app.py

import gradio as gr
from huggingface_hub import HfApi, snapshot_download
from huggingface_hub.utils import HfHubHTTPError, RepositoryNotFoundError
import os
import uuid
import shutil
import tempfile

# --- State Management and API Client ---

def get_hf_api(token):
    """Initializes the HfApi client. Allows read-only operations if no token is provided."""
    return HfApi(token=token if token else None)

# --- UI Functions (Original Tab) ---

def handle_token_change(token):
    """
    Called when the token is entered. Fetches user info and updates UI interactivity.
    """
    if not token:
        # No token, disable write actions and clear user-specific info
        update_dict = {
            manage_files_btn: gr.update(interactive=False),
            delete_repo_btn: gr.update(interactive=False),
            commit_btn: gr.update(interactive=False),
            author_input: gr.update(value=""),
            whoami_output: gr.update(value=None, visible=False)
        }
        return (None, "", *update_dict.values())

    try:
        api = get_hf_api(token)
        user_info = api.whoami()
        username = user_info.get('name')
        
        # Token is valid, enable write actions and set author
        update_dict = {
            manage_files_btn: gr.update(interactive=True),
            delete_repo_btn: gr.update(interactive=True),
            commit_btn: gr.update(interactive=True),
            author_input: gr.update(value=username),
            whoami_output: gr.update(value=user_info, visible=True)
        }
        return (token, username, *update_dict.values())

    except HfHubHTTPError as e:
        gr.Warning(f"Invalid Token: {e}. You can only perform read-only actions.")
        update_dict = {
            manage_files_btn: gr.update(interactive=False),
            delete_repo_btn: gr.update(interactive=False),
            commit_btn: gr.update(interactive=False),
            whoami_output: gr.update(value=None, visible=False)
        }
        return (token, "", *update_dict.values())


def list_repos(token, author, repo_type):
    """Lists repositories for a given author and type."""
    if not author:
        gr.Info("Please enter an author (username or organization) to list repositories.")
        return gr.update(choices=[], value=None), gr.update(visible=False), gr.update(visible=False)
    try:
        api = get_hf_api(token)
        # Use the dedicated list functions for clarity e.g. api.list_models, api.list_spaces
        list_fn = getattr(api, f"list_{repo_type}s")
        repos = list_fn(author=author)
        repo_ids = [repo.id for repo in repos]
        return gr.update(choices=repo_ids, value=None), gr.update(visible=False), gr.update(visible=False)
    except HfHubHTTPError as e:
        gr.Error(f"Could not list repositories: {e}")
        return gr.update(choices=[], value=None), gr.update(visible=False), gr.update(visible=False)

def handle_repo_selection(repo_id):
    """Called when a repo is selected. Makes action buttons visible."""
    if repo_id:
        return gr.update(visible=True), gr.update(visible=False) # Show actions, hide editor
    return gr.update(visible=False), gr.update(visible=False) # Hide everything

def delete_repo(token, repo_id, repo_type):
    """Deletes the selected repository."""
    if not token:
        gr.Error("A write-enabled Hugging Face token is required to delete a repository.")
        return repo_id, gr.update(visible=True), gr.update(visible=False)
    if not repo_id:
        gr.Warning("No repository selected to delete.")
        return repo_id, gr.update(visible=True), gr.update(visible=False)
    try:
        api = get_hf_api(token)
        api.delete_repo(repo_id=repo_id, repo_type=repo_type)
        gr.Info(f"Successfully deleted '{repo_id}'.")
        return None, gr.update(visible=False), gr.update(visible=False)
    except HfHubHTTPError as e:
        gr.Error(f"Failed to delete repository: {e}")
        return repo_id, gr.update(visible=True), gr.update(visible=False)

# --- File Editor Functions (Original Tab) ---

def show_file_manager(token, repo_id, repo_type):
    if not repo_id:
        gr.Warning("No repository selected.")
        return gr.update(visible=False), gr.update(), gr.update(), gr.update()
    try:
        api = get_hf_api(token)
        repo_files = api.list_repo_files(repo_id=repo_id, repo_type=repo_type)
        filtered_files = [f for f in repo_files if not f.startswith('.')]
        return (
            gr.update(visible=True), gr.update(choices=filtered_files, value=None),
            gr.update(value="## Select a file to view or edit.", language='markdown'), ""
        )
    except Exception as e:
        gr.Error(f"Could not list files: {e}")
        return gr.update(visible=False), gr.update(), gr.update(), gr.update()

def load_file_content(token, repo_id, repo_type, filepath):
    if not filepath:
        return gr.update(value="## Select a file to view its content.", language='markdown')
    try:
        api = get_hf_api(token)
        local_path = api.hf_hub_download(repo_id=repo_id, repo_type=repo_type, filename=filepath, token=token)
        with open(local_path, 'r', encoding='utf-8') as f: content = f.read()
        language = os.path.splitext(filepath)[1].lstrip('.').lower()
        if language == 'py': language = 'python'
        if language == 'js': language = 'javascript'
        if language == 'md': language = 'markdown'
        else: language = 'python'
        return gr.update(value=content, language=language)
    except Exception as e:
        return gr.update(value=f"Error loading file: {e}", language='plaintext')

def commit_file(token, repo_id, repo_type, filepath, content, commit_message):
    if not token: gr.Error("A write-enabled token is required."); return
    if not filepath: gr.Warning("No file selected."); return
    if not commit_message: gr.Warning("Commit message cannot be empty."); return
    try:
        api = get_hf_api(token)
        api.upload_file(
            path_or_fileobj=bytes(content, 'utf-8'), path_in_repo=filepath,
            repo_id=repo_id, repo_type=repo_type, commit_message=commit_message,
        )
        gr.Info(f"Successfully committed '{filepath}' to '{repo_id}'!")
    except Exception as e:
        gr.Error(f"Failed to commit file: {e}")

# --- Download Tab Functions ---

def list_spaces_for_download(token, author):
    """Lists spaces for a given author to populate the dropdown."""
    if not author:
        gr.Info("Please enter an author (username or organization) to list spaces.")
        return gr.update(choices=[], value=None)
    try:
        api = get_hf_api(token)
        spaces = api.list_spaces(author=author)
        repo_ids = [space.id for space in spaces]
        if not repo_ids:
            gr.Warning(f"No Spaces found for author '{author}'.")
        return gr.update(choices=repo_ids, value=None)
    except RepositoryNotFoundError:
        gr.Warning(f"Author '{author}' not found or has no public spaces.")
        return gr.update(choices=[], value=None)
    except HfHubHTTPError as e:
        gr.Error(f"Could not list spaces: {e}")
        return gr.update(choices=[], value=None)

def download_spaces_as_zip(token, selected_space_ids, progress=gr.Progress()):
    """Downloads selected spaces and zips them up."""
    if not selected_space_ids:
        gr.Warning("No spaces selected for download.")
        return gr.update(visible=False, value=None)

    # Create a temporary directory for all the downloaded content
    download_root_dir = tempfile.mkdtemp()
    
    try:
        total_spaces = len(selected_space_ids)
        progress(0, desc="Starting download...")

        # 1. Download each space into a dedicated subfolder within the temp directory
        for i, repo_id in enumerate(selected_space_ids):
            progress((i) / total_spaces, desc=f"Downloading {repo_id} ({i+1}/{total_spaces})")
            
            # Sanitize repo_id to create a valid folder name for the zip
            folder_name = repo_id.replace("/", "__")
            target_path = os.path.join(download_root_dir, folder_name)

            try:
                # Use snapshot_download to get the entire repo efficiently
                snapshot_download(
                    repo_id=repo_id,
                    repo_type="space",
                    local_dir=target_path,
                    token=token,
                    local_dir_use_symlinks=False, # Crucial for zipping
                    resume_download=True,
                )
            except Exception as e:
                # Log the error and skip this repo
                gr.Error(f"Failed to download {repo_id}: {e}")
                continue

        # 2. Create the zip archive from the directory of downloaded spaces
        progress(0.95, desc="All spaces downloaded. Creating ZIP file...")
        
        # We create the zip file outside the download dir so we can clean up easily
        zip_base_name = os.path.join(tempfile.gettempdir(), f"hf_spaces_archive_{uuid.uuid4().hex}")
        
        # shutil.make_archive returns the full path to the created archive
        zip_path = shutil.make_archive(
            base_name=zip_base_name,
            format='zip',
            root_dir=download_root_dir # This becomes the root of the zip
        )
        
        progress(1, desc="Download ready!")
        gr.Info("ZIP file created successfully!")
        
        # Return the path to the zip file and make the component visible
        return gr.update(value=zip_path, visible=True)

    finally:
        # 3. Clean up the large download directory, regardless of success or failure
        shutil.rmtree(download_root_dir, ignore_errors=True)

# --- Gradio UI Layout ---
with gr.Blocks(theme=gr.themes.Soft(primary_hue="blue"), title="Hugging Face Hub Toolkit") as demo:
    # State management
    hf_token_state = gr.State(None)
    author_state = gr.State("")
    selected_repo_id = gr.State(None)
    selected_repo_type = gr.State("space") # Default

    gr.Markdown("# Hugging Face Hub Toolkit")
    gr.Markdown("An intuitive interface to manage your Hugging Face repositories. **Enter a write-token for full access.**")

    with gr.Sidebar():
        hf_token = gr.Textbox(label="Hugging Face API Token", type="password", placeholder="hf_...", scale=3)
        whoami_output = gr.JSON(label="Authenticated User", visible=False, scale=1)

    with gr.Tabs():
        with gr.TabItem("Manage Repositories"):
            with gr.Row(equal_height=False):
                with gr.Column(scale=1):
                    gr.Markdown("### 1. Select a Repository")
                    author_input = gr.Textbox(label="Author (Username or Org)", interactive=True)
                    repo_selector = gr.Radio(label="Select a Repository", interactive=True, value=None)
                    with gr.Tabs() as repo_type_tabs:
                        for repo_type, label in [("space", "Spaces"), ("model", "Models"), ("dataset", "Datasets")]:
                            with gr.Tab(label, id=repo_type):
                                btn = gr.Button(f"List {label}")
                                btn.click(
                                    fn=list_repos,
                                    inputs=[hf_token_state, author_input, gr.State(repo_type)],
                                    outputs=[repo_selector, gr.Column(), gr.Column()] # Dummy outputs for panels to hide them
                                ).then(fn=lambda author: author, inputs=author_input, outputs=author_state)
                
                with gr.Column(scale=3):
                    with gr.Column(visible=False) as action_panel:
                        gr.Markdown("### 2. Choose an Action")
                        with gr.Row():
                            manage_files_btn = gr.Button("Manage Files", interactive=False, scale=1)
                            delete_repo_btn = gr.Button("Delete This Repo", variant="stop", interactive=False, scale=1)
                    
                    with gr.Column(visible=False) as editor_panel:
                        gr.Markdown("### 3. Edit Files")
                        file_selector = gr.Dropdown(label="Select File", interactive=_True)
                        code_editor = gr.Code(label="File Content", language="markdown", interactive=True)
                        commit_message_input = gr.Textbox(label="Commit Message", placeholder="e.g., Update README.md", interactive=True)
                        commit_btn = gr.Button("Commit Changes", variant="primary", interactive=False)

        with gr.TabItem("Download Spaces (ZIP)"):
            gr.Markdown("## Bulk Download Spaces as a ZIP Archive")
            gr.Markdown("Select one or more Spaces from an author to download them as a single ZIP file. Each Space will be in its own folder inside the archive.")
            
            with gr.Row():
                download_author_input = gr.Textbox(
                    label="Author (Username or Org)", 
                    interactive=True, 
                    placeholder="e.g., huggingface-projects or osanseviero"
                )
                list_spaces_btn = gr.Button("List Spaces", variant="secondary")

            spaces_dropdown = gr.Dropdown(label="Available Spaces", info="Select the spaces you want to download.", multiselect=True, interactive=True)
            download_btn = gr.Button("Download Selected Spaces as ZIP", variant="primary")
            download_output_file = gr.File(label="Your Downloaded ZIP File", visible=False)
            
            # --- Event Handlers for Download Tab ---
            list_spaces_btn.click(
                fn=list_spaces_for_download,
                inputs=[hf_token_state, download_author_input],
                outputs=[spaces_dropdown]
            )

            download_btn.click(
                fn=download_spaces_as_zip,
                inputs=[hf_token_state, spaces_dropdown],
                outputs=[download_output_file]
            )

    # --- Event Handlers (Original Tab) ---
    hf_token.change(
        fn=handle_token_change, inputs=hf_token,
        outputs=[hf_token_state, author_state, manage_files_btn, delete_repo_btn, commit_btn, author_input, whoami_output]
    )
    repo_type_tabs.select(
        fn=lambda rt: (rt, None, gr.update(choices=[], value=None), gr.update(visible=False), gr.update(visible=False)),
        inputs=repo_type_tabs,
        outputs=[selected_repo_type, selected_repo_id, repo_selector, action_panel, editor_panel]
    )
    repo_selector.select(
        fn=lambda repo_id: (repo_id, *handle_repo_selection(repo_id)),
        inputs=repo_selector, outputs=[selected_repo_id, action_panel, editor_panel]
    )
    manage_files_btn.click(
        fn=show_file_manager, inputs=[hf_token_state, selected_repo_id, selected_repo_type],
        outputs=[editor_panel, file_selector, code_editor, commit_message_input]
    )
    delete_repo_btn.click(
        fn=delete_repo, inputs=[hf_token_state, selected_repo_id, selected_repo_type],
        outputs=[selected_repo_id, action_panel, editor_panel],
        js="() => confirm('Are you sure you want to permanently delete this repository? This action cannot be undone.')"
    ).then(
        fn=list_repos,
        inputs=[hf_token_state, author_state, selected_repo_type],
        outputs=[repo_selector, action_panel, editor_panel]
    )
    file_selector.change(
        fn=load_file_content, inputs=[hf_token_state, selected_repo_id, selected_repo_type, file_selector],
        outputs=code_editor
    )
    commit_btn.click(
        fn=commit_file,
        inputs=[hf_token_state, selected_repo_id, selected_repo_type, file_selector, code_editor, commit_message_input]
    )

if __name__ == "__main__":
    demo.launch(debug=True)