feat : OAuth2User를 Wrapping 하는 GitHubUser 구현 (#112)

src/main/java/gdsc/binaryho/imhere/security/oauth/GitHubUser.java

@@ -0,0 +1,39 @@
+package gdsc.binaryho.imhere.security.oauth;
+
+import java.util.Collection;
+import java.util.Map;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.oauth2.core.user.OAuth2User;
+
+public class GitHubUser {
+
+    public static final String GITHUB_NAME_ATTRIBUTE_KEY = "id";
+    private static final String GIT_HUB_HANDLE_ATTRIBUTE_NAME = "login";
+    private static final String GIT_HUB_AVATAR_URL_ATTRIBUTE_NAME = "avatar_url";
+
+    private final OAuth2User oAuth2User;
+
+    public GitHubUser(OAuth2User oAuth2User) {
+        this.oAuth2User = oAuth2User;
+    }
+
+    public String getId() {
+        return oAuth2User.getName();
+    }
+
+    public String getHandle() {
+        return oAuth2User.getAttribute(GIT_HUB_HANDLE_ATTRIBUTE_NAME);
+    }
+
+    public String getAvatarUrl() {
+        return oAuth2User.getAttribute(GIT_HUB_AVATAR_URL_ATTRIBUTE_NAME);
+    }
+
+    public Collection<? extends GrantedAuthority> getAuthorities() {
+        return oAuth2User.getAuthorities();
+    }
+
+    public Map<String, Object> getAttributes() {
+        return oAuth2User.getAttributes();
+    }
+}