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using System;
using System.Collections.Generic;
using System.Text;
using XenAdmin.Model;
using XenAPI;
using XenAdmin.Actions;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Puts the treenode for the selected folder into edit mode.
    /// </summary>
    internal class PutFolderIntoRenameModeCommand : CrossConnectionCommand
    {
        /// <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 PutFolderIntoRenameModeCommand()
        {
        }

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

        public PutFolderIntoRenameModeCommand(IMainWindow mainWindow, Folder folder)
            : base(mainWindow, folder)
        {
        }

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            MainWindowCommandInterface.PutSelectedNodeIntoEditMode();
        }

        protected override bool CanExecuteCore(SelectedItemCollection selection)
        {
            return selection.ContainsOneItemOfType<Folder>(CanExecute);
        }

        private static bool CanExecute(Folder folder)
        {
            return !folder.IsRootFolder;
        }

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

        protected override List<IXenObject> GetAffectedObjects()
        {
            Folder folder = (Folder)GetSelection()[0].XenObject;
            List<IXenObject> objs = new List<IXenObject>(Folders.Descendants(folder.opaque_ref));
            objs.Add(folder);
            // Whether the folder and its descendant folders need to be operated on depends on
            // whether they're in the empty folders list on any connection. That's complicated
            // to work out, so let's just assume conservatively that they all do.
            return objs;
        }
    }
}
