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i=n("vzCy"),o=n("dcD+"),s=n("zXBm"),a=n("pBXs"),u=n("cSWu").Writable,c=n("LC74"),l=n("Ms2V"),h=n("BKrL"),f=n("q+vg"),p=e.setImmediate||function(t){r.nextTick(t)},d={keepalive:60,reschedulePings:!0,protocolId:"MQTT",protocolVersion:4,reconnectPeriod:1e3,connectTimeout:3e4,clean:!0,resubscribe:!0};function b(t,e,n){t.emit("packetsend",e),!a.writeToStream(e,t.stream)&&n?t.stream.once("drain",n):n&&n()}function g(t,e,n){t.outgoingStore.put(e,function(r){if(r)return n&&n(r);b(t,e,n)})}function y(){}function _(t,e){var n,r=this;if(!(this instanceof _))return new _(t,e);for(n in this.options=e||{},d)void 0===this.options[n]?this.options[n]=d[n]:this.options[n]=e[n];this.options.clientId="string"==typeof this.options.clientId?this.options.clientId:"mqttjs_"+Math.random().toString(16).substr(2,8),this.streamBuilder=t,this.outgoingStore=this.options.outgoingStore||new o,this.incomingStore=this.options.incomingStore||new o,this.queueQoSZero=void 0===this.options.queueQoSZero||this.options.queueQoSZero,this._resubscribeTopics={},this.messageIdToTopic={},this.pingTimer=null,this.connected=!1,this.disconnecting=!1,this.queue=[],this.connackTimer=null,this.reconnectTimer=null,this.nextId=Math.max(1,Math.floor(65535*Math.random())),this.outgoing={},this.on("connect",function(){if(!this.disconnected){this.connected=!0;var t=this.outgoingStore.createStream();this.once("close",e),t.on("end",function(){r.removeListener("close",e)}),t.on("error",function(t){r.removeListener("close",e),r.emit("error",t)}),function e(){if(t){var n,i=t.read(1);i?r.disconnecting||r.reconnectTimer?t.destroy&&t.destroy():(n=r.outgoing[i.messageId],r.outgoing[i.messageId]=function(t,r){n&&n(t,r),e()},r._sendPacket(i)):t.once("readable",e)}}()}function e(){t.destroy(),t=null}}),this.on("close",function(){this.connected=!1,clearTimeout(this.connackTimer)}),this.on("connect",this._setupPingTimer),this.on("connect",function(){var t=this.queue;!function e(){var n,i=t.shift();i&&(n=i.packet,r._sendPacket(n,function(t){i.cb&&i.cb(t),e()}))}()});var s=!0;this.on("connect",function(){!s&&this.options.clean&&Object.keys(this._resubscribeTopics).length>0&&(this.options.resubscribe?(this._resubscribeTopics.resubscribe=!0,this.subscribe(this._resubscribeTopics)):this._resubscribeTopics={}),s=!1}),this.on("close",function(){null!==r.pingTimer&&(r.pingTimer.clear(),r.pingTimer=null)}),this.on("close",this._setupReconnect),i.EventEmitter.call(this),this._setupStream()}c(_,i.EventEmitter),_.prototype._setupStream=function(){var t,e=this,n=new u,i=a.parser(this.options),o=null,c=[];function l(){r.nextTick(h)}function h(){var t=c.shift(),n=o;t?e._handlePacket(t,l):(o=null,n())}this._clearReconnect(),this.stream=this.streamBuilder(this),i.on("packet",function(t){c.push(t)}),n._write=function(t,e,n){o=n,i.parse(t),h()},this.stream.pipe(n),this.stream.on("error",y),s(this.stream,this.emit.bind(this,"close")),(t=Object.create(this.options)).cmd="connect",b(this,t),i.on("error",this.emit.bind(this,"error")),this.stream.setMaxListeners(1e3),clearTimeout(this.connackTimer),this.connackTimer=setTimeout(function(){e._cleanUp(!0)},this.options.connectTimeout)},_.prototype._handlePacket=function(t,e){switch(this.emit("packetreceive",t),t.cmd){case"publish":this._handlePublish(t,e);break;case"puback":case"pubrec":case"pubcomp":case"suback":case"unsuback":this._handleAck(t),e();break;case"pubrel":this._handlePubrel(t,e);break;case"connack":this._handleConnack(t),e();break;case"pingresp":this._handlePingresp(t),e()}},_.prototype._checkDisconnecting=function(t){return this.disconnecting&&(t?t(new Error("client disconnecting")):this.emit("error",new Error("client disconnecting"))),this.disconnecting},_.prototype.publish=function(t,e,n,r){var i;"function"==typeof n&&(r=n,n=null);if(n=f({qos:0,retain:!1,dup:!1},n),this._checkDisconnecting(r))return this;switch(i={cmd:"publish",topic:t,payload:e,qos:n.qos,retain:n.retain,messageId:this._nextId(),dup:n.dup},n.qos){case 1:case 2:this.outgoing[i.messageId]=r||y,this._sendPacket(i);break;default:this._sendPacket(i,r)}return this},_.prototype.subscribe=function(){var t,e,n=Array.prototype.slice.call(arguments),r=[],i=n.shift(),o=i.resubscribe,s=n.pop()||y,a=n.pop(),u=this;if(delete i.resubscribe,"string"==typeof i&&(i=[i]),"function"!=typeof s&&(a=s,s=y),null!==(e=h.validateTopics(i)))return p(s,new Error("Invalid topic "+e)),this;if(this._checkDisconnecting(s))return this;if(a=f({qos:0},a),Array.isArray(i)?i.forEach(function(t){(u._resubscribeTopics[t]<a.qos||!u._resubscribeTopics.hasOwnProperty(t)||o)&&r.push({topic:t,qos:a.qos})}):Object.keys(i).forEach(function(t){(u._resubscribeTopics[t]<i[t]||!u._resubscribeTopics.hasOwnProperty(t)||o)&&r.push({topic:t,qos:i[t]})}),t={cmd:"subscribe",subscriptions:r,qos:1,retain:!1,dup:!1,messageId:this._nextId()},r.length){if(this.options.resubscribe){var c=[];r.forEach(function(t){u.options.reconnectPeriod>0&&(u._resubscribeTopics[t.topic]=t.qos,c.push(t.topic))}),u.messageIdToTopic[t.messageId]=c}return this.outgoing[t.messageId]=function(t,e){if(!t)for(var n=e.granted,i=0;i<n.length;i+=1)r[i].qos=n[i];s(t,r)},this._sendPacket(t),this}s(null,[])},_.prototype.unsubscribe=function(t,e){var n={cmd:"unsubscribe",qos:1,messageId:this._nextId()},r=this;return e=e||y,this._checkDisconnecting(e)?this:("string"==typeof t?n.unsubscriptions=[t]:"object"==typeof t&&t.length&&(n.unsubscriptions=t),this.options.resubscribe&&n.unsubscriptions.forEach(function(t){delete r._resubscribeTopics[t]}),this.outgoing[n.messageId]=e,this._sendPacket(n),this)},_.prototype.end=function(t,e){var n=this;function r(){n.disconnected=!0,n.incomingStore.close(function(){n.outgoingStore.close(function(){e&&e.apply(null,arguments),n.emit("end")})}),n._deferredReconnect&&n._deferredReconnect()}function i(){n._cleanUp(t,p.bind(null,r))}return"function"==typeof t&&(e=t,t=!1),this.disconnecting?this:(this._clearReconnect(),this.disconnecting=!0,!t&&Object.keys(this.outgoing).length>0?this.once("outgoingEmpty",setTimeout.bind(null,i,10)):i(),this)},_.prototype.removeOutgoingMessage=function(t){var e=this.outgoing[t];return delete this.outgoing[t],this.outgoingStore.del({messageId:t},function(){e(new Error("Message removed"))}),this},_.prototype.reconnect=function(t){var e=this,n=function(){t?(e.options.incomingStore=t.incomingStore,e.options.outgoingStore=t.outgoingStore):(e.options.incomingStore=null,e.options.outgoingStore=null),e.incomingStore=e.options.incomingStore||new o,e.outgoingStore=e.options.outgoingStore||new o,e.disconnecting=!1,e.disconnected=!1,e._deferredReconnect=null,e._reconnect()};return this.disconnecting&&!this.disconnected?this._deferredReconnect=n:n(),this},_.prototype._reconnect=function(){this.emit("reconnect"),this._setupStream()},_.prototype._setupReconnect=function(){var t=this;!t.disconnecting&&!t.reconnectTimer&&t.options.reconnectPeriod>0&&(this.reconnecting||(this.emit("offline"),this.reconnecting=!0),t.reconnectTimer=setInterval(function(){t._reconnect()},t.options.reconnectPeriod))},_.prototype._clearReconnect=function(){this.reconnectTimer&&(clearInterval(this.reconnectTimer),this.reconnectTimer=null)},_.prototype._cleanUp=function(t,e){var n;e&&this.stream.on("close",e),t?(0===this.options.reconnectPeriod&&this.options.clean&&(n=this.outgoing)&&Object.keys(n).forEach(function(t){"function"==typeof n[t]&&(n[t](new Error("Connection closed")),delete n[t])}),this.stream.destroy()):this._sendPacket({cmd:"disconnect"},p.bind(null,this.stream.end.bind(this.stream))),this.disconnecting||(this._clearReconnect(),this._setupReconnect()),null!==this.pingTimer&&(this.pingTimer.clear(),this.pingTimer=null),e&&!this.connected&&(this.stream.removeListener("close",e),e())},_.prototype._sendPacket=function(t,e){if(this.connected){switch(this._shiftPingInterval(),t.cmd){case"publish":break;case"pubrel":return void g(this,t,e);default:return void b(this,t,e)}switch(t.qos){case 2:case 1:g(this,t,e);break;case 0:default:b(this,t,e)}}else 0===(t.qos||0)&&this.queueQoSZero||"publish"!==t.cmd?this.queue.push({packet:t,cb:e}):t.qos>0?(e=this.outgoing[t.messageId],this.outgoingStore.put(t,function(t){if(t)return e&&e(t)})):e&&e(new Error("No connection to broker"))},_.prototype._setupPingTimer=function(){var t=this;!this.pingTimer&&this.options.keepalive&&(this.pingResp=!0,this.pingTimer=l(function(){t._checkPing()},1e3*this.options.keepalive))},_.prototype._shiftPingInterval=function(){this.pingTimer&&this.options.keepalive&&this.options.reschedulePings&&this.pingTimer.reschedule(1e3*this.options.keepalive)},_.prototype._checkPing=function(){this.pingResp?(this.pingResp=!1,this._sendPacket({cmd:"pingreq"})):this._cleanUp(!0)},_.prototype._handlePingresp=function(){this.pingResp=!0},_.prototype._handleConnack=function(t){var e=t.returnCode;if(clearTimeout(this.connackTimer),0===e)this.reconnecting=!1,this.emit("connect",t);else if(e>0){var n=new Error("Connection refused: "+["","Unacceptable protocol version","Identifier rejected","Server unavailable","Bad username or password","Not authorized"][e]);n.code=e,this.emit("error",n)}},_.prototype._handlePublish=function(t,e){e=void 0!==e?e:y;var n=t.topic.toString(),r=t.payload,i=t.qos,o=t.messageId,s=this;switch(i){case 2:this.incomingStore.put(t,function(t){if(t)return e(t);s._sendPacket({cmd:"pubrec",messageId:o},e)});break;case 1:this.emit("message",n,r,t),this.handleMessage(t,function(t){if(t)return e(t);s._sendPacket({cmd:"puback",messageId:o},e)});break;case 0:this.emit("message",n,r,t),this.handleMessage(t,e)}},_.prototype.handleMessage=function(t,e){e()},_.prototype._handleAck=function(t){var e=t.messageId,n=t.cmd,r=null,i=this.outgoing[e],o=this;if(i){switch(n){case"pubcomp":case"puback":delete this.outgoing[e],this.outgoingStore.del(t,i);break;case"pubrec":r={cmd:"pubrel",qos:2,messageId:e},this._sendPacket(r);break;case"suback":if(delete this.outgoing[e],1===t.granted.length&&0!=(128&t.granted[0])){var s=this.messageIdToTopic[e];s&&s.forEach(function(t){delete o._resubscribeTopics[t]})}i(null,t);break;case"unsuback":delete this.outgoing[e],i(null);break;default:o.emit("error",new Error("unrecognized packet type"))}this.disconnecting&&0===Object.keys(this.outgoing).length&&this.emit("outgoingEmpty")}},_.prototype._handlePubrel=function(t,e){e=void 0!==e?e:y;var n=this,r={cmd:"pubcomp",messageId:t.messageId};n.incomingStore.get(t,function(i,o){i||"pubrel"===o.cmd?n._sendPacket(r,e):(n.emit("message",o.topic,o.payload,o),n.incomingStore.put(t,function(t){if(t)return e(t);n.handleMessage(o,function(t){if(t)return e(t);n._sendPacket(r,e)})}))})},_.prototype._nextId=function(){var t=this.nextId++;return 65536===this.nextId&&(this.nextId=1),t},_.prototype.getLastMessageId=function(){return 1===this.nextId?65535:this.nextId-1},t.exports=_}).call(e,n("DuR2"),n("W2nU"))},JUqv:function(t,e,n){"use strict";t.exports=n("KHvW")()?Number.isNaN:n("u1vs")},KHvW:function(t,e,n){"use strict";t.exports=function(){var t=Number.isNaN;return"function"==typeof t&&(!t({})&&t(NaN)&&!t(34))}},Kqp3:function(t,e,n){"use strict";t.exports=function(t){return"function"==typeof t}},L0Xt:function(t,e,n){"use strict";var r=n("97+M"),i=n("X3l8").Buffer,o=i.allocUnsafe(0),s=i.from([0]),a=n("jyB8"),u=n("ypnx").nextTick,c=a.cache,l=a.generateNumber,h=a.generateCache,f=m,p=!0;function d(t,e){switch(e.cork&&(e.cork(),u(b,e)),p&&(p=!1,h()),t.cmd){case"connect":return function(t,e){var n=t||{},o=n.protocolId||"MQTT",s=n.protocolVersion||4,a=n.will,u=n.clean,c=n.keepalive||0,l=n.clientId||"",h=n.username,p=n.password;void 0===u&&(u=!0);var d=0;if(!o||"string"!=typeof o&&!i.isBuffer(o))return e.emit("error",new Error("Invalid protocolId")),!1;d+=o.length+2;if(3!==s&&4!==s)return e.emit("error",new Error("Invalid protocol version")),!1;d+=1;if("string"!=typeof l&&!i.isBuffer(l)||!l&&4!==s||!l&&!u){if(s<4)return e.emit("error",new Error("clientId must be supplied before 3.1.1")),!1;if(1*u==0)return e.emit("error",new Error("clientId must be given if cleanSession set to 0")),!1}else d+=l.length+2;if("number"!=typeof c||c<0||c>65535||c%1!=0)return e.emit("error",new Error("Invalid 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