context: /*
   * $Id: PreferencesDialog.cs 142 2007-01-02 22:19:08Z meebey $
   * $URL: svn+ssh://svn.qnetp.net/svn/smuxi/smuxi/trunk/src/Frontend-GNOME/PreferencesDialog.cs $
   * $Rev: 142 $
   * $Author: meebey $
   * $Date: 2007-01-02 23:19:08 +0100 (Tue, 02 Jan 2007) $
   *
   * Smuxi - Smart MUltipleXed Irc
   *
   * Copyright (c) 2005-2006 Mirco Bauer <meebey@meebey.net>
   *
   * Full GPL License: <http://www.gnu.org/licenses/gpl.txt>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   */
  
  using System;
  using System.Collections.Generic;
  using Smuxi.Common;
  
  namespace Smuxi.Engine
  {
      public class ServerListController
      {
  #if LOG4NET
          private static readonly log4net.ILog _Logger = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
  #endif
          private static readonly string _LibraryTextDomain = "smuxi-engine";
          private UserConfig _UserConfig;
          
          public ServerListController(UserConfig userConfig)
          {
              if (userConfig == null) {
                  throw new ArgumentNullException("userConfig");
              }
              
              _UserConfig = userConfig;
          }
          
          public IList<ServerModel> GetServerList()
          {
              // load user servers
              string[] servers = (string[]) _UserConfig["Servers/Servers"];
              IList<ServerModel> serverList = new List<ServerModel>();
              if (servers == null) {
                  return serverList;
              }
              foreach (string server in servers) {
                  string[] serverParts = server.Split(new char[] {'/'});
                  string protocol = serverParts[0];
                  string serverId = serverParts[1];
                  ServerModel ser = GetServer(protocol, serverId);
                  if (ser == null) {
  #if LOG4NET
                      _Logger.Error("GetServerList(): GetServer(" + protocol + ", " + serverId +") returned null! ignoring...");
  #endif 
                      continue;
                  }
                  serverList.Add(ser);
              }
              return serverList;
          }
          
          public ServerModel GetServer(string protocol, string servername)
          {
              Trace.Call(protocol, servername);
              
              if (protocol == null) {
                  throw new ArgumentNullException("protocol");
              }
              if (servername == null) {
                  throw new ArgumentNullException("servername");
              }
              
              ServerModel server = new ServerModel();
              try {
                  server.Load(_UserConfig, protocol, servername);
              } catch (ArgumentException) {
                  return null;
              }
              return server;
          }
          
          public IList<string> GetNetworks()
          {
              Trace.Call();
              
              IList<string> networks = new List<string>();
              IList<ServerModel> servers = GetServerList();
              foreach (ServerModel server in servers) {
                  if (!networks.Contains(server.Network)) {
                      networks.Add(server.Network);
                  }
              }
              return networks;
          }
  
          public ServerModel GetServerByNetwork(string network)
          {
              Trace.Call(network);
  
              if (network == null) {
                  throw new ArgumentNullException("network");
              }
              if (network.Trim().Length == 0) {
                  throw new InvalidOperationException(_("Network must not be empty."));
              }
  
              var servers = GetServerList();
              foreach (var server in servers) {
                  if (String.Compare(server.Network, network, true) == 0) {
                      return server;
                  }
              }
              return null;
          }
  
          public void AddServer(ServerModel server)
          {
              Trace.Call(server);
              
              if (server == null) {
                  throw new ArgumentNullException("server");
              }
              if (String.IsNullOrEmpty(server.Hostname)) {
                  throw new InvalidOperationException(_("Server hostname must not be empty."));
              }
              if (server.Hostname.Contains("\n")) {
                  throw new InvalidOperationException(_("Server hostname contains invalid characters (newline)."));
              }
              var highestServerId = -1;
              foreach (var s in GetServerList()) {
                  if (s.Protocol == server.Protocol &&
                      s.ServerID == server.ServerID) {
                      throw new InvalidOperationException(
                          String.Format(_("Server ID '{0}' already exists."),
                                        server.ServerID)
                      );
                  }
                  int id;
                  if (Int32.TryParse(s.ServerID, out id) && id > highestServerId) {
                      highestServerId = id;
                  }
              }
              if (String.IsNullOrEmpty(server.ServerID)) {
                  server.ServerID = (++highestServerId).ToString();
              }
              server.Save(_UserConfig);
              
              string[] servers = (string[]) _UserConfig["Servers/Servers"];
              if (servers == null) {
                  servers = new string[] {};
              }
              List<string> serverList = new List<string>(servers);
              serverList.Add(server.Protocol + "/" + server.ServerID);
              _UserConfig["Servers/Servers"] = serverList.ToArray();
          }
  
          public void SetServer(ServerModel server)
          {
              Trace.Call(server);
              
              if (server == null) {
                  throw new ArgumentNullException("server");
              }
              server.Save(_UserConfig);
          }
          
          public void RemoveServer(string protocol, string servername)
          {
              Trace.Call(protocol, servername);
              
              if (protocol == null) {
                  throw new ArgumentNullException("protocol");
              }
              if (servername == null) {
                  throw new ArgumentNullException("servername");
              }
              
              string server = "Servers/" + protocol + "/" + servername + "/";
              _UserConfig.Remove(server);
  
              string[] servers = (string[]) _UserConfig["Servers/Servers"];
              if (servers == null) {
                  servers = new string[] {};
              }
              List<string> serverList = new List<string>(servers);
              int idx = serverList.IndexOf(protocol + "/" + servername);
              serverList.RemoveAt(idx);
              _UserConfig["Servers/Servers"] = serverList.ToArray();
          }
          
          public void Save()
          {
              _UserConfig.Save();
          }
  
          private static string _(string msg)
          {
  
gt:             return LibraryCatalog.GetString(msg, _LibraryTextDomain);