External plugin loading setup

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

manifest

@@ -0,0 +1 @@
+Main-Class: TestPlugin

plugins/TestPlugin.java

@@ -1,3 +1,5 @@
 public class TestPlugin {
-    
+    public TestPlugin() {
+        System.out.println("Loaded me!");
+    }
 }

src/sig/PluginLoader.java

@@ -1,6 +1,10 @@
 package sig;
 
 import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
 import java.nio.file.Files;
 import java.nio.file.Path;
 
@@ -8,9 +12,22 @@ public class PluginLoader {
     public static void LoadPlugins() {
         Path p = Path.of("..","plugins");
         try {
-            Files.walk(p).filter((f)->Files.isRegularFile(f)).forEach((f)->{System.out.println("Found "+f);});
+            Files.walk(p).filter((f)->Files.isRegularFile(f)&&f.getFileName().toString().contains(".jar")).forEach((f)->{
+                LoadPlugin(f);
+            });
         } catch (IOException e) {
             e.printStackTrace();
         }
     }
+
+    private static void LoadPlugin(Path f) {
+        try {
+            System.out.println("Loading "+f);
+            URL l = f.toUri().toURL();
+            URLClassLoader loader = new URLClassLoader(new URL[]{l});
+            Object newPlugin = Class.forName(f.getFileName().toString().replace(".jar",""),true,loader).getDeclaredConstructor().newInstance();
+        } catch (MalformedURLException | InstantiationException | IllegalAccessException | ClassNotFoundException | IllegalArgumentException | InvocationTargetException | NoSuchMethodException | SecurityException e) {
+            e.printStackTrace();
+        }
+    }
 }