10 files changed, 138 insertions, 24 deletions
diff --git a/src/StardewModdingAPI/Framework/AssemblyRewriting/CacheEntry.cs b/src/StardewModdingAPI/Framework/AssemblyRewriting/CacheEntry.cs
index 3dfbc78c..a747eaa8 100644
--- a/src/StardewModdingAPI/Framework/AssemblyRewriting/CacheEntry.cs
+++ b/src/StardewModdingAPI/Framework/AssemblyRewriting/CacheEntry.cs
@@ -36,7 +36,7 @@ namespace StardewModdingAPI.Framework.AssemblyRewriting
         /// <param name="paths">The paths for the cached assembly.</param>
         /// <param name="hash">The MD5 hash of the original assembly.</param>
         /// <param name="currentVersion">The current SMAPI version.</param>
-        public bool IsUpToDate(CachePaths paths, string hash, Version currentVersion)
+        public bool IsUpToDate(CachePaths paths, string hash, ISemanticVersion currentVersion)
         {
             return hash == this.Hash
                 && this.ApiVersion == currentVersion.ToString()
diff --git a/src/StardewModdingAPI/Framework/ModAssemblyLoader.cs b/src/StardewModdingAPI/Framework/ModAssemblyLoader.cs
index 1ceb8ad2..a2c4ac23 100644
--- a/src/StardewModdingAPI/Framework/ModAssemblyLoader.cs
+++ b/src/StardewModdingAPI/Framework/ModAssemblyLoader.cs
@@ -58,7 +58,7 @@ namespace StardewModdingAPI.Framework
             CachePaths cachePaths = this.GetCachePaths(assemblyPath);
             {
                 CacheEntry cacheEntry = File.Exists(cachePaths.Metadata) ? JsonConvert.DeserializeObject<CacheEntry>(File.ReadAllText(cachePaths.Metadata)) : null;
-                if (cacheEntry != null && cacheEntry.IsUpToDate(cachePaths, hash, Constants.Version))
+                if (cacheEntry != null && cacheEntry.IsUpToDate(cachePaths, hash, Constants.ApiVersion))
                     return new RewriteResult(assemblyPath, cachePaths, assemblyBytes, cacheEntry.Hash, cacheEntry.UseCachedAssembly, isNewerThanCache: false); // no rewrite needed
             }
             this.Monitor.Log($"Preprocessing {Path.GetFileName(assemblyPath)} for compatibility...", LogLevel.Trace);
@@ -99,7 +99,7 @@ namespace StardewModdingAPI.Framework
             // cache all results
             foreach (RewriteResult result in results)
             {
-                CacheEntry cacheEntry = new CacheEntry(result.Hash, Constants.Version.ToString(), forceCacheAssemblies || result.UseCachedAssembly);
+                CacheEntry cacheEntry = new CacheEntry(result.Hash, Constants.ApiVersion.ToString(), forceCacheAssemblies || result.UseCachedAssembly);
                 File.WriteAllText(result.CachePaths.Metadata, JsonConvert.SerializeObject(cacheEntry));
                 if (forceCacheAssemblies || result.UseCachedAssembly)
                     File.WriteAllBytes(result.CachePaths.Assembly, result.AssemblyBytes);
diff --git a/src/StardewModdingAPI/Framework/ModRegistry.cs b/src/StardewModdingAPI/Framework/ModRegistry.cs
index ba56a447..b593142d 100644
--- a/src/StardewModdingAPI/Framework/ModRegistry.cs
+++ b/src/StardewModdingAPI/Framework/ModRegistry.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Linq;
 using System.Reflection;
 
 namespace StardewModdingAPI.Framework
@@ -11,6 +12,9 @@ namespace StardewModdingAPI.Framework
         /*********
         ** Properties
         *********/
+        /// <summary>The registered mod data.</summary>
+        private readonly List<IMod> Mods = new List<IMod>();
+
         /// <summary>The friendly mod names treated as deprecation warning sources (assembly full name => mod name).</summary>
         private readonly IDictionary<string, string> ModNamesByAssembly = new Dictionary<string, string>();
 
@@ -19,11 +23,17 @@ namespace StardewModdingAPI.Framework
         ** Public methods
         *********/
         /// <summary>Register a mod as a possible source of deprecation warnings.</summary>
-        /// <param name="manifest">The mod manifest.</param>
-        /// <param name="assembly">The mod assembly.</param>
-        public void Add(Manifest manifest, Assembly assembly)
+        /// <param name="mod">The mod instance.</param>
+        public void Add(IMod mod)
+        {
+            this.Mods.Add(mod);
+            this.ModNamesByAssembly[mod.GetType().Assembly.FullName] = mod.ModManifest.Name;
+        }
+
+        /// <summary>Get all enabled mods.</summary>
+        public IEnumerable<IMod> GetMods()
         {
-            this.ModNamesByAssembly[assembly.FullName] = manifest.Name;
+            return (from mod in this.Mods select mod);
         }
 
         /// <summary>Get the friendly name for the closest assembly registered as a source of deprecation warnings.</summary>
diff --git a/src/StardewModdingAPI/Framework/GitRelease.cs b/src/StardewModdingAPI/Framework/Models/GitRelease.cs
index 0da57efd..bc53468f 100644
--- a/src/StardewModdingAPI/Framework/GitRelease.cs
+++ b/src/StardewModdingAPI/Framework/Models/GitRelease.cs
@@ -1,6 +1,6 @@
 using Newtonsoft.Json;
 
-namespace StardewModdingAPI.Framework
+namespace StardewModdingAPI.Framework.Models
 {
     /// <summary>Metadata about a GitHub release tag.</summary>
     internal class GitRelease
diff --git a/src/StardewModdingAPI/Framework/Models/IncompatibleMod.cs b/src/StardewModdingAPI/Framework/Models/IncompatibleMod.cs
new file mode 100644
index 00000000..9bf06552
--- /dev/null
+++ b/src/StardewModdingAPI/Framework/Models/IncompatibleMod.cs
@@ -0,0 +1,47 @@
+using System.Text.RegularExpressions;
+
+namespace StardewModdingAPI.Framework.Models
+{
+    /// <summary>Contains abstract metadata about an incompatible mod.</summary>
+    internal class IncompatibleMod
+    {
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>The unique mod ID.</summary>
+        public string ID { get; set; }
+
+        /// <summary>The mod name.</summary>
+        public string Name { get; set; }
+
+        /// <summary>The most recent incompatible mod version.</summary>
+        public string Version { get; set; }
+
+        /// <summary>The URL the user can check for an official updated version.</summary>
+        public string UpdateUrl { get; set; }
+
+        /// <summary>The URL the user can check for an unofficial updated version.</summary>
+        public string UnofficialUpdateUrl { get; set; }
+
+        /// <summary>A regular expression matching version strings to consider compatible, even if they technically precede <see cref="Version"/>.</summary>
+        public string ForceCompatibleVersion { get; set; }
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Get whether the specified version is compatible according to this metadata.</summary>
+        /// <param name="version">The current version of the matching mod.</param>
+        public bool IsCompatible(ISemanticVersion version)
+        {
+            ISemanticVersion incompatibleVersion = new SemanticVersion(this.Version);
+
+            // allow newer versions
+            if (version.IsNewerThan(incompatibleVersion))
+                return true;
+
+            // allow versions matching override
+            return !string.IsNullOrWhiteSpace(this.ForceCompatibleVersion) && Regex.IsMatch(version.ToString(), this.ForceCompatibleVersion, RegexOptions.IgnoreCase);
+        }
+    }
+}
+\ No newline at end of file
diff --git a/src/StardewModdingAPI/Framework/Models/UserSettings.cs b/src/StardewModdingAPI/Framework/Models/UserSettings.cs
new file mode 100644
index 00000000..a0074f77
--- /dev/null
+++ b/src/StardewModdingAPI/Framework/Models/UserSettings.cs
@@ -0,0 +1,15 @@
+namespace StardewModdingAPI.Framework.Models
+{
+    /// <summary>Contains user settings from SMAPI's JSON configuration file.</summary>
+    internal class UserSettings
+    {
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>Whether to enable development features.</summary>
+        public bool DeveloperMode { get; set; }
+
+        /// <summary>Whether to check if a newer version of SMAPI is available on startup.</summary>
+        public bool CheckForUpdates { get; set; } = true;
+    }
+}
diff --git a/src/StardewModdingAPI/Framework/Reflection/CacheEntry.cs b/src/StardewModdingAPI/Framework/Reflection/CacheEntry.cs
new file mode 100644
index 00000000..30faca37
--- /dev/null
+++ b/src/StardewModdingAPI/Framework/Reflection/CacheEntry.cs
@@ -0,0 +1,30 @@
+using System.Reflection;
+
+namespace StardewModdingAPI.Framework.Reflection
+{
+    /// <summary>A cached member reflection result.</summary>
+    internal struct CacheEntry
+    {
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>Whether the lookup found a valid match.</summary>
+        public bool IsValid;
+
+        /// <summary>The reflection data for this member (or <c>null</c> if invalid).</summary>
+        public MemberInfo MemberInfo;
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="isValid">Whether the lookup found a valid match.</param>
+        /// <param name="memberInfo">The reflection data for this member (or <c>null</c> if invalid).</param>
+        public CacheEntry(bool isValid, MemberInfo memberInfo)
+        {
+            this.IsValid = isValid;
+            this.MemberInfo = memberInfo;
+        }
+    }
+}
diff --git a/src/StardewModdingAPI/Framework/Reflection/ReflectionHelper.cs b/src/StardewModdingAPI/Framework/Reflection/ReflectionHelper.cs
index 38b4e357..edf59b81 100644
--- a/src/StardewModdingAPI/Framework/Reflection/ReflectionHelper.cs
+++ b/src/StardewModdingAPI/Framework/Reflection/ReflectionHelper.cs
@@ -67,10 +67,17 @@ namespace StardewModdingAPI.Framework.Reflection
         /// <param name="obj">The object which has the field.</param>
         /// <param name="name">The field name.</param>
         /// <param name="required">Whether to throw an exception if the private field is not found.</param>
-        /// <remarks>This is a shortcut for <see cref="GetPrivateField{TValue}(object,string,bool)"/> followed by <see cref="IPrivateField{TValue}.GetValue"/>.</remarks>
+        /// <returns>Returns the field value, or the default value for <typeparamref name="TValue"/> if the field wasn't found and <paramref name="required"/> is false.</returns>
+        /// <remarks>
+        /// This is a shortcut for <see cref="GetPrivateField{TValue}(object,string,bool)"/> followed by <see cref="IPrivateField{TValue}.GetValue"/>.
+        /// When <paramref name="required" /> is false, this will return the default value if reflection fails. If you need to check whether the field exists, use <see cref="GetPrivateField{TValue}(object,string,bool)" /> instead.
+        /// </remarks>
         public TValue GetPrivateValue<TValue>(object obj, string name, bool required = true)
         {
-            return this.GetPrivateField<TValue>(obj, name, required).GetValue();
+            IPrivateField<TValue> field = this.GetPrivateField<TValue>(obj, name, required);
+            return field != null
+                ? field.GetValue()
+                : default(TValue);
         }
 
         /// <summary>Get the value of a private static field.</summary>
@@ -78,10 +85,17 @@ namespace StardewModdingAPI.Framework.Reflection
         /// <param name="type">The type which has the field.</param>
         /// <param name="name">The field name.</param>
         /// <param name="required">Whether to throw an exception if the private field is not found.</param>
-        /// <remarks>This is a shortcut for <see cref="GetPrivateField{TValue}(Type,string,bool)"/> followed by <see cref="IPrivateField{TValue}.GetValue"/>.</remarks>
+        /// <returns>Returns the field value, or the default value for <typeparamref name="TValue"/> if the field wasn't found and <paramref name="required"/> is false.</returns>
+        /// <remarks>
+        /// This is a shortcut for <see cref="GetPrivateField{TValue}(Type,string,bool)"/> followed by <see cref="IPrivateField{TValue}.GetValue"/>.
+        /// When <paramref name="required" /> is false, this will return the default value if reflection fails. If you need to check whether the field exists, use <see cref="GetPrivateField{TValue}(Type,string,bool)" /> instead.
+        /// </remarks>
         public TValue GetPrivateValue<TValue>(Type type, string name, bool required = true)
         {
-            return this.GetPrivateField<TValue>(type, name, required).GetValue();
+            IPrivateField<TValue> field = this.GetPrivateField<TValue>(type, name, required);
+            return field != null
+                ? field.GetValue()
+                : default(TValue);
         }
 
         /****
@@ -228,12 +242,18 @@ namespace StardewModdingAPI.Framework.Reflection
         {
             // get from cache
             if (this.Cache.Contains(key))
-                return (TMemberInfo)this.Cache[key];
+            {
+                CacheEntry entry = (CacheEntry)this.Cache[key];
+                return entry.IsValid
+                    ? (TMemberInfo)entry.MemberInfo
+                    : default(TMemberInfo);
+            }
 
             // fetch & cache new value
             TMemberInfo result = fetch();
-            this.Cache.Add(key, result, new CacheItemPolicy { SlidingExpiration = this.SlidingCacheExpiry });
+            CacheEntry cacheEntry = new CacheEntry(result != null, result);
+            this.Cache.Add(key, cacheEntry, new CacheItemPolicy { SlidingExpiration = this.SlidingCacheExpiry });
             return result;
         }
     }
-}
-\ No newline at end of file
+}
diff --git a/src/StardewModdingAPI/Framework/UpdateHelper.cs b/src/StardewModdingAPI/Framework/UpdateHelper.cs
index ddd1d840..e01e55c8 100644
--- a/src/StardewModdingAPI/Framework/UpdateHelper.cs
+++ b/src/StardewModdingAPI/Framework/UpdateHelper.cs
@@ -3,6 +3,7 @@ using System.Net;
 using System.Reflection;
 using System.Threading.Tasks;
 using Newtonsoft.Json;
+using StardewModdingAPI.Framework.Models;
 
 namespace StardewModdingAPI.Framework
 {
diff --git a/src/StardewModdingAPI/Framework/UserSettings.cs b/src/StardewModdingAPI/Framework/UserSettings.cs
deleted file mode 100644
index 199d19b3..00000000
--- a/src/StardewModdingAPI/Framework/UserSettings.cs
+++ /dev/null
@@ -1,9 +0,0 @@
-namespace StardewModdingAPI.Framework
-{
-    /// <summary>Contains user settings from SMAPI's JSON configuration file.</summary>
-    internal class UserSettings
-    {
-        /// <summary>Whether to enable development features.</summary>
-        public bool DeveloperMode { get; set; }
-    }
-}