105 lines
3.3 KiB
Python
105 lines
3.3 KiB
Python
"""Fundamental data service.
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Stores fundamental data (P/E, revenue growth, earnings surprise, market cap)
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and marks the fundamental dimension score as stale on new data.
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"""
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from __future__ import annotations
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import json
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import logging
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from datetime import datetime, timezone
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from sqlalchemy import select, update
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.database import insert_for_session
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from app.exceptions import NotFoundError
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from app.models.fundamental import FundamentalData
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from app.models.score import DimensionScore
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from app.models.ticker import Ticker
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logger = logging.getLogger(__name__)
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async def _get_ticker(db: AsyncSession, symbol: str) -> Ticker:
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"""Look up a ticker by symbol."""
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normalised = symbol.strip().upper()
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result = await db.execute(select(Ticker).where(Ticker.symbol == normalised))
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ticker = result.scalar_one_or_none()
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if ticker is None:
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raise NotFoundError(f"Ticker not found: {normalised}")
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return ticker
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async def store_fundamental(
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db: AsyncSession,
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symbol: str,
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pe_ratio: float | None = None,
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revenue_growth: float | None = None,
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earnings_surprise: float | None = None,
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market_cap: float | None = None,
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next_earnings_date=None,
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unavailable_fields: dict[str, str] | None = None,
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) -> FundamentalData:
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"""Store or update fundamental data for a ticker.
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Keeps a single latest snapshot per ticker. On new data, marks the
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fundamental dimension score as stale (if one exists).
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"""
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ticker = await _get_ticker(db, symbol)
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now = datetime.now(timezone.utc)
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unavailable_fields_json = json.dumps(unavailable_fields or {})
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stmt = insert_for_session(db, FundamentalData).values(
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ticker_id=ticker.id,
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pe_ratio=pe_ratio,
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revenue_growth=revenue_growth,
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earnings_surprise=earnings_surprise,
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market_cap=market_cap,
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next_earnings_date=next_earnings_date,
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fetched_at=now,
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unavailable_fields_json=unavailable_fields_json,
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)
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stmt = stmt.on_conflict_do_update(
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index_elements=["ticker_id"],
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set_={
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"pe_ratio": stmt.excluded.pe_ratio,
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"revenue_growth": stmt.excluded.revenue_growth,
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"earnings_surprise": stmt.excluded.earnings_surprise,
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"market_cap": stmt.excluded.market_cap,
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"next_earnings_date": stmt.excluded.next_earnings_date,
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"fetched_at": stmt.excluded.fetched_at,
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"unavailable_fields_json": stmt.excluded.unavailable_fields_json,
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},
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).returning(FundamentalData)
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record = (await db.execute(stmt)).scalar_one()
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# Mark fundamental dimension score as stale if it exists
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# TODO: Use DimensionScore service when built
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await db.execute(
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update(DimensionScore)
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.where(
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DimensionScore.ticker_id == ticker.id,
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DimensionScore.dimension == "fundamental",
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)
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.values(is_stale=True)
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)
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await db.commit()
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return record
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async def get_fundamental(
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db: AsyncSession,
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symbol: str,
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) -> FundamentalData | None:
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"""Get the latest fundamental data for a ticker."""
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ticker = await _get_ticker(db, symbol)
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result = await db.execute(
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select(FundamentalData).where(FundamentalData.ticker_id == ticker.id)
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)
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return result.scalar_one_or_none()
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