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"""
File handling utilities for different input types.
"""
import os
import tempfile
import logging
from typing import Optional, Union, Tuple
from pathlib import Path
from ..config.settings import (
SUPPORTED_IMAGE_FORMATS,
SUPPORTED_AUDIO_FORMATS,
SUPPORTED_VIDEO_FORMATS,
)
logger = logging.getLogger(__name__)
def validate_file_format(filename: str, supported_formats: list) -> bool:
"""
Validate if a file has a supported format.
Args:
filename: Name of the file to validate
supported_formats: List of supported file extensions
Returns:
True if file format is supported, False otherwise
"""
if not filename:
return False
file_extension = Path(filename).suffix.lower().lstrip(".")
return file_extension in supported_formats
def validate_image_file(filename: str) -> bool:
"""Validate if a file is a supported image format."""
return validate_file_format(filename, SUPPORTED_IMAGE_FORMATS)
def validate_audio_file(filename: str) -> bool:
"""Validate if a file is a supported audio format."""
return validate_file_format(filename, SUPPORTED_AUDIO_FORMATS)
def validate_video_file(filename: str) -> bool:
"""Validate if a file is a supported video format."""
return validate_file_format(filename, SUPPORTED_VIDEO_FORMATS)
def get_file_info(file_object) -> dict:
"""
Extract file information from a file object.
Args:
file_object: File object (e.g., StreamlitUploadedFile)
Returns:
Dictionary containing file information
"""
try:
if hasattr(file_object, "getvalue"):
file_size = len(file_object.getvalue())
file_name = getattr(file_object, "name", "Unknown")
else:
file_size = len(file_object)
file_name = "Unknown"
file_extension = (
Path(file_name).suffix.lower().lstrip(".")
if file_name != "Unknown"
else "Unknown"
)
return {
"name": file_name,
"size_bytes": file_size,
"size_kb": file_size / 1024,
"size_mb": file_size / (1024 * 1024),
"extension": file_extension,
"is_valid_image": (
validate_image_file(file_name) if file_extension != "Unknown" else False
),
"is_valid_audio": (
validate_audio_file(file_name) if file_extension != "Unknown" else False
),
"is_valid_video": (
validate_video_file(file_name) if file_extension != "Unknown" else False
),
}
except Exception as e:
logger.error(f"Error getting file info: {str(e)}")
return {
"name": "Unknown",
"size_bytes": 0,
"size_kb": 0,
"size_mb": 0,
"extension": "Unknown",
"is_valid_image": False,
"is_valid_audio": False,
"is_valid_video": False,
}
def create_temp_file(
suffix: str = "", prefix: str = "temp_"
) -> Tuple[str, tempfile.NamedTemporaryFile]:
"""
Create a temporary file with proper cleanup handling.
Args:
suffix: File extension suffix
prefix: File name prefix
Returns:
Tuple of (file_path, temp_file_object)
"""
temp_file = tempfile.NamedTemporaryFile(suffix=suffix, prefix=prefix, delete=False)
return temp_file.name, temp_file
def cleanup_temp_file(file_path: str) -> bool:
"""
Safely cleanup a temporary file.
Args:
file_path: Path to the temporary file
Returns:
True if cleanup was successful, False otherwise
"""
try:
if os.path.exists(file_path):
os.unlink(file_path)
return True
return True
except (OSError, PermissionError) as e:
logger.warning(f"Could not delete temporary file {file_path}: {e}")
return False
def format_file_size(size_bytes: int) -> str:
"""
Format file size in human-readable format.
Args:
size_bytes: File size in bytes
Returns:
Formatted file size string
"""
if size_bytes < 1024:
return f"{size_bytes} B"
elif size_bytes < 1024 * 1024:
return f"{size_bytes / 1024:.1f} KB"
elif size_bytes < 1024 * 1024 * 1024:
return f"{size_bytes / (1024 * 1024):.1f} MB"
else:
return f"{size_bytes / (1024 * 1024 * 1024):.1f} GB"
def safe_file_operation(operation_func, *args, **kwargs):
"""
Safely execute a file operation with proper error handling.
Args:
operation_func: Function to execute
*args: Positional arguments for the function
**kwargs: Keyword arguments for the function
Returns:
Result of the operation or None if it fails
"""
try:
return operation_func(*args, **kwargs)
except FileNotFoundError as e:
logger.error(f"File not found: {e}")
return None
except PermissionError as e:
logger.error(f"Permission denied: {e}")
return None
except OSError as e:
logger.error(f"OS error: {e}")
return None
except Exception as e:
logger.error(f"Unexpected error in file operation: {e}")
return None
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