maintenance.cs

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using System;
using System.Web;
using System.Web.Security;
using System.Text;
using System.Collections;
using System.Collections.Generic;
using System.Net.Mail;
using AdsDataComponentTableAdapters;
using StatsDataComponentTableAdapters;

using AspNet.StarterKits.Classifieds.Web;

namespace AspNet.StarterKits.Classifieds.BusinessLogicLayer
{

	public enum AdminNotificationSetting
	{
		None = 0,
		EachAd = 1,
		Hourly = 2,
		Daily = 3
	}

	/// <summary>
	/// Classifieds maintenance functions.
	/// </summary>
	public sealed class Maintenance
	{
		private Maintenance() { }

		public static void HourlyMaintenanceTimer(object state)
		{
			CheckAdExpirations();
			ProcessSummaryNotification();
		}

		private static string GetAdminRecipients()
		{
			// Enhancement: Cache List
			StringBuilder list = new StringBuilder();
			string[] admins = Roles.GetUsersInRole(DefaultValues.AdministratorRole);
			foreach (string username in admins)
			{
				MembershipUser u = Membership.GetUser(username);
				list.Append(u.Email);
				list.Append(",");
			}
			return list.ToString();
		}

		public static void SendAdNotification(AdsDataComponent.AdsRow ad)
		{
			SiteSettings s = SiteSettings.GetSharedSettings();

			StringBuilder messageBody = new StringBuilder();

			messageBody.AppendFormat("A new Ad has just been to the Classifieds site '{0}':", s.SiteName);
			messageBody.AppendLine();

			messageBody.AppendLine();

			messageBody.Append("Title: ");
			messageBody.AppendLine(ad.Title);

			messageBody.Append("Category: ");
			messageBody.AppendLine(ad.CategoryName);

			messageBody.AppendLine();

			messageBody.AppendLine("For Details and Activation: ");
			messageBody.Append(ClassifiedsHttpApplication.SiteUrl);
			messageBody.AppendFormat("EditAd.aspx?id={0}", ad.Id);

			messageBody.AppendLine();

			if ((AdStatus)ad.AdStatus != AdStatus.Activated)
			{
				messageBody.AppendLine("Status: The Ad is not yet active.");
			}
			else
			{
				messageBody.AppendLine("Status: The Ad was activated automatically.");
			}


			try
			{
				MailMessage m = new MailMessage(s.SiteEmailFromField, GetAdminRecipients());
				m.Subject = String.Format("New Ad posted: {0}", ad.Title);
				m.Body = messageBody.ToString();
				SmtpClient client = new SmtpClient();
				client.Send(m);
			}
			catch { }

		}

		private static void ProcessSummaryNotification()
		{
			SiteSettings s = SiteSettings.GetSharedSettings();
			DateTime lastNotification = ClassifiedsHttpApplication.LastNotificationSent;

			bool sendSummary = false;
			if (s.AdminNotification == AdminNotificationSetting.Hourly)
			{
				// the thread is called once an hour, so send the latest notifications
				sendSummary = true;
			}
			else if (s.AdminNotification == AdminNotificationSetting.Daily)
			{
				// check when the last notification was sent
				DateTime oneDayAgo = DateTime.Now.Subtract(TimeSpan.FromDays(-1));
				if (oneDayAgo >= lastNotification)
				{
					sendSummary = true;
				}
			}

			if (sendSummary)
			{
				int numPendingNew = 0, numPendingTotal = 0;
				using (StatsDataAdapter db = new StatsDataAdapter())
				{
					numPendingNew = Convert.ToInt32(db.CountAdsByStatus((int)AdStatus.ActivationPending, lastNotification));
					numPendingTotal = Convert.ToInt32(db.CountAdsByStatus((int)AdStatus.ActivationPending, null));
				}
				SendSummaryMail(numPendingNew, numPendingTotal);
				ClassifiedsHttpApplication.LastNotificationSent = DateTime.Now;
			}
		}



		private static void SendSummaryMail(int numPendingNew, int numPendingTotal)
		{
			SiteSettings s = SiteSettings.GetSharedSettings();

			// only send mail when there are pending ads to report:
			//   if reporting each hour, only send mail when there were *new* ads within the hour
			//   if reporting each day, send mail if there are *any* unactivated ads

			if (numPendingNew > 0 || (s.AdminNotification == AdminNotificationSetting.Daily && numPendingTotal > 0))
			{
				StringBuilder messageBody = new StringBuilder();
				StringBuilder recipients = new StringBuilder();

				messageBody.AppendLine("There are new Ads waiting for activation:");

				messageBody.AppendLine();

				messageBody.AppendFormat("... {0} new Ads since the last notification was sent", numPendingNew);
				messageBody.AppendLine();

				messageBody.AppendFormat("... {0} total Ads waiting for activation", numPendingTotal);
				messageBody.AppendLine();

				messageBody.AppendLine();

				messageBody.AppendLine("You can access all pending activations at:");
				messageBody.Append(ClassifiedsHttpApplication.SiteUrl);
				messageBody.Append("Admin/Activations.aspx");

				try
				{
					MailMessage m = new MailMessage(s.SiteEmailFromField, GetAdminRecipients());
					m.Subject = "Ad Notification Summary";
					m.Body = messageBody.ToString();
					SmtpClient client = new SmtpClient();
					client.Send(m);
				}
				catch { }

			}
		}

		private static void CheckAdExpirations()
		{
			AdsDataComponent.AdsDataTable ads = null;
			using (AdsDataAdapter db = new AdsDataAdapter())
			{
				DateTime expiration = DateTime.Now;
				ads = db.GetExpiredAds(expiration, (int)AdStatus.Activated);
				foreach (AdsDataComponent.AdsRow ad in ads.Rows)
				{
					db.UpdateAdStatus(ad.Id, (int)AdStatus.Inactive);
				}
			}
		}
	}
}