52 lines
1.6 KiB
JavaScript
52 lines
1.6 KiB
JavaScript
"use strict";
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const TARINAI_PUBLIC_EVENT_TYPES = new Set(["audio:play", "selection:changed", "tool:selected", "world:phase", "log:entry", "tool:placed"]);
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class TarinaiEventBus {
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constructor() {
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this.handlers = new Map();
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}
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on(type, handler) {
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if (!type || typeof handler !== "function") return;
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let list = this.handlers.get(type);
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if (!list) {
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list = new Set();
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this.handlers.set(type, list);
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}
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list.add(handler);
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}
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hasDirectListeners(type) {
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if (!type) return false;
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return Boolean(this.handlers.get(type)?.size || 0);
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}
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hasWildcardListeners(type) {
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if (!type || !TARINAI_PUBLIC_EVENT_TYPES.has(String(type))) return false;
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return Boolean(this.handlers.get("*")?.size || 0);
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}
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hasListeners(type) {
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if (!type) return false;
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return Boolean(this.hasDirectListeners(type) || this.hasWildcardListeners(type));
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}
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emit(type, detail = {}) {
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if (!type) return null;
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const direct = this.handlers.get(type);
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const wildcard = TARINAI_PUBLIC_EVENT_TYPES.has(String(type)) ? this.handlers.get("*") : null;
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if (!(direct?.size || 0) && !(wildcard?.size || 0)) return null;
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const event = { type, detail: detail || {}, at: performance?.now?.() ?? Date.now() };
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if (direct) for (const handler of [...direct]) this.safeCall(handler, event);
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if (wildcard) for (const handler of [...wildcard]) this.safeCall(handler, event);
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return event;
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}
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safeCall(handler, event) {
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try { handler(event); }
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catch (err) { console.error("event handler failed", event.type, err); }
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}
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}
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window.TarinaiEvents = window.TarinaiEvents || new TarinaiEventBus();
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