feat: setup config (viper =)), jwt settings && session struct

pkg/jwt/claims.go

@@ -0,0 +1,9 @@
+package jwt
+
+import jwt2 "github.com/golang-jwt/jwt/v5"
+
+type UserClaims struct {
+	jwt2.RegisteredClaims
+	UserID   uint
+	Sections []string
+}

pkg/jwt/jwt.go

@@ -0,0 +1,37 @@
+package jwt
+
+import (
+	"errors"
+
+	jwt2 "github.com/golang-jwt/jwt/v5"
+)
+
+const UserClaimKey = "User-Claims"
+
+func CreateToken(secret []byte, claims *UserClaims) (string, error) {
+	return jwt2.NewWithClaims(jwt2.SigningMethodHS512, claims).SignedString(secret)
+}
+
+func ParseToken(tokenString string, secret []byte) (*UserClaims, error) {
+	token, err := jwt2.ParseWithClaims(tokenString, &UserClaims{}, func(t *jwt2.Token) (interface{}, error) {
+		return secret, nil
+	})
+
+	var claim *UserClaims
+	if token.Claims != nil {
+		cc, ok := token.Claims.(*UserClaims)
+		if ok {
+			claim = cc
+		}
+	}
+
+	if err != nil {
+		return claim, err
+	}
+
+	if !token.Valid {
+		return claim, errors.New("token is not valid")
+	}
+
+	return claim, nil
+}