@jsprismarine/prismarine/dist/events/EventEmitterishMixin.es.js

Dedicated Minecraft Bedrock Edition server written in TypeScript

import { Evt, to } from 'evt';

function EventEmitterishMixin(Base, getEvt) {
  const instanceProperties = /* @__PURE__ */ new WeakMap();
  return class extends Base {
    constructor(...args) {
      super(...args);
      Evt.setDefaultMaxHandlers(Number.MAX_SAFE_INTEGER);
      instanceProperties.set(this, {
        evt: getEvt({
          constructorArgs: args,
          instance: this
        }),
        ctx: Evt.newCtx()
      });
    }
    on(id, callback) {
      const { evt, ctx } = instanceProperties.get(this);
      evt.$attach(to(id), ctx, callback);
      return this;
    }
    once(id, callback) {
      const { evt, ctx } = instanceProperties.get(this);
      evt.$attachOnce(to(id), ctx, callback);
      return this;
    }
    removeListener(id, callback) {
      const { ctx } = instanceProperties.get(this);
      ctx.getHandlers().filter(({ handler }) => handler.op === to(id) && handler.callback === callback).forEach(({ handler }) => handler.detach());
      return this;
    }
    removeAllListeners(id) {
      const { ctx } = instanceProperties.get(this);
      if (id === void 0) {
        ctx.done();
      } else {
        ctx.getHandlers().filter(({ handler }) => handler.op === to(id)).forEach(({ handler }) => handler.detach());
      }
      return this;
    }
    /**
     * Returns a promise that resolve after
     * each async callbacks have resolved.
     */
    async emit(id, event) {
      const { evt } = instanceProperties.get(this);
      return evt.postAndWait([id, event]);
    }
  };
}

export { EventEmitterishMixin };
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