Update app.py

app.py

@@ -1,8 +1,42 @@
 import subprocess
 import gradio as gr
+import platform
+import os
+
+def install_flutter():
+    if platform.system() == "Windows":
+        # Download the Flutter installation bundle
+        subprocess.check_call(["powershell", "curl", "-o", "flutter_windows_stable.zip", "https://storage.googleapis.com/flutter_infra/releases/stable/windows/flutter_windows_stable.zip"])
+        
+        # Extract the zip file
+        subprocess.check_call(["powershell", "Expand-Archive", "-Path", "flutter_windows_stable.zip", "-DestinationPath", "C:\\src\\flutter"])
+        
+        # Update the system's PATH environment variable
+        subprocess.check_call(["powershell", "setx", "PATH", "%PATH%;C:\\src\\flutter\\bin"])
+        
+    elif platform.system() == "Darwin":  # macOS
+        # Install Flutter using Homebrew
+        subprocess.check_call(["brew", "install", "--cask", "flutter"])
+        
+    elif platform.system() == "Linux":
+        # Download the Flutter installation bundle
+        subprocess.check_call(["wget", "https://storage.googleapis.com/flutter_infra/releases/stable/linux/flutter_linux_stable.tar.xz"])
+        
+        # Extract the tar file
+        subprocess.check_call(["tar", "xvf", "flutter_linux_stable.tar.xz", "-C", "~/development/"])
+        
+        # Update the system's PATH environment variable
+        with open(os.path.expanduser("~/.bashrc"), "a") as f:
+            f.write("export PATH=$PATH:~/development/flutter/bin")
+        
+        subprocess.check_call(["source", "~/.bashrc"])
 
 def build_android_app(app_name, package_name, website_url, app_logo):
     try:
+        # Install Flutter if it's not already installed
+        if not subprocess.check_output(["which", "flutter"]).decode("utf-8"):
+            install_flutter()
+        
         # Create a new Android app
         subprocess.check_call(["flutter", "create", app_name])