fixed # 重构梦三项目结构

mengsan/battle/death-blow.js

@@ -0,0 +1,38 @@
+import {
+    attackHitCount,
+    outgoingAttackDamage,
+} from "./intent-damage.js";
+
+const pendingDeathBlows = new WeakSet();
+
+export function isDeathBlowIntent(intent) {
+    return intent?.intentType === "death_blow";
+}
+
+export function hasPendingDeathBlow(source) {
+    return pendingDeathBlows.has(source);
+}
+
+export async function beginDeathBlow(source, target, intent) {
+    if (!isDeathBlowIntent(intent)) {
+        throw new TypeError("濒死一击需要 death_blow 意图类型");
+    }
+    if (attackHitCount(intent) !== 1) {
+        throw new RangeError("濒死一击只能造成一次伤害");
+    }
+    const damage = outgoingAttackDamage(intent, source);
+    if (!source?.isAlive() || !target?.isAlive()) return false;
+
+    const hit = target.damage(damage, source);
+    hit.mengsanAttack_shuying = true;
+    await hit;
+    if (source.isAlive()) pendingDeathBlows.add(source);
+    return true;
+}
+
+export async function finishDeathBlow(source) {
+    if (!hasPendingDeathBlow(source)) return false;
+    pendingDeathBlows.delete(source);
+    if (source.isAlive()) await source.die();
+    return true;
+}