DataManager.cs :  » Bloggers » dasBlog » newtelligence » DasBlog » Runtime » C# / CSharp Open Source

#region Copyright (c) 2003, newtelligence AG. All rights reserved.

/*
// Copyright (c) 2003, newtelligence AG. (http://www.newtelligence.com)
// Original BlogX Source Code: Copyright (c) 2003, Chris Anderson (http://simplegeek.com)
// All rights reserved.
//  
// Redistribution and use in source and binary forms, with or without modification, are permitted 
// provided that the following conditions are met: 
//  
// (1) Redistributions of source code must retain the above copyright notice, this list of 
// conditions and the following disclaimer. 
// (2) Redistributions in binary form must reproduce the above copyright notice, this list of 
// conditions and the following disclaimer in the documentation and/or other materials 
// provided with the distribution. 
// (3) Neither the name of the newtelligence AG nor the names of its contributors may be used 
// to endorse or promote products derived from this software without specific prior 
// written permission.
//      
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS 
// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 
// IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 
// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// -------------------------------------------------------------------------
//
// Original BlogX source code (c) 2003 by Chris Anderson (http://simplegeek.com)
// 
// newtelligence is a registered trademark of newtelligence Aktiengesellschaft.
// 
// For portions of this software, the some additional copyright notices may apply 
// which can either be found in the license.txt file included in the source distribution
// or following this notice. 
//
*/

#endregion

using System;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Web;
using System.Collections;
using newtelligence.DasBlog.Util;
using System.Collections.Generic;

namespace newtelligence.DasBlog.Runtime{
  internal delegate string ResolveFileCallback(string file);

  internal class DataManager
  {
//    private static BlogCoreData coreData = null;

    private object syncDays = new Object();
    private object syncCore = new Object();
    private DayEntryCollection days;

    private long _entryChangeCount;
    private long _extraChangeCount;

    internal DateTime lastEntryUpdate = DateTime.MinValue;
    internal DateTime lastCommentUpdate = DateTime.MinValue;

    public ResolveFileCallback Resolver = null;

    public string ResolvePath(string file)
    {
      return Resolver(file);
    }

        protected class DaySorter : IComparer<DayEntry>
        {
            public int Compare(DayEntry left, DayEntry right)
            {
                return right.DateUtc.CompareTo(left.DateUtc);
            }
        }

    public DataManager()
    {
    }

    public DayEntryCollection Days
    {
      get
      {
        lock (this.syncDays)
        {
          if (this.days == null)
          {
            // Use Invariant Culture, not host culture (or user override), for date formats.

            DayEntryCollection newEntries = new DayEntryCollection();
            foreach (FileInfo fi in new DirectoryInfo(ResolvePath(".")).GetFiles("*.dayentry.xml"))
            {
              string fileName = fi.Name;
              DayEntry day = new DayEntry();

              // Ignore local DateFormatInfo (could say CCYY-DD-MM), always use CCYY-MM-DD.  #000004
              day.DateUtc = DateTime.Parse(fileName.Substring(0, fileName.Length - ".dayentry.xml".Length), CultureInfo.InvariantCulture);
              newEntries.Add(day);

              // OmarS: since we no longer have blogdata.xml to store the last
              // date we added an entry, we can update this by loading the most recent
              // day that we have stored.
              if (this.lastEntryUpdate < fi.LastWriteTimeUtc)
                this.lastEntryUpdate = fi.LastWriteTimeUtc;
            }
            newEntries.Sort(new DaySorter());
            this.days = newEntries;
          }

          return new DayEntryCollection(days);  //a shallow copy
        }
      }
    }

    public DayExtra GetDayExtra(DateTime day)
    {
      DayExtra d = new DayExtra();
      d.DateUtc = day;
      d.Load(this);
      return d;
    }

    public long CurrentEntryChangeCount
    {
      get
      {
        return _entryChangeCount;
      }
    }

    public long CurrentExtraChangeCount
    {
      get
      {
        return _extraChangeCount;
      }
    }

    public void IncrementEntryChange()
    {
      lock (syncDays)
      {
        this.days = null;
      }

      lock (syncCore)
      {
        _entryChangeCount++;
      }
    }

    public void IncrementExtraChange()
    {
      lock (syncCore)
      {
        _extraChangeCount++;
      }
    }

  }
}