Conditions - Added generic 'changed' event

src/Artemis.Core/Artemis.Core.csproj.DotSettings

@@ -38,6 +38,7 @@
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=models_005Cprofile_005Cdatabindings_005Cmodifiers/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=models_005Cprofile_005Cdatabindings_005Cmodifiers_005Cabstract/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=models_005Cprofile_005Cdatamodel/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=models_005Cprofile_005Cdatamodel_005Cvaluechangedevent/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=models_005Cprofile_005Clayerproperties/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=models_005Cprofile_005Clayerproperties_005Cattributes/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=models_005Cprofile_005Clayerproperties_005Ctypes/@EntryIndexedValue">True</s:Boolean>

src/Artemis.Core/Models/Profile/Conditions/DataModelConditionEvent.cs

@@ -12,6 +12,7 @@ namespace Artemis.Core
     {
         private bool _disposed;
         private bool _reinitializing;
+        private IDataModelEvent? _valueChangedEvent;
 
         /// <summary>
         ///     Creates a new instance of the <see cref="DataModelConditionEvent" /> class
@@ -56,8 +57,11 @@ namespace Artemis.Core
             if (_disposed)
                 throw new ObjectDisposedException("DataModelConditionEvent");
 
-            if (EventPath?.GetValue() is not IDataModelEvent dataModelEvent)
+            IDataModelEvent? dataModelEvent = GetDataModelEvent();
+            if (dataModelEvent == null)
                 return false;
+            dataModelEvent.Update();
+
             // Only evaluate to true once every time the event has been triggered since the last evaluation
             if (dataModelEvent.LastTrigger <= LastTrigger)
                 return false;
@@ -86,6 +90,7 @@ namespace Artemis.Core
             EventPath?.Dispose();
             EventPath = path != null ? new DataModelPath(path) : null;
             SubscribeToEventPath();
+            CreateValueChangedEventIfNeeded();
 
             // Remove the old root group that was tied to the old data model
             ClearChildren();
@@ -100,6 +105,19 @@ namespace Artemis.Core
             {
                 EventArgumentType = null;
             }
+
+            LastTrigger = GetDataModelEvent()?.LastTrigger ?? DateTime.Now;
+        }
+
+        /// <summary>
+        ///     Returns the <see cref="IDataModelEvent" /> this <see cref="DataModelConditionEvent" /> is triggered by
+        /// </summary>
+        /// <returns>The <see cref="IDataModelEvent" /> this <see cref="DataModelConditionEvent" /> is triggered by</returns>
+        public IDataModelEvent? GetDataModelEvent()
+        {
+            if (_valueChangedEvent != null)
+                return _valueChangedEvent;
+            return EventPath?.GetValue() as IDataModelEvent;
         }
 
         #region IDisposable
@@ -153,14 +171,10 @@ namespace Artemis.Core
             if (Entity.EventPath == null)
                 return;
 
-            // Ensure the list path is valid and points to a list
             DataModelPath eventPath = new(null, Entity.EventPath);
-            // Can't check this on an invalid list, if it becomes valid later lets hope for the best
-            if (eventPath.IsValid && !PointsToEvent(eventPath))
-                return;
-
             EventPath = eventPath;
             SubscribeToEventPath();
+            CreateValueChangedEventIfNeeded();
 
             EventArgumentType = GetEventArgumentType();
             // There should only be one child and it should be a group
@@ -174,8 +188,7 @@ namespace Artemis.Core
                 AddChild(new DataModelConditionGroup(this));
             }
 
-            if (EventPath?.GetValue() is IDataModelEvent dataModelEvent)
-                LastTrigger = dataModelEvent.LastTrigger;
+            LastTrigger = GetDataModelEvent()?.LastTrigger ?? DateTime.Now;
         }
 
         private Type? GetEventArgumentType()
@@ -183,20 +196,14 @@ namespace Artemis.Core
             if (EventPath == null || !EventPath.IsValid)
                 return null;
 
+            if (_valueChangedEvent != null)
+                return _valueChangedEvent.ArgumentsType;
+
             // Cannot rely on EventPath.GetValue() because part of the path might be null
             Type eventType = EventPath.GetPropertyType()!;
             return eventType.IsGenericType ? eventType.GetGenericArguments()[0] : typeof(DataModelEventArgs);
         }
 
-        private bool PointsToEvent(DataModelPath dataModelPath)
-        {
-            Type? type = dataModelPath.GetPropertyType();
-            if (type == null)
-                return false;
-
-            return typeof(IDataModelEvent).IsAssignableFrom(type);
-        }
-
         private void SubscribeToEventPath()
         {
             if (EventPath == null) return;
@@ -204,6 +211,23 @@ namespace Artemis.Core
             EventPath.PathInvalidated += EventPathOnPathInvalidated;
         }
 
+        private void CreateValueChangedEventIfNeeded()
+        {
+            Type? propertyType = EventPath?.GetPropertyType();
+            if (propertyType == null)
+                return;
+
+            if (!typeof(IDataModelEvent).IsAssignableFrom(propertyType))
+            {
+                IDataModelEvent? instance = (IDataModelEvent?) Activator.CreateInstance(typeof(DataModelValueChangedEvent<>).MakeGenericType(propertyType), EventPath);
+                _valueChangedEvent = instance ?? throw new ArtemisCoreException("Failed to create a DataModelValueChangedEvent for a property changed data model event");
+            }
+            else
+            {
+                _valueChangedEvent = null;
+            }
+        }
+
         #region Event handlers
 
         private void EventPathOnPathValidated(object? sender, EventArgs e)

src/Artemis.Core/Models/Profile/DataModel/DataModelEvent.cs

@@ -84,6 +84,9 @@ namespace Artemis.Core
         [DataModelIgnore]
         public Type ArgumentsType => typeof(T);
 
+        /// <inheritdoc />
+        public string TriggerPastParticiple => "triggered";
+
         /// <inheritdoc />
         [DataModelIgnore]
         public bool TrackHistory
@@ -113,6 +116,11 @@ namespace Artemis.Core
             TriggerCount = 0;
             EventArgumentsHistory.Clear();
         }
+
+        /// <inheritdoc />
+        public void Update()
+        {
+        }
     }
 
     /// <summary>
@@ -192,6 +200,9 @@ namespace Artemis.Core
         [DataModelIgnore]
         public Type ArgumentsType => typeof(DataModelEventArgs);
 
+        /// <inheritdoc />
+        public string TriggerPastParticiple => "triggered";
+
         /// <inheritdoc />
         [DataModelIgnore]
         public bool TrackHistory
@@ -221,5 +232,10 @@ namespace Artemis.Core
             TriggerCount = 0;
             EventArgumentsHistory.Clear();
         }
+
+        /// <inheritdoc />
+        public void Update()
+        {
+        }
     }
 }

src/Artemis.Core/Models/Profile/DataModel/DataModelEventArgs.cs

@@ -1,4 +1,5 @@
 using System;
+using Artemis.Core.DataModelExpansions;
 
 namespace Artemis.Core
 {
@@ -10,6 +11,7 @@ namespace Artemis.Core
         /// <summary>
         ///     Gets the time at which the event with these arguments was triggered
         /// </summary>
+        [DataModelIgnore]
         public DateTime TriggerTime { get; internal set; }
     }
 }

src/Artemis.Core/Models/Profile/DataModel/IDataModelEvent.cs

@@ -3,7 +3,10 @@ using System.Collections.Generic;
 
 namespace Artemis.Core
 {
-    internal interface IDataModelEvent
+    /// <summary>
+    ///     Represents a data model event that can trigger <see cref="DataModelConditionEvent" />s.
+    /// </summary>
+    public interface IDataModelEvent
     {
         /// <summary>
         ///     Gets the last time the event was triggered
@@ -20,6 +23,11 @@ namespace Artemis.Core
         /// </summary>
         Type ArgumentsType { get; }
 
+        /// <summary>
+        ///     Gets the past participle for this event shown in the UI
+        /// </summary>
+        string TriggerPastParticiple { get; }
+
         /// <summary>
         ///     Gets or sets a boolean indicating whether the last 20 events should be tracked
         ///     <para>Note: setting this to <see langword="false" /> will clear the current history</para>
@@ -46,5 +54,11 @@ namespace Artemis.Core
         ///     Resets the trigger count and history of this data model event
         /// </summary>
         void Reset();
+
+        /// <summary>
+        ///     Updates the event, not required for standard events but included in case your custom event needs to update every
+        ///     tick
+        /// </summary>
+        void Update();
     }
 }

src/Artemis.Core/Models/Profile/DataModel/ValueChangedEvent/DataModelValueChangedEvent.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections.Generic;
+
+namespace Artemis.Core
+{
+    internal class DataModelValueChangedEvent<T> : IDataModelEvent
+    {
+        public DataModelValueChangedEvent(DataModelPath path)
+        {
+            Path = path;
+        }
+
+        public DataModelPath Path { get; }
+        public T? LastValue { get; private set; }
+        public T? CurrentValue { get; private set; }
+        public DateTime LastTrigger { get; private set; }
+        public int TriggerCount { get; private set; }
+        public Type ArgumentsType { get; } = typeof(DataModelValueChangedEventArgs<T>);
+        public string TriggerPastParticiple => "changed";
+        public bool TrackHistory { get; set; } = false;
+        public DataModelEventArgs? LastEventArgumentsUntyped { get; private set; }
+        public List<DataModelEventArgs> EventArgumentsHistoryUntyped { get; } = new();
+
+        public void Update()
+        {
+            object? value = Path.GetValue();
+            if (value != null)
+                CurrentValue = (T?) value;
+            else
+                CurrentValue = default;
+
+            if (!Equals(LastValue, CurrentValue))
+                Trigger();
+
+            LastValue = CurrentValue;
+        }
+
+        public void Reset()
+        {
+            TriggerCount = 0;
+        }
+
+        private void Trigger()
+        {
+            LastEventArgumentsUntyped = new DataModelValueChangedEventArgs<T>(CurrentValue, LastValue);
+            LastTrigger = DateTime.Now;
+            TriggerCount++;
+
+            OnEventTriggered();
+        }
+
+        #region Events
+
+        public event EventHandler? EventTriggered;
+
+        internal virtual void OnEventTriggered()
+        {
+            EventTriggered?.Invoke(this, EventArgs.Empty);
+        }
+
+        #endregion
+    }
+}

src/Artemis.Core/Models/Profile/DataModel/ValueChangedEvent/DataModelValueChangedEventArgs.cs

@@ -0,0 +1,18 @@
+using Artemis.Core.DataModelExpansions;
+
+namespace Artemis.Core
+{
+    internal class DataModelValueChangedEventArgs<T> : DataModelEventArgs
+    {
+        public DataModelValueChangedEventArgs(T? currentValue, T? previousValue)
+        {
+            CurrentValue = currentValue;
+            PreviousValue = previousValue;
+        }
+
+        [DataModelProperty(Description = "The current value of the property")]
+        public T? CurrentValue { get; }
+        [DataModelProperty(Description = "The previous value of the property")]
+        public T? PreviousValue { get; }
+    }
+}