File Management

class LocalFileStorage:
    def __init__(self, base_path):
        """
        Initialize local filesystem storage backend.
        
        Args:
            base_path (str): Base directory path for file operations
        """
    
    def get_base_path(self):
        """
        Get base directory path.
        
        Returns:
            str: Base directory path
        """
    
    def make_dir(self, path, directory):
        """
        Create directory.
        
        Args:
            path (str): Parent directory path
            directory (str): New directory name
            
        Returns:
            bool: True if successful
        """
    
    def get_files(self, path, directory):
        """
        List files and directories in given path.
        
        Args:
            path (str): Directory path to list
            directory (str): Directory name
            
        Returns:
            list: File and directory information
        """
    
    def delete_tree(self, directory):
        """
        Delete directory recursively.
        
        Args:
            directory (str): Directory path to delete
            
        Returns:
            bool: True if successful
        """
    
    def delete_file(self, file_path):
        """
        Delete single file.
        
        Args:
            file_path (str): Path to file to delete
            
        Returns:
            bool: True if successful
        """
    
    def path_exists(self, path):
        """
        Check if path exists.
        
        Args:
            path (str): Path to check
            
        Returns:
            bool: True if path exists
        """
    
    def rename_path(self, src, dst):
        """
        Rename file or directory.
        
        Args:
            src (str): Source path
            dst (str): Destination path
            
        Returns:
            bool: True if successful
        """
    
    def is_dir(self, path):
        """
        Check if path is directory.
        
        Args:
            path (str): Path to check
            
        Returns:
            bool: True if path is directory
        """
    
    def send_file(self, file_path):
        """
        Send file to user for download.
        
        Args:
            file_path (str): Path to file
            
        Returns:
            Response: Flask file response
        """
    
    def read_file(self, path):
        """
        Read file contents.
        
        Args:
            path (str): File path to read
            
        Returns:
            str: File contents as string
        """
    
    def write_file(self, path, content):
        """
        Write content to file.
        
        Args:
            path (str): File path to write
            content (str): Content to write
            
        Returns:
            bool: True if successful
        """
    
    def save_file(self, path, file_data):
        """
        Save uploaded file data.
        
        Args:
            path (str): Destination file path
            file_data: File data from upload
            
        Returns:
            bool: True if successful
        """

class BaseFileAdmin(BaseView, ActionsMixin):
    def __init__(
        self,
        base_url=None,
        name=None,
        category=None,
        endpoint=None,
        url=None,
        verify_path=True,
        menu_class_name=None,
        menu_icon_type=None,
        menu_icon_value=None,
        storage=None
    ):
        """
        Initialize base file administration interface.
        
        Args:
            base_url (str, optional): Base URL for file serving
            name (str, optional): View name for menu
            category (str, optional): Menu category
            endpoint (str, optional): Blueprint endpoint
            url (str, optional): URL prefix
            verify_path (bool): Verify path accessibility
            menu_class_name (str, optional): Menu CSS class
            menu_icon_type (str, optional): Icon type
            menu_icon_value (str, optional): Icon identifier
            storage: Storage backend instance
        """
    
    # Permission configuration
    can_upload = True              # Allow file uploads
    can_download = True            # Allow file downloads
    can_delete = True              # Allow file deletion
    can_delete_dirs = True         # Allow directory deletion
    can_mkdir = True               # Allow directory creation
    can_rename = True              # Allow renaming files/directories
    
    # File type restrictions
    allowed_extensions = None      # Allowed file extensions (None = all)
    editable_extensions = ('md', 'txt', 'py', 'js', 'html', 'css', 'json', 'xml', 'yaml', 'yml', 'ini', 'cfg')
    
    # Interface configuration
    list_template = 'admin/file/list.html'
    upload_template = 'admin/file/upload.html'
    mkdir_template = 'admin/file/mkdir.html'
    
    def is_accessible_path(self, path):
        """
        Check if path is accessible for current user.
        
        Args:
            path (str): Path to check
            
        Returns:
            bool: True if accessible
        """
    
    def get_base_path(self):
        """
        Get base path for file operations.
        
        Returns:
            str: Base path
        """
    
    def is_file_allowed(self, filename):
        """
        Check if file upload is permitted based on extension.
        
        Args:
            filename (str): Filename to check
            
        Returns:
            bool: True if allowed
        """
    
    def is_file_editable(self, filename):
        """
        Check if file can be edited inline.
        
        Args:
            filename (str): Filename to check
            
        Returns:
            bool: True if editable
        """
    
    # View methods (exposed via @expose decorator)
    def index(self):
        """
        File browser index view.
        
        Returns:
            str: Rendered file browser template
        """
    
    def upload(self):
        """
        File upload view.
        
        Returns:
            str: Rendered upload template or redirect
        """
    
    def download(self):
        """
        File download view.
        
        Returns:
            Response: File download response
        """
    
    def edit(self):
        """
        File edit view for text files.
        
        Returns:
            str: Rendered edit template or redirect
        """
    
    def rename(self):
        """
        Rename file or directory view.
        
        Returns:
            str: Rendered rename template or redirect
        """
    
    def mkdir(self):
        """
        Create directory view.
        
        Returns:
            str: Rendered mkdir template or redirect
        """
    
    # Action methods
    def action_delete(self, items):
        """
        Batch delete action for selected files/directories.
        
        Args:
            items (list): List of file/directory paths to delete
        """
    
    def action_edit(self, items):
        """
        Batch edit action for selected text files.
        
        Args:
            items (list): List of file paths to edit
        """

class FileAdmin(BaseFileAdmin):
    def __init__(self, base_path, *args, **kwargs):
        """
        Simple file management interface for local filesystem.
        
        Args:
            base_path (str): Base directory path to manage
            *args: Additional positional arguments
            **kwargs: Additional keyword arguments
        """

from flask_admin.contrib.fileadmin.s3 import S3Storage

class S3Storage:
    def __init__(
        self,
        bucket_name,
        region,
        aws_access_key_id,
        aws_secret_access_key
    ):
        """
        Amazon S3 storage backend.
        
        Parameters:
        - bucket_name: str, Name of the S3 bucket
        - region: str, AWS region where bucket is located
        - aws_access_key_id: str, AWS Access Key ID
        - aws_secret_access_key: str, AWS Secret Access Key
        """

from flask_admin.contrib.fileadmin.azure import AzureStorage

class AzureStorage:
    def __init__(self, container_name, connection_string):
        """
        Azure Blob Storage backend.
        
        Parameters:
        - container_name: str, Name of the Azure storage container
        - connection_string: str, Azure Blob Storage connection string
        """

from flask import Flask
from flask_admin import Admin
from flask_admin.contrib.fileadmin import FileAdmin
import os.path as op

app = Flask(__name__)
app.config['SECRET_KEY'] = 'secret-key'

# Initialize admin
admin = Admin(app, name='File Manager')

# Add file admin for uploads directory
path = op.join(op.dirname(__file__), 'uploads')
admin.add_view(FileAdmin(path, '/uploads/', name='Upload Files'))

# Add file admin for static files with restricted permissions
static_path = op.join(op.dirname(__file__), 'static')
admin.add_view(FileAdmin(
    static_path, 
    '/static/', 
    name='Static Files',
    category='Files'
))

from flask_admin.contrib.fileadmin import FileAdmin
from flask_login import current_user

class RestrictedFileAdmin(FileAdmin):
    # File type restrictions
    allowed_extensions = ('txt', 'md', 'py', 'js', 'css', 'html', 'json', 'xml')
    editable_extensions = ('txt', 'md', 'py', 'js', 'css', 'html', 'json')
    
    # Permission configuration
    can_upload = True
    can_download = True
    can_delete = False      # Disable deletion
    can_delete_dirs = False
    can_mkdir = True
    can_rename = True
    
    def is_accessible(self):
        """Only allow access to authenticated admin users."""
        return current_user.is_authenticated and current_user.is_admin
    
    def is_accessible_path(self, path):
        """Restrict access to certain directories."""
        # Prevent access to hidden directories
        if '/.git' in path or '/.env' in path:
            return False
        
        # Prevent access to Python cache directories
        if '__pycache__' in path:
            return False
            
        return super().is_accessible_path(path)
    
    def is_file_allowed(self, filename):
        """Additional file upload restrictions."""
        # Block executable files
        if filename.lower().endswith(('.exe', '.bat', '.sh', '.com')):
            return False
            
        return super().is_file_allowed(filename)

# Register with admin
uploads_path = op.join(op.dirname(__file__), 'uploads')
admin.add_view(RestrictedFileAdmin(
    uploads_path,
    '/uploads/',
    name='Managed Files',
    category='File Management'
))

from flask_admin.contrib.fileadmin import BaseFileAdmin, LocalFileStorage
import os
import shutil
from werkzeug.utils import secure_filename

class S3FileStorage:
    """Example custom storage backend for AWS S3."""
    
    def __init__(self, bucket_name, aws_access_key, aws_secret_key):
        """
        Initialize S3 storage backend.
        
        Args:
            bucket_name (str): S3 bucket name
            aws_access_key (str): AWS access key
            aws_secret_key (str): AWS secret key
        """
        self.bucket_name = bucket_name
        # Initialize S3 client here
        pass
    
    def get_files(self, path, directory):
        """List files in S3 bucket path."""
        # Implement S3 listing logic
        pass
    
    def save_file(self, path, file_data):
        """Upload file to S3."""
        # Implement S3 upload logic
        pass
    
    def delete_file(self, file_path):
        """Delete file from S3."""
        # Implement S3 deletion logic
        pass
    
    # Implement other required methods...

class CustomFileAdmin(BaseFileAdmin):
    def __init__(self, storage_config, *args, **kwargs):
        # Initialize with custom storage backend
        storage = S3FileStorage(**storage_config)
        super().__init__(storage=storage, *args, **kwargs)

# Usage with custom storage
s3_config = {
    'bucket_name': 'my-files-bucket',
    'aws_access_key': 'your-access-key',
    'aws_secret_key': 'your-secret-key'
}

admin.add_view(CustomFileAdmin(
    s3_config,
    name='S3 Files',
    category='Cloud Storage'
))

from flask_admin.contrib.fileadmin import FileAdmin
from flask import flash, request, redirect, url_for
import os
import zipfile
from PIL import Image

class AdvancedFileAdmin(FileAdmin):
    # Enhanced file type support
    allowed_extensions = ('txt', 'md', 'py', 'js', 'css', 'html', 'json', 'xml', 
                         'jpg', 'jpeg', 'png', 'gif', 'pdf', 'zip', 'tar', 'gz')
    
    editable_extensions = ('txt', 'md', 'py', 'js', 'css', 'html', 'json', 'xml', 'yaml', 'yml')
    
    def on_file_upload(self, directory, path, filename):
        """Hook called after successful file upload."""
        file_path = os.path.join(path, filename)
        
        # Auto-generate thumbnails for images
        if filename.lower().endswith(('jpg', 'jpeg', 'png')):
            self.generate_thumbnail(file_path)
        
        # Auto-extract ZIP files
        if filename.lower().endswith('.zip') and request.form.get('auto_extract'):
            self.extract_zip(file_path, directory)
    
    def generate_thumbnail(self, image_path):
        """Generate thumbnail for uploaded image."""
        try:
            with Image.open(image_path) as img:
                img.thumbnail((200, 200))
                thumb_path = image_path.rsplit('.', 1)[0] + '_thumb.' + image_path.rsplit('.', 1)[1]
                img.save(thumb_path)
                flash(f'Generated thumbnail: {os.path.basename(thumb_path)}', 'success')
        except Exception as ex:
            flash(f'Failed to generate thumbnail: {str(ex)}', 'warning')
    
    def extract_zip(self, zip_path, target_dir):
        """Extract ZIP file contents."""
        try:
            with zipfile.ZipFile(zip_path, 'r') as zip_ref:
                extract_path = os.path.join(target_dir, 'extracted')
                os.makedirs(extract_path, exist_ok=True)
                zip_ref.extractall(extract_path)
                flash(f'Extracted ZIP contents to: extracted/', 'success')
        except Exception as ex:
            flash(f'Failed to extract ZIP: {str(ex)}', 'error')
    
    @expose('/compress/')
    def compress_files(self):
        """Custom action to compress selected files."""
        if request.method == 'POST':
            file_paths = request.form.getlist('file_paths')
            if file_paths:
                zip_name = request.form.get('zip_name', 'archive.zip')
                self.create_zip_archive(file_paths, zip_name)
                return redirect(url_for('.index'))
        
        return self.render('admin/file/compress.html')
    
    def create_zip_archive(self, file_paths, zip_name):
        """Create ZIP archive from selected files."""
        try:
            zip_path = os.path.join(self.get_base_path(), zip_name)
            with zipfile.ZipFile(zip_path, 'w') as zip_file:
                for file_path in file_paths:
                    full_path = os.path.join(self.get_base_path(), file_path)
                    if os.path.exists(full_path):
                        zip_file.write(full_path, file_path)
            
            flash(f'Created archive: {zip_name}', 'success')
        except Exception as ex:
            flash(f'Failed to create archive: {str(ex)}', 'error')

# Register advanced file admin
admin.add_view(AdvancedFileAdmin(
    uploads_path,
    '/uploads/',
    name='Advanced Files',
    category='File Management'
))

from markupsafe import Markup

class ImageGalleryFileAdmin(FileAdmin):
    # Only allow image uploads
    allowed_extensions = ('jpg', 'jpeg', 'png', 'gif', 'bmp', 'webp')
    
    list_template = 'admin/file/image_gallery.html'  # Custom template
    
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # Add custom column formatter for image preview
        self.column_formatters = {
            'name': self._image_formatter
        }
    
    def _image_formatter(self, view, context, model, name):
        """Show image thumbnails in file list."""
        if model and hasattr(model, 'name'):
            filename = model.name
            if self.is_image_file(filename):
                # Generate image tag with thumbnail
                image_url = f"{self.base_url}{filename}"
                return Markup(f'''
                    <div class="image-preview">
                        <img src="{image_url}" style="max-width: 100px; max-height: 100px;" />
                        <br><small>{filename}</small>
                    </div>
                ''')
        return filename
    
    def is_image_file(self, filename):
        """Check if file is an image."""
        return filename and filename.lower().endswith(self.allowed_extensions)

# Register image gallery
gallery_path = op.join(op.dirname(__file__), 'gallery')
admin.add_view(ImageGalleryFileAdmin(
    gallery_path,
    '/gallery/',
    name='Image Gallery',
    category='Media'
))