SenseNet.Messaging.NotificationHandler.GenerateMessage C# (CSharp) Method

        private static Message GenerateMessage(Subscription subscription, Dictionary<string, NotificationConfig> configs)
        {
            if (subscription.RelatedEvents.Count == 0)
                return null;

            // we will process those content only for which no config is available. if there is no such content, we are done.
            if (!subscription.RelatedEvents.Any(e => configs[e.ContentPath] == null))
                return null;

            var template = new MessageTemplate(subscription.Language);
            var cultureInfo = CultureInfo.CreateSpecificCulture(subscription.Language);

            string subjectTemplate = null;
            switch (subscription.Frequency)
            {
                case NotificationFrequency.Immediately: subjectTemplate = template.ImmediatelySubject; break;
                case NotificationFrequency.Daily: subjectTemplate = template.DailySubject; break;
                case NotificationFrequency.Weekly: subjectTemplate = template.WeeklySubject; break;
                case NotificationFrequency.Monthly: subjectTemplate = template.MonthlySubject; break;
                default: throw GetUnknownFrequencyException(subscription.Frequency);
            }
            var subject = ReplaceParameters(subjectTemplate, subscription);

            var body = new StringBuilder();
            string headTemplate = null;
            switch (subscription.Frequency)
            {
                case NotificationFrequency.Immediately: headTemplate = template.ImmediatelyHeader; break;
                case NotificationFrequency.Daily: headTemplate = template.DailyHeader; break;
                case NotificationFrequency.Weekly: headTemplate = template.WeeklyHeader; break;
                case NotificationFrequency.Monthly: headTemplate = template.MonthlyHeader; break;
                default: throw GetUnknownFrequencyException(subscription.Frequency);
            }
            body.Append(ReplaceParameters(headTemplate, subscription));

            foreach (var @event in subscription.RelatedEvents)
            {
                // a custom config exists for this contentpath, email for that has already been processed previously
                if (configs[@event.ContentPath] != null)
                    continue;

                body.Append(ReplaceParameters(GetEventTemplate(template, @event.NotificationType), subscription.SitePath, subscription.SiteUrl, @event, cultureInfo));
            }

            string footTemplate = null;
            switch (subscription.Frequency)
            {
                case NotificationFrequency.Immediately: footTemplate = template.ImmediatelyFooter; break;
                case NotificationFrequency.Daily: footTemplate = template.DailyFooter; break;
                case NotificationFrequency.Weekly: footTemplate = template.WeeklyFooter; break;
                case NotificationFrequency.Monthly: footTemplate = template.MonthlyFooter; break;
                default: throw GetUnknownFrequencyException(subscription.Frequency);
            }
            body.Append(ReplaceParameters(footTemplate, subscription));

            return new Message
            {
                Address = subscription.UserEmail,
                Subject = subject,
                Body = body.ToString()
            };

        }