26. JWT Token Provider - Part 1 (#2)

support-portal-backend/src/main/java/net/shyshkin/study/fullstack/supportportal/backend/utility/JwtTokenProvider.java

@@ -0,0 +1,32 @@
+package net.shyshkin.study.fullstack.supportportal.backend.utility;
+
+import com.auth0.jwt.JWT;
+import com.auth0.jwt.algorithms.Algorithm;
+import net.shyshkin.study.fullstack.supportportal.backend.domain.UserPrincipal;
+import org.springframework.beans.factory.annotation.Value;
+
+import java.util.Date;
+
+import static net.shyshkin.study.fullstack.supportportal.backend.constant.SecurityConstants.*;
+
+public class JwtTokenProvider {
+
+    @Value("${app.jwt.secret}")
+    private String secret;
+
+    public String generateJwtToken(UserPrincipal userPrincipal) {
+        String[] claims = getClaimsFromUser(userPrincipal);
+        return JWT.create()
+                .withIssuer(GET_ARRAYS_LLC)
+                .withAudience(GET_ARRAYS_ADMINISTRATION)
+                .withIssuedAt(new Date())
+                .withSubject(userPrincipal.getUsername())
+                .withArrayClaim(AUTHORITIES, claims)
+                .withExpiresAt(new Date(System.currentTimeMillis() + EXPIRATION_TIME))
+                .sign(Algorithm.HMAC512(secret));
+    }
+
+    private String[] getClaimsFromUser(UserPrincipal userPrincipal) {
+        return new String[0];
+    }
+}

support-portal-backend/src/main/resources/application.yml

@@ -10,7 +10,9 @@ spring:
     properties:
       hibernate:
         dialect: org.hibernate.dialect.MySQL8Dialect
-
+app:
+  jwt:
+    secret: ${random.value}
 ---
 spring:
   config: