changed sync entries to start on startup (#344)

shared/tokenUtils.go

@@ -0,0 +1,41 @@
+package shared
+
+import (
+	"fmt"
+	"github.com/golang-jwt/jwt/v4"
+	"time"
+)
+
+func IsTokenExpired(tokenString string) (bool, error) {
+	claims, err := getTokenClaims(tokenString)
+	if err != nil {
+		return true, err
+	}
+
+	expiry := time.Unix(int64(claims["exp"].(float64)), 0)
+
+	return time.Now().After(expiry), nil
+}
+
+func GetTokenEmail(tokenString string) (string, error) {
+	claims, err := getTokenClaims(tokenString)
+	if err != nil {
+		return "", err
+	}
+
+	return claims["email"].(string), nil
+}
+
+func getTokenClaims(tokenString string) (jwt.MapClaims, error) {
+	token, _, err := new(jwt.Parser).ParseUnverified(tokenString, jwt.MapClaims{})
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse token, err: %v", err)
+	}
+
+	claims, ok := token.Claims.(jwt.MapClaims)
+	if !ok {
+		return nil, fmt.Errorf("can't convert token's claims to standard claims")
+	}
+
+	return claims, nil
+}