| 138 | } |
| 139 | } |
| 140 | monitor(service, callback) { |
| 141 | service += ".local"; |
| 142 | let monitor = this.monitors.find(item => item.service === service); |
| 143 | if (monitor) { |
| 144 | if (monitor.callbacks.find(item => item === callback)) |
| 145 | throw new Error("redundant"); |
| 146 | monitor.callbacks.push(callback); |
| 147 | if (!monitor.length) |
| 148 | return; |
| 149 | |
| 150 | Timer.set(() => { |
| 151 | for (let i = 0; i < monitor.length; i++) |
| 152 | callback.call(this, monitor.service.slice(0, -6), monitor[i]); |
| 153 | }, 0); |
| 154 | } |
| 155 | else { |
| 156 | monitor = []; |
| 157 | monitor.service = service; |
| 158 | monitor.state = 0; |
| 159 | monitor.callbacks = [callback]; |
| 160 | monitor.mdns = this; |
| 161 | monitor.timer = Timer.set(this.monitorTask.bind(monitor), 1); |
| 162 | this.monitors.push(monitor); |
| 163 | } |
| 164 | } |
| 165 | monitorTask() { |
| 166 | const mdns = this.mdns; |
| 167 | switch (this.state) { |