購入数分、靴のストックを減らす処理を追加

src/main/java/com/example/api/ControllerExceptionHandler.java

+package com.example.api;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+import org.springframework.web.context.request.WebRequest;
+import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
+
+import com.example.domain.ErrorResponse;
+
+@RestControllerAdvice
+public class ControllerExceptionHandler extends ResponseEntityExceptionHandler{
+
+	@Override
+	protected ResponseEntity<Object> handleExceptionInternal(Exception ex, Object body, HttpHeaders headers, HttpStatus status, WebRequest request) {
+	    if (!(body instanceof ErrorResponse)) {
+	    	if(status.getReasonPhrase().equalsIgnoreCase("Method Not Allowed")){
+	    		body = new Error("URLの誤り");
+	    		status = HttpStatus.NOT_FOUND;
+	    	}
+	    }
+	    return new ResponseEntity<>(body, headers, status);
+	}
+	
+	@ExceptionHandler({Exception.class})
+	public ResponseEntity<Object> handle400(Exception ex, WebRequest request) {
+	    HttpHeaders headers = new HttpHeaders();
+	    ErrorResponse body = new ErrorResponse("これ以上購入できません");
+	    HttpStatus status = HttpStatus.BAD_REQUEST;
+
+	    return this.handleExceptionInternal(ex, body, headers, status, request);
+	}
+}
\ No newline at end of file

src/main/java/com/example/api/EcsiteRestController.java

@@ -18,13 +18,16 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.bind.annotation.SessionAttributes;
 
+import com.example.domain.BadRequestException;
 import com.example.domain.ItemData;
 import com.example.domain.Items;
+import com.example.domain.Shoes;
 import com.example.domain.User;
 import com.example.service.ItemsService;
 import com.example.service.LoginUser;
 import com.example.service.LoginUserDetailsService;
 import com.example.service.SalesLogService;
+import com.example.service.ShoesService;
 
 @RestController
 @RequestMapping("limited")
@@ -38,8 +41,11 @@ public class EcsiteRestController {
 	HttpSession session;
 	@Autowired
 	SalesLogService salesLogService;
+	@Autowired
+	ShoesService shoesService;
 	int totalPrice;
 	
+	//アカウント新規登録
 	@PostMapping("signUp")
 	public User createUser(@RequestBody User user) {
 		user.setRoles("USER");
@@ -52,28 +58,45 @@ public class EcsiteRestController {
 		return user;
 	}
 	
+	//カート追加処理
 	@PostMapping("inputCart")
-	public void inputCart(@RequestBody ItemData data, Model model) {
+	public void inputCart(@RequestBody ItemData data, Model model, Shoes shoes) {
+		//靴の在庫数を購入予定数が超えていないか確認
+		shoes = shoesService.findOne(data.getShoesId());
+		if(shoes.getStock() < data.getQuantity()){
+			throw new BadRequestException();
+		}
+		//セッションがnullの場合
 		if(session.getAttribute("cart") == null){
+			//HashMapを生成
 			LinkedHashMap<String, Items> cart = new LinkedHashMap<String, Items>();
 			String id = data.getShoesId().toString(); 
+			//HashMapに靴のIdをKeyとして、Valueに靴の情報を入れる。
 			cart.put(id , itemsService.findOne(data.getShoesId(),data.getQuantity()));
 			System.out.println(cart);
+			//HashMapをセッションに追加
 			session.setAttribute("cart", cart);
+			//カートのアイテム数をセッションに追加
 			session.setAttribute("cartValue", data.getQuantity());
+		//セッションがnull出ない場合	
 		}else{
+			//HashMapを生成
 			LinkedHashMap<String, Items> cart = new LinkedHashMap<String, Items>();
 			String id = data.getShoesId().toString();
+			//生成したHashMapにセッションにもともとある情報を照会させる。
 			cart = (LinkedHashMap<String, Items>) session.getAttribute("cart");
+			//HashMapに靴のIdをKeyとして、Valueに靴の情報を入れる。
 			cart.put(id, itemsService.findOne(data.getShoesId(),data.getQuantity()));
+			//HashMapをセッションに追加
 			session.setAttribute("cart", cart);
 			int nowQuantity =  (int) session.getAttribute("cartValue");
+			//カートのアイテム数をセッションに追加
 			session.setAttribute("cartValue", nowQuantity + data.getQuantity());
 		}
 	}
 	
 	@GetMapping("buy")
-	public void buy(@AuthenticationPrincipal LoginUser userDetails, LinkedHashMap<String, Items> items, ArrayList <Items> cart){
+	public String buy(@AuthenticationPrincipal LoginUser userDetails, LinkedHashMap<String, Items> items, ArrayList <Items> cart){
 		items = (LinkedHashMap<String, Items>) session.getAttribute("cart");
 		items.forEach((key, value) -> {
 			cart.add(value);
@@ -82,5 +105,6 @@ public class EcsiteRestController {
 		//Integer userId = user.getId();
 		salesLogService.update(1, cart);
 		session.removeAttribute("cart");
+		return "index";
 	}
 }
\ No newline at end of file

src/main/java/com/example/domain/BadRequestException.java

+package com.example.domain;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.BAD_REQUEST)
+public class BadRequestException extends RuntimeException {	
+	private static final long serialVersionUID = 1L;
+	public BadRequestException() {
+		super();
+	}
+}
\ No newline at end of file

src/main/java/com/example/domain/ErrorResponse.java

+package com.example.domain;
+
+import lombok.Value;
+
+@Value
+public class ErrorResponse {
+    //@JsonProperty("Error")
+    //private Error error;
+	private final String message;
+    /*public ErrorResponse(String message) {
+        this.error = new Error(message);
+    }
+
+    @Value
+    private class Error {
+        
+    }*/
+}
\ No newline at end of file

src/main/java/com/example/service/SalesLogService.java

@@ -5,17 +5,19 @@ import java.util.ArrayList;
 import java.util.List;
 
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.stereotype.Service;
 
 import com.example.domain.Items;
 import com.example.domain.SalesLog;
+import com.example.domain.Shoes;
 import com.example.repository.SalesLogRepository;
 
 @Service
 public class SalesLogService {
 	@Autowired
 	SalesLogRepository salesLogRepository;
+	@Autowired
+	ShoesService shoesService;
 	
 	public List<SalesLog> findAll(){
 		return salesLogRepository.findAll();
@@ -30,21 +32,24 @@ public class SalesLogService {
 	}
 	
 	public void update(Integer userId, ArrayList <Items> cart){
-		int count = 0;
 		java.util.Date d1 = new java.util.Date();
 		//d1をSQL.DATE型に変換してtodayに代入
 		java.sql.Date today = new java.sql.Date(d1.getTime());
-		System.out.println(cart.size());
+		//カートに入っている靴の種類文処理
 		for(int i = 0; i < cart.size(); i++){
+			//在庫数を購入数分減らす処理
+			Shoes shoes = new Shoes(); 
+			shoes = shoesService.findOne((cart.get(i)).getShoesId());
+			shoes.setStock(shoes.getStock() - (cart.get(i)).getQuantity());
+			shoesService.update(shoes);
+			//購入履歴に情報を追加する処理
 			SalesLog salesLog = new SalesLog();
 			salesLog.setUserId(userId);
 			salesLog.setShoesId((cart.get(i)).getShoesId());
 			salesLog.setPrice((cart.get(i)).getPrice());
 			salesLog.setCreated(today);
 			salesLogRepository.save(salesLog);
-			count++;
 		}
-		System.out.println(count);
 	}
 	
 	public List<SalesLog> history(Integer id) {