MetaTrader5 MCP Server

"""Server utilities and helper functions.""" from typing import Optional, Set def coerce_scalar(s: str) -> str: """Try to coerce a scalar string to int or float; otherwise return original string. Args: s: String to coerce Returns: Coerced value (int, float, or original string) """ try: if s is None: return s st = str(s).strip() if st == "": return st if st.isdigit() or (st.startswith('-') and st[1:].isdigit()): return int(st) v = float(st) return v except Exception: return s def normalize_ohlcv_arg(ohlcv: Optional[str]) -> Optional[Set[str]]: """Normalize user-provided OHLCV selection into a set of letters. Accepts forms like: 'close', 'price', 'ohlc', 'ohlcv', 'all', 'cl', 'OHLCV', or names 'open,high,low,close,volume'. Returns None when not specified. Args: ohlcv: OHLCV specification string Returns: Set of OHLCV letters or None if not specified """ if ohlcv is None: return None text = str(ohlcv).strip() if text == "": return None t = text.lower() if t in ("all", "ohlcv"): return {"O", "H", "L", "C", "V"} if t in ("ohlc",): return {"O", "H", "L", "C"} if t in ("price", "close"): return {"C"} # Compact letters like 'cl', 'oh', etc. if all(ch in "ohlcv" for ch in t): return {ch.upper() for ch in t} # Comma separated names parts = [p.strip().lower() for p in t.replace(";", ",").split(",") if p.strip() != ""] if not parts: return None mapping = { "o": "O", "open": "O", "h": "H", "high": "H", "l": "L", "low": "L", "c": "C", "close": "C", "price": "C", "v": "V", "vol": "V", "volume": "V", "tick_volume": "V", } out: Set[str] = set() for p in parts: key = mapping.get(p) if key: out.add(key) return out or None