feat: 카카오 로그인 시 성별·생년월일 기반 유저 정보 자동 생성

package.json

@@ -41,6 +41,8 @@
     "@prisma/client": "7.2.0",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.3",
+    "cookie": "^1.1.1",
+    "cookie-parser": "^1.4.7",
     "csv-parse": "^6.1.0",
     "jsonwebtoken": "^9.0.3",
     "mariadb": "^3.4.5",
@@ -58,6 +60,8 @@
     "@nestjs/cli": "^11.0.0",
     "@nestjs/schematics": "^11.0.0",
     "@nestjs/testing": "^11.0.1",
+    "@types/cookie": "^0.6.0",
+    "@types/cookie-parser": "^1.4.10",
     "@types/express": "^5.0.0",
     "@types/jest": "^30.0.0",
     "@types/jsonwebtoken": "^9.0.10",

src/main.ts

@@ -2,7 +2,7 @@ import { HttpStatus, ValidationPipe } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { NestFactory } from '@nestjs/core';
 import type { ValidationError } from 'class-validator';
-import type { Request, NextFunction, Response } from 'express';
+import cookieParser from 'cookie-parser';
 import pinoHttp from 'pino-http';
 
 import { AppModule } from './modules/app/app.module';
@@ -25,34 +25,6 @@ function isRequiredError(errors: ValidationError[]): boolean {
   });
 }
 
-function parseCookieHeader(
-  cookieHeader: string | undefined,
-): Record<string, string> {
-  if (!cookieHeader) {
-    return {};
-  }
-
-  const decodeValue = (value: string): string => {
-    try {
-      return decodeURIComponent(value);
-    } catch {
-      return value;
-    }
-  };
-
-  return cookieHeader
-    .split(';')
-    .reduce<Record<string, string>>((acc, entry) => {
-      const [rawKey, ...valueParts] = entry.trim().split('=');
-      if (!rawKey) {
-        return acc;
-      }
-
-      acc[rawKey] = decodeValue(valueParts.join('='));
-      return acc;
-    }, {});
-}
-
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
 
@@ -79,12 +51,7 @@ async function bootstrap() {
     origin: allowedOrigins,
     credentials: true,
   });
-  type CookieRequest = Request & { cookies: Record<string, string> };
-
-  app.use((req: CookieRequest, _res: Response, next: NextFunction) => {
-    req.cookies = parseCookieHeader(req.headers.cookie);
-    next();
-  });
+  app.use(cookieParser());
 
   app.useGlobalPipes(
     new ValidationPipe({

src/modules/auth/services/kakao-auth.service.ts

@@ -5,6 +5,7 @@ import {
   AddressLevel,
   AuthProvider,
   Prisma,
+  Sex,
 } from '@prisma/client';
 import { createHash } from 'crypto';
 import type { SignOptions } from 'jsonwebtoken';
@@ -34,6 +35,9 @@ interface KakaoProfileResponse {
     profile?: {
       nickname?: string;
     };
+    gender?: string;
+    birthday?: string;
+    birthyear?: string;
   };
 }
 
@@ -76,11 +80,19 @@ export class KakaoAuthService {
     const nickname = nicknameFromProfile ?? `kakao_${providerUserId}`;
     const email =
       profile.kakao_account?.email ?? `kakao-${providerUserId}@kakao.local`;
+    const { birthdate, age } = this.buildBirthInfo(
+      profile.kakao_account?.birthyear,
+      profile.kakao_account?.birthday,
+    );
+    const sex = this.mapSex(profile.kakao_account?.gender);
 
     const userRecord = await this.upsertUser({
       providerUserId,
       nickname,
       email,
+      birthdate,
+      age,
+      sex,
     });
 
     const userId = Number(userRecord.user.id) || 0;
@@ -135,10 +147,16 @@ export class KakaoAuthService {
     providerUserId,
     nickname,
     email,
+    birthdate,
+    age,
+    sex,
   }: {
     providerUserId: string;
     nickname: string;
     email: string;
+    birthdate?: Date;
+    age?: number;
+    sex?: Sex;
   }) {
     await this.ensureDefaultAddress();
     const where = {
@@ -151,7 +169,8 @@ export class KakaoAuthService {
     try {
       const createdUser = await this.prismaService.user.create({
         data: {
-          birthdate: KakaoAuthService.DEFAULT_BIRTHDATE,
+          birthdate: birthdate ?? KakaoAuthService.DEFAULT_BIRTHDATE,
+          age: age ?? undefined,
           email,
           nickname,
           introVoiceUrl: KakaoAuthService.DEFAULT_INTRO_VOICE_URL,
@@ -160,6 +179,7 @@ export class KakaoAuthService {
           code: KakaoAuthService.DEFAULT_ADDRESS_CODE,
           provider: AuthProvider.KAKAO,
           providerUserId,
+          sex: sex ?? undefined,
           vibeVector: {},
         },
       });
@@ -175,6 +195,9 @@ export class KakaoAuthService {
           data: {
             email,
             nickname,
+            ...(birthdate ? { birthdate } : {}),
+            ...(typeof age === 'number' ? { age } : {}),
+            ...(sex ? { sex } : {}),
           },
         });
 
@@ -254,16 +277,62 @@ export class KakaoAuthService {
     }
   }
 
+  private buildBirthInfo(
+    birthyear?: string,
+    birthday?: string,
+  ): { birthdate?: Date; age?: number } {
+    if (!birthyear || !birthday || birthday.length !== 4) {
+      return {};
+    }
+
+    const year = Number(birthyear);
+    const month = Number(birthday.slice(0, 2));
+    const day = Number(birthday.slice(2));
+    if (!Number.isInteger(year) || !Number.isInteger(month)) {
+      return {};
+    }
+    if (month < 1 || month > 12 || day < 1 || day > 31) {
+      return {};
+    }
+
+    const birthdate = new Date(Date.UTC(year, month - 1, day));
+    if (Number.isNaN(birthdate.getTime())) {
+      return {};
+    }
+
+    const today = new Date();
+    const currentYear = today.getUTCFullYear();
+    const currentMonth = today.getUTCMonth() + 1;
+    const currentDay = today.getUTCDate();
+    let age = currentYear - year;
+    if (currentMonth < month || (currentMonth === month && currentDay < day)) {
+      age -= 1;
+    }
+    if (age < 0) {
+      return {};
+    }
+
+    return { birthdate, age };
+  }
+
+  private mapSex(gender?: string): Sex | undefined {
+    const normalized = gender?.toLowerCase();
+    if (normalized === 'male') {
+      return Sex.M;
+    }
+    if (normalized === 'female') {
+      return Sex.F;
+    }
+    return undefined;
+  }
+
   private isOnboardingRequired(user: {
-    birthdate: Date;
     introText: string;
     introVoiceUrl: string;
     profileImageUrl: string;
     code: string;
   }) {
     return (
-      user.birthdate.getTime() ===
-        KakaoAuthService.DEFAULT_BIRTHDATE.getTime() ||
       user.introText.trim() === '' ||
       user.introVoiceUrl === KakaoAuthService.DEFAULT_INTRO_VOICE_URL ||
       user.profileImageUrl === KakaoAuthService.DEFAULT_PROFILE_IMAGE_URL ||

src/modules/user/dtos/user-me-response.dto.ts

@@ -19,8 +19,8 @@ export class UserMeResponseDto {
   @ApiProperty({ example: 'F', enum: Sex })
   gender: Sex;
 
-  @ApiProperty({ example: '1972-03-01' })
-  birthDate: string;
+  @ApiProperty({ example: 53, description: '만 나이' })
+  age: number;
 
   @ApiProperty({ type: UserAreaDto })
   area: UserAreaDto;

src/modules/user/repositories/user.repository.ts

@@ -17,7 +17,7 @@ export class UserRepository {
         id: true,
         nickname: true,
         sex: true,
-        birthdate: true,
+        age: true,
         introText: true,
         introVoiceUrl: true,
         profileImageUrl: true,

src/modules/user/services/user/user.service.ts

@@ -32,13 +32,12 @@ export class UserService {
     const idealPersonalities = user.idealPersonalities
       .map((item) => item.personality.body)
       .filter((body): body is string => Boolean(body));
-    const birthDate = user.birthdate.toISOString().split('T')[0];
-
+    const age = user.age;
     return {
       userId: Number(user.id),
       nickname: user.nickname,
       gender: user.sex,
-      birthDate,
+      age,
       area: {
         code: user.address.code,
         name: areaName,