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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="HandBrakeLanguagesHelper.cs" company="HandBrake Project (http://handbrake.fr)">
//   This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
//   Contains utilities for converting language codes.
// </summary>
// --------------------------------------------------------------------------------------------------------------------

namespace HandBrake.Interop
{
    using System.Collections.Generic;

    using HandBrake.Interop.HbLib;
    using HandBrake.Interop.Helpers;
    using HandBrake.Interop.Model;

    /// <summary>
	/// Contains utilities for converting language codes.
	/// </summary>
	public static class Languages
	{
		/// <summary>
		/// The list of all languages.
		/// </summary>
		private static IList<Language> allLanguages; 

		/// <summary>
		/// Gets a list of all languages.
		/// </summary>
		public static IList<Language> AllLanguages
		{
			get
			{
			    return allLanguages
			           ?? (allLanguages =
                           InteropUtilities.ToListFromIterator<iso639_lang_t, Language>(HBFunctions.lang_get_next, HandBrakeUnitConversionHelpers.NativeToLanguage));
			}
		}

		/// <summary>
		/// Gets the language object for the given code.
		/// </summary>
		/// <param name="code">The ISO-639-2 code for the language.</param>
		/// <returns>Object that describes the language.</returns>
		public static Language Get(string code)
		{
			iso639_lang_t language = InteropUtilities.ToStructureFromPtr<iso639_lang_t>(HBFunctions.lang_for_code2(code));
            return HandBrakeUnitConversionHelpers.NativeToLanguage(language);
		}
	}
}