Merge branch 'main' of https://github.com/NightTripperID/java-discord-api into update-cache-with-response

# Conflicts:
#	api/src/main/java/com/javadiscord/jdi/core/api/DiscordResponseParser.java
#	core/src/main/java/com/javadiscord/jdi/core/Guild.java

Author: NightTripperID

annotations/src/main/java/com/javadiscord/jdi/core/processor/ClassFileUtil.java

@@ -1,15 +1,15 @@
 package com.javadiscord.jdi.core.processor;
 
-import javassist.bytecode.ClassFile;
-
 import java.io.DataInputStream;
 import java.io.File;
 import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
+import javassist.bytecode.ClassFile;
 
 public class ClassFileUtil {
 
@@ -21,15 +21,21 @@ public static List<File> getClassesInClassPath() {
         String[] classpathEntries = classpath.split(File.pathSeparator);
         for (String entry : classpathEntries) {
             File file = new File(entry);
-            classes.addAll(getClasses(file));
+            try {
+                classes.addAll(getClasses(file));
+            } catch (IOException ignore) {
+                /* Ignore */
+            }
         }
         return classes;
     }
 
     public static String getClassName(File file) throws IOException {
         String className = null;
-        try (FileInputStream fis = new FileInputStream(file);
-                DataInputStream dis = new DataInputStream(fis)) {
+        try (
+            FileInputStream fis = new FileInputStream(file);
+            DataInputStream dis = new DataInputStream(fis)
+        ) {
             if (isJarFile(file)) {
                 try (ZipInputStream zip = new ZipInputStream(fis)) {
                     ZipEntry entry;
@@ -47,21 +53,44 @@ public static String getClassName(File file) throws IOException {
         return className;
     }
 
-    private static List<File> getClasses(File file) {
-        List<File> classes = new ArrayList<>();
+    private static List<File> getClasses(File file) throws IOException {
+        List<File> classFiles = new ArrayList<>();
         if (file.isDirectory()) {
-            File[] files = file.listFiles();
-            if (files != null) {
-                for (File f : files) {
-                    classes.addAll(getClasses(f));
-                }
+            classFiles.addAll(getClassesFromDirectory(file));
+        } else if (isJarFile(file)) {
+            classFiles.addAll(getClassesFromJar(file));
+        } else if (file.getName().endsWith(".class")) {
+            classFiles.add(file);
+        }
+        return classFiles;
+    }
+
+    private static List<File> getClassesFromDirectory(File directory) throws IOException {
+        List<File> classFiles = new ArrayList<>();
+        File[] files = directory.listFiles();
+        if (files != null) {
+            for (File file : files) {
+                classFiles.addAll(getClasses(file));
             }
-        } else {
-            if (file.getName().endsWith(".class")) {
-                classes.add(file);
+        }
+        return classFiles;
+    }
+
+    private static List<File> getClassesFromJar(File jarFile) throws IOException {
+        List<File> classFiles = new ArrayList<>();
+        try (
+            FileInputStream fis = new FileInputStream(jarFile);
+            ZipInputStream zip = new ZipInputStream(fis)
+        ) {
+            ZipEntry entry;
+            while ((entry = zip.getNextEntry()) != null) {
+                if (!entry.isDirectory() && entry.getName().endsWith(".class")) {
+                    File tempFile = extractClassFileFromJar(zip, entry.getName());
+                    classFiles.add(tempFile);
+                }
             }
         }
-        return classes;
+        return classFiles;
     }
 
     private static boolean isJarFile(File file) {
@@ -75,4 +104,20 @@ private static String extractClassName(DataInputStream dis) throws IOException {
     private static String extractClassName(ZipInputStream zip) throws IOException {
         return new ClassFile(new DataInputStream(zip)).getName();
     }
+
+    private static File extractClassFileFromJar(
+        ZipInputStream zip,
+        String entryName
+    ) throws IOException {
+        File tempFile = File.createTempFile(entryName.replace('/', '_'), ".class");
+        tempFile.deleteOnExit();
+        try (FileOutputStream fos = new FileOutputStream(tempFile)) {
+            byte[] buffer = new byte[1024];
+            int len;
+            while ((len = zip.read(buffer)) > 0) {
+                fos.write(buffer, 0, len);
+            }
+        }
+        return tempFile;
+    }
 }