mini-mqtt-bus/dist/mini-mqtt-bus.es.js

MQTT client wrapper with event bus for WeChat Mini Programs

class c {
  constructor() {
    this.events = {};
  }
  /**
   * 监听事件
   * @param event 事件名称
   * @param callback 回调函数
   */
  on(e, o) {
    this.events[e] || (this.events[e] = []), this.events[e].push(o);
  }
  /**
   * 移除事件监听
   * @param event 事件名称
   * @param callback 可选的回调函数，不传则移除所有该事件监听
   */
  off(e, o) {
    this.events[e] && (o ? this.events[e] = this.events[e].filter((i) => i !== o) : delete this.events[e]);
  }
  /**
   * 派发事件
   * @param event 事件名称
   * @param args 参数
   */
  emit(e, ...o) {
    this.events[e] && this.events[e].forEach((i) => i(...o));
  }
}
const s = new c(), r = require("../mqtt/mqtt.min.js");
let n = null;
function l(t) {
  n && n.connected || (n = r.connect(t), n.on("connect", () => {
    console.log("[MQTT] 已连接"), s.emit("mqtt:connected");
  }), n.on("message", (e, o) => {
    const i = o.toString();
    console.log(`[MQTT] 收到消息: ${e} => ${i}`), s.emit(`mqtt:message:${e}`, i), s.emit("mqtt:message", { topic: e, payload: i });
  }), n.on("reconnect", () => {
    console.log("[MQTT] 正在重连..."), s.emit("mqtt:reconnecting");
  }), n.on("close", () => {
    console.warn("[MQTT] 连接关闭"), s.emit("mqtt:closed");
  }), n.on("error", (e) => {
    console.error("[MQTT] 错误:", e), s.emit("mqtt:error", e);
  }));
}
function u(t) {
  if (!n || !n.connected) {
    console.warn("[MQTT] 客户端未连接，无法订阅");
    return;
  }
  n.subscribe(t, { qos: 0 }, (e) => {
    e ? console.error(`[MQTT] 订阅失败: ${t}`, e) : (console.log(`[MQTT] 已订阅: ${t}`), s.emit(`mqtt:subscribed:${t}`, t));
  });
}
function m(t) {
  !n || !n.connected || n.unsubscribe(t, (e) => {
    e ? console.error(`[MQTT] 取消订阅失败: ${t}`, e) : (console.log(`[MQTT] 已取消订阅: ${t}`), s.emit("mqtt:unsubscribed", t));
  });
}
function f(t, e) {
  !n || !n.connected || n.publish(t, e);
}
function T() {
  n && (n.end(), n = null, s.emit("mqtt:disconnected"));
}
const d = {
  init: l,
  subscribe: u,
  unsubscribe: m,
  publish: f,
  disconnect: T
};
export {
  s as eventBus,
  d as mqttClient
};