""" AlphaPulse Bot — Utility Functions """ import re import hashlib import logging from datetime import datetime from zoneinfo import ZoneInfo from config import BASE_HASHTAGS, TOPIC_TAGS, KNOWN_TICKERS, NEWS_TYPE_SIGNALS logger = logging.getLogger(__name__) VANCOUVER = ZoneInfo('America/Vancouver') def now_van() -> datetime: """Current Vancouver time (PST/PDT auto).""" return datetime.now(VANCOUVER) def stable_id(source: str, url: str) -> str: """MD5-based ID — stable across Python restarts.""" return hashlib.md5(f"{source}:{url}".encode()).hexdigest() def build_hashtags(title: str = '', source: str = '') -> str: """Build dynamic hashtags from news title + base set. Extracts $TICKERs and appends topic tags based on keywords. """ text_lower = (title + ' ' + source).lower() tags = set(BASE_HASHTAGS.split()) # Extract known tickers mentioned in title words = re.findall(r'\b([A-Za-z]{2,6})\b', title) for w in words: if w.lower() in KNOWN_TICKERS: tags.add(f'${w.upper()}') # Add topic-based tags for keyword, tag in TOPIC_TAGS.items(): if keyword in text_lower: tags.add(tag) return ' '.join(sorted(tags, key=lambda t: (not t.startswith('#crypto'), t))) def detect_news_format(title: str) -> str | None: """Auto-detect best AI format from news title keywords. Returns format name or None (-> use weighted random). """ title_lower = title.lower() for fmt, keywords in NEWS_TYPE_SIGNALS.items(): if any(kw in title_lower for kw in keywords): return fmt return None