#region License

// Copyright (c) 2010, Jasper Yeh.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, 
// are permitted provided that the following conditions are met:
//
//    * Redistributions of source code must retain the above copyright notice, 
//      this list of conditions and the following disclaimer.
//    * 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.
//    * Neither the name of ClearCanvas Inc. 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.

#endregion

using System.Collections.Generic;
using System.Text;
using ClearCanvas.Common;
using ClearCanvas.Desktop;

namespace Nullstack.ClearCanvasEx.ViewerEx.FileOps.Utilities
{
    public class StandardFileExtensionFilter : FileExtensionFilter
    {
        public static readonly FileExtensionFilter AllFilesExtensionFilter = new StandardFileExtensionFilter(SR.szAllFilesType, "*");
        public static readonly FileExtensionFilter DicomFileExtensionFilter = new StandardFileExtensionFilter(SR.szDicomFileType, "dcm");
        public static readonly FileExtensionFilter DicomPresentationStateFileExtensionFilter = new StandardFileExtensionFilter(SR.szPresentationStateFileType, "dcm", "ps.dcm");
        public static readonly FileExtensionFilter DicomFileSetExtensionFilter = new FileExtensionFilter("DICOMDIR", SR.szDicomFileSetType);

        public StandardFileExtensionFilter(params string[] extensions)
            : base(GetFilterString(extensions), GetDescriptionString(string.Empty, extensions)) { }

        public StandardFileExtensionFilter(string name, params string[] extensions)
            : base(GetFilterString(extensions), GetDescriptionString(name, extensions)) { }

        private static string GetFilterString(ICollection<string> extensions)
        {
            Platform.CheckForNullReference(extensions, "extensions");
            Platform.CheckTrue(extensions.Count > 0, "At least one extension is required.");

            var filterBuilder = new StringBuilder();
            foreach (var extension in extensions)
                filterBuilder.AppendFormat("*.{0};", extension);
            return filterBuilder.ToString(0, filterBuilder.Length - 1);
        }

        private static string GetDescriptionString(string name, ICollection<string> extensions)
        {
            Platform.CheckForNullReference(extensions, "extensions");
            Platform.CheckTrue(extensions.Count > 0, "At least one extension is required.");

            var separator = SR.szFileTypeExtensionsSeparator;
            var extensionListBuilder = new StringBuilder();
            foreach (var extension in extensions)
                extensionListBuilder.AppendFormat("*.{0}{1}", extension, separator);
            var extensionList = extensionListBuilder.ToString(0, extensionListBuilder.Length - separator.Length);

            if (string.IsNullOrEmpty(name))
                return extensionList;
            return string.Format(SR.fFileTypeDescription, name, extensionList);
        }
    }
}