84 lines
3.3 KiB
JavaScript
84 lines
3.3 KiB
JavaScript
// server/sim/battle/events.js — Battle methods: client events (DESIGN §8.2 tuples, bounded buffer), the snapshot, field
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// meta, fx and the sim log.
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// Installed on Battle.prototype by server/sim/Battle.js (a method container: never instantiated; `this` is the battle).
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import { EVENT_BUFFER_CAP } from '../constants.js';
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import { elementView } from '../damage.js';
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import { unitInfo, snapshotUnits } from '../snapshot.js';
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export class BattleEvents {
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fx(kind, params = {}) {
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const { x = 0, y = 0, ...extra } = params || {};
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this._ev(['fx', kind, Math.round(x * 100) / 100, Math.round(y * 100) / 100, extra]);
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}
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log(msg) {
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const k = 'log:' + msg;
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if (this._errKeys.has(k)) return;
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this._errKeys.add(k);
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if (this.opts.verbose) this.logger.warn?.(`[sim] ${msg}`);
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}
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_ev(tuple) {
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if (!this.recordEvents) return;
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this._evq.push(tuple);
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if (this._evq.length > EVENT_BUFFER_CAP) this._evq.splice(0, this._evq.length - EVENT_BUFFER_CAP / 2);
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}
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/** Client-facing events since the last drain (DESIGN §8.2 tuples). */
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drainEvents() {
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const ev = this._evq;
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this._evq = [];
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return ev;
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}
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/**
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* Compact full snapshot of this field (DESIGN §8.2 b.snap), plus (only when non-empty):
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* down: [[id, respawnAt, respawnTime, state, row, col]] — operators that left the field waiting to redeploy (isDown): the
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* game time their respawn timer ends, its length (s), constants.js DOWN_STATE and the tile they lie on (and
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* come back on: _layBody — where they fell, or their home);
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* elem: [[id, element, fill, cooldownEnd, cooldown]] — the element gauge each unit shows (damage.js elementView).
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*/
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snapshot() {
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const snap = {
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fieldId: this.fieldId,
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t: Math.round(this.time * 1000) / 1000,
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units: snapshotUnits(this.units, this.time),
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dp: this.players.length ? Math.floor(this.players[0].dp) : 0,
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killed: this.killed,
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total: this.total,
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};
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if (this.players.length > 1) {
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snap.dps = {};
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for (const p of this.players) snap.dps[p.playerId] = Math.floor(p.dp);
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}
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if (this.sharedBoss) snap.boss = { hp: Math.max(0, Math.round(this.sharedBoss.hp)), max: Math.round(this.sharedBoss.maxHp) };
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const r2 = (v) => Math.round(v * 100) / 100;
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let down = null;
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for (const u of this.allyUnits) {
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if (!this.isDown(u)) continue;
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(down || (down = [])).push([u.id, r2(u.respawnAt), r2(Math.max(0, u.respawnAt - u.deathAt)), this._downState(u), ...this.restTile(u)]);
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}
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if (down) snap.down = down;
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let elem = null;
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for (const u of this.units) {
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if (!u.alive || !u.deployed || u.hidden) continue;
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const v = elementView(u, this.time);
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if (v) (elem || (elem = [])).push([u.id, v[0], v[1], v[2], v[3]]);
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}
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if (elem) snap.elem = elem;
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return snap;
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}
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/**
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* Field meta for m.field: { fieldId, kind, rect, stageId, units: UnitInfo[] } — the units on the field, knocked-out
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* operators waiting to redeploy included (a client joining mid-battle shows them down).
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*/
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fieldMeta() {
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return {
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fieldId: this.fieldId, kind: this.kind, rect: { ...this.rect }, stageId: this.stageId,
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units: this.units.filter((u) => (u.alive && u.deployed && !u.hidden) || this.isDown(u)).map(unitInfo),
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};
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}
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}
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