feat: general improvements

Author: ReneSchwarzer

src/WebExpress.WebCore/WebAsset/AssetContext.cs

@@ -51,7 +51,7 @@ public class AssetContext : IAssetContext
         /// <summary>
         /// Returns the attributes associated with the page.
         /// </summary>
-        public IEnumerable<Type> Attributes => [];
+        public IEnumerable<Attribute> Attributes => [];
 
         /// <summary>
         /// Initializes a new instance of the class with the specified endpoint manager, parent type, context path, and path segment.

src/WebExpress.WebCore/WebEndpoint/EndpointManager.cs

@@ -249,5 +249,37 @@ public static IRoute CreateEndpointRoute
 
             return uri;
         }
+
+        /// <summary>
+        /// Creates instances of attributes from a collection of <see cref="CustomAttributeData"/> objects.
+        /// </summary>
+        /// <param name="customAttributesData">A collection of objects representing the metadata of attributes.</param>
+        /// <returns>An enumerable of instances created from the provided metadata. If
+        /// no attributes are instantiated, an empty collection is returned.</returns>
+        public static IEnumerable<Attribute> GetAttributeInstances(IEnumerable<CustomAttributeData> customAttributesData)
+        {
+            List<Attribute> attributeInstances = [];
+
+            foreach (var attrData in customAttributesData)
+            {
+                var attributeType = attrData.AttributeType;
+                var constructorArgs = new List<object>();
+
+                // extract constructor arguments
+                foreach (var arg in attrData.ConstructorArguments)
+                {
+                    constructorArgs.Add(arg.Value);
+                }
+
+                // instantiate the attribute using Reflection
+                var attributeInstance = Activator.CreateInstance(attributeType, constructorArgs.ToArray()) as Attribute;
+                if (attributeInstance != null)
+                {
+                    attributeInstances.Add(attributeInstance);
+                }
+            }
+
+            return attributeInstances;
+        }
     }
 }

src/WebExpress.WebCore/WebEndpoint/IEndpointContext.cs

@@ -50,6 +50,6 @@ public interface IEndpointContext : IContext
         /// <summary>
         /// Returns the attributes associated with the page.
         /// </summary>
-        IEnumerable<Type> Attributes { get; }
+        IEnumerable<Attribute> Attributes { get; }
     }
 }

src/WebExpress.WebCore/WebMessage/Response.cs

@@ -34,5 +34,17 @@ public abstract class Response
         protected Response()
         {
         }
+
+        /// <summary>
+        /// Appends the specified content type to the existing Content-Type header value.
+        /// </summary>
+        /// <param name="contentType">The content type to append. Cannot be null or empty.</param>
+        /// <returns>The current instance, allowing for method chaining.</returns>
+        public Response AddHeaderContentType(string contentType)
+        {
+            Header.ContentType = contentType?.Trim();
+
+            return this;
+        }
     }
 }

src/WebExpress.WebCore/WebPage/PageContext.cs

@@ -59,7 +59,7 @@ public class PageContext : IPageContext
         /// <summary>
         /// Returns the attributes associated with the page.
         /// </summary>
-        public IEnumerable<Type> Attributes { get; internal set; }
+        public IEnumerable<Attribute> Attributes { get; internal set; }
 
         /// <summary>
         /// Returns the context path.

src/WebExpress.WebCore/WebPage/PageManager.cs

@@ -371,7 +371,7 @@ private void Register(IPluginContext pluginContext, IEnumerable<IApplicationCont
                         Cache = cache,
                         Conditions = conditions,
                         IncludeSubPaths = includeSubPaths,
-                        Attributes = attributes.Select(x => x.AttributeType)
+                        Attributes = EndpointManager.GetAttributeInstances(attributes)
                     };
 
                     var pageItem = new PageItem(_componentHub.EndpointManager)

src/WebExpress.WebCore/WebResource/ResourceContext.cs

@@ -57,7 +57,7 @@ public class ResourceContext : IResourceContext
         /// <summary>
         /// Returns the attributes associated with the page.
         /// </summary>
-        public IEnumerable<Type> Attributes { get; internal set; }
+        public IEnumerable<Attribute> Attributes { get; internal set; }
 
         /// <summary>
         /// Initializes a new instance of the class with the specified endpoint manager, parent type, context path, and path segment.

src/WebExpress.WebCore/WebResource/ResourceManager.cs

@@ -178,7 +178,7 @@ private void Register(IPluginContext pluginContext, IEnumerable<IApplicationCont
                         Cache = cache,
                         Conditions = conditions,
                         IncludeSubPaths = includeSubPaths,
-                        Attributes = attributes.Select(x => x.AttributeType)
+                        Attributes = EndpointManager.GetAttributeInstances(attributes)
                     };
 
                     var resourceItem = new ResourceItem(_componentHub.ResourceManager)

src/WebExpress.WebCore/WebRestAPI/RestApiContext.cs

@@ -57,7 +57,7 @@ public class RestApiContext : IRestApiContext
         /// <summary>
         /// Returns the attributes associated with the page.
         /// </summary>
-        public IEnumerable<Type> Attributes { get; internal set; }
+        public IEnumerable<Attribute> Attributes { get; internal set; }
 
         /// <summary>
         /// Returns the context path.

src/WebExpress.WebCore/WebRestAPI/RestApiManager.cs

@@ -91,7 +91,8 @@ private RestApiManager(IComponentHub componentHub, IHttpServerContext httpServer
                                     return new ResponseOK
                                     {
                                         Content = content
-                                    };
+                                    }
+                                    .AddHeaderContentType("application/json");
                                 }
 
                                 return new ResponseOK();
@@ -387,7 +388,7 @@ private void Register(IPluginContext pluginContext, IEnumerable<IApplicationCont
                         Cache = cache,
                         Conditions = conditions,
                         IncludeSubPaths = includeSubPaths,
-                        Attributes = attributes.Select(x => x.AttributeType),
+                        Attributes = EndpointManager.GetAttributeInstances(attributes),
                         Version = version,
                         Methods = methods.Distinct()
                     };