添加项目文件。

TightWiki.Engine.Function/FunctionParameters.cs

@@ -0,0 +1,75 @@
+using NTDLS.Helpers;
+
+namespace TightWiki.Engine.Function
+{
+    public class FunctionParameters
+    {
+        /// <summary>
+        /// Variables set by ordinal.
+        /// </summary>
+        public List<OrdinalParameter> Ordinals { get; set; } = new();
+        /// <summary>
+        /// Variables set by name.
+        /// </summary>
+        public List<NamedParameter> Named { get; private set; } = new();
+
+        private readonly FunctionCall _owner;
+
+        public FunctionParameters(FunctionCall owner)
+        {
+            _owner = owner;
+        }
+
+        public T Get<T>(string name)
+        {
+            try
+            {
+                var value = Named.Where(o => o.Name.Equals(name, StringComparison.InvariantCultureIgnoreCase)).FirstOrDefault()?.Value;
+                if (value == null)
+                {
+                    var prototype = _owner.Prototype.Parameters.Where(o => o.Name.Equals(name, StringComparison.InvariantCultureIgnoreCase)).First();
+                    return Converters.ConvertTo<T>(prototype.DefaultValue) ?? throw new Exception("Value cannot be null");
+                }
+
+                return Converters.ConvertTo<T>(value) ?? throw new Exception("Value cannot be null");
+            }
+            catch (Exception ex)
+            {
+                throw new Exception($"Function [{_owner.Name}], {ex.Message}");
+            }
+        }
+
+        public T Get<T>(string name, T defaultValue)
+        {
+            try
+            {
+                var value = Named.Where(o => o.Name.Equals(name, StringComparison.InvariantCultureIgnoreCase)).FirstOrDefault()?.Value;
+                if (value == null)
+                {
+                    return defaultValue;
+                }
+
+                return Converters.ConvertTo<T>(value) ?? throw new Exception("Value cannot be null");
+            }
+            catch (Exception ex)
+            {
+                throw new Exception($"Function [{_owner.Name}], {ex.Message}");
+            }
+        }
+
+        public List<T> GetList<T>(string name)
+        {
+            try
+            {
+                var values = Named.Where(o => o.Name.Equals(name, StringComparison.InvariantCultureIgnoreCase))?
+                    .Select(o => Converters.ConvertTo<T>(o.Value) ?? throw new Exception("Value cannot be null"))?.ToList();
+
+                return values ?? new List<T>();
+            }
+            catch (Exception ex)
+            {
+                throw new Exception($"Function [{_owner.Name}], {ex.Message}");
+            }
+        }
+    }
+}