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"""
Helper utility functions
"""
import hashlib
import uuid
from datetime import datetime
from typing import Optional
def generate_session_id() -> str:
"""
🔑 GENERATE UNIQUE SESSION ID
"""
timestamp = datetime.now().isoformat()
random_uuid = str(uuid.uuid4())
raw_id = f"{timestamp}-{random_uuid}"
return hashlib.sha256(raw_id.encode()).hexdigest()
def format_timestamp(dt: Optional[datetime] = None) -> str:
"""
📅 FORMAT TIMESTAMP
"""
if dt is None:
dt = datetime.now()
return dt.strftime('%Y-%m-%d %H:%M:%S')
def truncate_text(text: str, max_length: int = 100, suffix: str = "...") -> str:
"""
✂️ TRUNCATE TEXT TO MAX LENGTH
"""
if len(text) <= max_length:
return text
return text[:max_length - len(suffix)] + suffix
def sanitize_filename(filename: str) -> str:
"""
🧹 SANITIZE FILENAME
"""
import re
filename = re.sub(r'[<>:"/\\|?*]', '_', filename)
return filename[:255]
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