Adding loader support

src/main/java/dev/brighten/ac/utils/MiscUtils.java

@@ -31,8 +31,11 @@ import java.lang.reflect.Field;
 import java.text.SimpleDateFormat;
 import java.util.*;
 import java.util.function.Supplier;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
 import java.util.stream.Collectors;
 import java.util.stream.LongStream;
+import java.util.zip.ZipException;
 
 public class MiscUtils {
 
@@ -423,6 +426,64 @@ public class MiscUtils {
         return false;
     }
 
+    public static Map<String, byte[]> loadJar(File jarFile) {
+        try {
+            Map<String, byte[]> classes = new HashMap<>();
+            JarFile jar = new JarFile(jarFile);
+            Enumeration<JarEntry> enumeration = jar.entries();
+            while (enumeration.hasMoreElements()) {
+                JarEntry entry = enumeration.nextElement();
+                readJar(jar, entry, classes, null);
+            }
+            jar.close();
+            return classes;
+        } catch (ZipException e) {
+            return null;
+        }
+        catch (IOException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    private static Map<String, byte[]> readJar(JarFile jar, JarEntry en, Map<String, byte[]> classes, List<String> ignored) {
+        String name = en.getName();
+        try (InputStream jis = jar.getInputStream(en)) {
+            if (name.endsWith(".class")) {
+                if (ignored != null) {
+                    for (String s : ignored) {
+                        if (name.startsWith(s)) {
+                            return classes;
+                        }
+                    }
+                }
+                byte[] bytes = getBytes(jis);
+                try {
+                    classes.put(name, bytes);
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return classes;
+    }
+
+    private static byte[] getBytes(InputStream inputStream) {
+        try {
+            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+            int nRead;
+            byte[] data = new byte[16384];
+            while ((nRead = inputStream.read(data, 0, data.length)) != -1) {
+                buffer.write(data, 0, nRead);
+            }
+            return buffer.toByteArray();
+        } catch (IOException e) {
+            return new byte[0];
+        }
+    }
+
     public static <T> T parseObjectFromString(String s, Class<T> clazz) throws Exception {
         return clazz.getConstructor(new Class[] {String.class}).newInstance(s);
     }
@@ -483,7 +544,7 @@ public class MiscUtils {
         for (final File f : pluginDir.listFiles()) {
             try {
                 if (f.getName().endsWith(".jar")) {
-                    final PluginDescriptionFile pdf = Anticheat.INSTANCE.getPluginLoader().getPluginDescription(f);
+                    final PluginDescriptionFile pdf = Anticheat.INSTANCE.getPluginInstance().getPluginLoader().getPluginDescription(f);
                     if (pdf.getDepend().contains("Atlas")) {
                         plugins.add(f);
                     }
@@ -509,7 +570,7 @@ public class MiscUtils {
             for (final File f : pluginDir.listFiles()) {
                 try {
                     if (f.getName().endsWith(".jar")) {
-                        final PluginDescriptionFile pdf = Anticheat.INSTANCE.getPluginLoader().getPluginDescription(f);
+                        final PluginDescriptionFile pdf = Anticheat.INSTANCE.getPluginInstance().getPluginLoader().getPluginDescription(f);
                         if (pdf.getName().equalsIgnoreCase(pl)) {
                             pluginFile = f;
                             msg = "(via search) ";