[#9] Request 기능 구현 (#48)

* feat: 등하원 도우미 신청 서비스 및 엔드 포인트 정의

#9

* feat: 포스트 신청 게시글 관련 DTO 정의

#9

* feat: 비즈니스 예외처리 로직 적용

#9

* test: 테스트 코드 추가

#9

* fix: 코드리뷰 반영

- url 변경
- 로그인여부 검증

* fix: 불필요한 NotNull 어노테이션 제거

src/main/java/com/flab/kidsafer/controller/PostRequestController.java

@@ -0,0 +1,64 @@
+package com.flab.kidsafer.controller;
+
+import com.flab.kidsafer.config.auth.LoginUser;
+import com.flab.kidsafer.config.auth.dto.SessionUser;
+import com.flab.kidsafer.domain.enums.UserType;
+import com.flab.kidsafer.dto.PostRequestDTO;
+import com.flab.kidsafer.error.exception.OperationNotAllowedException;
+import com.flab.kidsafer.error.exception.UserNotSignInException;
+import com.flab.kidsafer.service.PostRequestService;
+import java.util.List;
+import org.springframework.beans.factory.annotation.Autowired;
+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.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/posts/{postId}/requests")
+public class PostRequestController {
+
+  @Autowired
+  private PostRequestService postRequestService;
+
+  @GetMapping("/mine")
+  public ResponseEntity<PostRequestDTO> getSingleRequest(@PathVariable int postId,
+      @LoginUser SessionUser user) {
+    checkUserSignIn(user);
+    return ResponseEntity.ok(postRequestService.getSingleRequest(postId, user.getId()));
+  }
+
+  @GetMapping
+  public ResponseEntity<List<PostRequestDTO>> getAllRequests(@PathVariable int postId,
+      @LoginUser SessionUser user) {
+    checkUserSignIn(user);
+    return ResponseEntity.ok(postRequestService.getAllRequests(postId));
+  }
+
+  @PostMapping
+  public void applyRequest(@RequestBody PostRequestDTO postRequestDTO, @PathVariable int postId,
+      @LoginUser SessionUser user) {
+    if (user.getType() != UserType.SAFER) {
+      throw new OperationNotAllowedException();
+    }
+    postRequestService.applyRequest(postRequestDTO);
+  }
+
+  @DeleteMapping
+  public void cancelRequest(@PathVariable int postId, @LoginUser SessionUser user) {
+    if (user.getType() != UserType.SAFER) {
+      throw new OperationNotAllowedException();
+    }
+    postRequestService.cancelRequest(postId, user.getId());
+  }
+
+  public void checkUserSignIn(SessionUser user) {
+    if (user == null) {
+      throw new UserNotSignInException();
+    }
+  }
+}

src/main/java/com/flab/kidsafer/dto/PostRequestDTO.java

@@ -0,0 +1,101 @@
+package com.flab.kidsafer.dto;
+
+import java.time.LocalDateTime;
+import javax.validation.constraints.NotNull;
+
+public class PostRequestDTO {
+
+    private int id;
+
+    @NotNull
+    private int postId;
+
+    @NotNull
+    private int userId;
+
+    private String contents;
+    private LocalDateTime registerDate;
+
+    public PostRequestDTO(int id, int postId,
+        int userId, String contents, LocalDateTime registerDate) {
+        this.id = id;
+        this.postId = postId;
+        this.userId = userId;
+        this.contents = contents;
+        this.registerDate = registerDate;
+    }
+
+    public PostRequestDTO(PostRequestDTO.Builder builder) {
+        this.id = builder.id;
+        this.postId = builder.postId;
+        this.userId = builder.userId;
+        this.contents = builder.contents;
+        this.registerDate = builder.registerDate;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public int getPostId() {
+        return postId;
+    }
+
+    public int getUserId() {
+        return userId;
+    }
+
+    public String getContents() {
+        return contents;
+    }
+
+    public LocalDateTime getRegisterDate() {
+        return registerDate;
+    }
+
+    public static class Builder {
+
+        private int id;
+        private int postId;
+        private int userId;
+        private String contents;
+        private LocalDateTime registerDate;
+
+        public Builder() {
+        }
+
+        public Builder(int id) {
+            this.id = id;
+        }
+
+        public PostRequestDTO.Builder id(int id) {
+            this.id = id;
+            return this;
+        }
+
+        public PostRequestDTO.Builder postId(int postId) {
+            this.postId = postId;
+            return this;
+        }
+
+        public PostRequestDTO.Builder userId(int userId) {
+            this.userId = userId;
+            return this;
+        }
+
+        public PostRequestDTO.Builder contents(String contents) {
+            this.contents = contents;
+            return this;
+        }
+
+        public PostRequestDTO.Builder registerDate(LocalDateTime registerDate) {
+            this.registerDate = registerDate;
+            return this;
+        }
+
+        public PostRequestDTO build() {
+            return new PostRequestDTO(this);
+        }
+    }
+
+}

src/main/java/com/flab/kidsafer/mapper/PostRequestMapper.java

@@ -0,0 +1,18 @@
+package com.flab.kidsafer.mapper;
+
+import com.flab.kidsafer.dto.PostRequestDTO;
+import java.util.List;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper
+public interface PostRequestMapper {
+
+    List<PostRequestDTO> getAllRequests(int postId);
+
+    PostRequestDTO getSingleRequest(int postId, int userId);
+
+    void applyRequest(PostRequestDTO postRequestDTO);
+
+    void cancelRequest(int postId, int userId);
+
+}

src/main/java/com/flab/kidsafer/service/PostRequestService.java

@@ -0,0 +1,50 @@
+package com.flab.kidsafer.service;
+
+import com.flab.kidsafer.dto.PostRequestDTO;
+import com.flab.kidsafer.error.exception.OperationNotAllowedException;
+import com.flab.kidsafer.error.exception.PostNotFoundException;
+import com.flab.kidsafer.mapper.PostMapper;
+import com.flab.kidsafer.mapper.PostRequestMapper;
+import java.util.List;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class PostRequestService {
+
+    @Autowired
+    private PostRequestMapper postRequestMapper;
+
+    @Autowired
+    private PostMapper postMapper;
+
+    public List<PostRequestDTO> getAllRequests(int postId) {
+        if (postMapper.findPostById(postId) == null) {
+            throw new PostNotFoundException();
+        }
+        return postRequestMapper.getAllRequests(postId);
+    }
+
+    public PostRequestDTO getSingleRequest(int postId, int userId) {
+        if (postMapper.findPostById(postId) == null) {
+            throw new PostNotFoundException();
+        }
+        return postRequestMapper.getSingleRequest(postId, userId);
+    }
+
+
+    public void applyRequest(PostRequestDTO postRequestDTO) {
+        if (getSingleRequest(postRequestDTO.getPostId(), postRequestDTO.getUserId()) != null) {
+            throw new OperationNotAllowedException();
+        }
+        postRequestMapper.applyRequest(postRequestDTO);
+    }
+
+    public void cancelRequest(int postId, int userId) {
+        if (getSingleRequest(postId, userId) == null) {
+            throw new OperationNotAllowedException();
+        }
+        postRequestMapper.cancelRequest(postId, userId);
+    }
+
+}

src/main/resources/mapper/PostRequestMapper.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.flab.kidsafer.mapper.PostRequestMapper">
+  <select id="getAllRequests" resultType="com.flab.kidsafer.dto.PostRequestDTO">
+    SELECT id, postId, userId, contents, registerDate
+    FROM posts_request
+    WHERE postID = #{postId}
+  </select>
+
+  <select id="getSingleRequest" resultType="com.flab.kidsafer.dto.PostRequestDTO">
+    SELECT id, postId, userId, contents, registerDate
+    FROM posts_request
+    WHERE postID = #{postId}
+    AND userId = #{userId}
+  </select>
+
+  <insert id="applyRequest" parameterType="com.flab.kidsafer.dto.PostRequestDTO">
+    INSERT INTO posts_request (postId, userId, contents, registerDate)
+    VALUES (#{postId},#{userId}, #{contents}, #{registerDate});
+  </insert>
+
+  <delete id="cancelRequest">
+    DELETE FROM posts_request
+    WHERE postId = #{postId}
+    AND userId = #{userId}
+  </delete>
+</mapper>