Initial implementation of configuration support for script plugins

Application/Misc/ScriptPluginConfigurationWrapper.cs

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+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Threading.Tasks;
+using IW4MAdmin.Application.Configuration;
+using Jint;
+using Jint.Native;
+using Newtonsoft.Json.Linq;
+
+namespace IW4MAdmin.Application.Misc
+{
+    public class ScriptPluginConfigurationWrapper
+    {
+        private readonly BaseConfigurationHandler<ScriptPluginConfiguration> _handler;
+        private readonly ScriptPluginConfiguration _config;
+        private readonly string _pluginName;
+        private readonly Engine _scriptEngine;
+
+        public ScriptPluginConfigurationWrapper(string pluginName, Engine scriptEngine)
+        {
+            _handler = new BaseConfigurationHandler<ScriptPluginConfiguration>("ScriptPluginSettings");
+            _config = _handler.Configuration() ??
+                      (ScriptPluginConfiguration) new ScriptPluginConfiguration().Generate();
+            _pluginName = pluginName;
+            _scriptEngine = scriptEngine;
+        }
+
+        private static int? AsInteger(double d)
+        {
+            return int.TryParse(d.ToString(CultureInfo.InvariantCulture), out var parsed) ? parsed : (int?) null;
+        }
+
+        public async Task SetValue(string key, object value)
+        {
+            var castValue = value;
+
+            if (value is double d)
+            {
+                castValue = AsInteger(d) ?? value;
+            }
+
+            if (value is object[] array && array.All(item => item is double d && AsInteger(d) != null))
+            {
+                castValue = array.Select(item => (int) item).ToArray();
+            }
+
+            if (!_config.ContainsKey(_pluginName))
+            {
+                _config.Add(_pluginName, new Dictionary<string, object>());
+            }
+
+            var plugin = _config[_pluginName];
+
+            if (plugin.ContainsKey(key))
+            {
+                plugin[key] = castValue;
+            }
+
+            else
+            {
+                plugin.Add(key, castValue);
+            }
+
+            _handler.Set(_config);
+            await _handler.Save();
+        }
+
+        public JsValue GetValue(string key)
+        {
+            if (!_config.ContainsKey(_pluginName))
+            {
+                return JsValue.Undefined;
+            }
+
+            if (!_config[_pluginName].ContainsKey(key))
+            {
+                return JsValue.Undefined;
+            }
+
+            var item = _config[_pluginName][key];
+
+            if (item is JArray array)
+            {
+                item = array.ToObject<List<dynamic>>();
+            }
+
+            return JsValue.FromObject(_scriptEngine, item);
+        }
+    }
+}