forked from retoor/devplacepy
retoorandClaude Sonnet 5
34f76aad65
Every purchase/upgrade path (new and pre-existing) is now race-safe against concurrent requests via atomic conditional SQL updates. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
35 lines
1.3 KiB
Python
35 lines
1.3 KiB
Python
# retoor <retoor@molodetz.nl>
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from __future__ import annotations
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from .. import economy
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from .common import GameError, _lvl, conditional_update_farm
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from .farm import ensure_farm, get_farm
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MASTERY_COLUMN = {m.key: f"mastery_{m.key}" for m in economy.MASTERY_UPGRADES}
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def upgrade_mastery(user: dict, key: str) -> dict:
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upgrade = economy.mastery_for(key)
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if not upgrade:
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raise GameError("Unknown Mastery upgrade.")
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farm = ensure_farm(user["uid"])
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column = MASTERY_COLUMN[upgrade.key]
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level = _lvl(farm, column)
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if level >= upgrade.max_level:
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raise GameError("That Mastery upgrade is maxed out.")
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cost = economy.mastery_cost(upgrade, level)
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rows = conditional_update_farm(
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farm["uid"],
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set_clause=f"mastery_points = COALESCE(mastery_points, 0) - :cost, {column} = :new_level",
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where_clause=f"COALESCE({column}, 0) = :current_level AND COALESCE(mastery_points, 0) >= :cost",
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params={"cost": cost, "new_level": level + 1, "current_level": level},
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)
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if rows == 0:
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farm = get_farm(user["uid"])
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if _lvl(farm, column) != level:
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raise GameError("That Mastery upgrade already changed - refresh and try again.")
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raise GameError("Not enough Mastery points for that upgrade.")
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return {"key": upgrade.key, "level": level + 1, "spent": cost}
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