Move all interfaces, extents, interop and metadata to DiscImageChef.CommonTypes.

Filters.cs

@@ -0,0 +1,108 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : Filters.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Filters.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Enumerates all filters and instantiates the correct one.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     This library is distributed in the hope that it will be useful, but
+//     WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+//     Lesser General Public License for more details.
+//
+//     You should have received a copy of the GNU Lesser General Public
+//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2018 Natalia Portillo
+// ****************************************************************************/
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using DiscImageChef.CommonTypes.Interfaces;
+using DiscImageChef.Console;
+
+namespace DiscImageChef.CommonTypes
+{
+    public class FiltersList
+    {
+        public SortedDictionary<string, IFilter> Filters;
+
+        /// <summary>
+        ///     Fills the list of all known filters
+        /// </summary>
+        public FiltersList()
+        {
+            Assembly assembly = Assembly.Load("DiscImageChef.Filters");
+            Filters = new SortedDictionary<string, IFilter>();
+
+            foreach(Type type in assembly.GetTypes().Where(t => t.GetInterfaces().Contains(typeof(IFilter))))
+                try
+                {
+                    IFilter filter = (IFilter)type.GetConstructor(Type.EmptyTypes)?.Invoke(new object[] { });
+                    if(filter != null && !Filters.ContainsKey(filter.Name.ToLower()))
+                        Filters.Add(filter.Name.ToLower(), filter);
+                }
+                catch(Exception exception) { DicConsole.ErrorWriteLine("Exception {0}", exception); }
+        }
+
+        /// <summary>
+        ///     Gets the filter that allows to read the specified path
+        /// </summary>
+        /// <param name="path">Path</param>
+        /// <returns>The filter that allows reading the specified path</returns>
+        public IFilter GetFilter(string path)
+        {
+            try
+            {
+                IFilter noFilter = null;
+                foreach(IFilter filter in Filters.Values)
+                    if(filter.Id != new Guid("12345678-AAAA-BBBB-CCCC-123456789000"))
+                    {
+                        if(!filter.Identify(path)) continue;
+
+                        IFilter foundFilter =
+                            (IFilter)filter.GetType().GetConstructor(Type.EmptyTypes)?.Invoke(new object[] { });
+
+                        foundFilter?.Open(path);
+
+                        if(foundFilter?.IsOpened() == true) return foundFilter;
+                    }
+                    else
+                        noFilter = filter;
+
+                if(!noFilter?.Identify(path) == true) return noFilter;
+
+                noFilter?.Open(path);
+
+                return noFilter;
+            }
+            catch(IOException) { return null; }
+        }
+
+        /// <summary>
+        ///     Gets all known filters
+        /// </summary>
+        /// <returns>Known filters</returns>
+        public SortedDictionary<string, IFilter> GetFiltersList()
+        {
+            return Filters;
+        }
+    }
+}