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0,n.cbStorePut);break;default:this._storeProcessing?this._storePacket(i,r,n.cbStorePut):this._sendPacket(i,r,n.cbStorePut);break}return this},w.prototype.subscribe=function(){for(var t,e=new Array(arguments.length),n=0;n<arguments.length;n++)e[n]=arguments[n];var r,i=[],o=e.shift(),s=o.resubscribe,a=e.pop()||y,c=e.pop(),u=this,h=this.options.protocolVersion;if(delete o.resubscribe,"string"===typeof o&&(o=[o]),"function"!==typeof a&&(c=a,a=y),r=l.validateTopics(o),null!==r)return p(a,new Error("Invalid topic "+r)),this;if(this._checkDisconnecting(a))return this;var d={qos:0};if(5===h&&(d.nl=!1,d.rap=!1,d.rh=0),c=f(d,c),Array.isArray(o)?o.forEach((function(t){if(!u._resubscribeTopics.hasOwnProperty(t)||u._resubscribeTopics[t].qos<c.qos||s){var e={topic:t,qos:c.qos};5===h&&(e.nl=c.nl,e.rap=c.rap,e.rh=c.rh,e.properties=c.properties),i.push(e)}})):Object.keys(o).forEach((function(t){if(!u._resubscribeTopics.hasOwnProperty(t)||u._resubscribeTopics[t].qos<o[t].qos||s){var e={topic:t,qos:o[t].qos};5===h&&(e.nl=o[t].nl,e.rap=o[t].rap,e.rh=o[t].rh,e.properties=c.properties),i.push(e)}})),t={cmd:"subscribe",subscriptions:i,qos:1,retain:!1,dup:!1,messageId:this._nextId()},c.properties&&(t.properties=c.properties),i.length){if(this.options.resubscribe){var m=[];i.forEach((function(t){if(u.options.reconnectPeriod>0){var e={qos:t.qos};5===h&&(e.nl=t.nl||!1,e.rap=t.rap||!1,e.rh=t.rh||0,e.properties=t.properties),u._resubscribeTopics[t.topic]=e,m.push(t.topic)}})),u.messageIdToTopic[t.messageId]=m}return this.outgoing[t.messageId]={volatile:!0,cb:function(t,e){if(!t)for(var n=e.granted,r=0;r<n.length;r+=1)i[r].qos=n[r];a(t,i)}},this._sendPacket(t),this}a(null,[])},w.prototype.unsubscribe=function(){for(var t={cmd:"unsubscribe",qos:1,messageId:this._nextId()},e=this,n=new Array(arguments.length),r=0;r<arguments.length;r++)n[r]=arguments[r];var i=n.shift(),o=n.pop()||y,s=n.pop();return"string"===typeof i&&(i=[i]),"function"!==typeof o&&(s=o,o=y),this._checkDisconnecting(o)||("string"===typeof i?t.unsubscriptions=[i]:"object"===typeof i&&i.length&&(t.unsubscriptions=i),this.options.resubscribe&&t.unsubscriptions.forEach((function(t){delete e._resubscribeTopics[t]})),"object"===typeof s&&s.properties&&(t.properties=s.properties),this.outgoing[t.messageId]={volatile:!0,cb:o},this._sendPacket(t)),this},w.prototype.end=function(){var t=this,e=arguments[0],n=arguments[1],r=arguments[2];function i(){t.disconnected=!0,t.incomingStore.close((function(){t.outgoingStore.close((function(){r&&r.apply(null,arguments),t.emit("end")}))})),t._deferredReconnect&&t._deferredReconnect()}function o(){t._cleanUp(e,p.bind(null,i),n)}return null!=e&&"boolean"===typeof e||(r=n||y,n=e,e=!1,"object"!==typeof n&&(r=n,n=null,"function"!==typeof r&&(r=y))),"object"!==typeof n&&(r=n,n=null),r=r||y,this.disconnecting||(this._clearReconnect(),this.disconnecting=!0,!e&&Object.keys(this.outgoing).length>0?this.once("outgoingEmpty",setTimeout.bind(null,o,10)):o()),this},w.prototype.removeOutgoingMessage=function(t){var e=this.outgoing[t]?this.outgoing[t].cb:null;return delete this.outgoing[t],this.outgoingStore.del({messageId:t},(function(){e(new Error("Message removed"))})),this},w.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},w.prototype._reconnect=function(){this.emit("reconnect"),this._setupStream()},w.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))},w.prototype._clearReconnect=function(){this.reconnectTimer&&(clearInterval(this.reconnectTimer),this.reconnectTimer=null)},w.prototype._cleanUp=function(t,e){var n=arguments[2];if(e&&this.stream.on("close",e),t)0===this.options.reconnectPeriod&&this.options.clean&&g(this.outgoing),this.stream.destroy();else{var r=f({cmd:"disconnect"},n);this._sendPacket(r,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())},w.prototype._sendPacket=function(t,e,n){if(n=n||y,this.connected){switch(this._shiftPingInterval(),t.cmd){case"publish":break;case"pubrel":return void b(this,t,e,n);default:return void _(this,t,e)}switch(t.qos){case 2:case 1:b(this,t,e,n);break;case 0:default:_(this,t,e);break}}else this._storePacket(t,e,n)},w.prototype._storePacket=function(t,e,n){n=n||y,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.outgoing[t.messageId].cb:null,this.outgoingStore.put(t,(function(t){if(t)return e&&e(t);n()}))):e&&e(new Error("No connection to broker"))},w.prototype._setupPingTimer=function(){var t=this;!this.pingTimer&&this.options.keepalive&&(this.pingResp=!0,this.pingTimer=u((function(){t._checkPing()}),1e3*this.options.keepalive))},w.prototype._shiftPingInterval=function(){this.pingTimer&&this.options.keepalive&&this.options.reschedulePings&&this.pingTimer.reschedule(1e3*this.options.keepalive)},w.prototype._checkPing=function(){this.pingResp?(this.pingResp=!1,this._sendPacket({cmd:"pingreq"})):this._cleanUp(!0)},w.prototype._handlePingresp=function(){this.pingResp=!0},w.prototype._handleConnack=function(t){var e=this.options,n=e.protocolVersion,r=5===n?t.reasonCode:t.returnCode;if(clearTimeout(this.connackTimer),t.properties&&(t.properties.topicAliasMaximum&&(e.properties||(e.properties={}),e.properties.topicAliasMaximum=t.properties.topicAliasMaximum),t.properties.serverKeepAlive&&e.keepalive&&(e.keepalive=t.properties.serverKeepAlive,this._shiftPingInterval()),t.properties.maximumPacketSize&&(e.properties||(e.properties={}),e.properties.maximumPacketSize=t.properties.maximumPacketSize)),0===r)this.reconnecting=!1,this._onConnect(t);else if(r>0){var i=new Error("Connection refused: "+d[r]);i.code=r,this.emit("error",i)}},w.prototype._handlePublish=function(t,e){e="undefined"!==typeof e?e:y;var n=t.topic.toString(),r=t.payload,i=t.qos,o=t.messageId,s=this,a=this.options,c=[0,16,128,131,135,144,145,151,153];switch(i){case 2:a.customHandleAcks(n,r,t,(function(n,r){return n instanceof Error||(r=n,n=null),n?s.emit("error",n):-1===c.indexOf(r)?s.emit("error",new Error("Wrong reason code for pubrec")):void(r?s._sendPacket({cmd:"pubrec",messageId:o,reasonCode:r},e):s.incomingStore.put(t,(function(){s._sendPacket({cmd:"pubrec",messageId:o},e)})))}));break;case 1:a.customHandleAcks(n,r,t,(function(i,a){return i instanceof Error||(a=i,i=null),i?s.emit("error",i):-1===c.indexOf(a)?s.emit("error",new Error("Wrong reason code for puback")):(a||s.emit("message",n,r,t),void s.handleMessage(t,(function(t){if(t)return e&&e(t);s._sendPacket({cmd:"puback",messageId:o,reasonCode:a},e)})))}));break;case 0:this.emit("message",n,r,t),this.handleMessage(t,e);break;default:break}},w.prototype.handleMessage=function(t,e){e()},w.prototype._handleAck=function(t){var e,n=t.messageId,r=t.cmd,i=null,o=this.outgoing[n]?this.outgoing[n].cb:null,s=this;if(o){switch(r){case"pubcomp":case"puback":var a=t.reasonCode;a&&a>0&&16!==a&&(e=new Error("Publish error: "+d[a]),e.code=a,o(e,t)),delete this.outgoing[n],this.outgoingStore.del(t,o);break;case"pubrec":i={cmd:"pubrel",qos:2,messageId:n};var c=t.reasonCode;c&&c>0&&16!==c?(e=new Error("Publish error: "+d[c]),e.code=c,o(e,t)):this._sendPacket(i);break;case"suback":delete this.outgoing[n];for(var u=0;u<t.granted.length;u++)if(0!==(128&t.granted[u])){var l=this.messageIdToTopic[n];l&&l.forEach((function(t){delete s._resubscribeTopics[t]}))}o(null,t);break;case"unsuback":delete this.outgoing[n],o(null);break;default:s.emit("error",new Error("unrecognized packet type"))}this.disconnecting&&0===Object.keys(this.outgoing).length&&this.emit("outgoingEmpty")}},w.prototype._handlePubrel=function(t,e){e="undefined"!==typeof e?e:y;var n=t.messageId,r=this,i={cmd:"pubcomp",messageId:n};r.incomingStore.get(t,(function(t,n){t?r._sendPacket(i,e):(r.emit("message",n.topic,n.payload,n),r.handleMessage(n,(function(t){if(t)return e(t);r.incomingStore.del(n,y),r._sendPacket(i,e)})))}))},w.prototype._handleDisconnect=function(t){this.emit("disconnect",t)},w.prototype._nextId=function(){var t=this.nextId++;return 65536===this.nextId&&(this.nextId=1),t},w.prototype.getLastMessageId=function(){return 1===this.nextId?65535:this.nextId-1},w.prototype._resubscribe=function(t){var e=Object.keys(this._resubscribeTopics);if(!this._firstConnection&&(this.options.clean||5===this.options.protocolVersion&&!t.sessionPresent)&&e.length>0)if(this.options.resubscribe)if(5===this.options.protocolVersion)for(var n=0;n<e.length;n++){var r={};r[e[n]]=this._resubscribeTopics[e[n]],r.resubscribe=!0,this.subscribe(r,{properties:r[e[n]].properties})}else this._resubscribeTopics.resubscribe=!0,this.subscribe(this._resubscribeTopics);else this._resubscribeTopics={};this._firstConnection=!1},w.prototype._onConnect=function(t){if(this.disconnected)this.emit("connect",t);else{var e=this;this._setupPingTimer(),this._resubscribe(t),this.connected=!0,n()}function n(){var r=e.outgoingStore.createStream();function i(){e._storeProcessing=!1,e._packetIdsDuringStoreProcessing={}}function o(){r.destroy(),r=null,i()}function s(){if(r){e._storeProcessing=!0;var t,n=r.read(1);n?e._packetIdsDuringStoreProcessing[n.messageId]?s():e.disconnecting||e.reconnectTimer?r.destroy&&r.destroy():(t=e.outgoing[n.messageId]?e.outgoing[n.messageId].cb:null,e.outgoing[n.messageId]={volatile:!1,cb:function(e,n){t&&t(e,n),s()}},e._packetIdsDuringStoreProcessing[n.messageId]=!0,e._sendPacket(n)):r.once("readable",s)}}e.once("close",o),r.on("error",(function(t){i(),e.removeListener("close",o),e.emit("error",t)})),r.on("end",(function(){var r=!0;for(var s in e._packetIdsDuringStoreProcessing)if(!e._packetIdsDuringStoreProcessing[s]){r=!1;break}r?(i(),e.removeListener("close",o),e.emit("connect",t)):n()})),s()}},n.exports=w}).call(this,t("_process"),"undefined"!==typeof e?e:"undefined"!==typeof self?self:"undefined"!==typeof window?window:{})},{"./store":7,"./validations":8,_process:92,events:13,inherits:80,"mqtt-packet":84,"readable-stream":108,reinterval:109,xtend:121}],2:[function(t,e,n){(function(n){"use strict";var r,i,o,s=t("readable-stream").Transform,a=t("duplexify"),c=t("base64-js"),u=!1;function l(){var t=new s;return t._write=function(t,e,n){r.sendSocketMessage({data:t.buffer,success:function(){n()},fail:function(){n(new Error)}})},t._flush=function(t){r.closeSocket({success:function(){t()}})},t}function f(t){t.hostname||(t.hostname="localhost"),t.path||(t.path="/"),t.wsOptions||(t.wsOptions={})}function p(t,e){var n="alis"===t.protocol?"wss":"ws",r=n+"://"+t.hostname+t.path;return t.port&&80!==t.port&&443!==t.port&&(r=n+"://"+t.hostname+":"+t.port+t.path),"function"===typeof t.transformWsUrl&&(r=t.transformWsUrl(r,t,e)),r}function h(){u||(u=!0,r.onSocketOpen((function(){o.setReadable(i),o.setWritable(i),o.emit("connect")})),r.onSocketMessage((function(t){if("string"===typeof t.data){var e=c.toByteArray(t.data),r=n.from(e);i.push(r)}else{var o=new FileReader;o.addEventListener("load",(function(){var t=o.result;t=t instanceof ArrayBuffer?n.from(t):n.from(t,"utf8"),i.push(t)})),o.readAsArrayBuffer(t.data)}})),r.onSocketClose((function(){o.end(),o.destroy()})),r.onSocketError((function(t){o.destroy(t)})))}function d(t,e){if(e.hostname=e.hostname||e.host,!e.hostname)throw new Error("Could not determine host. Specify host manually.");var n="MQIsdp"===e.protocolId&&3===e.protocolVersion?"mqttv3.1":"mqtt";f(e);var s=p(e,t);return r=e.my,r.connectSocket({url:s,protocols:n}),i=l(),o=a.obj(),h(),o}e.exports=d}).call(this,t("buffer").Buffer)},{"base64-js":10,buffer:12,duplexify:17,"readable-stream":108}],3:[function(t,e,n){"use strict";var r=t("net");function i(t,e){var n,i;return e.port=e.port||1883,e.hostname=e.hostname||e.host||"localhost",n=e.port,i=e.hostname,r.createConnection(n,i)}e.exports=i},{net:11}],4:[function(t,e,n){"use strict";var r=t("tls");function i(t,e){var n;function i(r){e.rejectUnauthorized&&t.emit("error",r),n.end()}return e.port=e.port||8883,e.host=e.hostname||e.host||"localhost",e.rejectUnauthorized=!1!==e.rejectUnauthorized,delete e.path,n=r.connect(e),n.on("secureConnect",(function(){e.rejectUnauthorized&&!n.authorized?n.emit("error",new Error("TLS not authorized")):n.removeListener("error",i)})),n.on("error",i),n}e.exports=i},{tls:11}],5:[function(t,e,n){(function(n){"use strict";var r=t("websocket-stream"),i=t("url"),o=["rejectUnauthorized","ca","cert","key","pfx","passphrase"],s="browser"===n.title;function a(t,e){var n=t.protocol+"://"+t.hostname+":"+t.port+t.path;return"function"===typeof t.transformWsUrl&&(n=t.transformWsUrl(n,t,e)),n}function c(t){t.hostname||(t.hostname="localhost"),t.port||("wss"===t.protocol?t.port=443:t.port=80),t.path||(t.path="/"),t.wsOptions||(t.wsOptions={}),s||"wss"!==t.protocol||o.forEach((function(e){t.hasOwnProperty(e)&&!t.wsOptions.hasOwnProperty(e)&&(t.wsOptions[e]=t[e])}))}function u(t,e){var n="MQIsdp"===e.protocolId&&3===e.protocolVersion?"mqttv3.1":"mqtt";c(e);var i=a(e,t);return r(i,[n],e.wsOptions)}function l(t,e){return u(t,e)}function f(t,e){if(e.hostname||(e.hostname=e.host),!e.hostname){if("undefined"===typeof document)throw new Error("Could not determine host. 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i.CMD_SHIFT=4,i.CMD_MASK=240,i.DUP_MASK=8,i.QOS_MASK=3,i.QOS_SHIFT=1,i.RETAIN_MASK=1,i.LENGTH_MASK=127,i.LENGTH_FIN_MASK=128,i.SESSIONPRESENT_MASK=1,i.SESSIONPRESENT_HEADER=r.from([i.SESSIONPRESENT_MASK]),i.CONNACK_HEADER=r.from([i.codes["connack"]<<i.CMD_SHIFT]),i.USERNAME_MASK=128,i.PASSWORD_MASK=64,i.WILL_RETAIN_MASK=32,i.WILL_QOS_MASK=24,i.WILL_QOS_SHIFT=3,i.WILL_FLAG_MASK=4,i.CLEAN_SESSION_MASK=2,i.CONNECT_HEADER=r.from([i.codes["connect"]<<i.CMD_SHIFT]),i.properties={sessionExpiryInterval:17,willDelayInterval:24,receiveMaximum:33,maximumPacketSize:39,topicAliasMaximum:34,requestResponseInformation:25,requestProblemInformation:23,userProperties:38,authenticationMethod:21,authenticationData:22,payloadFormatIndicator:1,messageExpiryInterval:2,contentType:3,responseTopic:8,correlationData:9,maximumQoS:36,retainAvailable:37,assignedClientIdentifier:18,reasonString:31,wildcardSubscriptionAvailable:40,subscriptionIdentifiersAvailable:41,sharedSubscriptionAvailable:42,serverKeepAlive:19,responseInformation:26,serverReference:28,topicAlias:35,subscriptionIdentifier:11},i.propertiesCodes={},i.properties){var c=i.properties[a];i.propertiesCodes[c]=a}function u(t){return[0,1,2].map((function(e){return[0,1].map((function(n){return[0,1].map((function(o){var s=new r(1);return s.writeUInt8(i.codes[t]<<i.CMD_SHIFT|(n?i.DUP_MASK:0)|e<<i.QOS_SHIFT|o,0,!0),s}))}))}))}i.propertiesTypes={sessionExpiryInterval:"int32",willDelayInterval:"int32",receiveMaximum:"int16",maximumPacketSize:"int32",topicAliasMaximum:"int16",requestResponseInformation:"byte",requestProblemInformation:"byte",userProperties:"pair",authenticationMethod:"string",authenticationData:"binary",payloadFormatIndicator:"byte",messageExpiryInterval:"int32",contentType:"string",responseTopic:"string",correlationData:"binary",maximumQoS:"int8",retainAvailable:"byte",assignedClientIdentifier:"string",reasonString:"string",wildcardSubscriptionAvailable:"byte",subscriptionIdentifiersAvailable:"byte",sharedSubscriptionAvailable:"byte",serverKeepAlive:"int32",responseInformation:"string",serverReference:"string",topicAlias:"int16",subscriptionIdentifier:"var"},i.PUBLISH_HEADER=u("publish"),i.SUBSCRIBE_HEADER=u("subscribe"),i.SUBSCRIBE_OPTIONS_QOS_MASK=3,i.SUBSCRIBE_OPTIONS_NL_MASK=1,i.SUBSCRIBE_OPTIONS_NL_SHIFT=2,i.SUBSCRIBE_OPTIONS_RAP_MASK=1,i.SUBSCRIBE_OPTIONS_RAP_SHIFT=3,i.SUBSCRIBE_OPTIONS_RH_MASK=3,i.SUBSCRIBE_OPTIONS_RH_SHIFT=4,i.SUBSCRIBE_OPTIONS_RH=[0,16,32],i.SUBSCRIBE_OPTIONS_NL=4,i.SUBSCRIBE_OPTIONS_RAP=8,i.SUBSCRIBE_OPTIONS_QOS=[0,1,2],i.UNSUBSCRIBE_HEADER=u("unsubscribe"),i.ACKS={unsuback:u("unsuback"),puback:u("puback"),pubcomp:u("pubcomp"),pubrel:u("pubrel"),pubrec:u("pubrec")},i.SUBACK_HEADER=r.from([i.codes["suback"]<<i.CMD_SHIFT]),i.VERSION3=r.from([3]),i.VERSION4=r.from([4]),i.VERSION5=r.from([5]),i.QOS=[0,1,2].map((function(t){return r.from([t])})),i.EMPTY={pingreq:r.from([i.codes["pingreq"]<<4,0]),pingresp:r.from([i.codes["pingresp"]<<4,0]),disconnect:r.from([i.codes["disconnect"]<<4,0])}},{"safe-buffer":110}],83:[function(t,e,n){"use strict";var r=t("safe-buffer").Buffer,i=t("./writeToStream"),o=t("events").EventEmitter,s=t("inherits");function a(t,e){var n=new c;return i(t,n,e),n.concat()}function c(){this._array=new Array(20),this._i=0}s(c,o),c.prototype.write=function(t){return this._array[this._i++]=t,!0},c.prototype.concat=function(){var t,e,n=0,i=new Array(this._array.length),o=this._array,s=0;for(t=0;t<o.length&&void 0!==o[t];t++)"string"!==typeof o[t]?i[t]=o[t].length:i[t]=r.byteLength(o[t]),n+=i[t];for(e=r.allocUnsafe(n),t=0;t<o.length&&void 0!==o[t];t++)"string"!==typeof o[t]?(o[t].copy(e,s),s+=i[t]):(e.write(o[t],s),s+=i[t]);return e},e.exports=a},{"./writeToStream":89,events:13,inherits:80,"safe-buffer":110}],84:[function(t,e,n){"use strict";n.parser=t("./parser"),n.generate=t("./generate"),n.writeToStream=t("./writeToStream")},{"./generate":83,"./parser":88,"./writeToStream":89}],85:[function(t,e,n){var r=t("readable-stream/duplex"),i=t("util"),o=t("safe-buffer").Buffer;function s(t){if(!(this instanceof s))return new s(t);if(this._bufs=[],this.length=0,"function"==typeof t){this._callback=t;var e=function(t){this._callback&&(this._callback(t),this._callback=null)}.bind(this);this.on("pipe",(function(t){t.on("error",e)})),this.on("unpipe",(function(t){t.removeListener("error",e)}))}else this.append(t);r.call(this)}i.inherits(s,r),s.prototype._offset=function(t){var e,n=0,r=0;if(0===t)return[0,0];for(;r<this._bufs.length;r++){if(e=n+this._bufs[r].length,t<e||r==this._bufs.length-1)return[r,t-n];n=e}},s.prototype.append=function(t){var e=0;if(o.isBuffer(t))this._appendBuffer(t);else if(Array.isArray(t))for(;e<t.length;e++)this.append(t[e]);else if(t instanceof s)for(;e<t._bufs.length;e++)this.append(t._bufs[e]);else null!=t&&("number"==typeof t&&(t=t.toString()),this._appendBuffer(o.from(t)));return this},s.prototype._appendBuffer=function(t){this._bufs.push(t),this.length+=t.length},s.prototype._write=function(t,e,n){this._appendBuffer(t),"function"==typeof n&&n()},s.prototype._read=function(t){if(!this.length)return this.push(null);t=Math.min(t,this.length),this.push(this.slice(0,t)),this.consume(t)},s.prototype.end=function(t){r.prototype.end.call(this,t),this._callback&&(this._callback(null,this.slice()),this._callback=null)},s.prototype.get=function(t){return this.slice(t,t+1)[0]},s.prototype.slice=function(t,e){return"number"==typeof t&&t<0&&(t+=this.length),"number"==typeof e&&e<0&&(e+=this.length),this.copy(null,0,t,e)},s.prototype.copy=function(t,e,n,r){if(("number"!=typeof n||n<0)&&(n=0),("number"!=typeof r||r>this.length)&&(r=this.length),n>=this.length)return t||o.alloc(0);if(r<=0)return t||o.alloc(0);var i,s,a=!!t,c=this._offset(n),u=r-n,l=u,f=a&&e||0,p=c[1];if(0===n&&r==this.length){if(!a)return 1===this._bufs.length?this._bufs[0]:o.concat(this._bufs,this.length);for(s=0;s<this._bufs.length;s++)this._bufs[s].copy(t,f),f+=this._bufs[s].length;return t}if(l<=this._bufs[c[0]].length-p)return a?this._bufs[c[0]].copy(t,e,p,p+l):this._bufs[c[0]].slice(p,p+l);for(a||(t=o.allocUnsafe(u)),s=c[0];s<this._bufs.length;s++){if(i=this._bufs[s].length-p,!(l>i)){this._bufs[s].copy(t,f,p,p+l);break}this._bufs[s].copy(t,f,p),f+=i,l-=i,p&&(p=0)}return t},s.prototype.shallowSlice=function(t,e){t=t||0,e=e||this.length,t<0&&(t+=this.length),e<0&&(e+=this.length);var n=this._offset(t),r=this._offset(e),i=this._bufs.slice(n[0],r[0]+1);return 0==r[1]?i.pop():i[i.length-1]=i[i.length-1].slice(0,r[1]),0!=n[1]&&(i[0]=i[0].slice(n[1])),new s(i)},s.prototype.toString=function(t,e,n){return this.slice(e,n).toString(t)},s.prototype.consume=function(t){while(this._bufs.length){if(!(t>=this._bufs[0].length)){this._bufs[0]=this._bufs[0].slice(t),this.length-=t;break}t-=this._bufs[0].length,this.length-=this._bufs[0].length,this._bufs.shift()}return this},s.prototype.duplicate=function(){for(var t=0,e=new s;t<this._bufs.length;t++)e.append(this._bufs[t]);return e},s.prototype.destroy=function(){this._bufs.length=0,this.length=0,this.push(null)},function(){var t={readDoubleBE:8,readDoubleLE:8,readFloatBE:4,readFloatLE:4,readInt32BE:4,readInt32LE:4,readUInt32BE:4,readUInt32LE:4,readInt16BE:2,readInt16LE:2,readUInt16BE:2,readUInt16LE:2,readInt8:1,readUInt8:1};for(var e in t)(function(e){s.prototype[e]=function(n){return this.slice(n,n+t[e])[e](0)}})(e)}(),e.exports=s},{"readable-stream/duplex":97,"safe-buffer":110,util:117}],86:[function(t,e,n){"use strict";var r=t("safe-buffer").Buffer,i=65536,o={};function s(t){var e=r.allocUnsafe(2);return e.writeUInt8(t>>8,0),e.writeUInt8(255&t,1),e}function a(){for(var t=0;t<i;t++)o[t]=s(t)}function c(t){return t>=0&&t<128?1:t>=128&&t<16384?2:t>=16384&&t<2097152?3:t>=2097152&&t<268435456?4:0}function u(t){var e=0,n=0,i=c(t),o=r.allocUnsafe(i);do{e=t%128|0,t=t/128|0,t>0&&(e|=128),o.writeUInt8(e,n++)}while(t>0);return{data:o,length:i}}function l(t){var e=r.allocUnsafe(4);return e.writeUInt32BE(t,0),e}e.exports={cache:o,generateCache:a,generateNumber:s,genBufVariableByteInt:u,generate4ByteBuffer:l}},{"safe-buffer":110}],87:[function(t,e,n){function r(){this.cmd=null,this.retain=!1,this.qos=0,this.dup=!1,this.length=-1,this.topic=null,this.payload=null}e.exports=r},{}],88:[function(t,e,n){"use strict";var r=t("bl"),i=t("inherits"),o=t("events").EventEmitter,s=t("./packet"),a=t("./constants");function c(t){if(!(this instanceof c))return new c(t);this.settings=t||{},this._states=["_parseHeader","_parseLength","_parsePayload","_newPacket"],this._resetState()}i(c,o),c.prototype._resetState=function(){this.packet=new s,this.error=null,this._list=r(),this._stateCounter=0},c.prototype.parse=function(t){this.error&&this._resetState(),this._list.append(t);while((-1!==this.packet.length||this._list.length>0)&&this[this._states[this._stateCounter]]()&&!this.error)this._stateCounter++,this._stateCounter>=this._states.length&&(this._stateCounter=0);return this._list.length},c.prototype._parseHeader=function(){var t=this._list.readUInt8(0);return this.packet.cmd=a.types[t>>a.CMD_SHIFT],this.packet.retain=0!==(t&a.RETAIN_MASK),this.packet.qos=t>>a.QOS_SHIFT&a.QOS_MASK,this.packet.dup=0!==(t&a.DUP_MASK),this._list.consume(1),!0},c.prototype._parseLength=function(){var t=this._parseVarByteNum(!0);return t&&(this.packet.length=t.value,this._list.consume(t.bytes)),!!t},c.prototype._parsePayload=function(){var t=!1;if(0===this.packet.length||this._list.length>=this.packet.length){switch(this._pos=0,this.packet.cmd){case"connect":this._parseConnect();break;case"connack":this._parseConnack();break;case"publish":this._parsePublish();break;case"puback":case"pubrec":case"pubrel":case"pubcomp":this._parseConfirmation();break;case"subscribe":this._parseSubscribe();break;case"suback":this._parseSuback();break;case"unsubscribe":this._parseUnsubscribe();break;case"unsuback":this._parseUnsuback();break;case"pingreq":case"pingresp":break;case"disconnect":this._parseDisconnect();break;case"auth":this._parseAuth();break;default:this._emitError(new Error("Not supported"))}t=!0}return t},c.prototype._parseConnect=function(){var t,e,n,r,i,o,s={},c=this.packet;if(t=this._parseString(),null===t)return this._emitError(new Error("Cannot parse protocolId"));if("MQTT"!==t&&"MQIsdp"!==t)return this._emitError(new Error("Invalid protocolId"));if(c.protocolId=t,this._pos>=this._list.length)return this._emitError(new Error("Packet too short"));if(c.protocolVersion=this._list.readUInt8(this._pos),3!==c.protocolVersion&&4!==c.protocolVersion&&5!==c.protocolVersion)return this._emitError(new Error("Invalid protocol version"));if(this._pos++,this._pos>=this._list.length)return this._emitError(new Error("Packet too short"));if(s.username=this._list.readUInt8(this._pos)&a.USERNAME_MASK,s.password=this._list.readUInt8(this._pos)&a.PASSWORD_MASK,s.will=this._list.readUInt8(this._pos)&a.WILL_FLAG_MASK,s.will&&(c.will={},c.will.retain=0!==(this._list.readUInt8(this._pos)&a.WILL_RETAIN_MASK),c.will.qos=(this._list.readUInt8(this._pos)&a.WILL_QOS_MASK)>>a.WILL_QOS_SHIFT),c.clean=0!==(this._list.readUInt8(this._pos)&a.CLEAN_SESSION_MASK),this._pos++,c.keepalive=this._parseNum(),-1===c.keepalive)return this._emitError(new Error("Packet too short"));if(5===c.protocolVersion){var u=this._parseProperties();Object.getOwnPropertyNames(u).length&&(c.properties=u)}if(e=this._parseString(),null===e)return this._emitError(new Error("Packet too short"));if(c.clientId=e,s.will){if(5===c.protocolVersion){var l=this._parseProperties();Object.getOwnPropertyNames(l).length&&(c.will.properties=l)}if(n=this._parseString(),null===n)return this._emitError(new Error("Cannot parse will topic"));if(c.will.topic=n,r=this._parseBuffer(),null===r)return this._emitError(new Error("Cannot parse will payload"));c.will.payload=r}if(s.username){if(o=this._parseString(),null===o)return this._emitError(new Error("Cannot parse username"));c.username=o}if(s.password){if(i=this._parseBuffer(),null===i)return this._emitError(new Error("Cannot parse password"));c.password=i}return this.settings=c,c},c.prototype._parseConnack=function(){var t=this.packet;if(this._list.length<2)return null;if(t.sessionPresent=!!(this._list.readUInt8(this._pos++)&a.SESSIONPRESENT_MASK),5===this.settings.protocolVersion?t.reasonCode=this._list.readUInt8(this._pos++):t.returnCode=this._list.readUInt8(this._pos++),-1===t.returnCode||-1===t.reasonCode)return this._emitError(new Error("Cannot parse return code"));if(5===this.settings.protocolVersion){var e=this._parseProperties();Object.getOwnPropertyNames(e).length&&(t.properties=e)}},c.prototype._parsePublish=function(){var t=this.packet;if(t.topic=this._parseString(),null===t.topic)return this._emitError(new Error("Cannot parse topic"));if(!(t.qos>0)||this._parseMessageId()){if(5===this.settings.protocolVersion){var e=this._parseProperties();Object.getOwnPropertyNames(e).length&&(t.properties=e)}t.payload=this._list.slice(this._pos,t.length)}},c.prototype._parseSubscribe=function(){var t,e,n,r,i,o,s,c=this.packet;if(1!==c.qos)return this._emitError(new Error("Wrong subscribe header"));if(c.subscriptions=[],this._parseMessageId()){if(5===this.settings.protocolVersion){var u=this._parseProperties();Object.getOwnPropertyNames(u).length&&(c.properties=u)}while(this._pos<c.length){if(t=this._parseString(),null===t)return this._emitError(new Error("Cannot parse topic"));e=this._parseByte(),n=e&a.SUBSCRIBE_OPTIONS_QOS_MASK,o=0!==(e>>a.SUBSCRIBE_OPTIONS_NL_SHIFT&a.SUBSCRIBE_OPTIONS_NL_MASK),i=0!==(e>>a.SUBSCRIBE_OPTIONS_RAP_SHIFT&a.SUBSCRIBE_OPTIONS_RAP_MASK),r=e>>a.SUBSCRIBE_OPTIONS_RH_SHIFT&a.SUBSCRIBE_OPTIONS_RH_MASK,s={topic:t,qos:n},5===this.settings.protocolVersion&&(s.nl=o,s.rap=i,s.rh=r),c.subscriptions.push(s)}}},c.prototype._parseSuback=function(){var t=this.packet;if(this.packet.granted=[],this._parseMessageId()){if(5===this.settings.protocolVersion){var e=this._parseProperties();Object.getOwnPropertyNames(e).length&&(t.properties=e)}while(this._pos<this.packet.length)this.packet.granted.push(this._list.readUInt8(this._pos++))}},c.prototype._parseUnsubscribe=function(){var t=this.packet;if(t.unsubscriptions=[],this._parseMessageId()){if(5===this.settings.protocolVersion){var e=this._parseProperties();Object.getOwnPropertyNames(e).length&&(t.properties=e)}while(this._pos<t.length){var n;if(n=this._parseString(),null===n)return this._emitError(new Error("Cannot parse topic"));t.unsubscriptions.push(n)}}},c.prototype._parseUnsuback=function(){var t=this.packet;if(!this._parseMessageId())return this._emitError(new Error("Cannot parse messageId"));if(5===this.settings.protocolVersion){var e=this._parseProperties();Object.getOwnPropertyNames(e).length&&(t.properties=e),t.granted=[];while(this._pos<this.packet.length)this.packet.granted.push(this._list.readUInt8(this._pos++))}},c.prototype._parseConfirmation=function(){var t=this.packet;if(this._parseMessageId(),5===this.settings.protocolVersion&&t.length>2){t.reasonCode=this._parseByte();var e=this._parseProperties();Object.getOwnPropertyNames(e).length&&(t.properties=e)}return!0},c.prototype._parseDisconnect=function(){var t=this.packet;if(5===this.settings.protocolVersion){t.reasonCode=this._parseByte();var e=this._parseProperties();Object.getOwnPropertyNames(e).length&&(t.properties=e)}return!0},c.prototype._parseAuth=function(){var t=this.packet;if(5!==this.settings.protocolVersion)return this._emitError(new Error("Not supported auth packet for this version MQTT"));t.reasonCode=this._parseByte();var e=this._parseProperties();return Object.getOwnPropertyNames(e).length&&(t.properties=e),!0},c.prototype._parseMessageId=function(){var t=this.packet;return t.messageId=this._parseNum(),null!==t.messageId||(this._emitError(new Error("Cannot parse messageId")),!1)},c.prototype._parseString=function(t){var e,n=this._parseNum(),r=n+this._pos;return-1===n||r>this._list.length||r>this.packet.length?null:(e=this._list.toString("utf8",this._pos,r),this._pos+=n,e)},c.prototype._parseStringPair=function(){return{name:this._parseString(),value:this._parseString()}},c.prototype._parseBuffer=function(){var t,e=this._parseNum(),n=e+this._pos;return-1===e||n>this._list.length||n>this.packet.length?null:(t=this._list.slice(this._pos,n),this._pos+=e,t)},c.prototype._parseNum=function(){if(this._list.length-this._pos<2)return-1;var t=this._list.readUInt16BE(this._pos);return this._pos+=2,t},c.prototype._parse4ByteNum=function(){if(this._list.length-this._pos<4)return-1;var t=this._list.readUInt32BE(this._pos);return this._pos+=4,t},c.prototype._parseVarByteNum=function(t){var e,n=0,r=1,i=0,o=!0,s=this._pos?this._pos:0;while(n<5){if(e=this._list.readUInt8(s+n++),i+=r*(e&a.LENGTH_MASK),r*=128,0===(e&a.LENGTH_FIN_MASK))break;if(this._list.length<=n){o=!1;break}}return s&&(this._pos+=n),o=!!o&&(t?{bytes:n,value:i}:i),o},c.prototype._parseByte=function(){var t=this._list.readUInt8(this._pos);return this._pos++,t},c.prototype._parseByType=function(t){switch(t){case"byte":return 0!==this._parseByte();case"int8":return this._parseByte();case"int16":return this._parseNum();case"int32":return this._parse4ByteNum();case"var":return this._parseVarByteNum();case"string":return this._parseString();case"pair":return this._parseStringPair();case"binary":return this._parseBuffer()}},c.prototype._parseProperties=function(){var t=this._parseVarByteNum(),e=this._pos,n=e+t,r={};while(this._pos<n){var i=this._parseByte(),o=a.propertiesCodes[i];if(!o)return this._emitError(new Error("Unknown property")),!1;if("userProperties"!==o)r[o]=this._parseByType(a.propertiesTypes[o]);else{r[o]||(r[o]={});var s=this._parseByType(a.propertiesTypes[o]);r[o][s.name]=s.value}}return r},c.prototype._newPacket=function(){return this.packet&&(this._list.consume(this.packet.length),this.emit("packet",this.packet)),this.packet=new s,this._pos=0,!0},c.prototype._emitError=function(t){this.error=t,this.emit("error",t)},e.exports=c},{"./constants":82,"./packet":87,bl:85,events:13,inherits:80}],89:[function(t,e,n){"use strict";var r=t("./constants"),i=t("safe-buffer").Buffer,o=i.allocUnsafe(0),s=i.from([0]),a=t("./numbers"),c=t("process-nextick-args").nextTick,u=a.cache,l=a.generateNumber,f=a.generateCache,p=a.genBufVariableByteInt,h=a.generate4ByteBuffer,d=M,m=!0;function _(t,e,n){switch(e.cork&&(e.cork(),c(g,e)),m&&(m=!1,f()),t.cmd){case"connect":return v(t,e,n);case"connack":return b(t,e,n);case"publish":return y(t,e,n);case"puback":case"pubrec":case"pubrel":case"pubcomp":return w(t,e,n);case"subscribe":return S(t,e,n);case"suback":return x(t,e,n);case"unsubscribe":return k(t,e,n);case"unsuback":return E(t,e,n);case"pingreq":case"pingresp":return O(t,e,n);case"disconnect":return I(t,e,n);case"auth":return j(t,e,n);default:return e.emit("error",new Error("Unknown command")),!1}}function g(t){t.uncork()}function v(t,e,n){var o=t||{},s=o.protocolId||"MQTT",a=o.protocolVersion||4,c=o.will,u=o.clean,l=o.keepalive||0,f=o.clientId||"",p=o.username,h=o.password,m=o.properties;void 0===u&&(u=!0);var _=0;if(!s||"string"!==typeof s&&!i.isBuffer(s))return e.emit("error",new Error("Invalid protocolId")),!1;if(_+=s.length+2,3!==a&&4!==a&&5!==a)return e.emit("error",new Error("Invalid protocol version")),!1;if(_+=1,"string"!==typeof f&&!i.isBuffer(f)||!f&&4!==a||!f&&!u){if(a<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 _+=f.length+2;if("number"!==typeof l||l<0||l>65535||l%1!==0)return e.emit("error",new Error("Invalid keepalive")),!1;if(_+=2,_+=1,5===a){var g=R(e,m);_+=g.length}if(c){if("object"!==typeof c)return e.emit("error",new Error("Invalid 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p=null;if(5===o&&(p=R(e,l),f+=p.length),"object"!==typeof u||!u.length)return e.emit("error",new Error("Invalid subscriptions")),!1;for(var h=0;h<u.length;h+=1){var m=u[h].topic,_=u[h].qos;if("string"!==typeof m)return e.emit("error",new Error("Invalid subscriptions - invalid topic")),!1;if("number"!==typeof _)return e.emit("error",new Error("Invalid subscriptions - invalid qos")),!1;if(5===o){var g=u[h].nl||!1;if("boolean"!==typeof g)return e.emit("error",new Error("Invalid subscriptions - invalid No Local")),!1;var v=u[h].rap||!1;if("boolean"!==typeof v)return e.emit("error",new Error("Invalid subscriptions - invalid Retain as Published")),!1;var b=u[h].rh||0;if("number"!==typeof b||b>2)return e.emit("error",new Error("Invalid subscriptions - invalid Retain Handling")),!1}f+=i.byteLength(m)+2+1}e.write(r.SUBSCRIBE_HEADER[1][a?1:0][0]),T(e,f),d(e,c),null!==p&&p.write();for(var y=!0,w=0;w<u.length;w++){var 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u||!u.length)return e.emit("error",new Error("Invalid unsubscriptions")),!1;for(var p=0;p<u.length;p+=1){if("string"!==typeof u[p])return e.emit("error",new Error("Invalid unsubscriptions")),!1;f+=i.byteLength(u[p])+2}var h=null;5===o&&(h=R(e,l),f+=h.length),e.write(r.UNSUBSCRIBE_HEADER[1][c?1:0][0]),T(e,f),d(e,a),null!==h&&h.write();for(var m=!0,_=0;_<u.length;_++)m=A(e,u[_]);return m}function E(t,e,n){var o=n?n.protocolVersion:4,s=t||{},a=s.messageId,c=s.dup?r.DUP_MASK:0,u=s.granted,l=s.properties,f=s.cmd,p=0,h=2;if("number"!==typeof a)return e.emit("error",new Error("Invalid messageId")),!1;if(5===o){if("object"!==typeof u||!u.length)return e.emit("error",new Error("Invalid qos vector")),!1;for(var m=0;m<u.length;m+=1){if("number"!==typeof u[m])return e.emit("error",new Error("Invalid qos vector")),!1;h+=1}}var _=null;if(5===o){if(_=L(e,l,n,h),!_)return!1;h+=_.length}return e.write(r.ACKS[f][p][c][0]),T(e,h),d(e,a),null!==_&&_.write(),5===o&&e.write(i.from(u)),!0}function 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