refactor : 리팩터링 (#128)

* refactor : auth class

* refactor : util class

* reafactor : id to non nullable

* refactor : etcs

* fix compile err

* fix : add suppress

Author: kshired

src/main/kotlin/io/csbroker/apiserver/auth/AuthToken.kt

@@ -18,21 +18,17 @@ class AuthToken(
     private val key: Key,
 ) {
     constructor(email: String, expiry: Date, key: Key, role: String? = null) : this("", key) {
-        if (role != null) {
-            token = createAuthToken(email, expiry, role)
+        token = if (role != null) {
+            createAuthToken(email, expiry, role)
         } else {
-            token = createAuthToken(email, expiry)
+            createAuthToken(email, expiry)
         }
     }
 
     val tokenClaims: Claims?
         get() {
             try {
-                return Jwts.parserBuilder()
-                    .setSigningKey(key)
-                    .build()
-                    .parseClaimsJws(token)
-                    .body
+                return parseJwt()
             } catch (e: SecurityException) {
                 log.error("Invalid JWT signature.")
             } catch (e: MalformedJwtException) {
@@ -52,11 +48,7 @@ class AuthToken(
     val expiredTokenClaims: Claims?
         get() {
             try {
-                Jwts.parserBuilder()
-                    .setSigningKey(key)
-                    .build()
-                    .parseClaimsJws(token)
-                    .body
+                parseJwt()
             } catch (e: ExpiredJwtException) {
                 log.info("Expired JWT token.")
                 return e.claims
@@ -77,6 +69,12 @@ class AuthToken(
     val isValid: Boolean
         get() = tokenClaims != null
 
+    private fun parseJwt(): Claims? = Jwts.parserBuilder()
+        .setSigningKey(key)
+        .build()
+        .parseClaimsJws(token)
+        .body
+
     private fun createAuthToken(email: String, expiry: Date): String {
         return Jwts.builder()
             .setSubject(email)

src/main/kotlin/io/csbroker/apiserver/auth/AuthTokenProvider.kt

@@ -30,8 +30,8 @@ class AuthTokenProvider(
                 .map(::SimpleGrantedAuthority)
                 .toList()
             return UsernamePasswordAuthenticationToken(User(claims.subject, "", authorities), authToken, authorities)
-        } else {
-            throw UnAuthorizedException(ErrorCode.TOKEN_INVALID, "올바르지 않은 Token입니다.")
         }
+
+        throw UnAuthorizedException(ErrorCode.TOKEN_INVALID, "올바르지 않은 Token입니다.")
     }
 }

src/main/kotlin/io/csbroker/apiserver/auth/GithubOAuth2UserInfo.kt

@@ -2,21 +2,9 @@ package io.csbroker.apiserver.auth
 
 class GithubOAuth2UserInfo(
     attributes: MutableMap<String, Any>,
-) : OAuth2UserInfo(attributes) {
-
-    override fun getId(): String {
-        return (attributes["id"] as Int).toString()
-    }
-
-    override fun getName(): String {
-        return attributes["login"] as String
-    }
-
-    override fun getEmail(): String {
-        return attributes["email"] as String
-    }
-
-    override fun getImageUrl(): String {
-        return attributes["avatar_url"] as String
-    }
-}
+) : OAuth2UserInfo(
+    id = (attributes["id"] as Int).toString(),
+    name = attributes["login"] as String,
+    email = attributes["email"] as String,
+    imageUrl = attributes["avatar_url"] as String,
+)

src/main/kotlin/io/csbroker/apiserver/auth/GoogleOAuth2UserInfo.kt

@@ -2,21 +2,9 @@ package io.csbroker.apiserver.auth
 
 class GoogleOAuth2UserInfo(
     attributes: MutableMap<String, Any>,
-) : OAuth2UserInfo(attributes) {
-
-    override fun getId(): String {
-        return attributes["sub"] as String
-    }
-
-    override fun getName(): String {
-        return attributes["name"] as String
-    }
-
-    override fun getEmail(): String {
-        return attributes["email"] as String
-    }
-
-    override fun getImageUrl(): String {
-        return attributes["picture"] as String
-    }
-}
+) : OAuth2UserInfo(
+    id = attributes["sub"] as String,
+    name = attributes["name"] as String,
+    email = attributes["email"] as String,
+    imageUrl = attributes["picture"] as String,
+)

src/main/kotlin/io/csbroker/apiserver/auth/OAuth2UserInfo.kt

@@ -1,13 +1,8 @@
 package io.csbroker.apiserver.auth
 
 abstract class OAuth2UserInfo(
-    val attributes: MutableMap<String, Any>,
-) {
-    abstract fun getId(): String
-
-    abstract fun getName(): String
-
-    abstract fun getEmail(): String
-
-    abstract fun getImageUrl(): String
-}
+    val id: String,
+    val name: String,
+    val email: String,
+    val imageUrl: String,
+)

src/main/kotlin/io/csbroker/apiserver/auth/OAuth2UserInfoFactory.kt

@@ -8,9 +8,7 @@ class OAuth2UserInfoFactory {
             return when (providerType) {
                 ProviderType.GOOGLE -> GoogleOAuth2UserInfo(attributes)
                 ProviderType.GITHUB -> GithubOAuth2UserInfo(attributes)
-                else -> throw OAuthProviderMissMatchException(
-                    "프로바이더 타입이 일치하지 않습니다. ${providerType.name}",
-                )
+                else -> throw OAuthProviderMissMatchException("프로바이더 타입이 일치하지 않습니다. ${providerType.name}")
             }
         }
     }

src/main/kotlin/io/csbroker/apiserver/common/filter/TokenAuthenticationFilter.kt

@@ -17,7 +17,7 @@ class TokenAuthenticationFilter(
         response: HttpServletResponse,
         filterChain: FilterChain,
     ) {
-        val tokenStr = getAccessToken(request)
+        val tokenStr = request.getAccessToken()
 
         tokenStr ?: run {
             filterChain.doFilter(request, response)

src/main/kotlin/io/csbroker/apiserver/common/handler/OAuth2AuthenticationSuccessHandler.kt

@@ -88,9 +88,9 @@ class OAuth2AuthenticationSuccessHandler(
         val user = authentication.principal as OidcUser
         val userInfo = OAuth2UserInfoFactory.getOauth2UserInfo(providerType, user.attributes)
 
-        return userRepository.findByEmailOrProviderId(userInfo.getEmail(), userInfo.getId())
+        return userRepository.findByEmailOrProviderId(userInfo.email, userInfo.id)
             ?: throw EntityNotFoundException(
-                "유저를 찾을 수 없습니다. email = [${userInfo.getEmail()}], providerId = [${userInfo.getId()}] )",
+                "유저를 찾을 수 없습니다. email = [${userInfo.email}], providerId = [${userInfo.id}] )",
             )
     }
 

src/main/kotlin/io/csbroker/apiserver/common/util/CookieUtil.kt

@@ -1,5 +1,6 @@
 package io.csbroker.apiserver.common.util
 
+import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationRequest
 import org.springframework.util.SerializationUtils
 import java.util.Base64
 import javax.servlet.http.Cookie
@@ -21,19 +22,17 @@ fun addCookie(response: HttpServletResponse, name: String, value: String, maxAge
 }
 
 fun deleteCookie(request: HttpServletRequest, response: HttpServletResponse, name: String) {
-    request.cookies?.let {
-        it.find { cookie -> cookie.name == name }?.let { cookie ->
-            cookie.value = ""
-            cookie.path = "/"
-            cookie.maxAge = 0
-            response.addCookie(cookie)
-        }
+    request.cookies?.find { cookie -> cookie.name == name }?.let { cookie ->
+        cookie.value = ""
+        cookie.path = "/"
+        cookie.maxAge = 0
+        response.addCookie(cookie)
     }
 }
 
-fun serialize(obj: Any): String {
+fun OAuth2AuthorizationRequest.serialize(): String {
     return Base64.getUrlEncoder()
-        .encodeToString(SerializationUtils.serialize(obj))
+        .encodeToString(SerializationUtils.serialize(this))
 }
 
 fun <T> deserialize(cookie: Cookie, cls: Class<T>): T {

src/main/kotlin/io/csbroker/apiserver/common/util/HeaderUtil.kt

@@ -5,7 +5,7 @@ import javax.servlet.http.HttpServletRequest
 const val HEADER_AUTHORIZATION = "Authorization"
 const val TOKEN_PREFIX = "Bearer "
 
-fun getAccessToken(request: HttpServletRequest): String? {
-    val headerValue = request.getHeader(HEADER_AUTHORIZATION)
+fun HttpServletRequest.getAccessToken(): String? {
+    val headerValue = this.getHeader(HEADER_AUTHORIZATION)
     return if (headerValue?.startsWith(TOKEN_PREFIX) == true) headerValue.substring(TOKEN_PREFIX.length) else null
 }

src/main/kotlin/io/csbroker/apiserver/common/util/UuidUtil.kt

@@ -3,11 +3,9 @@ package io.csbroker.apiserver.common.util
 import java.nio.ByteBuffer
 import java.util.UUID
 
-fun uuidAsByte(uuid: UUID?): ByteArray? {
-    uuid ?: return null
-
+fun UUID.asByte(): ByteArray? {
     val byteBufferWrapper = ByteBuffer.wrap(ByteArray(16))
-    byteBufferWrapper.putLong(uuid.mostSignificantBits)
-    byteBufferWrapper.putLong(uuid.leastSignificantBits)
+    byteBufferWrapper.putLong(this.mostSignificantBits)
+    byteBufferWrapper.putLong(this.leastSignificantBits)
     return byteBufferWrapper.array()
 }

src/main/kotlin/io/csbroker/apiserver/controller/v1/post/response/PostResponseDto.kt

@@ -13,7 +13,7 @@ data class PostResponseDto(
     val comments: List<CommentResponseDto>,
 ) {
     constructor(post: Post, likeCount: Long, isLiked: Boolean, comments: List<CommentResponseDto>) : this(
-        id = post.id!!,
+        id = post.id,
         content = post.content,
         username = post.user.username,
         likeCount = likeCount,
@@ -29,7 +29,7 @@ data class CommentResponseDto(
     val createdAt: LocalDateTime,
 ) {
     constructor(comment: Comment) : this(
-        id = comment.id!!,
+        id = comment.id,
         content = comment.content,
         username = comment.user.username,
         createdAt = comment.createdAt!!,

src/main/kotlin/io/csbroker/apiserver/controller/v1/problem/ProblemController.kt

@@ -35,13 +35,10 @@ class ProblemController(
         @RequestParam("page") page: Int,
         @RequestParam("size") size: Int,
     ): ApiResponse<ProblemPageResponseDto> {
-        var solvedBy: String? = null
-
-        if (isSolved != null) {
-            solvedBy = getEmailFromSecurityContextHolder()
+        val solvedBy = isSolved?.let {
+            getEmailFromSecurityContextHolder()
                 ?: throw UnAuthorizedException(ErrorCode.FORBIDDEN, "사용자 권한이 없습니다.")
         }
-
         val searchDto = ProblemSearchDto(tags, solvedBy, isSolved, query, type, isGradable, page, size)
         val foundProblems = commonProblemService.findProblems(searchDto)
 

src/main/kotlin/io/csbroker/apiserver/controller/v2/problem/response/ShortProblemDetailResponseV2Dto.kt

@@ -1,6 +1,6 @@
 package io.csbroker.apiserver.controller.v2.problem.response
 
-class ShortProblemDetailResponseV2Dto(
+data class ShortProblemDetailResponseV2Dto(
     val id: Long,
     val title: String,
     val tags: List<String>,

src/main/kotlin/io/csbroker/apiserver/dto/problem/grade/KeywordGradingRequestDto.kt

@@ -20,13 +20,13 @@ data class KeywordGradingRequestDto(
     companion object {
         fun createKeywordGradingRequestDto(problem: LongProblem, answer: String): KeywordGradingRequestDto {
             return KeywordGradingRequestDto(
-                problem.id!!,
+                problem.id,
                 answer,
                 problem.gradingStandards.filter {
                     it.type == GradingStandardType.KEYWORD
                 }.map {
                     GradingKeyword(
-                        it.id!!,
+                        it.id,
                         it.content,
                     )
                 },

src/main/kotlin/io/csbroker/apiserver/dto/problem/grade/LongProblemGradingRequestToAiServerDto.kt

@@ -27,21 +27,21 @@ data class LongProblemGradingRequestToAiServerDto(
     companion object {
         fun createGradingRequestDto(problem: LongProblem, answer: String): LongProblemGradingRequestToAiServerDto {
             return LongProblemGradingRequestToAiServerDto(
-                problem.id!!,
+                problem.id,
                 answer,
                 problem.gradingStandards.filter {
                     it.type == GradingStandardType.KEYWORD
                 }.map {
                     GradingKeyword(
-                        it.id!!,
+                        it.id,
                         it.content,
                     )
                 },
                 problem.gradingStandards.filter {
                     it.type == GradingStandardType.CONTENT
                 }.map {
                     GradingContent(
-                        it.id!!,
+                        it.id,
                         it.content,
                     )
                 },

src/main/kotlin/io/csbroker/apiserver/dto/problem/longproblem/LongProblemGradingHistoryDto.kt

@@ -41,7 +41,7 @@ data class LongProblemGradingHistoryDto(
 
             return LongProblemGradingHistoryDto(
                 gradingHistoryId,
-                problem.id!!,
+                problem.id,
                 problem.title,
                 tags,
                 problem.description,

src/main/kotlin/io/csbroker/apiserver/dto/problem/multiplechoiceproblem/MultipleChoiceProblemGradingHistoryDto.kt

@@ -30,14 +30,14 @@ data class MultipleChoiceProblemGradingHistoryDto(
 
             val choices = problem.choicesList.map {
                 ChoiceResponseDto(
-                    it.id!!,
+                    it.id,
                     it.content,
                 )
             }
 
             return MultipleChoiceProblemGradingHistoryDto(
                 gradingHistoryId,
-                problem.id!!,
+                problem.id,
                 problem.title,
                 commonDetail.tags,
                 problem.description,

src/main/kotlin/io/csbroker/apiserver/dto/problem/shortproblem/ShortProblemGradingHistoryDto.kt

@@ -31,7 +31,7 @@ data class ShortProblemGradingHistoryDto(
 
             return ShortProblemGradingHistoryDto(
                 gradingHistoryId,
-                problem.id!!,
+                problem.id,
                 problem.title,
                 commonDetail.tags,
                 problem.description,

src/main/kotlin/io/csbroker/apiserver/dto/user/GradingStandardResponseDto.kt

@@ -12,7 +12,7 @@ data class GradingStandardResponseDto(
     companion object {
         fun fromGradingStandard(gradingStandard: GradingStandard): GradingStandardResponseDto {
             return GradingStandardResponseDto(
-                id = gradingStandard.id!!,
+                id = gradingStandard.id,
                 content = gradingStandard.content,
                 score = gradingStandard.score,
                 type = gradingStandard.type,

src/main/kotlin/io/csbroker/apiserver/dto/useranswer/UserAnswerResponseDto.kt

@@ -27,12 +27,12 @@ data class UserAnswerResponseDto(
                 .map { GradingStandardResponseDto.fromGradingStandard(it) }
 
             val selectedGradingStandards = userAnswer.userAnswerGradingStandards.map {
-                it.gradingStandard.id!!
+                it.gradingStandard.id
             }
 
             return UserAnswerResponseDto(
-                userAnswer.id!!,
-                userAnswer.problem.id!!,
+                userAnswer.id,
+                userAnswer.problem.id,
                 userAnswer.problem.title,
                 userAnswer.problem.description,
                 userAnswer.answer,

src/main/kotlin/io/csbroker/apiserver/model/Challenge.kt

@@ -16,7 +16,7 @@ class Challenge(
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "challenge_id")
-    val id: Long? = null,
+    val id: Long = 0,
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "problem_id")

src/main/kotlin/io/csbroker/apiserver/model/ChatResult.kt

@@ -13,7 +13,7 @@ class ChatResult(
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "chat_result_id")
-    val id: Long? = null,
+    val id: Long = 0,
 
     // 연관관계로 엮을 수 있으나, 단순 데이터 저장용이기 때문에.. 굳이 엮지 않겠음.
     @Column(name = "email")