log mod-provided API access (#409)

2 files changed, 14 insertions, 3 deletions

diff --git a/src/SMAPI/Framework/ModHelpers/ModRegistryHelper.cs b/src/SMAPI/Framework/ModHelpers/ModRegistryHelper.cs
index 949d986a..827c77d5 100644
--- a/src/SMAPI/Framework/ModHelpers/ModRegistryHelper.cs
+++ b/src/SMAPI/Framework/ModHelpers/ModRegistryHelper.cs
@@ -12,6 +12,12 @@ namespace StardewModdingAPI.Framework.ModHelpers
         /// <summary>The underlying mod registry.</summary>
         private readonly ModRegistry Registry;
 
+        /// <summary>Encapsulates monitoring and logging for the mod.</summary>
+        private readonly IMonitor Monitor;
+
+        /// <summary>The mod IDs for APIs accessed by this instanced.</summary>
+        private readonly HashSet<string> AccessedModApis = new HashSet<string>();
+
 
         /*********
         ** Public methods
@@ -19,10 +25,12 @@ namespace StardewModdingAPI.Framework.ModHelpers
         /// <summary>Construct an instance.</summary>
         /// <param name="modID">The unique ID of the relevant mod.</param>
         /// <param name="registry">The underlying mod registry.</param>
-        public ModRegistryHelper(string modID, ModRegistry registry)
+        /// <param name="monitor">Encapsulates monitoring and logging for the mod.</param>
+        public ModRegistryHelper(string modID, ModRegistry registry, IMonitor monitor)
             : base(modID)
         {
             this.Registry = registry;
+            this.Monitor = monitor;
         }
 
         /// <summary>Get metadata for all loaded mods.</summary>
@@ -49,7 +57,10 @@ namespace StardewModdingAPI.Framework.ModHelpers
         /// <summary>Get the API provided by a mod, or <c>null</c> if it has none. This signature requires using the <see cref="IModHelper.Reflection"/> API to access the API's properties and methods.</summary>
         public object GetApi(string uniqueID)
         {
-            return this.Registry.Get(uniqueID)?.Api;
+            IModMetadata mod = this.Registry.Get(uniqueID);
+            if (mod?.Api != null && this.AccessedModApis.Add(mod.Manifest.UniqueID))
+                this.Monitor.Log($"Accessed mod-provided API for {mod.DisplayName}.", LogLevel.Trace);
+            return mod?.Api;
         }
     }
 }
diff --git a/src/SMAPI/Program.cs b/src/SMAPI/Program.cs
index e7552630..17fe2f36 100644
--- a/src/SMAPI/Program.cs
+++ b/src/SMAPI/Program.cs
@@ -706,7 +706,7 @@ namespace StardewModdingAPI
                             ICommandHelper commandHelper = new CommandHelper(manifest.UniqueID, metadata.DisplayName, this.CommandManager);
                             IContentHelper contentHelper = new ContentHelper(contentManager, metadata.DirectoryPath, manifest.UniqueID, metadata.DisplayName, monitor);
                             IReflectionHelper reflectionHelper = new ReflectionHelper(manifest.UniqueID, metadata.DisplayName, this.Reflection, this.DeprecationManager);
-                            IModRegistry modRegistryHelper = new ModRegistryHelper(manifest.UniqueID, this.ModRegistry);
+                            IModRegistry modRegistryHelper = new ModRegistryHelper(manifest.UniqueID, this.ModRegistry, monitor);
                             ITranslationHelper translationHelper = new TranslationHelper(manifest.UniqueID, manifest.Name, contentManager.GetLocale(), contentManager.GetCurrentLanguage());
                             modHelper = new ModHelper(manifest.UniqueID, metadata.DirectoryPath, jsonHelper, contentHelper, commandHelper, modRegistryHelper, reflectionHelper, translationHelper);
                         }