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 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met: 
 * 
 * *   Redistributions of source code must retain the above 
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 *     following disclaimer. 
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 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
 *     materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
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using System;
using System.Collections.Generic;
using System.Text;
using XenAdmin.Model;
using XenAdmin.Dialogs;
using XenAPI;
using XenAdmin.Actions;
using System.Windows.Forms;
using System.Drawing;
using XenAdmin.Properties;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Shows the edit-tags dialog for the selection.
    /// </summary>
    internal class EditTagsCommand : 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 EditTagsCommand()
        {
        }

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

        private bool CanExecute(IXenObject xenObject)
        {
            return !(xenObject is Folder) && xenObject.Connection != null;
        }

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

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            List<string> tags = new List<string>();
            List<string> indeterminateTags = new List<string>();

            Dictionary<IXenObject, List<string>> d = new Dictionary<IXenObject, List<string>>();

            foreach (SelectedItem item in selection)
            {
                d[item.XenObject] = new List<string>(Tags.GetTags(item.XenObject));
            }

            foreach (string tag in Tags.GetAllTags())
            {
                bool contained = false;
                bool notContained = false;
                foreach (IXenObject x in d.Keys)
                {
                    if (d[x].Contains(tag))
                    {
                        contained = true;
                    }
                    else
                    {
                        notContained = true;
                    }
                }

                if (contained && notContained)
                {
                    indeterminateTags.Add(tag);
                }
                else if (contained)
                {
                    tags.Add(tag);
                }
            }

            // show dialog modally
            using (NewTagDialog newTagDialog = new NewTagDialog(tags, indeterminateTags))
            {
                if (DialogResult.OK == newTagDialog.ShowDialog(Parent))
                {
                    List<AsyncAction> actions = new List<AsyncAction>();
                    foreach (IXenObject xenObject in selection.AsXenObjects())
                    {
                        // rebuild tabs lists as tags can be deleted in the dialog.
                        List<string> newTags = new List<string>(Tags.GetTags(xenObject));

                        for (int i = newTags.Count - 1; i >= 0; i--)
                        {
                            // remove any tags from this xenobject which aren't either checked or indeterminate
                            if (!newTagDialog.GetSelectedTags().Contains(newTags[i]) &&
                                !newTagDialog.GetIndeterminateTags().Contains(newTags[i]))
                            {
                                newTags.RemoveAt(i);
                            }
                        }

                        // now add any new tags
                        foreach (string t in newTagDialog.GetSelectedTags())
                        {
                            if (!newTags.Contains(t))
                            {
                                newTags.Add(t);
                            }
                        }

                        actions.Add(new GeneralEditPageAction(xenObject, xenObject.Clone(), xenObject.Path, newTags,
                            true));

                    }
                    RunMultipleActions(actions, Messages.ACTION_SAVING_TAGS_TITLE, Messages.ACTION_SAVING_TAGS_DESCRIPTION, Messages.ACTION_SAVING_TAGS_DESCRIPTION, true);
                }
            }
        }

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

        public override Image MenuImage
        {
            get
            {
                return Images.StaticImages._000_Tag_h32bit_16;
            }
        }
    }
}
