feat: StudyService #1 (Make Study, Get Study, Pagination)

src/main/java/dcom/homepage/api/domain/study/repository/StudyRepository.java

@@ -0,0 +1,15 @@
+package dcom.homepage.api.domain.study.repository;
+
+import dcom.homepage.api.domain.study.Study;
+import dcom.homepage.api.domain.study.dto.StudyResponseDto;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+
+public interface StudyRepository extends JpaRepository<Study, Integer> {
+    Optional<Study> getStudyById(Integer id);
+    Page<Study> findAll(Pageable pageable);
+    Page<Study> findAllByNameContains(String name, Pageable pageable);
+}

src/main/java/dcom/homepage/api/domain/study/service/StudyService.java

@@ -0,0 +1,18 @@
+package dcom.homepage.api.domain.study.service;
+
+import dcom.homepage.api.domain.study.Study;
+import dcom.homepage.api.domain.study.dto.StudyRequestDto;
+import dcom.homepage.api.domain.study.dto.StudyResponseDto;
+import dcom.homepage.api.domain.users.User;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface StudyService {
+    StudyResponseDto.Info findStudyById(Integer id);
+    StudyResponseDto.SimpleInfo makeStudy(User user, StudyRequestDto.Make make);
+    Page<StudyResponseDto.SimpleInfo> findAll(Pageable pageable);
+    Page<StudyResponseDto.SimpleInfo> findAllByNameContains(String name, Pageable pageable);
+}

src/main/java/dcom/homepage/api/domain/study/service/StudyServiceImpl.java

@@ -0,0 +1,51 @@
+package dcom.homepage.api.domain.study.service;
+
+import dcom.homepage.api.domain.study.Study;
+import dcom.homepage.api.domain.study.dto.StudyRequestDto;
+import dcom.homepage.api.domain.study.dto.StudyResponseDto;
+import dcom.homepage.api.domain.study.repository.StudyRepository;
+import dcom.homepage.api.domain.users.User;
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+import org.springframework.web.server.ResponseStatusException;
+
+@Service
+@RequiredArgsConstructor
+public class StudyServiceImpl implements StudyService {
+    private final StudyRepository studyRepository;
+
+    @Override
+    public StudyResponseDto.Info findStudyById(Integer id) {
+        return StudyResponseDto.Info.of(studyRepository.getStudyById(id).orElseThrow(
+                () -> new ResponseStatusException(HttpStatus.NOT_FOUND, "스터디를 찾을 수 없습니다.")
+        ));
+    }
+
+    @Override
+    public StudyResponseDto.SimpleInfo makeStudy(User user, StudyRequestDto.Make make) {
+        Study study = Study.builder()
+                .name(make.getName())
+                .type(make.getType())
+                .description(make.getDescription())
+                .startDate(make.getStartDate())
+                .endDate(make.getEndDate())
+                .cycle(make.getCycle())
+                .build();
+        studyRepository.save(study);
+
+        return StudyResponseDto.SimpleInfo.of(study);
+    }
+
+    @Override
+    public Page<StudyResponseDto.SimpleInfo> findAll(Pageable pageable) {
+        return studyRepository.findAll(pageable).map(StudyResponseDto.SimpleInfo::of);
+    }
+
+    @Override
+    public Page<StudyResponseDto.SimpleInfo> findAllByNameContains(String name, Pageable pageable) {
+        return studyRepository.findAllByNameContains(name, pageable).map(StudyResponseDto.SimpleInfo::of);
+    }
+}