get profile

src/main/java/io/spring/api/ProfileApi.java

@@ -0,0 +1,40 @@
+package io.spring.api;
+
+import io.spring.api.exception.ResourceNotFoundException;
+import io.spring.application.profile.ProfileData;
+import io.spring.application.profile.ProfileQueryService;
+import io.spring.core.user.User;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.HashMap;
+
+@RestController
+@RequestMapping(path = "profiles/{username}")
+public class ProfileApi {
+    private ProfileQueryService profileQueryService;
+
+    @Autowired
+    public ProfileApi(ProfileQueryService profileQueryService) {
+        this.profileQueryService = profileQueryService;
+    }
+
+    @GetMapping
+    public ResponseEntity getProfile(@PathVariable("username") String username,
+                                     @AuthenticationPrincipal User user) {
+        return profileQueryService.findByUsername(username, user)
+            .map(this::profileResponse)
+            .orElseThrow(ResourceNotFoundException::new);
+    }
+
+    private ResponseEntity profileResponse(ProfileData profile) {
+        return ResponseEntity.ok(new HashMap<String, Object>() {{
+            put("profile", profile);
+        }});
+    }
+}

src/main/java/io/spring/api/security/WebSecurityConfig.java

@@ -26,7 +26,7 @@ public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
             .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
             .authorizeRequests()
             .antMatchers(HttpMethod.POST, "/users", "/users/login").permitAll()
-            .antMatchers(HttpMethod.GET, "/articles/**").permitAll()
+            .antMatchers(HttpMethod.GET, "/articles/**", "/profiles/**").permitAll()
             .anyRequest().authenticated();
 
         http.addFilterBefore(jwtTokenFilter(), UsernamePasswordAuthenticationFilter.class);

src/main/java/io/spring/application/profile/ProfileQueryService.java

@@ -0,0 +1,36 @@
+package io.spring.application.profile;
+
+import io.spring.application.user.UserData;
+import io.spring.application.user.UserReadService;
+import io.spring.core.user.User;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import java.util.Optional;
+
+@Component
+public class ProfileQueryService {
+    private UserReadService userReadService;
+    private UserRelationshipQueryService userRelationshipQueryService;
+
+    @Autowired
+    public ProfileQueryService(UserReadService userReadService, UserRelationshipQueryService userRelationshipQueryService) {
+        this.userReadService = userReadService;
+        this.userRelationshipQueryService = userRelationshipQueryService;
+    }
+
+    public Optional<ProfileData> findByUsername(String username, User currentUser) {
+        UserData userData = userReadService.findByUsername(username);
+        if (userData == null) {
+            return Optional.empty();
+        } else {
+            ProfileData profileData = new ProfileData(
+                userData.getId(),
+                userData.getUsername(),
+                userData.getBio(),
+                userData.getImage(),
+                userRelationshipQueryService.isUserFollowing(currentUser.getId(), userData.getId()));
+            return Optional.of(profileData);
+        }
+    }
+}

src/main/java/io/spring/application/user/UserReadService.java

@@ -1,5 +1,6 @@
 package io.spring.application.user;
 
+import io.spring.application.profile.ProfileData;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
 import org.springframework.stereotype.Component;

src/main/java/io/spring/infrastructure/favorite/MyBatisArticleFavoriteRepository.java

@@ -18,7 +18,7 @@ public class MyBatisArticleFavoriteRepository implements ArticleFavoriteReposito
 
     @Override
     public void save(ArticleFavorite articleFavorite) {
-        if (mapper.find(articleFavorite.getArticleId(), articleFavorite.getUserId()) != null) {
+        if (mapper.find(articleFavorite.getArticleId(), articleFavorite.getUserId()) == null) {
             mapper.insert(articleFavorite);
         }
     }