From d6ba2ee966cfd1f37461be91c1ebfb67aa672599 Mon Sep 17 00:00:00 2001
From: Pranav K <prkrishn@hotmail.com>
Date: Tue, 6 Mar 2018 17:50:25 -0800
Subject: [PATCH] Add wireframe for ConfigureApplicationPart

---
 .../ApplicationPartFactory.cs                 | 31 +++++++++++++++++++
 .../ProvideApplicationPartFactoryAttribute.cs | 21 +++++++++++++
 .../RelatedAssemblyAttribute.cs               | 22 +++++++++++++
 ...iledRazorAssemblyApplicationPartFactory.cs | 28 +++++++++++++++++
 .../CompiledRazorAssemblyPart.cs              | 20 ++++++++++++
 5 files changed, 122 insertions(+)
 create mode 100644 src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/ApplicationPartFactory.cs
 create mode 100644 src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/ProvideApplicationPartFactoryAttribute.cs
 create mode 100644 src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/RelatedAssemblyAttribute.cs
 create mode 100644 src/Microsoft.AspNetCore.Mvc.Razor/ApplicationParts/CompiledRazorAssemblyApplicationPartFactory.cs
 create mode 100644 src/Microsoft.AspNetCore.Mvc.Razor/ApplicationParts/CompiledRazorAssemblyPart.cs

diff --git a/src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/ApplicationPartFactory.cs b/src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/ApplicationPartFactory.cs
new file mode 100644
index 0000000000..88a93f9881
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/ApplicationPartFactory.cs
@@ -0,0 +1,31 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System.Collections.Generic;
+using System.Reflection;
+
+namespace Microsoft.AspNetCore.Mvc.ApplicationParts
+{
+    /// <summary>
+    /// Specifies a contract for synthesizing one or more <see cref="ApplicationPart"/> instances
+    /// from an <see cref="Assembly"/>.
+    /// <para>
+    /// By default, Mvc registers each application assembly that it discovers as an <see cref="AssemblyPart"/>.
+    /// Assemblies can optionally specify an <see cref="ApplicationPartFactory"/> to configure parts for the assembly
+    /// by using <see cref="ProvideApplicationPartFactoryAttribute"/>.
+    /// </para>
+    /// </summary>
+    public abstract class ApplicationPartFactory
+    {
+        public static readonly string DefaultContextName = "Default";
+
+        /// <summary>
+        /// Gets one or more <see cref="ApplicationPart"/> instances for the specified <paramref name="assembly"/>.
+        /// </summary>
+        /// <param name="assembly">The <see cref="Assembly"/>.</param>
+        /// <param name="context">
+        /// The context name. By default, value of this parameter is <see cref="DefaultContextName"/>.
+        /// </param>
+        public abstract IEnumerable<ApplicationPart> GetApplicationParts(Assembly assembly, string context);
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/ProvideApplicationPartFactoryAttribute.cs b/src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/ProvideApplicationPartFactoryAttribute.cs
new file mode 100644
index 0000000000..18efd45c34
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/ProvideApplicationPartFactoryAttribute.cs
@@ -0,0 +1,21 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+
+namespace Microsoft.AspNetCore.Mvc.ApplicationParts
+{
+    /// <summary>
+    /// Provides a <see cref="ApplicationPartFactory"/> type.
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = false)]
+    public sealed class ProvideApplicationPartFactoryAttribute : Attribute
+    {
+        public ProvideApplicationPartFactoryAttribute(Type factoryType)
+        {
+            ApplicationPartFactoryType = factoryType ?? throw new ArgumentNullException(nameof(factoryType));
+        }
+
+        public Type ApplicationPartFactoryType { get; }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/RelatedAssemblyAttribute.cs b/src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/RelatedAssemblyAttribute.cs
new file mode 100644
index 0000000000..344c39542f
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Mvc.Core/ApplicationParts/RelatedAssemblyAttribute.cs
@@ -0,0 +1,22 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using Microsoft.AspNetCore.Mvc.Core;
+
+namespace Microsoft.AspNetCore.Mvc.ApplicationParts
+{
+    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
+    public sealed class RelatedAssemblyAttribute : Attribute
+    {
+        public RelatedAssemblyAttribute(string name)
+        {
+            if (string.IsNullOrEmpty(name))
+            {
+                throw new ArgumentException(Resources.ArgumentCannotBeNullOrEmpty, nameof(name));
+            }
+        }
+
+        public string Name { get; }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Mvc.Razor/ApplicationParts/CompiledRazorAssemblyApplicationPartFactory.cs b/src/Microsoft.AspNetCore.Mvc.Razor/ApplicationParts/CompiledRazorAssemblyApplicationPartFactory.cs
new file mode 100644
index 0000000000..4da198233a
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Mvc.Razor/ApplicationParts/CompiledRazorAssemblyApplicationPartFactory.cs
@@ -0,0 +1,28 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+
+namespace Microsoft.AspNetCore.Mvc.ApplicationParts
+{
+    /// <summary>
+    /// Configures an assembly as a <see cref="CompiledRazorAssemblyPart"/>.
+    /// </summary>
+    public class CompiledRazorAssemblyApplicationPartFactory : ApplicationPartFactory
+    {
+        /// <inheritdoc />
+        public override IEnumerable<ApplicationPart> GetApplicationParts(
+            Assembly assembly,
+            string configuration)
+        {
+            if (assembly == null)
+            {
+                throw new ArgumentNullException(nameof(assembly));
+            }
+
+            yield return new CompiledRazorAssemblyPart(assembly);
+        }
+    }
+}
diff --git a/src/Microsoft.AspNetCore.Mvc.Razor/ApplicationParts/CompiledRazorAssemblyPart.cs b/src/Microsoft.AspNetCore.Mvc.Razor/ApplicationParts/CompiledRazorAssemblyPart.cs
new file mode 100644
index 0000000000..bed15f201f
--- /dev/null
+++ b/src/Microsoft.AspNetCore.Mvc.Razor/ApplicationParts/CompiledRazorAssemblyPart.cs
@@ -0,0 +1,20 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Reflection;
+
+namespace Microsoft.AspNetCore.Mvc.ApplicationParts
+{
+    public class CompiledRazorAssemblyPart : ApplicationPart
+    {
+        public CompiledRazorAssemblyPart(Assembly assembly)
+        {
+            Assembly = assembly ?? throw new ArgumentNullException(nameof(assembly));
+        }
+
+        public Assembly Assembly { get; }
+
+        public override string Name => Assembly.GetName().Name;
+    }
+}