using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using System.Web.Caching;

namespace WebParts //TODO: fix
{
    /// <summary>
    /// Inserts the google analysis script on the page. 
    /// The control ensures that the js file is also included on the page, i.e. don't 
    /// explicitly include it on the master page.
    /// 
    /// Note that there is only one UA code used - it is assumed that the key will remain the 
    /// same across all environments and will be separated in the GA by filters.
    /// </summary>
    public class UsageAnalysis : WebPart
    {
        string uaKey = "" // "UA-XXXXXXX-1";

        public string UAKey
        {
            get
            {
                return uaKey;
            }
            set
            {
                uaKey = value;
            }
        }

        protected override void OnLoad(EventArgs e)
        {  
			string injectionString = string.Empty;

			if (this.Page.Cache[SPContext.Current.Web.CurrentUser.LoginName] == null)
			{
				SPUser user = SPContext.Current.Web.CurrentUser;
				injectionString = ";" + user.LoginName.Substring(0, user.LoginName.IndexOf("\\"));
				foreach (SPGroup group in user.Groups)
				{
					injectionString += ";" + group.Name;
				}
				injectionString += ";";
				this.Page.Cache[SPContext.Current.Web.CurrentUser.LoginName] = injectionString;
			}

			string GA_TRACKING_SCRIPT =
				@"
				<script type=""text/javascript"">
					var gaJsHost = ((""https:"" == document.location.protocol) ? ""https://ssl."" : ""http://www."");
					document.write(unescape(""%3Cscript src='"" + gaJsHost + ""google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E""));
				</script>
				<script type=""text/javascript"">
					var pageTracker = _gat._getTracker(""{0}"");
					pageTracker._setVar(""" + injectionString + @""")
					pageTracker._trackPageview();
				</script>
				";


			Page.ClientScript.RegisterStartupScript(this.GetType(), "GoogleAnalyticsTracking", string.Format(GA_TRACKING_SCRIPT, UAKey));
        }
    }
}