zaaReloaded2/zaaReloaded2/ViewModels/PreferencesViewModel.cs

/* PreferencesViewModel.cs
 * part of zaaReloaded2
 * 
 * Copyright 2015-2018 Daniel Kraus
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Bovender.Mvvm;
using Bovender.Mvvm.ViewModels;

namespace zaaReloaded2.ViewModels
{
    /// <summary>
    /// View model for zaaReloaded2.Preferences.
    /// </summary>
    public class PreferencesViewModel : ViewModelBase
    {
        #region Properties

        public bool SuppressItemCommentInteraction
        {
            get
            {
                return _suppressCommentInteraction;
            }
            set
            {
                if (value != _suppressCommentInteraction)
                {
                    _suppressCommentInteraction = value;
                    OnPropertyChanged("SuppressItemCommentInteraction");
                }
            }
        }

        public bool EnableLogging
        {
            get
            {
                return _enableLogging;
            }
            set
            {
                if (value != _enableLogging)
                {
                    _enableLogging = value;
                    OnPropertyChanged("EnableLogging");
                }
            }
        }

        public string LogFolder
        {
            get
            {
                return LogFile.Default.LogFolder;
            }
        }

        #endregion

        #region Command

        public DelegatingCommand SaveCommand
        {
            get
            {
                if (_saveCommand == null)
                {
                    _saveCommand = new DelegatingCommand(
                        param => DoSave(),
                        param => CanSave());
                }
                return _saveCommand;
            }
        }

        public DelegatingCommand OpenLogFolderCommand
        {
            get
            {
                if (_openLogFolderCommand == null)
                {
                    _openLogFolderCommand = new DelegatingCommand(
                        param => DoOpenLogFolder(),
                        param => CanOpenLogFolder());
                }
                return _openLogFolderCommand;
            }
        }

        #endregion

        #region Constructor

        public PreferencesViewModel()
        {
            _suppressCommentInteraction = UserSettings.Default.SuppressItemCommentInteraction;
            _enableLogging = UserSettings.Default.EnableLogging;
            PropertyChanged += (sender, args) =>
            {
                _dirty = true;
            };
        }

        #endregion

        #region Private methods

        void DoSave()
        {
            if (_dirty)
            {
                UserSettings.Default.SuppressItemCommentInteraction = SuppressItemCommentInteraction;
                UserSettings.Default.EnableLogging = EnableLogging;
            }
            DoCloseView();
        }

        bool CanSave()
        {
            return _dirty;
        }

        void DoOpenLogFolder()
        {
            if (CanOpenLogFolder())
            {
                System.Diagnostics.Process.Start(LogFolder);
                if (!_dirty)
                {
                    CloseViewCommand.Execute(null);
                }
            }
        }

        bool CanOpenLogFolder()
        {
            return !String.IsNullOrEmpty(LogFolder);
        }

        #endregion

        #region Fields

        DelegatingCommand _saveCommand;
        DelegatingCommand _openLogFolderCommand;
        bool _dirty;
        bool _enableLogging;
        bool _suppressCommentInteraction;

        #endregion

        #region ViewModelBase implementation

        public override object RevealModelObject()
        {
            return UserSettings.Default;
        }

        #endregion
    }
}