From 47eea6e602948f6ef6d2d2e2e4cac8d6124bbbde Mon Sep 17 00:00:00 2001
From: toychip <dlawnsgud427@naver.com>
Date: Wed, 29 Nov 2023 15:22:26 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20JwtProvider=20-=20AccessToken=20?=
 =?UTF-8?q?=EB=B0=9C=EA=B8=89=20method=20(#7)?=
MIME-Version: 1.0
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---
 build.gradle                                  |  5 +++
 .../global/constant/OauthConstant.java        |  1 +
 .../api/TaveShot/global/jwt/JwtProvider.java  | 45 +++++++++++++++++++
 3 files changed, 51 insertions(+)
 create mode 100644 src/main/java/com/api/TaveShot/global/jwt/JwtProvider.java

diff --git a/build.gradle b/build.gradle
index e3df5c6..565227f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -35,6 +35,11 @@ dependencies {
 
 	// oauth
 	implementation 'org.springframework.boot:spring-boot-starter-oauth2-client'
+
+	// jwt
+	implementation 'io.jsonwebtoken:jjwt-api:0.11.5'
+	runtimeOnly 'io.jsonwebtoken:jjwt-impl:0.11.5'
+	runtimeOnly 'io.jsonwebtoken:jjwt-jackson:0.11.5'
 }
 
 tasks.named('bootBuildImage') {
diff --git a/src/main/java/com/api/TaveShot/global/constant/OauthConstant.java b/src/main/java/com/api/TaveShot/global/constant/OauthConstant.java
index 06f4b13..76d49e4 100644
--- a/src/main/java/com/api/TaveShot/global/constant/OauthConstant.java
+++ b/src/main/java/com/api/TaveShot/global/constant/OauthConstant.java
@@ -11,5 +11,6 @@ private OauthConstant() {
     public static final String LOGIN_PATTERN = "login";
     public static final String NAME_PATTERN = "name";
     public static final String EMAIL_PATTERN = "email";
+    public static final long ACCESS_TOKEN_VALID_TIME = 15 * 60 * 1000L;
 
 }
diff --git a/src/main/java/com/api/TaveShot/global/jwt/JwtProvider.java b/src/main/java/com/api/TaveShot/global/jwt/JwtProvider.java
new file mode 100644
index 0000000..abb282d
--- /dev/null
+++ b/src/main/java/com/api/TaveShot/global/jwt/JwtProvider.java
@@ -0,0 +1,45 @@
+package com.api.TaveShot.global.jwt;
+
+import static com.api.TaveShot.global.constant.OauthConstant.ACCESS_TOKEN_VALID_TIME;
+
+import io.jsonwebtoken.Claims;
+import io.jsonwebtoken.Jwts;
+import io.jsonwebtoken.SignatureAlgorithm;
+import io.jsonwebtoken.security.Keys;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import javax.crypto.SecretKey;
+import org.springframework.beans.factory.annotation.Value;
+
+public class JwtProvider {
+
+    @Value("${jwt.secret.key}")
+    private String SECRET_KEY;
+
+    public String generateAccessToken(String id) {
+        Claims claims = createClaims(id);
+        Date now = new Date();
+        long expiredDate = calculateExpirationDate(now);
+        SecretKey secretKey = generateKey();
+
+        return Jwts.builder()
+                .setClaims(claims)
+                .setIssuedAt(now)
+                .setExpiration(new Date(expiredDate))
+                .signWith(secretKey, SignatureAlgorithm.HS256)
+                .compact();
+    }
+
+    private Claims createClaims(String id) {
+        return Jwts.claims().setSubject(id);
+    }
+
+    private long calculateExpirationDate(Date now) {
+        return now.getTime() + ACCESS_TOKEN_VALID_TIME;
+    }
+
+    private SecretKey generateKey() {
+        return Keys.hmacShaKeyFor(SECRET_KEY.getBytes(StandardCharsets.UTF_8));
+    }
+
+}