/BlogEngine/DotNetSlave.BusinessLogic/Providers/XmlProvider/DataStore.cs

// --------------------------------------------------------------------------------------------------------------------

// <summary>

//   A storage provider for BlogEngine that uses XML files.

//   <remarks>

//   To build another provider, you can just copy and modify

//   this one. Then add it to the web.config's BlogEngine section.

//   </remarks>

// </summary>

// --------------------------------------------------------------------------------------------------------------------



using System.Linq;



namespace BlogEngine.Core.Providers

{

    using System.IO;

    using System.Web.Hosting;

    using System.Xml.Serialization;



    using BlogEngine.Core.DataStore;



    /// <summary>

    /// A storage provider for BlogEngine that uses XML files.

    ///     <remarks>

    /// To build another provider, you can just copy and modify

    ///         this one. Then add it to the web.config's BlogEngine section.

    ///     </remarks>

    /// </summary>

    public partial class XmlBlogProvider : BlogProvider

    {

        #region Public Methods



        /// <summary>

        /// Loads settings from generic data store

        /// </summary>

        /// <param name="extensionType">

        /// Extension Type

        /// </param>

        /// <param name="extensionId">

        /// Extension ID

        /// </param>

        /// <returns>

        /// Stream Settings

        /// </returns>

        public override object LoadFromDataStore(ExtensionType extensionType, string extensionId)

        {

            var fileName = string.Format("{0}{1}.xml", StorageLocation(extensionType), extensionId);

            Stream str = null;

            if (!Directory.Exists(StorageLocation(extensionType)))

            {

                Directory.CreateDirectory(StorageLocation(extensionType));

            }



            if (File.Exists(fileName))

            {

                var reader = new StreamReader(fileName);

                str = reader.BaseStream;

            }



            return str;

        }



        /// <summary>

        /// Removes settings from data store

        /// </summary>

        /// <param name="extensionType">

        /// Extension Type

        /// </param>

        /// <param name="extensionId">

        /// Extension Id

        /// </param>

        public override void RemoveFromDataStore(ExtensionType extensionType, string extensionId)

        {

            var fileName = string.Format("{0}{1}.xml", StorageLocation(extensionType), extensionId);

            File.Delete(fileName);

        }



        /// <summary>

        /// Save settings to generic data store

        /// </summary>

        /// <param name="extensionType">

        /// Type of extension

        /// </param>

        /// <param name="extensionId">

        /// Extension ID

        /// </param>

        /// <param name="settings">

        /// Stream Settings

        /// </param>

        public override void SaveToDataStore(ExtensionType extensionType, string extensionId, object settings)

        {

            var fileName = string.Format("{0}{1}.xml", StorageLocation(extensionType), extensionId);

            if (!Directory.Exists(StorageLocation(extensionType)))

            {

                Directory.CreateDirectory(StorageLocation(extensionType));

            }



            using (TextWriter writer = new StreamWriter(fileName))

            {

                var x = new XmlSerializer(settings.GetType());

                x.Serialize(writer, settings);

            }

        }



        #endregion



        #region Methods



        /// <summary>

        /// Data Store Location

        /// </summary>

        /// <param name="extensionType">

        /// Type of extension

        /// </param>

        /// <returns>

        /// Path to storage directory

        /// </returns>

        private static string StorageLocation(ExtensionType extensionType)

        {

            switch (extensionType)

            {

                case ExtensionType.Extension:

                    Blog blog = Blog.Blogs.FirstOrDefault(b => b.IsPrimary);

                    return

                        HostingEnvironment.MapPath(

                            Path.Combine(blog.StorageLocation, @"datastore\extensions\"));

                case ExtensionType.Widget:

                    return

                        HostingEnvironment.MapPath(

                            Path.Combine(Blog.CurrentInstance.StorageLocation, @"datastore\widgets\"));

                case ExtensionType.Theme:

                    return

                        HostingEnvironment.MapPath(

                            Path.Combine(Blog.CurrentInstance.StorageLocation, @"datastore\themes\"));

            }



            return string.Empty;

        }



        #endregion

    }

}