[Add] IEnumerableHelper

uml4net.HandleBars/IEnumerableHelper.cs

@@ -0,0 +1,53 @@
+// -------------------------------------------------------------------------------------------------
+//  <copyright file="IEnumerableHelper.cs" company="Starion Group S.A.">
+// 
+//    Copyright 2019-2024 Starion Group S.A.
+// 
+//    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, softwareUseCases
+//    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.
+// 
+//  </copyright>
+//  ------------------------------------------------------------------------------------------------
+
+namespace uml4net.HandleBars
+{
+    using System.Collections.Generic;
+    using System.Linq;
+
+    using HandlebarsDotNet;
+
+    /// <summary>
+    /// A  helper that supports operations on IEnumerable
+    /// </summary>
+    public static class IEnumerableHelper
+    {
+        /// <summary>
+        /// Registers the <see cref="IEnumerableHelper"/>
+        /// </summary>
+        /// <param name="handlebars">
+        /// The <see cref="IHandlebars"/> context with which the helper needs to be registered
+        /// </param>
+        public static void RegisterEnumerableHelper(this IHandlebars handlebars)
+        {
+            handlebars.RegisterHelper("IEnumerable.IsEmpty", (context, parameters) =>
+            {
+                if (parameters[0] is IEnumerable<object> list && !list.Any())
+                {
+                    return true;
+                }
+
+                return false;
+
+            });
+        }
+    }
+}

uml4net.Reporting/Generators/HandleBarsReportGenerator.cs

@@ -35,6 +35,7 @@ namespace uml4net.Reporting.Generators
     using uml4net.Reporting.Payload;
     using uml4net.Reporting.Resources;
     using uml4net.xmi.Readers;
+    using uml4net.HandleBars;
 
     /// <summary>
     /// Abstract super class from which all <see cref="HandlebarsDotNet"/> generators
@@ -75,6 +76,7 @@ protected HandleBarsReportGenerator(ILoggerFactory loggerFactory = null) : base(
         protected virtual void RegisterHelpers()
         {
             uml4net.HandleBars.StringHelper.RegisterStringHelper(this.Handlebars);
+            uml4net.HandleBars.IEnumerableHelper.RegisterEnumerableHelper(this.Handlebars);
             uml4net.HandleBars.PropertyHelper.RegisterStructuralFeatureHelper(this.Handlebars);
             uml4net.HandleBars.GeneralizationHelper.RegisterGeneralizationHelper(this.Handlebars);
             uml4net.HandleBars.DocumentationHelper.RegisteredDocumentationHelper(this.Handlebars);