make web controllers internal (#336)

This is needed to support internal models, which is needed to share the models with the main SMAPI assembly without making them visible to mods.

src/StardewModdingAPI.Web/Controllers/ModsController.cs

@@ -13,7 +13,7 @@ namespace StardewModdingAPI.Web.Controllers
 {
     /// <summary>Provides an API to perform mod update checks.</summary>
     [Produces("application/json")]
-    public class ModsController : Controller
+    internal class ModsController : Controller
     {
         /*********
         ** Properties

src/StardewModdingAPI.Web/Framework/InternalControllerFeatureProvider.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Reflection;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Controllers;
+
+namespace StardewModdingAPI.Web.Framework
+{
+    /// <summary>Discovers controllers with support for non-public controllers.</summary>
+    internal class InternalControllerFeatureProvider : ControllerFeatureProvider
+    {
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Determines if a given type is a controller.</summary>
+        /// <param name="type">The <see cref="T:System.Reflection.TypeInfo" /> candidate.</param>
+        /// <returns><code>true</code> if the type is a controller; otherwise <code>false</code>.</returns>
+        protected override bool IsController(TypeInfo type)
+        {
+            return
+                type.IsClass
+                && !type.IsAbstract
+                && (/*type.IsPublic &&*/ !type.ContainsGenericParameters)
+                && (!type.IsDefined(typeof(NonControllerAttribute))
+                && (type.Name.EndsWith("Controller", StringComparison.OrdinalIgnoreCase) || type.IsDefined(typeof(ControllerAttribute))));
+        }
+    }
+}

src/StardewModdingAPI.Web/Framework/RewriteSubdomainRule.cs

@@ -5,7 +5,7 @@ namespace StardewModdingAPI.Web.Framework
 {
     /// <summary>Rewrite requests to prepend the subdomain portion (if any) to the path.</summary>
     /// <remarks>Derived from <a href="https://stackoverflow.com/a/44526747/262123" />.</remarks>
-    public class RewriteSubdomainRule : IRule
+    internal class RewriteSubdomainRule : IRule
     {
         /// <summary>Applies the rule. Implementations of ApplyRule should set the value for <see cref="RewriteContext.Result" /> (defaults to RuleResult.ContinueRules).</summary>
         /// <param name="context">The rewrite context.</param>

src/StardewModdingAPI.Web/Models/ModInfoModel.cs

@@ -3,7 +3,7 @@ using Newtonsoft.Json;
 namespace StardewModdingAPI.Web.Models
 {
     /// <summary>Generic metadata about a mod.</summary>
-    public class ModInfoModel
+    internal class ModInfoModel
     {
         /*********
         ** Accessors

src/StardewModdingAPI.Web/Models/ModSearchModel.cs

@@ -1,7 +1,7 @@
 namespace StardewModdingAPI.Web.Models
 {
     /// <summary>Metadata for mods to look up.</summary>
-    public class ModSearchModel
+    internal class ModSearchModel
     {
         /// <summary>The namespaced mod keys to search.</summary>
         public string[] ModKeys { get; set; }

src/StardewModdingAPI.Web/Startup.cs

@@ -11,7 +11,7 @@ using StardewModdingAPI.Web.Framework.ConfigModels;
 namespace StardewModdingAPI.Web
 {
     /// <summary>The web app startup configuration.</summary>
-    public class Startup
+    internal class Startup
     {
         /*********
         ** Accessors
@@ -44,6 +44,7 @@ namespace StardewModdingAPI.Web
                 .Configure<ModUpdateCheckConfig>(this.Configuration.GetSection("ModUpdateCheck"))
                 .AddMemoryCache()
                 .AddMvc()
+                .ConfigureApplicationPartManager(manager => manager.FeatureProviders.Add(new InternalControllerFeatureProvider()))
                 .AddJsonOptions(options =>
                 {
                     options.SerializerSettings.Formatting = Formatting.Indented;