39 lines
1.2 KiB
Python
39 lines
1.2 KiB
Python
"""FastAPI dependencies — per-request wiring (SD-0001 §6.2 platform/deps).
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Yields a pooled connection per request, the process-wide mailer, and the verified session
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payload (from the signed cookie). The pool and mailer live on app.state, built once in
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create_app(). The storefronts dependency lands in SLICE-3.
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"""
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from __future__ import annotations
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from collections.abc import Iterator
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from typing import Any
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import psycopg
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from fastapi import Request
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from app.platform import config, session
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from app.platform.mailer import Mailer
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SESSION_COOKIE = "ecomm_session"
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def get_conn(request: Request) -> Iterator[psycopg.Connection]:
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"""A pooled connection for the duration of one request."""
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pool = request.app.state.pool
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with pool.connection() as conn:
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yield conn
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def get_mailer(request: Request) -> Mailer:
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"""The process-wide mailer adapter (built from config at startup, INV-8)."""
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return request.app.state.mailer
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def get_session(request: Request) -> dict[str, Any] | None:
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"""The verified session payload from the cookie, or None if absent/invalid."""
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token = request.cookies.get(SESSION_COOKIE)
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if not token:
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return None
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return session.verify(token, config.session_secret())
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