponseEntity.created(URI.create("/posts/${postId}")).build()
+    }
+
+    @GetMapping("/{id}")
+    fun findPost(@PathVariable id: Long): ResponseEntity<PostResponse> {
+        val post = postService.findOneById(id)
+        return ResponseEntity.ok(PostResponse(post))
+    }
+
+    @PutMapping("/{id}")
+    fun updatePost(@PathVariable id: Long, @RequestBody req: PostUpdateRequest): ResponseEntity<Void> {
+        postService.update(id, req.content)
+        return ResponseEntity.noContent().build()
+    }
+
+    @DeleteMapping("/{id}")
+    fun deletePost(@PathVariable id: Long): ResponseEntity<Void> {
+        postService.delete(id)
+        return ResponseEntity.noContent().build()
+    }
+}

sns_service/src/main/kotlin/joryu/sns_service/post/dto/req/PostCreateRequest.kt

@@ -0,0 +1,5 @@
+package joryu.sns_service.post.dto.req
+
+data class PostCreateRequest(
+    val content: String
+)

sns_service/src/main/kotlin/joryu/sns_service/post/dto/req/PostUpdateRequest.kt

@@ -0,0 +1,5 @@
+package joryu.sns_service.post.dto.req
+
+data class PostUpdateRequest(
+    val content: String
+)

sns_service/src/main/kotlin/joryu/sns_service/post/dto/resp/PostResponse.kt

@@ -0,0 +1,15 @@
+package joryu.sns_service.post.dto.resp
+
+import joryu.sns_service.post.entity.Post
+
+data class PostResponse(
+    val id: Long,
+    val content: String,
+    val viewCount: Long,
+) {
+    constructor(post: Post) : this(
+        id = post.id,
+        content = post.content,
+        viewCount = post.viewCount
+    )
+}

sns_service/src/main/kotlin/joryu/sns_service/post/entity/Post.kt

@@ -26,4 +26,8 @@ class Post(
     @Column(name = "content", nullable = false, length = 1000)
     var content: String = content
         private set
+
+    fun changeContent(content: String) {
+        this.content = content
+    }
 }

sns_service/src/main/kotlin/joryu/sns_service/post/service/PostService.kt

@@ -0,0 +1,32 @@
+package joryu.sns_service.post.service
+
+import joryu.sns_service.post.entity.Post
+import joryu.sns_service.post.repository.PostRepository
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+
+@Service
+@Transactional(readOnly = true)
+class PostService(
+    val postRepository: PostRepository
+) {
+    @Transactional
+    fun create(content: String): Long {
+        return postRepository.save(Post(content)).id
+    }
+
+    fun findOneById(id: Long): Post {
+        return postRepository.findById(id).orElseThrow()
+    }
+
+    @Transactional
+    fun update(id: Long, newContent: String) {
+        val postForUpdate = postRepository.findById(id).orElseThrow()
+        postForUpdate.changeContent(newContent)
+    }
+
+    @Transactional
+    fun delete(id: Long) {
+        postRepository.deleteById(id)
+    }
+}