Api/feature/65

src/main/java/com/squadb/workassistantapi/domain/Member.java

@@ -8,13 +8,17 @@
 import javax.persistence.GenerationType;
 import javax.persistence.Id;
 
+import com.squadb.workassistantapi.service.exception.PermissionDeniedException;
 import com.squadb.workassistantapi.util.HashUtil;
 import com.squadb.workassistantapi.web.exception.LoginFailedException;
 
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
 @Getter
 @Entity
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
@@ -50,6 +54,25 @@ public boolean isAdmin() {
         return type.isAdmin();
     }
 
+    // 관리자 권한을 가진 사람에 대한 커스텀 액션 실행 메소드
+    public Member ifAdmin(Consumer<Member> action) {
+        if (isAdmin()) {
+            action.accept(this);
+            return this;
+        } else {
+            return null;
+        }
+    }
+
+    public <X extends Throwable> Member orElseThrow(Supplier<? extends X> exceptionSupplier) throws X {
+        if (this != null) {
+            return this;
+        } else {
+            throw (X) exceptionSupplier.get();
+        }
+
+    }
+
     public void checkEqualPassword(String passwordInput) {
         if (!HashUtil.equalPassword(passwordInput, passwordHash)) {
             throw LoginFailedException.wrongPassword();

src/main/java/com/squadb/workassistantapi/service/BookService.java

@@ -2,6 +2,7 @@
 
 import java.util.List;
 
+import com.squadb.workassistantapi.service.exception.PermissionDeniedException;
 import org.springframework.data.domain.Sort;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -37,6 +38,14 @@ public Long register(final Book book, final Long registrantId) {
         return saveBook.getId();
     }
 
+    @Transactional
+    public void delete(Long bookId, Long registrantId) {
+
+        memberService.findById(registrantId)
+                     .ifAdmin((m) -> bookRepository.deleteById(bookId))
+                     .orElseThrow(() -> new PermissionDeniedException("Authorization Required"));
+    }
+
     private void checkIsbnDuplication(final String isbn) {
         if (bookRepository.findByIsbn(isbn).isPresent()) {
             throw new KeyDuplicationException("key duplication book : [" + isbn + "]");

src/main/java/com/squadb/workassistantapi/service/exception/PermissionDeniedException.java

@@ -0,0 +1,8 @@
+package com.squadb.workassistantapi.service.exception;
+
+public class PermissionDeniedException extends RuntimeException {
+
+    public PermissionDeniedException(String message) {
+        super(message);
+    }
+}

src/main/java/com/squadb/workassistantapi/web/controller/BookApiController.java

@@ -3,16 +3,12 @@
 import java.util.List;
 import java.util.Objects;
 
+import com.squadb.workassistantapi.service.exception.PermissionDeniedException;
 import org.springframework.data.domain.Sort;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.ExceptionHandler;
-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.RestController;
+import org.springframework.web.bind.annotation.*;
 
 import com.squadb.workassistantapi.domain.Book;
 import com.squadb.workassistantapi.domain.exceptions.NoAuthorizationException;
@@ -51,6 +47,19 @@ public ResponseEntity<BookRegisterResponseDto> registerBook(@RequestBody BookReg
         return new ResponseEntity<>(BookRegisterResponseDto.success(bookId), HttpStatus.OK);
     }
 
+    @DeleteMapping(value = "/books/{id}", produces = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity deleteBook(@PathVariable Long id,
+                                     @CurrentLoginMember LoginMember loginMember) {
+        try {
+            bookService.delete(id, loginMember.getId());
+
+        } catch (PermissionDeniedException e) {
+            handleNoAuthorizationException();
+        }
+
+        return new ResponseEntity<>(HttpStatus.OK);
+    }
+
     @GetMapping(value = "/books", produces = MediaType.APPLICATION_JSON_VALUE)
     public ResponseEntity<List<BookListResponseDto>> findAll() {
         List<Book> bookList = bookService.findAll(Sort.by(Sort.Direction.DESC, "id"));