From 366422d26210272eb5d767c9041c53ee6d548c6f Mon Sep 17 00:00:00 2001
From: Anairkoen Schno <aaron.cirr.com@gmail.com>
Date: Sun, 5 Apr 2020 01:04:56 -0500
Subject: [PATCH] DisabledConfig now correctly enables and disables mods when
 reloaded

---
 IPA.Loader/Loader/DisabledConfig.cs | 139 ++++++++++++++++++++--------
 1 file changed, 99 insertions(+), 40 deletions(-)

diff --git a/IPA.Loader/Loader/DisabledConfig.cs b/IPA.Loader/Loader/DisabledConfig.cs
index e1059c5f..b06bc8a6 100644
--- a/IPA.Loader/Loader/DisabledConfig.cs
+++ b/IPA.Loader/Loader/DisabledConfig.cs
@@ -1,44 +1,103 @@
-using IPA.Config;
-using IPA.Config.Stores;
-using IPA.Config.Stores.Attributes;
-using IPA.Config.Stores.Converters;
-using IPA.Utilities;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace IPA.Loader
-{
-    internal class DisabledConfig
-    {
-        public static Config.Config Disabled { get; set; }
-
-        public static DisabledConfig Instance;
-
-        public static void Load()
-        {
-            Disabled = Config.Config.GetConfigFor("Disabled Mods", "json");
-            Instance = Disabled.Generated<DisabledConfig>();
-        }
-
-        public virtual bool Reset { get; set; } = true;
-
-        [NonNullable]
-        [UseConverter(typeof(CollectionConverter<string, HashSet<string>>))]
-        public virtual HashSet<string> DisabledModIds { get; set; } = new HashSet<string>();
-
-        protected internal virtual void Changed() { }
-        protected internal virtual IDisposable ChangeTransaction() => null;
-
-        protected virtual void OnReload()
-        {
+using IPA.Config;
+using IPA.Config.Stores;
+using IPA.Config.Stores.Attributes;
+using IPA.Config.Stores.Converters;
+using IPA.Logging;
+using IPA.Utilities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+#if NET4
+using Task = System.Threading.Tasks.Task;
+using TaskEx = System.Threading.Tasks.Task;
+#endif
+#if NET3
+using Net3_Proxy;
+#endif
+
+namespace IPA.Loader
+{
+    internal class DisabledConfig
+    {
+        public static Config.Config Disabled { get; set; }
+
+        public static DisabledConfig Instance;
+
+        public static void Load()
+        {
+            Disabled = Config.Config.GetConfigFor("Disabled Mods", "json");
+            Instance = Disabled.Generated<DisabledConfig>();
+        }
+
+        public virtual bool Reset { get; set; } = true;
+
+        [NonNullable]
+        [UseConverter(typeof(CollectionConverter<string, HashSet<string>>))]
+        public virtual HashSet<string> DisabledModIds { get; set; } = new HashSet<string>();
+
+        protected internal virtual void Changed() { }
+        protected internal virtual IDisposable ChangeTransaction() => null;
+
+        private Task disableUpdateTask = null;
+        private int updateState = 0;
+
+        protected virtual void OnReload()
+        {
             if (DisabledModIds == null || Reset)
             {
                 DisabledModIds = new HashSet<string>();
                 Reset = false;
-            }
-        }
-    }
-}
+            }
+
+            var referToState = unchecked(++updateState);
+            var copy = DisabledModIds.ToArray();
+            if (disableUpdateTask == null || disableUpdateTask.IsCompleted)
+            {
+                disableUpdateTask = UpdateDisabledMods(copy);
+            }
+            else
+            {
+                disableUpdateTask = disableUpdateTask.ContinueWith(t =>
+                {
+                    // skip if another got here before the last finished
+                    if (referToState != updateState) return TaskEx.WhenAll();
+                    else return UpdateDisabledMods(copy);
+                });
+            }
+        }
+
+        private Task UpdateDisabledMods(string[] updateWithDisabled)
+        {
+            do
+            {
+                using var transaction = PluginManager.PluginStateTransaction();
+                var disabled = transaction.DisabledPlugins.ToArray();
+                foreach (var plugin in disabled)
+                    transaction.Enable(plugin, autoDeps: true);
+
+                var all = transaction.EnabledPlugins.ToArray();
+                foreach (var plugin in all.Where(m => updateWithDisabled.Contains(m.Id)))
+                    transaction.Disable(plugin, autoDependents: true);
+
+                try
+                {
+                    return transaction.Commit().ContinueWith(t =>
+                    {
+                        if (t.IsFaulted)
+                        {
+                            Logger.loader.Error("Error changing disabled plugins");
+                            Logger.loader.Error(t.Exception);
+                        }
+                    });
+                }
+                catch (InvalidOperationException)
+                {
+                    continue;
+                }
+            }
+            while (true);
+        }
+    }
+}