Synnefo » Pithos MS Client

#region

/* -----------------------------------------------------------------------

 * <copyright file="DirectoryRecord.cs" company="GRNet">

 * 

 * Copyright 2011-2012 GRNET S.A. 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.

 *

 *

 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``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 GRNET S.A 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.

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 * The views and conclusions contained in the software and

 * documentation are those of the authors and should not be

 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 * </copyright>

 * -----------------------------------------------------------------------

 */

#endregion

using System;

using System.Collections;

using System.Collections.Generic;

using System.Collections.Specialized;

using System.Diagnostics;

using System.IO;

using System.Linq;

using System.Text;

using Caliburn.Micro;

using Pithos.Client.WPF.Utils;

using Pithos.Core.Agents;

using Pithos.Interfaces;

namespace Pithos.Client.WPF.SelectiveSynch

{

    [DebuggerDisplay("{Uri} : {IsChecked}")]

    public class DirectoryRecord :PropertyChangedBase, IEnumerable<DirectoryRecord>

    {

        private ObjectInfo _objectInfo;

        public ObjectInfo ObjectInfo

        {

            get { return _objectInfo; }

            set

            {

                _objectInfo = value;

                Uri = value.Uri;

            }

        }

        public Uri Uri { get; set; }

        //public DirectoryInfo LocalInfo { get; set; }

        DirectoryRecord _parent;

        public bool Added { get; set; }

        public bool Removed { get; set; }

        private bool? _isChecked=true;

        #region IsChecked

        /// <summary>

        /// Gets/sets the state of the associated UI toggle (ex. CheckBox).

        /// The return value is calculated based on the check state of all

        /// child FooViewModels.  Setting this property to true or false

        /// will set all children to the same check state, and setting it 

        /// to any value will cause the parent to verify its check state.

        /// </summary>

        public bool? IsChecked

        {

            get

            {

                if (_directories.Count==0)

                    return _isChecked;

                if (_isChecked == true)                

                    return _isChecked;

                //Check children to decide whether to display a clear (false) or gray (null)

                return _directories.Any(d => d.IsChecked == true) ? null : (bool?)false;

            }

            set { this.SetIsChecked(value, true, true); }

        }

        void SetIsChecked(bool? value, bool updateChildren, bool updateParent)

        {

            if (value == _isChecked)

                return;

            _isChecked = value;

            //If the value is null both Added and Removed should be False

            Added = _isChecked??false;

            Removed = !(_isChecked??true);

            if (updateChildren && _isChecked.HasValue)

                this.Directories.Apply(c => c.SetIsChecked(_isChecked, true, false));

            if (updateParent && _parent != null)

                _parent.VerifyCheckState();

            this.RaisePropertyChangedEventImmediately("IsChecked");

        }

        void VerifyCheckState()

        {

            bool? state = null;

            for (var i = 0; i < this.Directories.Count(); ++i)

            {

                bool? current = this.Directories.ElementAt(i).IsChecked;

                if (i == 0)

                {

                    state = current;

                }

                else if (state != current)

                {

                    state = null;

                    break;

                }

            }

            this.SetIsChecked(state, false, true);

        }

        #endregion // IsChecked

        public bool IsInitiallySelected { get; private set; }

        private List<DirectoryRecord>  _directories=new List<DirectoryRecord>();

        public List<DirectoryRecord> Directories

        {

            get { return _directories; }

            set { _directories= value; }

        }

        public DirectoryRecord()

        {

/*

             _directories = new Lazy<List<DirectoryRecord>>(() => 

                new List<DirectoryRecord>());

*/

/*

             _directories = new Lazy<List<DirectoryRecord>>(() => 

                (from directory in Info.EnumerateDirectories("*", SearchOption.TopDirectoryOnly)

                where !directory.FullName.StartsWith(ignorePath)

                select new DirectoryRecord(ignorePath) { Info = directory }).ToList());

*/

        }

        private string _displayName;

        public string DisplayName

        {

            get

            {

                if (ObjectInfo != null)

                    return ObjectInfo.Name.Split('/').Last();

                return _displayName;

            }

            set { _displayName = value; }

        }

        public bool IsExplicitlyChecked

        {

            set

            {

                _isChecked=value;

                this.RaisePropertyChangedEventImmediately("IsChecked");

            }

        }

        public DirectoryRecord(ObjectInfo info)

        {

            ObjectInfo = info;

        }

/*

        public IEnumerable<DirectoryInfo> GetCheckedDirectories()

        {

            var q = from record in this

                    where record.IsChecked==true

                    select record.Info;

            return q;

        }

*/

/*

        public void SetSelections(StringCollection selections)

        {

            IsChecked=selections.Contains(Info.FullName);                

            foreach (var children in Directories)

            {

                children.SetSelections(selections);

            }

        }

*/

        public IEnumerator<DirectoryRecord> GetEnumerator()

        {

            yield return this;

            foreach (var children in Directories)

                foreach (var info in children)

                {

                    yield return info;

                }

        }

        IEnumerator IEnumerable.GetEnumerator()

        {

            return GetEnumerator();

        }

        public override int GetHashCode()

        {

            return ObjectInfo == null

                       ? (Uri == null ? DisplayName.GetHashCode() : Uri.GetHashCode())

                       : ObjectInfo.GetHashCode();

        }

        public override bool Equals(object obj)

        {

            if (!(obj is DirectoryRecord))

                return false;

            var other = (DirectoryRecord)obj;

            if (Uri != other.Uri)

                return false;

            if (ObjectInfo== null ^ other.ObjectInfo== null)

                return false;

            if (ObjectInfo!= null && !ObjectInfo.Equals(other.ObjectInfo))

                return false;

            var thisEnum = GetEnumerator();

            var otherEnum = other.GetEnumerator();

            //Skipt the first item, it is the current node itself

            thisEnum.MoveNext();

            otherEnum.MoveNext();

            while (true)

            {

                var thisMove = thisEnum.MoveNext();

                var otherMove = otherEnum.MoveNext();

                if (thisMove ^ otherMove)

                    return false;

                if (!thisMove)

                    return true;

                if (!thisEnum.Current.Equals(otherEnum.Current))

                    return false;

            }

        }

    }

}