From 130c05e56b1a0516c743e25257e9a02b8c0055e6 Mon Sep 17 00:00:00 2001
From: RaidMax <raidmax@live.com>
Date: Tue, 4 Apr 2023 21:44:08 -0500
Subject: [PATCH] add configuration watcher implementation

---
 Application/IO/ConfigurationWatcher.cs | 60 ++++++++++++++++++++++++++
 Application/Main.cs                    |  1 +
 2 files changed, 61 insertions(+)
 create mode 100644 Application/IO/ConfigurationWatcher.cs

diff --git a/Application/IO/ConfigurationWatcher.cs b/Application/IO/ConfigurationWatcher.cs
new file mode 100644
index 00000000..979b7e60
--- /dev/null
+++ b/Application/IO/ConfigurationWatcher.cs
@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using SharedLibraryCore;
+
+namespace IW4MAdmin.Application.IO;
+
+public sealed class ConfigurationWatcher : IDisposable
+{
+    private readonly FileSystemWatcher _watcher;
+    private readonly Dictionary<string, Action<string>> _registeredActions = new();
+
+    public ConfigurationWatcher()
+    {
+        _watcher = new FileSystemWatcher
+        {
+            Path = Path.Join(Utilities.OperatingDirectory, "Configuration"),
+            Filter = "*.json",
+            NotifyFilter = NotifyFilters.LastWrite
+        };
+
+        _watcher.Changed += WatcherOnChanged;
+        _watcher.EnableRaisingEvents = true;
+    }
+
+    public void Dispose()
+    {
+        _watcher.Changed -= WatcherOnChanged;
+        _watcher.Dispose();
+    }
+
+    public void Register(string fileName, Action<string> fileUpdated)
+    {
+        if (_registeredActions.ContainsKey(fileName))
+        {
+            return;
+        }
+
+        _registeredActions.Add(fileName, fileUpdated);
+    }
+
+    public void Unregister(string fileName)
+    {
+        if (_registeredActions.ContainsKey(fileName))
+        {
+            _registeredActions.Remove(fileName);
+        }
+    }
+
+    private void WatcherOnChanged(object sender, FileSystemEventArgs eventArgs)
+    {
+        if (!_registeredActions.ContainsKey(eventArgs.FullPath) || eventArgs.ChangeType != WatcherChangeTypes.Changed ||
+            new FileInfo(eventArgs.FullPath).Length == 0)
+        {
+            return;
+        }
+
+        _registeredActions[eventArgs.FullPath].Invoke(eventArgs.FullPath);
+    }
+}
diff --git a/Application/Main.cs b/Application/Main.cs
index 1d799110..e0ba9fde 100644
--- a/Application/Main.cs
+++ b/Application/Main.cs
@@ -29,6 +29,7 @@ using Data.Helpers;
 using Integrations.Source.Extensions;
 using IW4MAdmin.Application.Alerts;
 using IW4MAdmin.Application.Extensions;
+using IW4MAdmin.Application.IO;
 using IW4MAdmin.Application.Localization;
 using IW4MAdmin.Application.Plugin;
 using IW4MAdmin.Application.Plugin.Script;