Display conditions - Implemented expression tree creation

Display conditions - Use the most appropriate number input
UI general - Use current localisation for decimal seperators and enfore in inputs

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

@@ -34,14 +34,6 @@ namespace Artemis.Core.Models.Profile.Conditions
         /// </summary>
         public abstract string Icon { get; }
 
-        /// <summary>
-        ///     Creates a binary expression comparing two types
-        /// </summary>
-        /// <param name="leftSideType">The type of parameter passed to the left side of the expression</param>
-        /// <param name="rightSideType">The type of parameter passed to the right side of the expression</param>
-        /// <returns></returns>
-        public abstract BinaryExpression CreateExpression(Type leftSideType, Type rightSideType);
-
         internal void Register(PluginInfo pluginInfo, IDataModelService dataModelService)
         {
             if (_registered)
@@ -78,5 +70,13 @@ namespace Artemis.Core.Models.Profile.Conditions
                 return true;
             return CompatibleTypes.Any(t => t.IsCastableFrom(type));
         }
+
+        /// <summary>
+        ///     Creates a binary expression comparing two types
+        /// </summary>
+        /// <param name="leftSide">The parameter on the left side of the expression</param>
+        /// <param name="rightSide">The parameter on the right side of the expression</param>
+        /// <returns></returns>
+        public abstract BinaryExpression CreateExpression(Expression leftSide, Expression rightSide);
     }
 }

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

@@ -1,5 +1,9 @@
 using System;
+using System.Linq;
+using System.Linq.Expressions;
 using Artemis.Core.Models.Profile.Conditions.Abstract;
+using Artemis.Core.Plugins.Abstract.DataModels;
+using Artemis.Core.Services.Interfaces;
 
 namespace Artemis.Core.Models.Profile.Conditions
 {
@@ -10,10 +14,88 @@ namespace Artemis.Core.Models.Profile.Conditions
 
         public Guid LeftDataModelGuid { get; set; }
         public string LeftPropertyPath { get; set; }
-        
+
         public Guid RightDataModelGuid { get; set; }
         public string RightPropertyPath { get; set; }
+
+        // TODO: Implement type-checking or perhaps convert it here
         public object RightStaticValue { get; set; }
+
+        public Expression<Func<DataModel, DataModel, bool>> DynamicConditionLambda { get; private set; }
+        public Func<DataModel, DataModel, bool> CompiledDynamicConditionLambda { get; private set; }
+        public Expression<Func<DataModel, bool>> StaticConditionLambda { get; private set; }
+        public Func<DataModel, bool> CompiledStaticConditionLambda { get; private set; }
+
+        public void CreateExpression(IDataModelService dataModelService)
+        {
+            if (PredicateType == PredicateType.Dynamic)
+                CreateDynamicExpression(dataModelService);
+            else
+                CreateStaticExpression(dataModelService);
+        }
+
+        private void CreateDynamicExpression(IDataModelService dataModelService)
+        {
+            if (LeftDataModelGuid == Guid.Empty || string.IsNullOrWhiteSpace(LeftPropertyPath))
+                return;
+            if (RightDataModelGuid == Guid.Empty || string.IsNullOrWhiteSpace(RightPropertyPath))
+                return;
+
+            var leftDataModel = dataModelService.GetPluginDataModelByGuid(LeftDataModelGuid);
+            if (leftDataModel == null)
+                return;
+
+            var rightDataModel = dataModelService.GetPluginDataModelByGuid(RightDataModelGuid);
+            if (rightDataModel == null)
+                return;
+
+            var leftSideParameter = Expression.Parameter(typeof(DataModel), "leftDataModel");
+            var leftSideAccessor = LeftPropertyPath.Split('.').Aggregate<string, Expression>(
+                Expression.Convert(leftSideParameter, leftDataModel.GetType()), // Cast to the appropriate type
+                Expression.Property
+            );
+            var rightSideParameter = Expression.Parameter(typeof(DataModel), "rightDataModel");
+            var rightSideAccessor = RightPropertyPath.Split('.').Aggregate<string, Expression>(
+                Expression.Convert(rightSideParameter, rightDataModel.GetType()), // Cast to the appropriate type
+                Expression.Property
+            );
+
+            // A conversion may be required if the types differ
+            // This can cause issues if the DisplayConditionOperator wasn't accurate in it's supported types but that is not a concern here
+            if (rightSideAccessor.Type != leftSideAccessor.Type)
+                rightSideAccessor = Expression.Convert(rightSideAccessor, leftSideAccessor.Type);
+
+            var dynamicConditionExpression = Operator.CreateExpression(leftSideAccessor, rightSideAccessor);
+
+            DynamicConditionLambda = Expression.Lambda<Func<DataModel, DataModel, bool>>(dynamicConditionExpression, leftSideParameter, rightSideParameter);
+            CompiledDynamicConditionLambda = DynamicConditionLambda.Compile();
+        }
+
+        private void CreateStaticExpression(IDataModelService dataModelService)
+        {
+            if (LeftDataModelGuid == Guid.Empty || string.IsNullOrWhiteSpace(LeftPropertyPath))
+                return;
+
+            var leftDataModel = dataModelService.GetPluginDataModelByGuid(LeftDataModelGuid);
+            if (leftDataModel == null)
+                return;
+
+            var leftSideParameter = Expression.Parameter(typeof(DataModel), "leftDataModel");
+            var leftSideAccessor = LeftPropertyPath.Split('.').Aggregate<string, Expression>(
+                Expression.Convert(leftSideParameter, leftDataModel.GetType()), // Cast to the appropriate type
+                Expression.Property
+            );
+
+            // If the left side is a value type but the input is empty, this isn't a valid expression
+            if (leftSideAccessor.Type.IsValueType && RightStaticValue == null)
+                return;
+
+            var rightSideConstant = Expression.Constant(RightStaticValue);
+            var conditionExpression = Operator.CreateExpression(leftSideAccessor, rightSideConstant);
+
+            StaticConditionLambda = Expression.Lambda<Func<DataModel, bool>>(conditionExpression, leftSideParameter);
+            CompiledStaticConditionLambda = StaticConditionLambda.Compile();
+        }
     }
 
     public enum PredicateType

src/Artemis.Core/Models/Profile/Conditions/Operators/EqualsConditionOperator.cs

@@ -11,11 +11,9 @@ namespace Artemis.Core.Models.Profile.Conditions.Operators
         public override string Description => "Equals";
         public override string Icon => "Equal";
 
-        public override BinaryExpression CreateExpression(Type leftSideType, Type rightSideType)
+        public override BinaryExpression CreateExpression(Expression leftSide, Expression rightSide)
         {
-            var leftSideParameter = Expression.Parameter(leftSideType, "a");
-            var rightSideParameter = Expression.Parameter(rightSideType, "b");
-            return Expression.Equal(leftSideParameter, rightSideParameter);
+            return Expression.Equal(leftSide, rightSide);
         }
     }
 }

src/Artemis.Core/Models/Profile/Conditions/Operators/GreaterThanConditionOperator.cs

@@ -11,11 +11,9 @@ namespace Artemis.Core.Models.Profile.Conditions.Operators
         public override string Description => "Is greater than";
         public override string Icon => "GreaterThan";
 
-        public override BinaryExpression CreateExpression(Type leftSideType, Type rightSideType)
+        public override BinaryExpression CreateExpression(Expression leftSide, Expression rightSide)
         {
-            var leftSideParameter = Expression.Parameter(leftSideType, "a");
-            var rightSideParameter = Expression.Parameter(rightSideType, "b");
-            return Expression.GreaterThan(leftSideParameter, rightSideParameter);
+            return Expression.GreaterThan(leftSide, rightSide);
         }
     }
 }

src/Artemis.Core/Models/Profile/Conditions/Operators/GreaterThanOrEqualConditionOperator.cs

@@ -11,11 +11,9 @@ namespace Artemis.Core.Models.Profile.Conditions.Operators
         public override string Description => "Is greater than or equal to";
         public override string Icon => "GreaterThanOrEqual";
 
-        public override BinaryExpression CreateExpression(Type leftSideType, Type rightSideType)
+        public override BinaryExpression CreateExpression(Expression leftSide, Expression rightSide)
         {
-            var leftSideParameter = Expression.Parameter(leftSideType, "a");
-            var rightSideParameter = Expression.Parameter(rightSideType, "b");
-            return Expression.GreaterThanOrEqual(leftSideParameter, rightSideParameter);
+            return Expression.GreaterThanOrEqual(leftSide, rightSide);
         }
     }
 }

src/Artemis.Core/Models/Profile/Conditions/Operators/LessThanConditionOperator.cs

@@ -11,11 +11,9 @@ namespace Artemis.Core.Models.Profile.Conditions.Operators
         public override string Description => "Is less than";
         public override string Icon => "LessThan";
 
-        public override BinaryExpression CreateExpression(Type leftSideType, Type rightSideType)
+        public override BinaryExpression CreateExpression(Expression leftSide, Expression rightSide)
         {
-            var leftSideParameter = Expression.Parameter(leftSideType, "a");
-            var rightSideParameter = Expression.Parameter(rightSideType, "b");
-            return Expression.LessThan(leftSideParameter, rightSideParameter);
+            return Expression.LessThan(leftSide, rightSide);
         }
     }
 }

src/Artemis.Core/Models/Profile/Conditions/Operators/LessThanOrEqualConditionOperator.cs

@@ -11,11 +11,9 @@ namespace Artemis.Core.Models.Profile.Conditions.Operators
         public override string Description => "Is less than or equal to";
         public override string Icon => "LessThanOrEqual";
 
-        public override BinaryExpression CreateExpression(Type leftSideType, Type rightSideType)
+        public override BinaryExpression CreateExpression(Expression leftSide, Expression rightSide)
         {
-            var leftSideParameter = Expression.Parameter(leftSideType, "a");
-            var rightSideParameter = Expression.Parameter(rightSideType, "b");
-            return Expression.LessThanOrEqual(leftSideParameter, rightSideParameter);
+            return Expression.LessThanOrEqual(leftSide, rightSide);
         }
     }
 }

src/Artemis.Core/Models/Profile/Conditions/Operators/NotEqualConditionOperator.cs

@@ -11,11 +11,9 @@ namespace Artemis.Core.Models.Profile.Conditions.Operators
         public override string Description => "Does not equal";
         public override string Icon => "NotEqualVariant";
 
-        public override BinaryExpression CreateExpression(Type leftSideType, Type rightSideType)
+        public override BinaryExpression CreateExpression(Expression leftSide, Expression rightSide)
         {
-            var leftSideParameter = Expression.Parameter(leftSideType, "a");
-            var rightSideParameter = Expression.Parameter(rightSideType, "b");
-            return Expression.NotEqual(leftSideParameter, rightSideParameter);
+            return Expression.NotEqual(leftSide, rightSide);
         }
     }
 }