/* Demo.cs
 * part of zaaReloaded2
 * 
 * Copyright 2015-2017 Daniel Kraus
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System.IO;
using Microsoft.Office.Interop.Word;

namespace zaaReloaded2.Demo
{
    /// <summary>
    /// Static class that serves to load an embedded Word document
    /// into a temporary file and open that temporary file in Word.
    /// </summary>
    static class Demo
    {
        #region Public methods

        /// <summary>
        /// Opens a demo document. The document's Saved property is set to
        /// false so that a user who wants to save changes will be prompted
        /// for a file name.
        /// </summary>
        public static void OpenDemoDocument()
        {
            string tempFile = CreateTempFileFromResource();
            Document demoDoc = Globals.ThisAddIn.Application.Documents
                .Add(Template: tempFile);
            File.Delete(tempFile);
            Globals.ThisAddIn.Ribbon.ActivateZaaTab();
        }

        #endregion

        #region Private methods

        /// <summary>
        /// Copies the built-in demo file from a resource stream to a
        /// temporary file and returns the path to that file.
        /// </summary>
        /// <returns>Path to the newly created temporary file.</returns>
        static string CreateTempFileFromResource()
        {
            string resourceName = "zaaReloaded2.Demo.Demo.docx";
            Stream resourceStream = typeof(Demo).Assembly
                .GetManifestResourceStream(resourceName);
            if (resourceStream == null)
            {
                throw new IOException("Unable to open stream " + resourceName);
            }
            string fileName = Path.GetTempFileName() + ".docx";
            Stream tempStream = File.Create(fileName);
            resourceStream.CopyTo(tempStream);
            tempStream.Close();
            return fileName;
        }

        #endregion
    }
}