Merge branch 'master' of https://twinetfs.visualstudio.com/_git/Tango

1 files changed, 320 insertions, 0 deletions

diff --git a/Software/Visual_Studio/MachineStudio/Modules/Tango.MachineStudio.DB/ViewModels/DbTableViewModel.cs b/Software/Visual_Studio/MachineStudio/Modules/Tango.MachineStudio.DB/ViewModels/DbTableViewModel.cs
new file mode 100644
index 000000000..b6d77748e
--- /dev/null
+++ b/Software/Visual_Studio/MachineStudio/Modules/Tango.MachineStudio.DB/ViewModels/DbTableViewModel.cs
@@ -0,0 +1,320 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Tango.Core.Commands;
+using Tango.DAL.Observables;
+using Tango.MachineStudio.Common.Notifications;
+using Tango.MachineStudio.DB.Managers;
+using Tango.SharedUI;
+using Tango.MachineStudio.DB.ExtensionMethods;
+using System.Data.Entity.Infrastructure;
+using GalaSoft.MvvmLight.Messaging;
+using Tango.MachineStudio.DB.Messages;
+using System.Collections.ObjectModel;
+using System.Reflection;
+using Tango.MachineStudio.Common.StudioApplication;
+using System.ComponentModel;
+
+namespace Tango.MachineStudio.DB.ViewModels
+{
+    public abstract class DbTableViewModel<T> : ViewModel, IShutdownRequestBlocker where T : class, IObservableEntity
+    {
+        private INotificationProvider _notification;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="DbTableViewModel"/> class.
+        /// </summary>
+        public DbTableViewModel(INotificationProvider notification) : base()
+        {
+            _notification = notification;
+            Adapter = ObservablesEntitiesAdapter.Instance;
+            ValidationErrors = new ObservableCollection<string>();
+
+            AddCommand = new RelayCommand(OnAdd);
+            EditCommand = new RelayCommand(OnEdit, (x) => SelectedEntity != null);
+            DeleteCommand = new RelayCommand(OnDelete, (x) => SelectedEntity != null);
+            DialogOKCommand = new RelayCommand(() => OnDialogOKPressed(DialogOpenMode, EditEntity));
+            DialogCancelCommand = new RelayCommand(() => OnDialogCancelPressed(DialogOpenMode, EditEntity));
+
+            IsDialogOpen = false;
+        }
+
+        private T _editEntity;
+        /// <summary>
+        /// Gets or sets the edit entity.
+        /// </summary>
+        public T EditEntity
+        {
+            get { return _editEntity; }
+            set { _editEntity = value; RaisePropertyChangedAuto(); }
+        }
+
+        private DialogOpenMode _dialogOpenMode;
+        /// <summary>
+        /// Gets or sets the dialog open mode.
+        /// </summary>
+        public DialogOpenMode DialogOpenMode
+        {
+            get { return _dialogOpenMode; }
+            set { _dialogOpenMode = value; RaisePropertyChangedAuto(); }
+        }
+
+        private bool _isDialogOpen;
+        /// <summary>
+        /// Gets or sets a value indicating whether this instance is dialog open.
+        /// </summary>
+        public bool IsDialogOpen
+        {
+            get { return _isDialogOpen; }
+            set { _isDialogOpen = value; RaisePropertyChangedAuto(); }
+        }
+
+        private ObservablesEntitiesAdapter _adapter;
+        /// <summary>
+        /// Gets or sets the DB adapter.
+        /// </summary>
+        public ObservablesEntitiesAdapter Adapter
+        {
+            get { return _adapter; }
+            set { _adapter = value; RaisePropertyChangedAuto(); }
+        }
+
+        private T _selectedEntity;
+        /// <summary>
+        /// Gets or sets the selected entity.
+        /// </summary>
+        public T SelectedEntity
+        {
+            get { return _selectedEntity; }
+            set { _selectedEntity = value; RaisePropertyChangedAuto(); InvalidateRelayCommands(); }
+        }
+
+        private String _filter;
+        /// <summary>
+        /// Gets or sets the search filter.
+        /// </summary>
+        public String Filter
+        {
+            get { return _filter; }
+            set { _filter = value; RaisePropertyChangedAuto(); OnFilterChanged(value); }
+        }
+
+        private ObservableCollection<String> _validationErrors;
+        /// <summary>
+        /// Gets or sets the validation errors.
+        /// </summary>
+        public ObservableCollection<String> ValidationErrors
+        {
+            get { return _validationErrors; }
+            set { _validationErrors = value; RaisePropertyChangedAuto(); }
+        }
+
+        /// <summary>
+        /// Gets or sets the dialog OK command.
+        /// </summary>
+        public RelayCommand DialogOKCommand { get; set; }
+
+        /// <summary>
+        /// Gets or sets the dialog cancel command.
+        /// </summary>
+        public RelayCommand DialogCancelCommand { get; set; }
+
+        /// <summary>
+        /// Gets or sets the add command.
+        /// </summary>
+        public RelayCommand AddCommand { get; set; }
+
+        /// <summary>
+        /// Gets or sets the edit command.
+        /// </summary>
+        public RelayCommand EditCommand { get; set; }
+
+        /// <summary>
+        /// Gets or sets the delete command.
+        /// </summary>
+        public RelayCommand DeleteCommand { get; set; }
+
+        protected override void OnValidating()
+        {
+            base.OnValidating();
+            ValidationErrors.Clear();
+
+            foreach (var prop in typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance).Where(x => !x.PropertyType.IsGenericType && x.PropertyType.IsClass && !x.Name.Contains("Guid")))
+            {
+                if (prop.GetValue(EditEntity) == null)
+                {
+                    ValidationErrors.Add(prop.Name + " is required");
+                }
+            }
+        }
+
+        /// <summary>
+        /// Called when delete command invoked.
+        /// </summary>
+        protected virtual async void OnDelete()
+        {
+            using (_notification.PushTaskItem("Saving changes to database..."))
+            {
+                var  dependenctEntities = SelectedEntity.GetDependentEntitiesNameAndGuid();
+
+                if (dependenctEntities.Count > 0)
+                {
+                    _notification.ShowError("The selected entity is being used by " + dependenctEntities.Count + " other entities." + Environment.NewLine + "Please delete any dependencies and try again." + Environment.NewLine + Environment.NewLine + String.Join(Environment.NewLine,dependenctEntities.Select(x => x.Key + ", ID: " + x.Value)));
+                    return;
+                }
+
+                try
+                {
+                    SelectedEntity.Deleted = true;
+                    await SelectedEntity.SaveAsync();
+                }
+                catch (Exception ex)
+                {
+                    SelectedEntity.Deleted = false;
+                    Adapter.Invalidate();
+                    _notification.ShowError("Could not delete entity.");
+                }
+
+                SelectedEntity = null;
+            }
+        }
+
+        /// <summary>
+        /// Called when edit command invoked.
+        /// </summary>
+        protected virtual void OnEdit()
+        {
+            ValidationErrors.Clear();
+            DialogOpenMode = DialogOpenMode.Editing;
+            EditEntity = GetEditableEntity(DialogOpenMode);
+            //_notification.ShowDialog(DialogOpenMode, this);
+            Messenger.Default.Send(new OpenEntityEditViewMessage(DialogOpenMode, this, typeof(T)));
+            IsDialogOpen = true;
+        }
+
+        /// <summary>
+        /// Called when add command invoked.
+        /// </summary>
+        protected virtual void OnAdd()
+        {
+            ValidationErrors.Clear();
+            DialogOpenMode = DialogOpenMode.Adding;
+            EditEntity = GetEditableEntity(DialogOpenMode);
+            //_notification.ShowDialog(DialogOpenMode, this);
+            Messenger.Default.Send(new OpenEntityEditViewMessage(DialogOpenMode, this, typeof(T)));
+            IsDialogOpen = true;
+        }
+
+        /// <summary>
+        /// Called when dialog closes with OK button.
+        /// </summary>
+        /// <param name="mode">The mode.</param>
+        protected virtual async void OnDialogOKPressed(DialogOpenMode mode, T entity)
+        {
+            if (!Validate()) return;
+
+            if (ValidationErrors.Count > 0) return;
+
+            Messenger.Default.Send(new CloseEntityEditViewMessage());
+
+            if (mode == DialogOpenMode.Editing)
+            {
+                entity.ShallowCopyTo(SelectedEntity);
+                entity = SelectedEntity;
+            }
+
+            OnBeforeEntitySave(mode, entity);
+
+            using (_notification.PushTaskItem("Saving changes to database..."))
+            {
+                try
+                {
+                    await entity.SaveAsync();
+                }
+                catch (DbUpdateException ex)
+                {
+                    Adapter.Invalidate();
+                    _notification.ShowError("Could not save entity." + Environment.NewLine + ex.InnerException.InnerException != null ? ex.InnerException.InnerException.Message : ex.InnerException.Message);
+                }
+                catch (Exception ex)
+                {
+                    Adapter.Invalidate();
+                    _notification.ShowError("Could not save entity." + Environment.NewLine + "Please make sure all fields are properly populated.");
+                }
+                IsDialogOpen = false;
+                SelectedEntity = EditEntity;
+                SelectedEntity = null;
+            }
+        }
+
+        /// <summary>
+        /// Called when [before entity save].
+        /// </summary>
+        /// <param name="mode">The mode.</param>
+        /// <param name="entity">The entity.</param>
+        protected virtual void OnBeforeEntitySave(DialogOpenMode mode, T entity)
+        {
+
+        }
+
+        /// <summary>
+        /// Called when dialog closes with cancel button.
+        /// </summary>
+        /// <param name="mode">The mode.</param>
+        protected virtual void OnDialogCancelPressed(DialogOpenMode mode, T entity)
+        {
+            Messenger.Default.Send(new CloseEntityEditViewMessage());
+            IsDialogOpen = false;
+        }
+
+        /// <summary>
+        /// Gets the editable entity.
+        /// </summary>
+        /// <param name="mode">The mode.</param>
+        /// <returns></returns>
+        private T GetEditableEntity(DialogOpenMode mode)
+        {
+            if (mode == DialogOpenMode.Adding)
+            {
+                var newEntity = Activator.CreateInstance<T>();
+                InitializeEntity(newEntity);
+                return newEntity;
+            }
+            else
+            {
+                return SelectedEntity.ShallowClone();
+            }
+        }
+
+        protected virtual void OnFilterChanged(String filter)
+        {
+            String viewSourceName = this.GetType().Name.Replace("ViewVM", "ViewSource");
+            ICollectionView collectionView = Adapter.GetType().GetProperty(viewSourceName).GetValue(Adapter) as ICollectionView;
+
+            collectionView.Filter = (entity) =>
+            {
+                return 
+                entity.
+                GetType().
+                GetProperties(BindingFlags.Public | BindingFlags.Instance).
+                Where(x => x.Name != "Deleted" && x.Name != "ID" && x.Name != "LastUpdated").
+                Where(x => !x.PropertyType.IsGenericType && (x.PropertyType.IsClass || x.PropertyType == typeof(String))).
+                Select(prop => prop.GetValue(entity).ToString()).
+                ToList().
+                Any(x => x.ToLower().Contains(filter.ToLower()));
+            };
+        }
+
+        protected virtual void InitializeEntity(T entity)
+        {
+
+        }
+
+        public Task<bool> OnShutdownRequest()
+        {
+            return Task.FromResult(true);
+        }
+    }
+}