PluginManager/Loaders/EventsLoader.cs

@@ -0,0 +1,100 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+
+using PluginManager.Interfaces;
+
+namespace PluginManager.Loaders
+{
+    internal class EventsLoader
+    {
+
+        private readonly string EVPath;
+        private readonly string EVExtension;
+
+        internal delegate void onEventLoad(string name, bool success, DBEvent? ev = null, Exception? e = null);
+        internal delegate void onEventFileLoaded(string path);
+
+        /// <summary>
+        /// An event that is fired whenever a <see cref="DBEvent"/> event is loaded in memory
+        /// </summary>
+        internal onEventLoad? EventLoad;
+
+        /// <summary>
+        /// An event that is fired whenever a <see cref="DBEvent"/> event file is loaded
+        /// </summary>
+        internal onEventFileLoaded? EventFileLoaded;
+
+        /// <summary>
+        /// The Event Loader constructor
+        /// </summary>
+        /// <param name="path">The path to all events</param>
+        /// <param name="ext">The extension for events</param>
+        internal EventsLoader(string path, string ext)
+        {
+            EVPath = path;
+            EVExtension = ext;
+        }
+
+        /// <summary>
+        /// The method that loads all events
+        /// </summary>
+        /// <returns></returns>
+        internal List<DBEvent>? LoadEvents()
+        {
+
+            if (!Directory.Exists(EVPath))
+            {
+                Directory.CreateDirectory(EVPath);
+                return null;
+            }
+
+            string[] files = Directory.GetFiles(EVPath, $"*{EVExtension}", SearchOption.AllDirectories);
+
+            foreach (var file in files)
+            {
+                Assembly.LoadFile(Path.GetFullPath(file));
+                if (EventFileLoaded != null)
+                    EventFileLoaded.Invoke(file);
+            }
+
+            List<DBEvent> events = new List<DBEvent>();
+
+            try
+            {
+                Type interfaceType = typeof(DBEvent);
+                Type[] types = AppDomain.CurrentDomain.GetAssemblies()
+                                        .SelectMany(a => a.GetTypes())
+                                        .Where(p => interfaceType.IsAssignableFrom(p) && p.IsClass)
+                                        .ToArray();
+                foreach (Type type in types)
+                {
+                    try
+                    {
+                        DBEvent ev = (DBEvent)Activator.CreateInstance(type)!;
+                        events.Add(ev);
+
+                        if (EventLoad != null)
+                            EventLoad.Invoke(type.FullName!, true, ev, null);
+                    }
+                    catch (Exception e)
+                    {
+                        if (EventLoad != null)
+                            EventLoad.Invoke(type.FullName!, false, null, e);
+                    }
+
+                }
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(ex.Message);
+                return null;
+            }
+
+            return events;
+
+        }
+    }
+}