open_new_round_if_needed now withholds opening the next round until ROUND_COOLDOWN_SECONDS (default 30) have passed since the previous round's closed_at, returning None in that window instead of a Round. Without this, the next round opened within one scheduler tick (~5s) of the previous payout confirming — not enough time for a player to notice the round they were in actually resolved. Callers updated: the scheduler treats None as "nothing to do this tick", and place_bet raises a "try again shortly" BetError instead of crashing on a None round. Not in the original flowchart — a deliberate UX addition on top of it, documented as such in CLAUDE.md. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
40 lines
1.7 KiB
Python
40 lines
1.7 KiB
Python
from datetime import datetime, timedelta, timezone
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.config import settings
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from app.db.models import Round
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_ACTIVE_STATUSES = ("open", "closing", "drawing", "paying_out")
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async def get_active_round(session: AsyncSession) -> Round | None:
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"""The round currently in progress (in any non-closed state), if any. Rounds
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never overlap: a new round only opens once the previous one is fully closed
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(payout confirmed, or no participants to pay out)."""
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return await session.scalar(select(Round).where(Round.status.in_(_ACTIVE_STATUSES)).order_by(Round.id.desc()))
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async def open_new_round_if_needed(session: AsyncSession) -> Round | None:
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"""Returns the active round if one exists (whatever its status). Otherwise
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opens a fresh one, unless the last closed round's cooldown (ROUND_COOLDOWN_SECONDS)
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hasn't elapsed yet — in which case returns None. Callers that need to attach a
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bet must additionally check the returned round's status == "open" — a round in
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closing/drawing/paying_out isn't accepting new bets, but a new round can't open
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until it's done."""
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active = await get_active_round(session)
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if active is not None:
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return active
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last_closed = await session.scalar(select(Round).where(Round.status == "closed").order_by(Round.id.desc()))
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if last_closed is not None and last_closed.closed_at is not None:
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closed_at = last_closed.closed_at.replace(tzinfo=timezone.utc)
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if datetime.now(timezone.utc) < closed_at + timedelta(seconds=settings.round_cooldown_seconds):
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return None
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round_ = Round(status="open")
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session.add(round_)
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await session.flush()
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return round_
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