feat: Added parameters function and workflow parameters config

PowerAutomateMockUp/ExpressionParser/Functions/Implementations/Miscellaneous/ParametersFunction.cs

@@ -0,0 +1,39 @@
+using System.Linq;
+using Microsoft.Extensions.Options;
+using Parser.ExpressionParser.Functions.Base;
+using Parser.ExpressionParser.Functions.CustomException;
+
+namespace Parser.ExpressionParser.Functions.Implementations.Miscellaneous
+{
+    public class ParametersFunction : Function
+    {
+        private readonly WorkflowParameters _flowParameters;
+
+        public ParametersFunction(IOptions<WorkflowParameters> flowParameters) : base("parameters")
+        {
+            _flowParameters = flowParameters?.Value;
+        }
+
+        public override ValueContainer ExecuteFunction(params ValueContainer[] parameters)
+        {
+            var paramKey = parameters.FirstOrDefault();
+
+            if (paramKey == null || paramKey.Type() != ValueContainer.ValueType.String)
+            {
+                throw new ArgumentError("The parameters functions is expected to have one argument of type string");
+            }
+
+            if (_flowParameters?.Parameters == null)
+            {
+                return paramKey;
+            }
+
+            if (_flowParameters.Parameters.ContainsKey(paramKey.GetValue<string>()))
+            {
+                return _flowParameters.Parameters[paramKey.GetValue<string>()];
+            }
+
+            throw InvalidTemplateException.BuildInvalidLanguageFunction("ActionName", "parameters");
+        }
+    }
+}

PowerAutomateMockUp/WorkflowParameters.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+using Parser.ExpressionParser;
+
+namespace Parser
+{
+    public class WorkflowParameters
+    {
+        public Dictionary<string, ValueContainer> Parameters { get; set; }
+    }
+}