✨ [STMT-193] 스터디 탈퇴 기능 구현

src/docs/asciidoc/index.adoc

@@ -250,3 +250,29 @@ include::{snippets}/get-study-members/fail/not-joined-member/response-fields.ado
 ===== 응답 실패 (404)
 include::{snippets}/get-study-members/fail/not-exist-study/response-body.adoc[]
 include::{snippets}/get-study-members/fail/not-exist-study/response-fields.adoc[]
+
+=== 스터디 멤버 탈퇴
+
+전달받은 스터디에 대해 탈퇴하는 API입니다.
+
+==== DELETE /v1/api/studies/{studyId}/members/me
+
+===== 요청
+include::{snippets}/leave-study/success/http-request.adoc[]
+include::{snippets}/leave-study/success/request-headers.adoc[]
+include::{snippets}/leave-study/success/path-parameters.adoc[]
+
+===== 응답 성공 (200)
+.스터디 탈퇴 성공
+include::{snippets}/leave-study/success/response-body.adoc[]
+include::{snippets}/leave-study/success/response-fields.adoc[]
+
+===== 응답 실패 (403)
+.스터디에 가입한 멤버가 아닌 경우
+include::{snippets}/leave-study/fail/not-joined-member/response-body.adoc[]
+include::{snippets}/leave-study/fail/not-joined-member/response-fields.adoc[]
+
+===== 응답 실패 (404)
+.전달한 스터디가 존재하지 않는 경우
+include::{snippets}/leave-study/fail/not-exist-study/response-body.adoc[]
+include::{snippets}/leave-study/fail/not-exist-study/response-fields.adoc[]

src/main/java/com/stumeet/server/common/model/ApiResponse.java

@@ -20,6 +20,10 @@ public static <T> ApiResponse<T> success(SuccessCode code, T data) {
         return new ApiResponse<>(code.getHttpStatusCode(), code.getMessage(), data);
     }
 
+    public static <T> ApiResponse<T> success(SuccessCode code) {
+        return new ApiResponse<>(code.getHttpStatusCode(), code.getMessage(), null);
+    }
+
     public static ApiResponse<Void> fail(ErrorCode errorCode) {
         return new ApiResponse<>(
                 errorCode.getHttpStatusCode(),

src/main/java/com/stumeet/server/common/response/SuccessCode.java

@@ -12,8 +12,8 @@ public enum SuccessCode {
     GET_SUCCESS(HttpStatus.OK, "조회에 성공했습니다."),
     POST_SUCCESS(HttpStatus.CREATED, "생성에 성공했습니다."),
     SIGN_UP_SUCCESS(HttpStatus.CREATED, "회원가입에 성공했습니다."),
-    FILE_UPLOAD_SUCCESS(HttpStatus.CREATED, "파일 업로드에 성공했습니다.")
-    ;
+    FILE_UPLOAD_SUCCESS(HttpStatus.CREATED, "파일 업로드에 성공했습니다."),
+    STUDY_LEAVE_SUCCESS(HttpStatus.OK, "스터디 탈퇴에 성공했습니다.");
 
     private final HttpStatus httpStatus;
     private final String message;

src/main/java/com/stumeet/server/studymember/adapter/in/web/StudyMemberLeaveApi.java

@@ -0,0 +1,31 @@
+package com.stumeet.server.studymember.adapter.in.web;
+
+import com.stumeet.server.common.annotation.WebAdapter;
+import com.stumeet.server.common.auth.model.LoginMember;
+import com.stumeet.server.common.model.ApiResponse;
+import com.stumeet.server.common.response.SuccessCode;
+import com.stumeet.server.studymember.application.port.in.StudyMemberLeaveUseCase;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+@WebAdapter
+@RequestMapping("/api/v1")
+@RequiredArgsConstructor
+public class StudyMemberLeaveApi {
+
+    private final StudyMemberLeaveUseCase studyMemberLeaveUseCase;
+
+    @DeleteMapping("/studies/{studyId}/members/me")
+    public ResponseEntity<ApiResponse<Void>> leave(
+            @PathVariable Long studyId,
+            @AuthenticationPrincipal LoginMember member
+    ) {
+        studyMemberLeaveUseCase.leave(studyId, member.getMember().getId());
+        return new ResponseEntity<>(ApiResponse.success(SuccessCode.STUDY_LEAVE_SUCCESS), HttpStatus.OK);
+    }
+}

src/main/java/com/stumeet/server/studymember/adapter/out/persistence/JpaStudyMemberRepository.java

@@ -4,4 +4,6 @@
 
 public interface JpaStudyMemberRepository extends JpaRepository<StudyMemberJpaEntity, Long>, JpaStudyMemberRepositoryCustom {
     long countByStudyId(Long studyId);
+
+    void deleteByStudyIdAndMemberId(Long studyId, Long memberId);
 }

src/main/java/com/stumeet/server/studymember/adapter/out/persistence/StudyMemberLeavePersistenceAdapter.java

@@ -0,0 +1,16 @@
+package com.stumeet.server.studymember.adapter.out.persistence;
+
+import com.stumeet.server.common.annotation.PersistenceAdapter;
+import com.stumeet.server.studymember.application.port.out.StudyMemberLeavePort;
+import lombok.RequiredArgsConstructor;
+
+@PersistenceAdapter
+@RequiredArgsConstructor
+public class StudyMemberLeavePersistenceAdapter implements StudyMemberLeavePort {
+    private final JpaStudyMemberRepository jpaStudyMemberRepository;
+
+    @Override
+    public void leave(Long studyId, Long memberId) {
+        jpaStudyMemberRepository.deleteByStudyIdAndMemberId(studyId, memberId);
+    }
+}

src/main/java/com/stumeet/server/studymember/application/port/in/StudyMemberLeaveUseCase.java

@@ -0,0 +1,5 @@
+package com.stumeet.server.studymember.application.port.in;
+
+public interface StudyMemberLeaveUseCase {
+    void leave(Long studyId, Long memberId);
+}

src/main/java/com/stumeet/server/studymember/application/port/out/StudyMemberLeavePort.java

@@ -0,0 +1,5 @@
+package com.stumeet.server.studymember.application.port.out;
+
+public interface StudyMemberLeavePort {
+    void leave(Long studyId, Long memberId);
+}

src/main/java/com/stumeet/server/studymember/application/service/StudyMemberLeaveService.java

@@ -0,0 +1,27 @@
+package com.stumeet.server.studymember.application.service;
+
+import com.stumeet.server.common.annotation.UseCase;
+import com.stumeet.server.study.application.port.in.StudyValidationUseCase;
+import com.stumeet.server.studymember.application.port.in.StudyMemberLeaveUseCase;
+import com.stumeet.server.studymember.application.port.in.StudyMemberValidationUseCase;
+import com.stumeet.server.studymember.application.port.out.StudyMemberLeavePort;
+import lombok.RequiredArgsConstructor;
+import org.springframework.transaction.annotation.Transactional;
+
+@UseCase
+@Transactional
+@RequiredArgsConstructor
+public class StudyMemberLeaveService implements StudyMemberLeaveUseCase {
+    private final StudyValidationUseCase studyValidationUseCase;
+    private final StudyMemberValidationUseCase studyMemberValidationUseCase;
+    private final StudyMemberLeavePort studyMemberLeavePort;
+
+
+    @Override
+    public void leave(Long studyId, Long memberId) {
+        studyValidationUseCase.checkById(studyId);
+        studyMemberValidationUseCase.checkStudyJoinMember(studyId, memberId);
+
+        studyMemberLeavePort.leave(studyId, memberId);
+    }
+}

src/test/java/com/stumeet/server/studymember/adapter/in/web/StudyMemberLeaveApiTest.java

@@ -0,0 +1,97 @@
+package com.stumeet.server.studymember.adapter.in.web;
+
+import com.stumeet.server.common.auth.model.AuthenticationHeader;
+import com.stumeet.server.helper.WithMockMember;
+import com.stumeet.server.stub.StudyStub;
+import com.stumeet.server.stub.TokenStub;
+import com.stumeet.server.template.ApiTest;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import static org.springframework.restdocs.headers.HeaderDocumentation.headerWithName;
+import static org.springframework.restdocs.headers.HeaderDocumentation.requestHeaders;
+import static org.springframework.restdocs.mockmvc.MockMvcRestDocumentation.document;
+import static org.springframework.restdocs.mockmvc.RestDocumentationRequestBuilders.delete;
+import static org.springframework.restdocs.operation.preprocess.Preprocessors.*;
+import static org.springframework.restdocs.payload.PayloadDocumentation.fieldWithPath;
+import static org.springframework.restdocs.payload.PayloadDocumentation.responseFields;
+import static org.springframework.restdocs.request.RequestDocumentation.parameterWithName;
+import static org.springframework.restdocs.request.RequestDocumentation.pathParameters;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+class StudyMemberLeaveApiTest extends ApiTest {
+
+    @Nested
+    @DisplayName("스터디 멤버 탈퇴 API")
+    class Leave {
+
+        private final String path = "/api/v1/studies/{studyId}/members/me";
+
+        @Test
+        @WithMockMember
+        @DisplayName("[성공] 스터디 멤버 탈퇴에 성공한다.")
+        void successTest() throws Exception {
+            Long studyId = StudyStub.getStudyId();
+
+            mockMvc.perform(delete(path, studyId)
+                            .header(AuthenticationHeader.ACCESS_TOKEN.getName(), TokenStub.getMockAccessToken()))
+                    .andExpect(status().isOk())
+                    .andDo(document("leave-study/success",
+                            preprocessRequest(prettyPrint()),
+                            preprocessResponse(prettyPrint()),
+                            requestHeaders(headerWithName(AuthenticationHeader.ACCESS_TOKEN.getName()).description("서버로부터 전달받은 액세스 토큰")),
+                            pathParameters(
+                                    parameterWithName("studyId").description("스터디 ID")
+                            ),
+                            responseFields(
+                                    fieldWithPath("code").description("응답 코드"),
+                                    fieldWithPath("message").description("응답 메시지")
+                            )));
+        }
+
+        @Test
+        @WithMockMember
+        @DisplayName("[실패] 스터디가 존재하지 않는 경우 스터디 멤버 탈퇴에 실패한다.")
+        void notExistStudyTest() throws Exception {
+            Long invalidStudyId = StudyStub.getInvalidStudyId();
+
+            mockMvc.perform(delete(path, invalidStudyId)
+                            .header(AuthenticationHeader.ACCESS_TOKEN.getName(), TokenStub.getMockAccessToken()))
+                    .andExpect(status().isNotFound())
+                    .andDo(document("leave-study/fail/not-exist-study",
+                            preprocessRequest(prettyPrint()),
+                            preprocessResponse(prettyPrint()),
+                            requestHeaders(headerWithName(AuthenticationHeader.ACCESS_TOKEN.getName()).description("서버로부터 전달받은 액세스 토큰")),
+                            pathParameters(
+                                    parameterWithName("studyId").description("스터디 ID")
+                            ),
+                            responseFields(
+                                    fieldWithPath("code").description("응답 코드"),
+                                    fieldWithPath("message").description("응답 메시지")
+                            )));
+        }
+
+        @Test
+        @WithMockMember(id = 0L)
+        @DisplayName("[실패] 스터디에 가입된 멤버가 아닌 경우 스터디 멤버 탈퇴에 실패한다.")
+        void notStudyJoinMemberTest() throws Exception {
+            Long studyId = StudyStub.getStudyId();
+
+            mockMvc.perform(delete(path, studyId)
+                            .header(AuthenticationHeader.ACCESS_TOKEN.getName(), TokenStub.getMockAccessToken()))
+                    .andExpect(status().isForbidden())
+                    .andDo(document("leave-study/fail/not-joined-member",
+                            preprocessRequest(prettyPrint()),
+                            preprocessResponse(prettyPrint()),
+                            requestHeaders(headerWithName(AuthenticationHeader.ACCESS_TOKEN.getName()).description("서버로부터 전달받은 액세스 토큰")),
+                            pathParameters(
+                                    parameterWithName("studyId").description("스터디 ID")
+                            ),
+                            responseFields(
+                                    fieldWithPath("code").description("응답 코드"),
+                                    fieldWithPath("message").description("응답 메시지")
+                            )));
+        }
+    }
+}

src/test/java/com/stumeet/server/studymember/application/service/StudyMemberLeaveServiceTest.java

@@ -0,0 +1,77 @@
+package com.stumeet.server.studymember.application.service;
+
+import com.stumeet.server.stub.MemberStub;
+import com.stumeet.server.stub.StudyStub;
+import com.stumeet.server.study.application.port.in.StudyValidationUseCase;
+import com.stumeet.server.study.domain.exception.StudyNotExistsException;
+import com.stumeet.server.studymember.application.port.in.StudyMemberValidationUseCase;
+import com.stumeet.server.studymember.application.port.out.StudyMemberLeavePort;
+import com.stumeet.server.studymember.domain.exception.StudyMemberNotJoinedException;
+import com.stumeet.server.template.UnitTest;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+
+import static org.assertj.core.api.Assertions.assertThatCode;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.BDDMockito.then;
+import static org.mockito.BDDMockito.willThrow;
+
+class StudyMemberLeaveServiceTest extends UnitTest {
+
+    @InjectMocks
+    private StudyMemberLeaveService studyMemberLeaveService;
+
+    @Mock
+    private StudyValidationUseCase studyValidationUseCase;
+
+    @Mock
+    private StudyMemberValidationUseCase studyMemberValidationUseCase;
+
+    @Mock
+    private StudyMemberLeavePort studyMemberLeavePort;
+
+    @Nested
+    @DisplayName("스터디 멤버 탈퇴")
+    class Leave {
+
+        @Test
+        @DisplayName("[성공] 스터디 멤버 탈퇴에 성공한다.")
+        void successTest() {
+            Long studyId = StudyStub.getStudyId();
+            Long memberId = MemberStub.getMemberId();
+
+            studyMemberLeaveService.leave(studyId, memberId);
+
+            then(studyMemberLeavePort).should().leave(any(), any());
+        }
+
+        @Test
+        @DisplayName("[실패] 스터디가 존재하지 않는 경우 예외가 발생한다.")
+        void studyNotFoundTest() {
+            Long studyId = StudyStub.getInvalidStudyId();
+            Long memberId = MemberStub.getMemberId();
+
+            willThrow(StudyNotExistsException.class)
+                    .given(studyValidationUseCase).checkById(studyId);
+
+            assertThatCode(() -> studyMemberLeaveService.leave(studyId, memberId))
+                    .isInstanceOf(StudyNotExistsException.class);
+        }
+
+        @Test
+        @DisplayName("[실패] 해당 스터디에 가입한 회원이 아닌 경우 예외가 발생한다.")
+        void notJoinMemberTest() {
+            Long studyId = StudyStub.getStudyId();
+            Long memberId = MemberStub.getMemberId();
+
+            willThrow(StudyMemberNotJoinedException.class)
+                    .given(studyMemberValidationUseCase).checkStudyJoinMember(studyId, memberId);
+
+            assertThatCode(() -> studyMemberLeaveService.leave(studyId, memberId))
+                    .isInstanceOf(StudyMemberNotJoinedException.class);
+        }
+    }
+}