Initial commit

server/internal/store/stamina.go

@@ -0,0 +1,41 @@
+package store
+
+import "log"
+
+const StaminaRecoveryDivisor int64 = 180
+
+func SettleStamina(user *UserState, maxStaminaMillis int32, nowMillis int64) {
+	stored := int64(user.Status.StaminaMilliValue)
+	maxMilli := int64(maxStaminaMillis)
+	if stored >= maxMilli {
+		return
+	}
+	elapsed := nowMillis - user.Status.StaminaUpdateDatetime
+	if elapsed <= 0 {
+		return
+	}
+	regen := elapsed / StaminaRecoveryDivisor
+	settled := min(stored+regen, maxMilli)
+	user.Status.StaminaMilliValue = int32(settled)
+	user.Status.StaminaUpdateDatetime = nowMillis
+}
+
+func ConsumeStamina(user *UserState, costUnits int32, maxStaminaMillis int32, nowMillis int64) {
+	SettleStamina(user, maxStaminaMillis, nowMillis)
+	user.Status.StaminaMilliValue = max(user.Status.StaminaMilliValue-costUnits*1000, 0)
+	user.Status.StaminaUpdateDatetime = nowMillis
+	log.Printf("[ConsumeStamina] cost=%d -> remaining=%d", costUnits, user.Status.StaminaMilliValue)
+}
+
+func RecoverStamina(user *UserState, millis int32, maxStaminaMillis int32, nowMillis int64) {
+	SettleStamina(user, maxStaminaMillis, nowMillis)
+	user.Status.StaminaMilliValue += millis
+	user.Status.StaminaUpdateDatetime = nowMillis
+	log.Printf("[RecoverStamina] +%d -> total=%d", millis, user.Status.StaminaMilliValue)
+}
+
+func ReplenishStamina(user *UserState, maxStaminaMillis int32, nowMillis int64) {
+	user.Status.StaminaMilliValue = maxStaminaMillis
+	user.Status.StaminaUpdateDatetime = nowMillis
+	log.Printf("[ReplenishStamina] set to %d", maxStaminaMillis)
+}