feat(auth) : OAuth2 인증 관련 컴포넌트 추가

놀이터(예제 코드 작성)/spring-security/src/main/kotlin/com/banjjoknim/playground/domain/auth/OAuth2UserInfo.kt

@@ -0,0 +1,12 @@
+package com.banjjoknim.playground.domain.auth
+
+interface OAuth2UserInfo {
+
+    fun getProviderId(): String
+
+    fun getProvider(): String
+
+    fun getEmail(): String
+
+    fun getName(): String
+}

놀이터(예제 코드 작성)/spring-security/src/main/kotlin/com/banjjoknim/playground/domain/auth/OAuth2UserInfos.kt

@@ -0,0 +1,56 @@
+package com.banjjoknim.playground.domain.auth
+
+class GoogleUserInfo(
+    /**
+     * DefaultOAuth2Service#loadUser(OAuth2UserRequest)
+     * ```kotlin
+     * val oAuth2User = super.loadUser(userRequest)
+     * val attributes = oAuth2User.attributes
+     * ```
+     */
+    private val attributes: Map<String, Any?>
+) : OAuth2UserInfo {
+    override fun getProviderId(): String {
+        return attributes["sub"] as String
+    }
+
+    override fun getProvider(): String {
+        return "google"
+    }
+
+    override fun getEmail(): String {
+        return attributes["email"] as String
+    }
+
+    override fun getName(): String {
+        return attributes["name"] as String
+    }
+}
+
+class FacebookUserInfo(
+    /**
+     * DefaultOAuth2Service#loadUser(OAuth2UserRequest)
+     * ```kotlin
+     * val oAuth2User = super.loadUser(userRequest)
+     * val attributes = oAuth2User.attributes
+     * ```
+     */
+    private val attributes: Map<String, Any?>
+) : OAuth2UserInfo {
+    override fun getProviderId(): String {
+        return attributes["id"] as String
+    }
+
+    override fun getProvider(): String {
+        return "facebook"
+    }
+
+    override fun getEmail(): String {
+        return attributes["email"] as String
+    }
+
+    override fun getName(): String {
+        return attributes["name"] as String
+    }
+
+}