SharePoint Feature to Extend SharePoint Site with AJAX 3.5 and Telerik Rad Controls

using System.Collections.Generic;
using System.Xml;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Administration;

namespace DeploymentFeature.WebConfigModification
{
    /// <summary>
    /// FeatureEventReceiver class traps the activation, deactivation, installation,
    /// or uninstallation of a Feature. 
    /// </summary>
    [System.ComponentModel.Category("1A995AC4-81CE-469B-B8C8-106019226740")] //Don't remove! This attribute is added by SPVisualDev to bind it to a WSS feature ID.
    public class FeatureEventReceiver : SPFeatureReceiver
    {
        #region Constructors

        /// <summary>
        /// Initializes a new instance of the Microsoft.SharePoint.SPFeatureReceiver class.
        /// </summary>
        public FeatureEventReceiver()
        {
        }

        #endregion // Constructors

        #region Properties

        /// <summary>
        /// Gets or sets the deployment nodes.
        /// </summary>
        /// <value>The deployment nodes.</value>
        private XmlNodeList DeploymentNodes { get; set; }

        /// <summary>
        /// Gets or sets the collection of DLLs to be installed into the GAC.
        /// </summary>
        /// <value><see cref="Dictionary"/> of dlls.</value>
        private Dictionary<string, string> DllsToGac { get; set; }

        #endregion // Properties

        #region Methods

        private void ReadDeploymentSettings(SPFeatureReceiverProperties properties)
        {
            // Open the reader with the source XML file
            XmlTextReader reader = new XmlTextReader(properties.Definition.RootDirectory + @"\..\..\LAYOUTS\WebConfigModification\DeploymentSettings\RadControlsWebConfigAdds.xml");

            // Load the source of the XML file into an XmlDocument
            XmlDocument mySourceDoc = new XmlDocument();

            // Load the source XML file into the first document
            mySourceDoc.Load(reader);

            // Close the reader
            reader.Close();

            XmlNode root = mySourceDoc.SelectSingleNode("WebConfigDeployments");

            XmlNodeList dllsToGac = root.SelectNodes("DllToGac");
            this.DeploymentNodes = root.SelectNodes("Deployment");

            this.DllsToGac = new Dictionary<string, string>();

            foreach (XmlNode dllToGac in dllsToGac)
            {
                this.DllsToGac.Add(dllToGac.Attributes["Name"].Value, dllToGac.Attributes["Folder"].Value);
            }
        }

        #endregion // Methods

        #region Events

        /// <summary>
        /// Occurs after a Feature is installed.
        /// </summary>
        /// <param name="properties">A Microsoft.SharePoint.SPFeatureReceiverProperties object that represents properties of the event handler.</param>
        public override void FeatureInstalled(SPFeatureReceiverProperties properties)
        {
        }

        /// <summary>
        /// Occurs after a Feature is activated.
        /// </summary>
        /// <param name="properties">A Microsoft.SharePoint.SPFeatureReceiverProperties object that represents properties of the event handler.</param>
        public override void FeatureActivated(SPFeatureReceiverProperties properties)
        {
            this.ReadDeploymentSettings(properties);

            SPWebApplication webApplication = properties.Feature.Parent as SPWebApplication;

            Installer installer = new Installer()
            {
                WebApplicationId = webApplication.Id,
                Nodes = this.DeploymentNodes,
                DllsToGac = this.DllsToGac
            };

            installer.Deploy(Installer.DeploymentType.Deploy);
        }

        /// <summary>
        /// Occurs when a Feature is deactivated.
        /// </summary>
        /// <param name="properties">A Microsoft.SharePoint.SPFeatureReceiverProperties object that represents properties of the event handler.</param>
        public override void FeatureDeactivating(SPFeatureReceiverProperties properties)
        {
            this.ReadDeploymentSettings(properties);

            SPWebApplication webApplication = properties.Feature.Parent as SPWebApplication;

            Installer installer = new Installer()
            {
                WebApplicationId = webApplication.Id,
                Nodes = this.DeploymentNodes,
                DllsToGac = this.DllsToGac
            };

            installer.Deploy(Installer.DeploymentType.UnDeploy);
        }

        /// <summary>
        /// Occurs when a Feature is uninstalled.
        /// </summary>
        /// <param name="properties">A Microsoft.SharePoint.SPFeatureReceiverProperties object that represents properties of the event handler.</param>
        public override void FeatureUninstalling(SPFeatureReceiverProperties properties)
        {
        }

        #endregion // Events
    }
}