Code Farm economy rebalance: market saturation, infrastructure/defense/cosmetics, mastery track, secondary leaderboards, admin eras, underdog bonus and weekly contracts

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>

devplacepy/services/game/store/infrastructure.py

@@ -0,0 +1,51 @@
+# retoor <retoor@molodetz.nl>
+
+from __future__ import annotations
+
+import random
+
+from .. import economy
+from .common import GameError, _lvl, conditional_update_farm
+from .farm import ensure_farm, get_farm
+
+
+INFRA_COLUMN = {i.key: f"infra_{i.key}" for i in economy.INFRASTRUCTURE}
+
+
+def buy_infrastructure(user: dict, key: str) -> dict:
+    infra = economy.infra_for(key)
+    if not infra:
+        raise GameError("Unknown infrastructure.")
+    farm = ensure_farm(user["uid"])
+    column = INFRA_COLUMN[infra.key]
+    rows = conditional_update_farm(
+        farm["uid"],
+        set_clause=f"coins = coins - :cost, {column} = 1",
+        where_clause=(
+            f"COALESCE({column}, 0) = 0 AND coins >= :cost "
+            f"AND COALESCE(prestige, 0) >= :min_prestige"
+        ),
+        params={"cost": infra.cost, "min_prestige": infra.min_prestige},
+    )
+    if rows == 0:
+        farm = get_farm(user["uid"])
+        if _lvl(farm, column):
+            raise GameError("You already own that infrastructure.")
+        if _lvl(farm, "prestige") < infra.min_prestige:
+            raise GameError(f"{infra.name} requires prestige {infra.min_prestige}.")
+        raise GameError("Not enough coins for that infrastructure.")
+    return {"key": infra.key, "spent": infra.cost}
+
+
+def owns_infrastructure(farm: dict, key: str) -> bool:
+    column = INFRA_COLUMN.get(key)
+    return bool(column and _lvl(farm, column))
+
+
+def roll_canary(coins_gain: int, plant_cost: int) -> int:
+    roll = random.random()
+    if roll < economy.CANARY_DOUBLE_CHANCE:
+        return coins_gain * 2
+    if roll < economy.CANARY_DOUBLE_CHANCE + economy.CANARY_FAIL_CHANCE:
+        return min(coins_gain, plant_cost)
+    return coins_gain