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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.

using System.Diagnostics;
using System.Globalization;

namespace System.Management.Automation.Help
{
    /// <summary>
    /// Updatable help system internal representation of the PSModuleInfo class.
    /// </summary>
    internal class UpdatableHelpModuleInfo
    {
#if UNIX
        internal static readonly string HelpContentZipName = "HelpContent.zip";
#else
        internal static readonly string HelpContentZipName = "HelpContent.cab";
#endif
        internal static readonly string HelpIntoXmlName = "HelpInfo.xml";

        /// <summary>
        /// Class constructor.
        /// </summary>
        /// <param name="name">Module name.</param>
        /// <param name="guid">Module GUID.</param>
        /// <param name="path">Module path.</param>
        /// <param name="uri">HelpInfo URI.</param>
        internal UpdatableHelpModuleInfo(string name, Guid guid, string path, string uri)
        {
            Debug.Assert(!string.IsNullOrEmpty(name));
            Debug.Assert(!string.IsNullOrEmpty(path));
            Debug.Assert(!string.IsNullOrEmpty(uri));

            ModuleName = name;
            _moduleGuid = guid;
            ModuleBase = path;
            HelpInfoUri = uri;
        }

        /// <summary>
        /// Module name.
        /// </summary>
        internal string ModuleName { get; }

        /// <summary>
        /// Module GUID.
        /// </summary>
        internal Guid ModuleGuid
        {
            get
            {
                return _moduleGuid;
            }
        }

        private readonly Guid _moduleGuid;

        /// <summary>
        /// Module path.
        /// </summary>
        internal string ModuleBase { get; }

        /// <summary>
        /// HelpInfo URI.
        /// </summary>
        internal string HelpInfoUri { get; }

        /// <summary>
        /// Gets the combined HelpContent.zip name.
        /// </summary>
        /// <param name="culture">Current culture.</param>
        /// <returns>HelpContent name.</returns>
        internal string GetHelpContentName(CultureInfo culture)
        {
            Debug.Assert(culture != null);

            return ModuleName + "_" + _moduleGuid.ToString() + "_" + culture.Name + "_" + HelpContentZipName;
        }

        /// <summary>
        /// Gets the combined HelpInfo.xml name.
        /// </summary>
        /// <returns>HelpInfo name.</returns>
        internal string GetHelpInfoName()
        {
            return ModuleName + "_" + _moduleGuid.ToString() + "_" + HelpIntoXmlName;
        }
    }
}