private string Format(BookingTemplate template, string fileContent, ref User user,
                              ref Event @event)
        {
            var    content      = fileContent;
            var    root         = Configuration.ServerDomain;
            string mainIconPath = null;

            content = content.Replace("{{facebook_url}}", Configuration.FacebookUrl);
            content = content.Replace("{{facebook_icon}}", Path.Combine(root, "images/facebook.svg"));

            content = content.Replace("{{instagram_url}}", Configuration.InstagramUrl);
            content = content.Replace("{{instagram_icon}}", Path.Combine(root, "images/instagram.svg"));

            content = content.Replace("{{twitter_url}}", Configuration.TwitterUrl);
            content = content.Replace("{{twitter_icon}}", Path.Combine(root, "images/twitter.svg"));

            content = content.Replace("{{ynov_url}}", Configuration.YnovUrl);

            content = content.Replace("{{logo}}", Path.Combine(root, "images/logo.png"));

            content = content.Replace("{{user_firstname}}", user.FirstName);
            content = content.Replace("{{event_name}}", @event.Title);

            mainIconPath = "images/" + template.ToString().ToLower() + ".png";

            switch (template)
            {
            case BookingTemplate.AWAY:
                break;

            case BookingTemplate.PRESENT:
                content = content.Replace("{{jurypoint_number}}", (@event.JuryPoint ?? 0).ToString());
                break;

            case BookingTemplate.RECALL:
                string remain = TimeFormatter.GetTimeWindowFrom(DateTime.Now, (DateTime)@event.OpenAt);
                content = content.Replace("{{remaining_hours}}", remain);
                AddEventInfos(ref content, ref @event);
                break;

            case BookingTemplate.AUTO_VALIDATED:
                mainIconPath = "images/validate.png";
                AddEventInfos(ref content, ref @event);
                break;

            case BookingTemplate.SUBSCRIPTION_VALIDATED:
                mainIconPath = "images/validate.png";
                AddEventInfos(ref content, ref @event);
                break;

            case BookingTemplate.PENDING_VALIDATION:
                content = content.Replace("{{subscribed_at}}", DateTime.Now.ToString());
                break;
            }

            content = content.Replace("{{main_icon}}", Path.Combine(root, mainIconPath));

            content = content.Replace(System.Environment.NewLine, "");

            return(content);
        }