[#23] Feat: WebClient 외부 API 호출 메소드 작성

build.gradle

@@ -37,6 +37,7 @@ dependencies {
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 	testImplementation 'org.springframework.security:spring-security-test'
 	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+	implementation 'org.springframework.boot:spring-boot-starter-webflux'
 
 	// Swagger API
 	implementation("org.springdoc:springdoc-openapi-starter-webmvc-ui:2.0.2")

src/main/java/com/sajang/devracebackend/dto/user/SolvedResponseDto.java

@@ -0,0 +1,17 @@
+package com.sajang.devracebackend.dto.user;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class SolvedResponseDto {
+
+    private Integer solvedCount;
+
+    @Builder
+    public SolvedResponseDto(Integer solvedCount){
+        this.solvedCount = solvedCount;
+    }
+}

src/main/java/com/sajang/devracebackend/service/UserService.java

@@ -1,4 +1,7 @@
 package com.sajang.devracebackend.service;
 
+import com.sajang.devracebackend.dto.user.SolvedResponseDto;
+
 public interface UserService {
+    SolvedResponseDto checkUserSolvedCount(String bojId);
 }

src/main/java/com/sajang/devracebackend/service/impl/UserServiceImpl.java

@@ -1,13 +1,39 @@
 package com.sajang.devracebackend.service.impl;
 
+import com.sajang.devracebackend.dto.user.SolvedResponseDto;
 import com.sajang.devracebackend.repository.UserRepository;
+import com.sajang.devracebackend.response.exception.exception404.NoSuchBojIdException;
 import com.sajang.devracebackend.service.UserService;
+import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
 import org.springframework.stereotype.Service;
+import org.springframework.web.reactive.function.client.WebClient;
 
 @Service
 @RequiredArgsConstructor
 public class UserServiceImpl implements UserService {
 
     private final UserRepository userRepository;
-}
+
+    @Transactional
+    @Override
+    public SolvedResponseDto checkUserSolvedCount(String bojId){
+
+        try {
+            WebClient webClient = WebClient.builder()
+                    .baseUrl("https://solved.ac/api/v3")
+                    .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+                    .build();
+
+            return webClient.get()
+                    .uri("/user/show?handle=" + bojId)
+                    .retrieve()
+                    .bodyToMono(SolvedResponseDto.class)
+                    .block();
+        }catch (Exception e){
+            throw new NoSuchBojIdException(bojId);
+        }
+    }
+}