Adding support for the infer of Json data in constants for Web models

Author: tsutomi

src/Deveel.Filter.Model.Web/Filters/FilterModel.cs

@@ -146,8 +146,12 @@ public virtual IFilter BuildFilter() {
 				throw new FilterException("The model is invalid - no type was set");
 
 			switch (filterType) {
-				case FilterType.Constant:
-					return new ConstantFilter(value);
+				case FilterType.Constant: {
+						if (value is JsonElement json)
+							value = JsonElementUtil.InferValue(json);
+
+						return new ConstantFilter(value);
+					}
 				case FilterType.Not:
 					if (not == null)
 						throw new FilterException("The model is invalid - no unary filter was set");

…ter.Model.Web/Filters/JsonElementUtil.cs ….Filter.Model/Filters/JsonElementUtil.cssrc/Deveel.Filter.Model.Web/Filters/JsonElementUtil.cs renamed to src/Deveel.Filter.Model/Filters/JsonElementUtil.cs src/Deveel.Filter.Model.Web/Filters/JsonElementUtil.cs renamed to src/Deveel.Filter.Model/Filters/JsonElementUtil.cs

@@ -105,6 +105,20 @@ public static void BuildConstant() {
 			Assert.Equal(42, constant.Value);
 		}
 
+		[Fact]
+		public static void BuildConstantWithJson() {
+			var filter = new FilterModel {
+				Value = JsonDocument.Parse("42").RootElement
+			};
+
+			var result = filter.BuildFilter();
+			Assert.NotNull(result);
+			Assert.IsType<ConstantFilter>(result);
+			Assert.Equal(FilterType.Constant, result.FilterType);
+			var constant = (ConstantFilter) result;
+			Assert.Equal(42, constant.Value);
+		}
+
 		[Fact]
 		public static void BuildFunction() {
 			var function = new FilterModel {