#region  --------------- Copyright Dresser Wayne Pignone -------------
/*
 * $Log: /Wrk/WayneLibraries/Wrk/Common/Assemblies.cs $
 * 
 * 4     07-07-06 9:33 Mattias.larsson
 * Fixed some FxCop issues.
 * 
 * 3     06-12-22 14:53 roger.månsson
 * Corrected last checkin
 * 
 * 2     06-12-22 13:49 roger.månsson
 * Added the GetManifestResourceStreamWithPartialName method
 */
#endregion
using System;
using System.IO;
using System.Text.RegularExpressions;

namespace Wayne.Lib
{
    /// <summary>
    /// Static help class for Assembly issues.
    /// </summary>
    public static class Assemblies
    {
        #region FilePath Methods

        /// <summary>
        /// Get the calling assembly's file path.
        /// </summary>
        /// <returns></returns>
        public static string GetFilePath()
        {
            return GetFilePath(System.Reflection.Assembly.GetCallingAssembly());
        }

        /// <summary>
        /// Get the file path of the given assembly.
        /// </summary>
        /// <param name="assembly"></param>
        /// <returns></returns>
        public static string GetFilePath(System.Reflection.Assembly assembly)
        {
            if (assembly == null)
                throw new NullReferenceException("assembly");
            return Path.GetDirectoryName(assembly.ManifestModule.FullyQualifiedName);
        }

        #endregion

        #region Resource Methods

        /// <summary>
        /// Gets a manifest resource stream from an assembly, where only the file name is known. 
        /// </summary>
        /// <param name="knownResourceNameEnd">The known file name, i.e. only the end of the Manifest resource name.</param>
        /// <param name="assemblyWithResource">The assembly that is expected to contain the resource.</param>
        /// <returns>If the resource is found, the stream is returned, otherwise null.</returns>
        public static System.IO.Stream GetManifestResourceStreamWithPartialName(string knownResourceNameEnd,
            System.Reflection.Assembly assemblyWithResource)
        {
            if (knownResourceNameEnd == null)
                throw new ArgumentNullException("knownResourceNameEnd");
            if (assemblyWithResource == null)
                throw new ArgumentNullException("assemblyWithResource");

            string[] manifestResouceNames = assemblyWithResource.GetManifestResourceNames();
            string resourceName = "";

            foreach (string candidate in manifestResouceNames)
            {
                if (candidate.EndsWith(knownResourceNameEnd, StringComparison.InvariantCultureIgnoreCase))
                {
                    resourceName = candidate;
                    break;
                }
            }

            return assemblyWithResource.GetManifestResourceStream(resourceName);
        }

        /// <summary>
        /// Gets a manifest resource stream from an assembly, using a regular expression.
        /// </summary>
        /// <param name="resourceRegEx">Regular expression for the resource name.</param>
        /// <param name="assemblyWithResource">The assembly that is expected to contain the resource.</param>
        /// <returns>If the resource is found, the stream is returned, otherwise null.</returns>
        public static System.IO.Stream GetManifestResourceStreamWithRegex(string resourceRegEx,
            System.Reflection.Assembly assemblyWithResource)
        {
            if (resourceRegEx == null)
                throw new ArgumentNullException("resourceRegEx");
            if (assemblyWithResource == null)
                throw new ArgumentNullException("assemblyWithResource");

            string[] manifestResouceNames = assemblyWithResource.GetManifestResourceNames();
            string resourceName = "";
            Regex regex = new Regex(resourceRegEx);
            foreach (string candidate in manifestResouceNames)
            {
                if (regex.IsMatch(candidate))
                {
                    resourceName = candidate;
                    break;
                }
            }

            return assemblyWithResource.GetManifestResourceStream(resourceName);
        }
        ///// <summary>
        ///// NOT IMPLEMENTED YET! Get a resource stream from the executing assembly using the resource name.
        ///// </summary>
        ///// <param name="resourceName">The name of the resource file (in the calling assembly).
        ///// Note that if the file is put under a sub-folder, the resourceName should begin
        ///// with the sub-folder's name followed by a dot (e.g. "MySubFolder.MyResource.txt").</param>
        ///// <returns></returns>
        //public static Stream GetResourceStream(string resourceName)
        //{
        //    return GetResourceStream(resourceName, System.Reflection.Assembly.GetCallingAssembly());
        //}

        ///// <summary>
        ///// NOT IMPLEMENTED YET! Get a resource stream from an assembly using the resource name.
        ///// </summary>
        ///// <param name="resourceName">The name of the resource file.
        ///// <note>Note that if the file is put under a sub-folder, the resourceName should begin
        ///// with the sub-folder's name followed by a dot (e.g. "MySubFolder.MyResource.txt").</note></param>
        ///// <param name="assembly"></param>
        ///// <returns></returns>
        //public static Stream GetResourceStream(string resourceName, System.Reflection.Assembly assembly)
        //{
        //    throw new NotImplementedException();
        //    //if (assembly == null)
        //    //    throw new NullReferenceException("assembly");

        //    //string[] x = assembly.GetManifestResourceNames();
        //    //DefaultNamespace
        //    ////Microsoft.Win32.
        //    //RootNamespace
        //    ////assembly.ManifestModule.

        //    //return assembly.GetManifestResourceStream(assembly.GetName().Name + "." + resourceName);
        //}

        #endregion
    }
}