Create app.py

app.py

@@ -0,0 +1,53 @@
+from __future__ import annotations
+import gradio as gr
+import numpy as np
+from PIL import Image
+from pathlib import Path
+import secrets
+import shutil
+
+current_dir = Path(__file__).parent
+
+
+def generate_random_img(history: list[Image.Image], request: gr.Request):
+    """Generate a random red, green, blue, orange, yellor or purple image."""
+    colors = [(255, 0, 0), (0, 255, 0), (0, 0, 255), (255, 165, 0), (255, 255, 0), (128, 0, 128)]
+    color = colors[np.random.randint(0, len(colors))]
+    img = Image.new('RGB', (100, 100), color)
+    
+    user_dir: Path = current_dir / request.username # type: ignore
+    user_dir.mkdir(exist_ok=True)
+    path = user_dir / f"{secrets.token_urlsafe(8)}.webp"
+
+    img.save(path)
+    history.append(img)
+
+    return img, history, history
+
+def delete_directory(req: gr.Request):
+    if not req.username:
+        return
+    user_dir: Path = current_dir / req.username
+    shutil.rmtree(str(user_dir))
+
+with gr.Blocks() as demo:
+    gr.Markdown("""# State Cleanup Demo
+                🖼️ Images are saved in a user-specific directory and deleted when the users closes the page via demo.unload.
+                """)
+    with gr.Row():
+        with gr.Column(scale=1):
+            with gr.Row():
+                img = gr.Image(label="Generated Image", height=300, width=300)
+            with gr.Row():
+                gen = gr.Button(value="Generate")
+            with gr.Row():
+                history = gr.Gallery(label="Previous Generations", height=500, columns=10)
+                state = gr.State(value=[], delete_callback=lambda v: print("STATE DELETED"))
+
+    demo.load(generate_random_img, [state], [img, state, history]) 
+    gen.click(generate_random_img, [state], [img, state, history])
+    demo.unload(delete_directory)
+
+
+demo.launch(auth=lambda user,pwd: True,
+            auth_message="Enter any username and password to continue")