[2단계 - 장바구니 기능] 허브(방대의) 미션 제출합니다.

README.md

@@ -1,12 +1,24 @@
 # 📄 웹 장바구니 - 요구사항
 
-## 🎁 상품
+### 🎁 상품
 
 - [x]  ID, 이름, 이미지, 가격을 가진다.
 - [x]  상품명은 100자 이하여야 한다.
 - [x]  상품 가격은 0원 이상이어야 한다.
+- [x] 상품 예외 사항
+    - [x] 존재하지 않는 상품에 대해서 수정/삭제 요청
+    - [x] 100자 이상의 상품명을 입력
+    - [x] 음수 가격을 입력
 
-## ✔️ 상품 관리 CRUD API 작성
+### 장바구니
+
+- [x]  ID, 사용자 ID, 상품 ID를 가진다.
+
+### 사용자
+
+- [x]  ID, 이메일, 비밀번호를 가진다.
+
+### ✔️ 상품 관리 CRUD API 작성
 
 - [x]  생성 기능
 - [x]  상품 조회 기능
@@ -15,21 +27,31 @@
 - [x]  수정 기능
 - [x]  삭제 기능
 
-### 📚 API
+### ✔️ 장바구니 CRUD API 작성
 
-| 기능 | Method | URL            |
-|----|--------|----------------|
-| 생성 | POST   | /products      |
-| 수정 | PATCH  | /products/{id} |
-| 삭제 | DELETE | /products/{id} |
+- [x] 장바구니에 상품 추가
+- [x] 장바구니에 담긴 상품 제거
+- [x] 장바구니 목록 조회
 
-## ✔️ 페이지 연동
+### 📚 상품 API
 
-- [x]  상품 목록 페이지 연동
-- [x]  관리자 도구 페이지 연동
+| 기능  | Method | URL            |
+|-----|--------|----------------|
+| 생성  | POST   | /products      |
+| 수정  | PATCH  | /products/{id} |
+| 삭제  | DELETE | /products/{id} |
+
+### 📚 장바구니 API
+
+| 기능  | Method | URL                 |
+|-----|--------|---------------------|
+| 생성  | POST   | /cart-products      |
+| 삭제  | DELETE | /cart-products/{id} |
+| 조회  | GET    | /cart-products      |
 
-## 🛡️ 예외 사항
+### ✔️ 페이지 연동
 
-- [x] 존재하지 않는 상품에 대해서 수정/삭제 요청
-- [x] 100자 이상의 상품명을 입력
-- [x] 음수 가격을 입력
+- [x]  상품 목록 페이지 연동
+- [x]  관리자 도구 페이지 연동
+- [x]  사용자 설정 페이지 연동
+- [x]  장바구니 페이지 연동

http-request.http

@@ -1,4 +1,5 @@
 ### 상품 추가
+
 POST http://localhost:8080/products/
 Content-Type: application/json
 
@@ -9,6 +10,7 @@ Content-Type: application/json
 }
 
 ### 상품 수정
+
 PUT http://localhost:8080/products/1
 Content-Type: application/json
 
@@ -21,3 +23,19 @@ Content-Type: application/json
 ### 상품 삭제
 
 DELETE http://localhost:8080/products/1
+
+### 장바구니 추가
+
+POST http://localhost:8080/cart-products/
+Authorization: Basic cGl6emExQHBpenphLmNvbTpwaXp6YQ==
+Content-Type: application/json
+
+{
+  "productId": 1
+}
+
+### 장바구니 조회
+
+GET http://localhost:8080/cart-products/
+Authorization: Basic cGl6emExQHBpenphLmNvbTpwaXp6YQ==
+Content-Type: application/json

src/main/java/cart/auth/Auth.java

@@ -0,0 +1,11 @@
+package cart.auth;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.PARAMETER)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Auth {
+}

src/main/java/cart/auth/AuthArgumentResolver.java

@@ -0,0 +1,35 @@
+package cart.auth;
+
+import org.springframework.core.MethodParameter;
+import org.springframework.web.bind.support.WebDataBinderFactory;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.method.support.ModelAndViewContainer;
+
+public class AuthArgumentResolver implements HandlerMethodArgumentResolver {
+
+    private final CredentialThreadLocal credentialThreadLocal;
+
+    public AuthArgumentResolver(final CredentialThreadLocal credentialThreadLocal) {
+        this.credentialThreadLocal = credentialThreadLocal;
+    }
+
+    @Override
+    public boolean supportsParameter(final MethodParameter parameter) {
+        final boolean hasParameterAnnotation = parameter.hasParameterAnnotation(Auth.class);
+        final boolean hasCredentialType = Credential.class.isAssignableFrom(parameter.getParameterType());
+        return hasParameterAnnotation && hasCredentialType;
+    }
+
+    @Override
+    public Object resolveArgument(
+            final MethodParameter parameter,
+            final ModelAndViewContainer mavContainer,
+            final NativeWebRequest webRequest,
+            final WebDataBinderFactory binderFactory
+    ) {
+        final Credential credential = credentialThreadLocal.get();
+        credentialThreadLocal.clear();
+        return credential;
+    }
+}

src/main/java/cart/auth/AuthInterceptor.java

@@ -0,0 +1,46 @@
+package cart.auth;
+
+import cart.dao.CredentialDao;
+import cart.exception.AuthenticationException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.springframework.web.servlet.HandlerInterceptor;
+
+public class AuthInterceptor implements HandlerInterceptor {
+
+    private static final String AUTHORIZATION_HEADER_NAME = "Authorization";
+
+    private final CredentialDao credentialDao;
+    private final BasicAuthorizationParser basicAuthorizationParser;
+    private final CredentialThreadLocal credentialThreadLocal;
+
+    public AuthInterceptor(
+            final CredentialDao credentialDao,
+            final BasicAuthorizationParser basicAuthorizationParser,
+            final CredentialThreadLocal credentialThreadLocal
+    ) {
+        this.credentialDao = credentialDao;
+        this.basicAuthorizationParser = basicAuthorizationParser;
+        this.credentialThreadLocal = credentialThreadLocal;
+    }
+
+    @Override
+    public boolean preHandle(
+            final HttpServletRequest request,
+            final HttpServletResponse response,
+            final Object handler
+    ) {
+        final String authorizationHeader = request.getHeader(AUTHORIZATION_HEADER_NAME);
+
+        final Credential credential = basicAuthorizationParser.parse(authorizationHeader);
+        final Credential savedCredential = credentialDao.findByEmail(credential.getEmail())
+                .orElseThrow(() -> new AuthenticationException("올바르지 않은 이메일입니다. 입력값: " + credential.getEmail()));
+
+        if (credential.isNotSamePassword(savedCredential)) {
+            throw new AuthenticationException();
+        }
+
+        credentialThreadLocal.set(savedCredential);
+        return true;
+    }
+}

src/main/java/cart/auth/BasicAuthorizationParser.java

@@ -0,0 +1,43 @@
+package cart.auth;
+
+import cart.exception.InvalidBasicCredentialException;
+import java.util.Base64;
+import org.springframework.stereotype.Component;
+
+@Component
+public class BasicAuthorizationParser {
+
+    private static final String KEYWORD = "Basic ";
+    private static final String DELIMITER = ":";
+    private static final int VALID_CREDENTIAL_SIZE = 2;
+    private static final int EMAIL_INDEX = 0;
+    private static final int PASSWORD_INDEX = 1;
+    private static final String EMPTY = "";
+
+    public Credential parse(final String authorizationHeader) {
+        final String[] credential = parseCredential(authorizationHeader);
+        if (isInvalidBasicCredential(authorizationHeader)) {
+            throw new InvalidBasicCredentialException(authorizationHeader);
+        }
+        return new Credential(credential[EMAIL_INDEX], credential[PASSWORD_INDEX]);
+    }
+
+    private String[] parseCredential(final String authorizationHeader) {
+        final String credential = authorizationHeader.replace(KEYWORD, EMPTY);
+        return decodeBase64(credential).split(DELIMITER);
+    }
+
+    private String decodeBase64(final String credential) {
+        try {
+            return new String(Base64.getDecoder().decode(credential));
+        } catch (final IllegalArgumentException e) {
+            throw new InvalidBasicCredentialException(credential);
+        }
+    }
+
+    private boolean isInvalidBasicCredential(final String authorizationHeader) {
+        return !authorizationHeader.startsWith(KEYWORD) ||
+                parseCredential(authorizationHeader).length != VALID_CREDENTIAL_SIZE;
+    }
+}
+

src/main/java/cart/auth/Credential.java

@@ -0,0 +1,37 @@
+package cart.auth;
+
+import org.springframework.lang.Nullable;
+
+public class Credential {
+
+    private final Long memberId;
+    private final String email;
+    private final String password;
+
+    public Credential(final String email, final String password) {
+        this(null, email, password);
+    }
+
+    public Credential(final Long memberId, final String email, final String password) {
+        this.memberId = memberId;
+        this.email = email;
+        this.password = password;
+    }
+
+    public boolean isNotSamePassword(final Credential credential) {
+        return !this.password.equals(credential.getPassword());
+    }
+
+    @Nullable
+    public Long getMemberId() {
+        return memberId;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+}

src/main/java/cart/auth/CredentialThreadLocal.java

@@ -0,0 +1,21 @@
+package cart.auth;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class CredentialThreadLocal {
+
+    private final ThreadLocal<Credential> local = new ThreadLocal<>();
+
+    public void set(final Credential credential) {
+        local.set(credential);
+    }
+
+    public Credential get() {
+        return local.get();
+    }
+
+    public void clear() {
+        local.remove();
+    }
+}

src/main/java/cart/config/WebConfiguration.java

@@ -0,0 +1,45 @@
+package cart.config;
+
+import cart.auth.AuthArgumentResolver;
+import cart.auth.AuthInterceptor;
+import cart.auth.BasicAuthorizationParser;
+import cart.auth.CredentialThreadLocal;
+import cart.dao.CredentialDao;
+import java.util.List;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class WebConfiguration implements WebMvcConfigurer {
+
+    private final CredentialDao credentialDao;
+    private final BasicAuthorizationParser basicAuthorizationParser;
+    private final CredentialThreadLocal credentialThreadLocal;
+
+    public WebConfiguration(
+            final CredentialDao credentialDao,
+            final BasicAuthorizationParser basicAuthorizationParser,
+            final CredentialThreadLocal credentialThreadLocal
+    ) {
+        this.credentialDao = credentialDao;
+        this.basicAuthorizationParser = basicAuthorizationParser;
+        this.credentialThreadLocal = credentialThreadLocal;
+    }
+
+    @Override
+    public void addInterceptors(final InterceptorRegistry registry) {
+        final AuthInterceptor authInterceptor = new AuthInterceptor(
+                credentialDao,
+                basicAuthorizationParser,
+                credentialThreadLocal
+        );
+        registry.addInterceptor(authInterceptor).addPathPatterns("/cart-products/**");
+    }
+
+    @Override
+    public void addArgumentResolvers(final List<HandlerMethodArgumentResolver> resolvers) {
+        resolvers.add(new AuthArgumentResolver(credentialThreadLocal));
+    }
+}