xenadmin/XenAdmin/Commands/NewSRCommand.cs

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using System;
using System.Collections.Generic;
using System.Text;
using XenAPI;
using XenAdmin.Core;
using XenAdmin.Network;
using XenAdmin.Wizards;
using XenAdmin.Properties;
using System.Drawing;
using System.Collections.ObjectModel;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Launches the New SR Wizard.
    /// </summary>
    internal class NewSRCommand : Command
    {
        /// <summary>
        /// Initializes a new instance of this Command. The parameter-less constructor is required if 
        /// this Command is to be attached to a ToolStrip menu item or button. It should not be used in any other scenario.
        /// </summary>
        public NewSRCommand()
        {
        }

        public NewSRCommand(IMainWindow mainWindow, IEnumerable<SelectedItem> selection)
            : base(mainWindow, selection)
        {
        }

        public NewSRCommand(IMainWindow mainWindow, IXenConnection connection)
            : base(mainWindow, Helpers.GetPoolOfOne(connection))
        {
        }

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            if (selection.FirstIsStorageLink)
            {
                new NewSRWizard(null, null, (IStorageLinkObject)selection[0].XenObject).Show(Parent);
            }
            else
            {
                MainWindowCommandInterface.ShowPerConnectionWizard(selection[0].Connection, new NewSRWizard(selection[0].Connection));
            }
        }

        private static bool CanExecuteOnHost(Host host)
        {
            return host != null && host.Connection.IsConnected && !HelpersGUI.HasActiveHostAction(host);
        }

        private static bool CanExecuteOnPool(Pool pool)
        {
            return pool != null && pool.Connection.IsConnected;
        }

        protected override bool CanExecuteCore(SelectedItemCollection selection)
        {
            if (selection.Count == 1 && selection.FirstIsStorageLink)
            {
                var storageLinkObject = (IStorageLinkObject)selection[0].XenObject;

                if (storageLinkObject is StorageLinkServer || storageLinkObject is StorageLinkSystem || storageLinkObject is StorageLinkPool)
                {
                    if (storageLinkObject.StorageLinkConnection.ConnectionState == XenAdmin.Network.StorageLink.StorageLinkConnectionState.Connected)
                    {
                        foreach (IXenConnection c in ConnectionsManager.XenConnectionsCopy)
                        {
                            if (c.IsConnected && CanExecuteOnPool(Helpers.GetPool(c)) || CanExecuteOnHost(Helpers.GetMaster(c)))
                            {
                                return true;
                            }
                        }
                    }
                }
            }
            else if (selection.HostAncestor != null)
            {
                return CanExecuteOnHost(selection.HostAncestor);
            }
            else if (selection.PoolAncestor != null)
            {
                return CanExecuteOnPool(selection.PoolAncestor);
            }
            return false;
        }

        public override string MenuText
        {
            get
            {
                return Messages.MAINWINDOW_NEW_STORAGE;
            }
        }

        public override string ButtonText
        {
            get
            {
                return Messages.MAINWINDOW_NEW_STORAGE;
            }
        }

        public override Image MenuImage
        {
            get
            {
                return Resources._000_NewStorage_h32bit_16;
            }
        }

        public override Image ToolBarImage
        {
            get
            {
                return Resources._000_NewStorage_h32bit_24;
            }
        }
    }
}