Merge pull request #25 from Hackathon0704/feat/21

[feat/21] 친구 공유글 생성, 조회 API 구현

src/main/java/com/umc/dream/controller/FriendPostController.java

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+package com.umc.dream.controller;
+
+import com.umc.dream.apiPayload.ApiResponse;
+import com.umc.dream.converter.FriendPostConverter;
+import com.umc.dream.domain.Post;
+import com.umc.dream.dto.FriendRequestDTO;
+import com.umc.dream.dto.FriendResponseDTO;
+import com.umc.dream.service.FriendService;
+import io.swagger.v3.oas.annotations.Operation;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/posts/following")
+public class FriendPostController {
+
+    private final FriendService friendService;
+
+    @Operation(summary = "친구 게시물 생성 API")
+    @PostMapping
+    public ApiResponse<FriendResponseDTO.CreateResultDTO> createFriendPost(@RequestBody FriendRequestDTO.CreateFriendRequestDTO request){
+        Post post = friendService.createFriendPost(request);
+        return ApiResponse.onSuccess(FriendPostConverter.toFriendPostResultDTO(post));
+    }
+
+    @Operation(summary = "친구 전체 게시물 조회 API")
+    @GetMapping
+    public ApiResponse<FriendResponseDTO.FriendPostListDTO> getAllFriendPostList(@RequestParam(name = "userId") Long userId) {
+        List<Post> posts = friendService.getAllFriendPostList(userId);
+        return ApiResponse.onSuccess(FriendPostConverter.toFriendPostListDTO(posts));
+    }
+}

src/main/java/com/umc/dream/converter/FriendPostConverter.java

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+package com.umc.dream.converter;
+
+import com.umc.dream.domain.Post;
+import com.umc.dream.domain.User;
+import com.umc.dream.domain.enums.Type;
+import com.umc.dream.dto.FriendRequestDTO;
+import com.umc.dream.dto.FriendResponseDTO;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class FriendPostConverter {
+    public static Post toFriendPost(FriendRequestDTO.CreateFriendRequestDTO request, User writer) {
+        return Post.builder()
+                .title(request.getTitle())
+                .content(request.getContent())
+                .type(Type.FRIENDS)
+                .writer(writer)
+                .build();
+    }
+
+    public static FriendResponseDTO.CreateResultDTO toFriendPostResultDTO(Post post) {
+        return FriendResponseDTO.CreateResultDTO.builder()
+                .name(post.getWriter().getName())
+                .postId(post.getId())
+                .title(post.getTitle())
+                .content(post.getContent())
+                .createdAt(post.getCreatedDate())
+                .build();
+    }
+
+    public static FriendResponseDTO.FriendPostListDTO toFriendPostListDTO(List<Post> posts) {
+        List<FriendResponseDTO.CreateResultDTO> postDTOs = posts.stream()
+                .map(post -> FriendResponseDTO.CreateResultDTO.builder()
+                        .name(post.getWriter().getName())
+                        .postId(post.getId())
+                        .title(post.getTitle())
+                        .content(post.getContent())
+                        .createdAt(post.getCreatedDate())
+                        .build())
+                .collect(Collectors.toList());
+        return new FriendResponseDTO.FriendPostListDTO(postDTOs);
+    }
+}

src/main/java/com/umc/dream/dto/FriendRequestDTO.java

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+package com.umc.dream.dto;
+
+import lombok.Getter;
+
+public class FriendRequestDTO {
+
+    @Getter
+    public static class CreateFriendRequestDTO {
+        Long userId;  // 유저 id
+        String title;
+        String content;
+    }
+
+    @Getter
+    public static class GetAllProPostRequestDTO {
+        Long userId;
+    }
+}

src/main/java/com/umc/dream/dto/FriendResponseDTO.java

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+package com.umc.dream.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+public class FriendResponseDTO {
+    @Builder
+    @Getter
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class CreateResultDTO {
+        String name;    // 유저 이름
+        Long postId;
+        String title;
+        String content;
+        LocalDateTime createdAt;
+    }
+
+    @Builder
+    @Getter
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class FriendPostListDTO {
+        private List<FriendResponseDTO.CreateResultDTO> posts;
+    }
+}

src/main/java/com/umc/dream/service/FriendService.java

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+package com.umc.dream.service;
+
+import com.umc.dream.apiPayload.code.status.ErrorStatus;
+import com.umc.dream.apiPayload.exception.GeneralException;
+import com.umc.dream.converter.FriendPostConverter;
+import com.umc.dream.domain.Post;
+import com.umc.dream.domain.User;
+import com.umc.dream.domain.enums.Type;
+import com.umc.dream.dto.FriendRequestDTO;
+import com.umc.dream.repository.PostRepository;
+import com.umc.dream.repository.UserRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class FriendService {
+
+    private final UserRepository userRepository;
+    private final PostRepository postRepository;
+
+    public Post createFriendPost(FriendRequestDTO.CreateFriendRequestDTO request) {
+        User writer = userRepository.findById(request.getUserId())
+                .orElseThrow(() -> new GeneralException(ErrorStatus._BAD_REQUEST));
+        Post post = FriendPostConverter.toFriendPost(request, writer);
+        return postRepository.save(post);
+    }
+
+    public List<Post> getAllFriendPostList(Long userId) {
+        return postRepository.findAllByWriterIdAndType(userId, Type.FRIENDS);
+    }
+
+}