[Feat] 구글 로그인 기능 추가

build.gradle

@@ -22,6 +22,7 @@ dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-web'
     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
     implementation 'org.springframework.boot:spring-boot-starter-validation'
+    implementation 'org.springframework.boot:spring-boot-starter-security'
 
     // MySQL
     runtimeOnly 'com.mysql:mysql-connector-j'
@@ -30,6 +31,14 @@ dependencies {
     compileOnly 'org.projectlombok:lombok'
     annotationProcessor 'org.projectlombok:lombok'
 
+    // OAuth
+    implementation 'org.springframework.boot:spring-boot-starter-oauth2-client'
+
+    // jwt
+    implementation group: 'io.jsonwebtoken', name: 'jjwt-api', version: '0.11.5'
+    implementation group: 'io.jsonwebtoken', name: 'jjwt-impl', version: '0.11.5'
+    implementation group: 'io.jsonwebtoken', name: 'jjwt-jackson', version: '0.11.5'
+
     // test
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher'

src/main/java/com/GDGoC/BaS/config/JwtTokenProvider.java

@@ -0,0 +1,31 @@
+package com.GDGoC.BaS.config;
+
+import com.GDGoC.BaS.user.User;
+import io.jsonwebtoken.Jwts;
+import io.jsonwebtoken.SignatureAlgorithm;
+import java.util.Date;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+@Component
+public class JwtTokenProvider {
+
+    @Value("${jwt.secret}")
+    private String jwtSecret;
+
+    @Value("${jwt.expiration}")
+    private long expiration;
+
+    public String generateToken(User user) {
+        Date now = new Date();
+        Date expiryDate = new Date(now.getTime() + expiration);
+
+        return Jwts.builder()
+                .setSubject(Long.toString(user.getUserId()))
+                .claim("email", user.getEmail())
+                .setIssuedAt(now)
+                .setExpiration(expiryDate)
+                .signWith(SignatureAlgorithm.HS512, jwtSecret)
+                .compact();
+    }
+}

src/main/java/com/GDGoC/BaS/user/User.java

@@ -9,13 +9,14 @@
 import com.GDGoC.BaS.clothing.UserAccessory;
 import com.GDGoC.BaS.clothing.UserHead;
 import com.GDGoC.BaS.clothing.UserTowel;
-import com.GDGoC.BaS.waterdrop.WaterdropHistory;
 import com.GDGoC.BaS.notification.Notification;
 import com.GDGoC.BaS.shower.UserRecord;
 import com.GDGoC.BaS.user.enums.Eye;
 import com.GDGoC.BaS.user.enums.Mouth;
 import com.GDGoC.BaS.user.enums.Nose;
+import com.GDGoC.BaS.user.enums.Provider;
 import com.GDGoC.BaS.user.enums.Skin;
+import com.GDGoC.BaS.waterdrop.WaterdropHistory;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.Enumerated;
@@ -26,9 +27,11 @@
 import jakarta.validation.constraints.Min;
 import java.util.ArrayList;
 import java.util.List;
+import lombok.Getter;
 import lombok.NoArgsConstructor;
 
 @Entity
+@Getter
 @NoArgsConstructor(access = PROTECTED)
 public class User {
 
@@ -67,6 +70,13 @@ public class User {
     @Column(nullable = false, length = 20)
     private Mouth mouth;
 
+    @Enumerated(STRING)
+    @Column(nullable = false)
+    private Provider provider;
+
+    @Column(nullable = false)
+    private String providerId;
+
     @OneToMany(mappedBy = "user", cascade = ALL, orphanRemoval = true)
     private List<WaterdropHistory> waterdropHistories = new ArrayList<>();
 

src/main/java/com/GDGoC/BaS/user/enums/Provider.java

@@ -0,0 +1,5 @@
+package com.GDGoC.BaS.user.enums;
+
+public enum Provider {
+    GOOGLE
+}