encapsulate update key to URL logic for reuse (#437)

3 files changed, 31 insertions, 20 deletions

diff --git a/src/SMAPI/Constants.cs b/src/SMAPI/Constants.cs
index 515e9870..caee93e4 100644
--- a/src/SMAPI/Constants.cs
+++ b/src/SMAPI/Constants.cs
@@ -21,6 +21,14 @@ namespace StardewModdingAPI
         /// <summary>Whether the directory containing the current save's data exists on disk.</summary>
         private static bool SavePathReady => Context.IsSaveLoaded && Directory.Exists(Constants.RawSavePath);
 
+        /// <summary>Maps vendor keys (like <c>Nexus</c>) to their mod URL template (where <c>{0}</c> is the mod ID). This doesn't affect update checks, which defer to the remote web API.</summary>
+        private static readonly IDictionary<string, string> VendorModUrls = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase)
+        {
+            ["Chucklefish"] = "https://community.playstarbound.com/resources/{0}",
+            ["Nexus"] = "http://nexusmods.com/stardewvalley/mods/{0}",
+            ["GitHub"] = "https://github.com/{0}/releases"
+        };
+
 
         /*********
         ** Accessors
@@ -87,14 +95,6 @@ namespace StardewModdingAPI
         Platform.Mono;
 #endif
 
-        /// <summary>Maps vendor keys (like <c>Nexus</c>) to their mod URL template (where <c>{0}</c> is the mod ID) during mod compatibility checks. This doesn't affect update checks, which defer to the remote web API.</summary>
-        internal static readonly IDictionary<string, string> VendorModUrls = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase)
-        {
-            ["Chucklefish"] = "https://community.playstarbound.com/resources/{0}",
-            ["Nexus"] = "http://nexusmods.com/stardewvalley/mods/{0}",
-            ["GitHub"] = "https://github.com/{0}/releases"
-        };
-
 
         /*********
         ** Internal methods
@@ -145,6 +145,23 @@ namespace StardewModdingAPI
             return new PlatformAssemblyMap(targetPlatform, removeAssemblyReferences, targetAssemblies);
         }
 
+        /// <summary>Get an update URL for an update key (if valid).</summary>
+        /// <param name="updateKey">The update key.</param>
+        internal static string GetUpdateUrl(string updateKey)
+        {
+            string[] parts = updateKey.Split(new[] { ':' }, 2);
+            if (parts.Length != 2)
+                return null;
+
+            string vendorKey = parts[0].Trim();
+            string modID = parts[1].Trim();
+
+            if (Constants.VendorModUrls.TryGetValue(vendorKey, out string urlTemplate))
+                return string.Format(urlTemplate, modID);
+
+            return null;
+        }
+
 
         /*********
         ** Private methods
diff --git a/src/SMAPI/Framework/ModLoading/ModResolver.cs b/src/SMAPI/Framework/ModLoading/ModResolver.cs
index 09a9299e..99d86bf8 100644
--- a/src/SMAPI/Framework/ModLoading/ModResolver.cs
+++ b/src/SMAPI/Framework/ModLoading/ModResolver.cs
@@ -73,8 +73,8 @@ namespace StardewModdingAPI.Framework.ModLoading
         /// <summary>Validate manifest metadata.</summary>
         /// <param name="mods">The mod manifests to validate.</param>
         /// <param name="apiVersion">The current SMAPI version.</param>
-        /// <param name="vendorModUrls">Maps vendor keys (like <c>Nexus</c>) to their mod URL template (where <c>{0}</c> is the mod ID).</param>
-        public void ValidateManifests(IEnumerable<IModMetadata> mods, ISemanticVersion apiVersion, IDictionary<string, string> vendorModUrls)
+        /// <param name="getUpdateUrl">Get an update URL for an update key (if valid).</param>
+        public void ValidateManifests(IEnumerable<IModMetadata> mods, ISemanticVersion apiVersion, Func<string, string> getUpdateUrl)
         {
             mods = mods.ToArray();
 
@@ -101,15 +101,9 @@ namespace StardewModdingAPI.Framework.ModLoading
                             List<string> updateUrls = new List<string>();
                             foreach (string key in mod.Manifest.UpdateKeys ?? new string[0])
                             {
-                                string[] parts = key.Split(new[] { ':' }, 2);
-                                if (parts.Length != 2)
-                                    continue;
-
-                                string vendorKey = parts[0].Trim();
-                                string modID = parts[1].Trim();
-
-                                if (vendorModUrls.TryGetValue(vendorKey, out string urlTemplate))
-                                    updateUrls.Add(string.Format(urlTemplate, modID));
+                                string url = getUpdateUrl(key);
+                                if (url != null)
+                                    updateUrls.Add(url);
                             }
                             if (mod.DataRecord.AlternativeUrl != null)
                                 updateUrls.Add(mod.DataRecord.AlternativeUrl);
diff --git a/src/SMAPI/Program.cs b/src/SMAPI/Program.cs
index ec841f4c..85bc83a7 100644
--- a/src/SMAPI/Program.cs
+++ b/src/SMAPI/Program.cs
@@ -360,7 +360,7 @@ namespace StardewModdingAPI
 
                 // load manifests
                 IModMetadata[] mods = resolver.ReadManifests(Constants.ModPath, new JsonHelper(), modDatabase).ToArray();
-                resolver.ValidateManifests(mods, Constants.ApiVersion, Constants.VendorModUrls);
+                resolver.ValidateManifests(mods, Constants.ApiVersion, Constants.GetUpdateUrl);
 
                 // process dependencies
                 mods = resolver.ProcessDependencies(mods, modDatabase).ToArray();