[Feat] UserIdArgumentResolver 구현(#13)

springFirstSeminar/src/main/java/org/sopt/springFirstSeminar/common/jwt/auth/HandlerMethodArgumentResolver.java

@@ -0,0 +1,14 @@
+package org.sopt.springFirstSeminar.common.jwt.auth;
+
+import org.springframework.core.MethodParameter;
+import org.springframework.lang.Nullable;
+import org.springframework.web.bind.support.WebDataBinderFactory;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.method.support.ModelAndViewContainer;
+
+public interface HandlerMethodArgumentResolver {
+    boolean supportsParameter(MethodParameter parameter);
+
+    @Nullable
+    Object resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer, NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws Exception;
+}

springFirstSeminar/src/main/java/org/sopt/springFirstSeminar/common/jwt/auth/UserId.java

@@ -0,0 +1,11 @@
+package org.sopt.springFirstSeminar.common.jwt.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 UserId {
+}

springFirstSeminar/src/main/java/org/sopt/springFirstSeminar/common/jwt/auth/UserIdArgumentResolver.java

@@ -0,0 +1,25 @@
+package org.sopt.springFirstSeminar.common.jwt.auth;
+
+import org.springframework.core.MethodParameter;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.web.bind.support.WebDataBinderFactory;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.method.support.ModelAndViewContainer;
+
+public class UserIdArgumentResolver implements HandlerMethodArgumentResolver {
+
+    //
+    @Override
+    public boolean supportsParameter(MethodParameter parameter) {
+        boolean hasUserIdAnnotation = parameter.hasParameterAnnotation(UserId.class);
+        boolean isLongType = Long.class.isAssignableFrom(parameter.getParameterType());
+        return hasUserIdAnnotation && isLongType;
+    }
+
+    @Override
+    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
+        return SecurityContextHolder.getContext()
+                .getAuthentication()
+                .getPrincipal();
+    }
+}