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r(t){this.path=t.path,this.hostname=t.hostname,this.port=t.port,this.secure=t.secure,this.query=t.query,this.timestampParam=t.timestampParam,this.timestampRequests=t.timestampRequests,this.readyState="",this.agent=t.agent||!1,this.socket=t.socket,this.enablesXDR=t.enablesXDR,this.pfx=t.pfx,this.key=t.key,this.passphrase=t.passphrase,this.cert=t.cert,this.ca=t.ca,this.ciphers=t.ciphers,this.rejectUnauthorized=t.rejectUnauthorized,this.extraHeaders=t.extraHeaders}var o=t("engine.io-parser"),i=t("component-emitter");e.exports=r,i(r.prototype),r.prototype.onError=function(t,e){var n=new Error(t);return n.type="TransportError",n.description=e,this.emit("error",n),this},r.prototype.open=function(){return("closed"==this.readyState||""==this.readyState)&&(this.readyState="opening",this.doOpen()),this},r.prototype.close=function(){return("opening"==this.readyState||"open"==this.readyState)&&(this.doClose(),this.onClose()),this},r.prototype.send=function(t){if("open"!=this.readyState)throw new 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window?window:{})},{"./polling-jsonp":16,"./polling-xhr":17,"./websocket":19,"xmlhttprequest-ssl":20}],16:[function(t,e,n){(function(n){function r(){}function o(t){i.call(this,t),this.query=this.query||{},a||(n.___eio||(n.___eio=[]),a=n.___eio),this.index=a.length;var e=this;a.push(function(t){e.onData(t)}),this.query.j=this.index,n.document&&n.addEventListener&&n.addEventListener("beforeunload",function(){e.script&&(e.script.onerror=r)},!1)}var i=t("./polling"),s=t("component-inherit");e.exports=o;var a,c=/\n/g,p=/\\n/g;s(o,i),o.prototype.supportsBinary=!1,o.prototype.doClose=function(){this.script&&(this.script.parentNode.removeChild(this.script),this.script=null),this.form&&(this.form.parentNode.removeChild(this.form),this.form=null,this.iframe=null),i.prototype.doClose.call(this)},o.prototype.doPoll=function(){var t=this,e=document.createElement("script");this.script&&(this.script.parentNode.removeChild(this.script),this.script=null),e.async=!0,e.src=this.uri(),e.onerror=function(e){t.onError("jsonp poll error",e)};var n=document.getElementsByTagName("script")[0];n?n.parentNode.insertBefore(e,n):(document.head||document.body).appendChild(e),this.script=e;var r="undefined"!=typeof navigator&&/gecko/i.test(navigator.userAgent);r&&setTimeout(function(){var t=document.createElement("iframe");document.body.appendChild(t),document.body.removeChild(t)},100)},o.prototype.doWrite=function(t,e){function n(){r(),e()}function r(){if(o.iframe)try{o.form.removeChild(o.iframe)}catch(t){o.onError("jsonp polling iframe removal error",t)}try{var e='<iframe src="javascript:0" name="'+o.iframeId+'">';i=document.createElement(e)}catch(t){i=document.createElement("iframe"),i.name=o.iframeId,i.src="javascript:0"}i.id=o.iframeId,o.form.appendChild(i),o.iframe=i}var o=this;if(!this.form){var i,s=document.createElement("form"),a=document.createElement("textarea"),u=this.iframeId="eio_iframe_"+this.index;s.className="socketio",s.style.position="absolute",s.style.top="-1000px",s.style.left="-1000px",s.target=u,s.method="POST",s.setAttribute("accept-charset","utf-8"),a.name="d",s.appendChild(a),document.body.appendChild(s),this.form=s,this.area=a}this.form.action=this.uri(),r(),t=t.replace(p,"\\\n"),this.area.value=t.replace(c,"\\n");try{this.form.submit()}catch(f){}this.iframe.attachEvent?this.iframe.onreadystatechange=function(){"complete"==o.iframe.readyState&&n()}:this.iframe.onload=n}}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"./polling":18,"component-inherit":8}],17:[function(t,e,n){(function(n){function r(){}function o(t){if(c.call(this,t),n.location){var e="https:"==location.protocol,r=location.port;r||(r=e?443:80),this.xd=t.hostname!=n.location.hostname||r!=t.port,this.xs=t.secure!=e}else this.extraHeaders=t.extraHeaders}function i(t){this.method=t.method||"GET",this.uri=t.uri,this.xd=!!t.xd,this.xs=!!t.xs,this.async=!1!==t.async,this.data=void 0!=t.data?t.data:null,this.agent=t.agent,this.isBinary=t.isBinary,this.supportsBinary=t.supportsBinary,this.enablesXDR=t.enablesXDR,this.pfx=t.pfx,this.key=t.key,this.passphrase=t.passphrase,this.cert=t.cert,this.ca=t.ca,this.ciphers=t.ciphers,this.rejectUnauthorized=t.rejectUnauthorized,this.extraHeaders=t.extraHeaders,this.create()}function s(){for(var t in i.requests)i.requests.hasOwnProperty(t)&&i.requests[t].abort()}var a=t("xmlhttprequest-ssl"),c=t("./polling"),p=t("component-emitter"),u=t("component-inherit"),f=t("debug")("engine.io-client:polling-xhr");e.exports=o,e.exports.Request=i,u(o,c),o.prototype.supportsBinary=!0,o.prototype.request=function(t){return t=t||{},t.uri=this.uri(),t.xd=this.xd,t.xs=this.xs,t.agent=this.agent||!1,t.supportsBinary=this.supportsBinary,t.enablesXDR=this.enablesXDR,t.pfx=this.pfx,t.key=this.key,t.passphrase=this.passphrase,t.cert=this.cert,t.ca=this.ca,t.ciphers=this.ciphers,t.rejectUnauthorized=this.rejectUnauthorized,t.extraHeaders=this.extraHeaders,new i(t)},o.prototype.doWrite=function(t,e){var n="string"!=typeof t&&void 0!==t,r=this.request({method:"POST",data:t,isBinary:n}),o=this;r.on("success",e),r.on("error",function(t){o.onError("xhr post error",t)}),this.sendXhr=r},o.prototype.doPoll=function(){f("xhr poll");var t=this.request(),e=this;t.on("data",function(t){e.onData(t)}),t.on("error",function(t){e.onError("xhr poll error",t)}),this.pollXhr=t},p(i.prototype),i.prototype.create=function(){var t={agent:this.agent,xdomain:this.xd,xscheme:this.xs,enablesXDR:this.enablesXDR};t.pfx=this.pfx,t.key=this.key,t.passphrase=this.passphrase,t.cert=this.cert,t.ca=this.ca,t.ciphers=this.ciphers,t.rejectUnauthorized=this.rejectUnauthorized;var e=this.xhr=new a(t),r=this;try{f("xhr open %s: %s",this.method,this.uri),e.open(this.method,this.uri,this.async);try{if(this.extraHeaders){e.setDisableHeaderCheck(!0);for(var o in this.extraHeaders)this.extraHeaders.hasOwnProperty(o)&&e.setRequestHeader(o,this.extraHeaders[o])}}catch(s){}if(this.supportsBinary&&(e.responseType="arraybuffer"),"POST"==this.method)try{this.isBinary?e.setRequestHeader("Content-type","application/octet-stream"):e.setRequestHeader("Content-type","text/plain;charset=UTF-8")}catch(s){}"withCredentials"in e&&(e.withCredentials=!0),this.hasXDR()?(e.onload=function(){r.onLoad()},e.onerror=function(){r.onError(e.responseText)}):e.onreadystatechange=function(){4==e.readyState&&(200==e.status||1223==e.status?r.onLoad():setTimeout(function(){r.onError(e.status)},0))},f("xhr data %s",this.data),e.send(this.data)}catch(s){return void setTimeout(function(){r.onError(s)},0)}n.document&&(this.index=i.requestsCount++,i.requests[this.index]=this)},i.prototype.onSuccess=function(){this.emit("success"),this.cleanup()},i.prototype.onData=function(t){this.emit("data",t),this.onSuccess()},i.prototype.onError=function(t){this.emit("error",t),this.cleanup(!0)},i.prototype.cleanup=function(t){if("undefined"!=typeof this.xhr&&null!==this.xhr){if(this.hasXDR()?this.xhr.onload=this.xhr.onerror=r:this.xhr.onreadystatechange=r,t)try{this.xhr.abort()}catch(e){}n.document&&delete i.requests[this.index],this.xhr=null}},i.prototype.onLoad=function(){var t;try{var e;try{e=this.xhr.getResponseHeader("Content-Type").split(";")[0]}catch(n){}if("application/octet-stream"===e)t=this.xhr.response;else if(this.supportsBinary)try{t=String.fromCharCode.apply(null,new Uint8Array(this.xhr.response))}catch(n){for(var r=new Uint8Array(this.xhr.response),o=[],i=0,s=r.length;s>i;i++)o.push(r[i]);t=String.fromCharCode.apply(null,o)}else t=this.xhr.responseText}catch(n){this.onError(n)}null!=t&&this.onData(t)},i.prototype.hasXDR=function(){return"undefined"!=typeof n.XDomainRequest&&!this.xs&&this.enablesXDR},i.prototype.abort=function(){this.cleanup()},n.document&&(i.requestsCount=0,i.requests={},n.attachEvent?n.attachEvent("onunload",s):n.addEventListener&&n.addEventListener("beforeunload",s,!1))}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"./polling":18,"component-emitter":21,"component-inherit":8,debug:9,"xmlhttprequest-ssl":20}],18:[function(t,e,n){function r(t){var e=t&&t.forceBase64;(!u||e)&&(this.supportsBinary=!1),o.call(this,t)}var o=t("../transport"),i=t("parseqs"),s=t("engine.io-parser"),a=t("component-inherit"),c=t("yeast"),p=t("debug")("engine.io-client:polling");e.exports=r;var u=function(){var e=t("xmlhttprequest-ssl"),n=new e({xdomain:!1});return null!=n.responseType}();a(r,o),r.prototype.name="polling",r.prototype.doOpen=function(){this.poll()},r.prototype.pause=function(t){function e(){p("paused"),n.readyState="paused",t()}var n=this;if(this.readyState="pausing",this.polling||!this.writable){var r=0;this.polling&&(p("we are currently polling - waiting to pause"),r++,this.once("pollComplete",function(){p("pre-pause polling complete"),--r||e()})),this.writable||(p("we are currently writing - waiting to pause"),r++,this.once("drain",function(){p("pre-pause writing complete"),--r||e()}))}else e()},r.prototype.poll=function(){p("polling"),this.polling=!0,this.doPoll(),this.emit("poll")},r.prototype.onData=function(t){var e=this;p("polling got data %s",t);var n=function(t,n,r){return"opening"==e.readyState&&e.onOpen(),"close"==t.type?(e.onClose(),!1):void e.onPacket(t)};s.decodePayload(t,this.socket.binaryType,n),"closed"!=this.readyState&&(this.polling=!1,this.emit("pollComplete"),"open"==this.readyState?this.poll():p('ignoring poll - transport state "%s"',this.readyState))},r.prototype.doClose=function(){function t(){p("writing close packet"),e.write([{type:"close"}])}var e=this;"open"==this.readyState?(p("transport open - closing"),t()):(p("transport not open - deferring close"),this.once("open",t))},r.prototype.write=function(t){var e=this;this.writable=!1;var n=function(){e.writable=!0,e.emit("drain")},e=this;s.encodePayload(t,this.supportsBinary,function(t){e.doWrite(t,n)})},r.prototype.uri=function(){var t=this.query||{},e=this.secure?"https":"http",n="";!1!==this.timestampRequests&&(t[this.timestampParam]=c()),this.supportsBinary||t.sid||(t.b64=1),t=i.encode(t),this.port&&("https"==e&&443!=this.port||"http"==e&&80!=this.port)&&(n=":"+this.port),t.length&&(t="?"+t);var r=-1!==this.hostname.indexOf(":");return e+"://"+(r?"["+this.hostname+"]":this.hostname)+n+this.path+t}},{"../transport":14,"component-inherit":8,debug:9,"engine.io-parser":22,parseqs:32,"xmlhttprequest-ssl":20,yeast:45}],19:[function(t,e,n){(function(n){function r(t){var e=t&&t.forceBase64;e&&(this.supportsBinary=!1),this.perMessageDeflate=t.perMessageDeflate,o.call(this,t)}var o=t("../transport"),i=t("engine.io-parser"),s=t("parseqs"),a=t("component-inherit"),c=t("yeast"),p=t("debug")("engine.io-client:websocket"),u=n.WebSocket||n.MozWebSocket,f=u||("undefined"!=typeof window?null:t("ws"));e.exports=r,a(r,o),r.prototype.name="websocket",r.prototype.supportsBinary=!0,r.prototype.doOpen=function(){if(this.check()){var t=this.uri(),e=void 0,n={agent:this.agent,perMessageDeflate:this.perMessageDeflate};n.pfx=this.pfx,n.key=this.key,n.passphrase=this.passphrase,n.cert=this.cert,n.ca=this.ca,n.ciphers=this.ciphers,n.rejectUnauthorized=this.rejectUnauthorized,this.extraHeaders&&(n.headers=this.extraHeaders),this.ws=u?new f(t):new f(t,e,n),void 0===this.ws.binaryType&&(this.supportsBinary=!1),this.ws.supports&&this.ws.supports.binary?(this.supportsBinary=!0,this.ws.binaryType="buffer"):this.ws.binaryType="arraybuffer",this.addEventListeners()}},r.prototype.addEventListeners=function(){var t=this;this.ws.onopen=function(){t.onOpen()},this.ws.onclose=function(){t.onClose()},this.ws.onmessage=function(e){t.onData(e.data)},this.ws.onerror=function(e){t.onError("websocket error",e)}},"undefined"!=typeof navigator&&/iPad|iPhone|iPod/i.test(navigator.userAgent)&&(r.prototype.onData=function(t){var e=this;setTimeout(function(){o.prototype.onData.call(e,t)},0)}),r.prototype.write=function(t){function e(){r.emit("flush"),setTimeout(function(){r.writable=!0,r.emit("drain")},0)}var r=this;this.writable=!1;for(var o=t.length,s=0,a=o;a>s;s++)!function(t){i.encodePacket(t,r.supportsBinary,function(i){if(!u){var s={};if(t.options&&(s.compress=t.options.compress),r.perMessageDeflate){var a="string"==typeof i?n.Buffer.byteLength(i):i.length;a<r.perMessageDeflate.threshold&&(s.compress=!1)}}try{u?r.ws.send(i):r.ws.send(i,s)}catch(c){p("websocket closed before onclose event")}--o||e()})}(t[s])},r.prototype.onClose=function(){o.prototype.onClose.call(this)},r.prototype.doClose=function(){"undefined"!=typeof this.ws&&this.ws.close()},r.prototype.uri=function(){var t=this.query||{},e=this.secure?"wss":"ws",n="";this.port&&("wss"==e&&443!=this.port||"ws"==e&&80!=this.port)&&(n=":"+this.port),this.timestampRequests&&(t[this.timestampParam]=c()),this.supportsBinary||(t.b64=1),t=s.encode(t),t.length&&(t="?"+t);var r=-1!==this.hostname.indexOf(":");return e+"://"+(r?"["+this.hostname+"]":this.hostname)+n+this.path+t},r.prototype.check=function(){return!(!f||"__initialize"in f&&this.name===r.prototype.name)}}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"../transport":14,"component-inherit":8,debug:9,"engine.io-parser":22,parseqs:32,ws:47,yeast:45}],20:[function(t,e,n){var r=t("has-cors");e.exports=function(t){var e=t.xdomain,n=t.xscheme,o=t.enablesXDR;try{if("undefined"!=typeof XMLHttpRequest&&(!e||r))return new XMLHttpRequest}catch(i){}try{if("undefined"!=typeof XDomainRequest&&!n&&o)return new XDomainRequest}catch(i){}if(!e)try{return new ActiveXObject("Microsoft.XMLHTTP")}catch(i){}}},{"has-cors":26}],21:[function(t,e,n){function r(t){return t?o(t):void 0}function o(t){for(var e in r.prototype)t[e]=r.prototype[e];return t}e.exports=r,r.prototype.on=r.prototype.addEventListener=function(t,e){return this._callbacks=this._callbacks||{},(this._callbacks[t]=this._callbacks[t]||[]).push(e),this},r.prototype.once=function(t,e){function n(){r.off(t,n),e.apply(this,arguments)}var r=this;return this._callbacks=this._callbacks||{},n.fn=e,this.on(t,n),this},r.prototype.off=r.prototype.removeListener=r.prototype.removeAllListeners=r.prototype.removeEventListener=function(t,e){
if(this._callbacks=this._callbacks||{},0==arguments.length)return this._callbacks={},this;var n=this._callbacks[t];if(!n)return this;if(1==arguments.length)return delete this._callbacks[t],this;for(var r,o=0;o<n.length;o++)if(r=n[o],r===e||r.fn===e){n.splice(o,1);break}return this},r.prototype.emit=function(t){this._callbacks=this._callbacks||{};var e=[].slice.call(arguments,1),n=this._callbacks[t];if(n){n=n.slice(0);for(var r=0,o=n.length;o>r;++r)n[r].apply(this,e)}return this},r.prototype.listeners=function(t){return this._callbacks=this._callbacks||{},this._callbacks[t]||[]},r.prototype.hasListeners=function(t){return!!this.listeners(t).length}},{}],22:[function(t,e,n){(function(e){function r(t,e){var r="b"+n.packets[t.type]+t.data.data;return e(r)}function o(t,e,r){if(!e)return n.encodeBase64Packet(t,r);var o=t.data,i=new Uint8Array(o),s=new Uint8Array(1+o.byteLength);s[0]=m[t.type];for(var a=0;a<i.length;a++)s[a+1]=i[a];return r(s.buffer)}function i(t,e,r){if(!e)return n.encodeBase64Packet(t,r);var o=new FileReader;return o.onload=function(){t.data=o.result,n.encodePacket(t,e,!0,r)},o.readAsArrayBuffer(t.data)}function s(t,e,r){if(!e)return n.encodeBase64Packet(t,r);if(g)return i(t,e,r);var o=new Uint8Array(1);o[0]=m[t.type];var s=new w([o.buffer,t.data]);return r(s)}function a(t,e,n){for(var r=new Array(t.length),o=h(t.length,n),i=function(t,n,o){e(n,function(e,n){r[t]=n,o(e,r)})},s=0;s<t.length;s++)i(s,t[s],o)}var c=t("./keys"),p=t("has-binary"),u=t("arraybuffer.slice"),f=t("base64-arraybuffer"),h=t("after"),l=t("utf8"),d=navigator.userAgent.match(/Android/i),y=/PhantomJS/i.test(navigator.userAgent),g=d||y;n.protocol=3;var m=n.packets={open:0,close:1,ping:2,pong:3,message:4,upgrade:5,noop:6},b=c(m),v={type:"error",data:"parser error"},w=t("blob");n.encodePacket=function(t,n,i,a){"function"==typeof n&&(a=n,n=!1),"function"==typeof i&&(a=i,i=null);var c=void 0===t.data?void 0:t.data.buffer||t.data;if(e.ArrayBuffer&&c instanceof ArrayBuffer)return o(t,n,a);if(w&&c instanceof e.Blob)return s(t,n,a);if(c&&c.base64)return r(t,a);var p=m[t.type];return void 0!==t.data&&(p+=i?l.encode(String(t.data)):String(t.data)),a(""+p)},n.encodeBase64Packet=function(t,r){var o="b"+n.packets[t.type];if(w&&t.data instanceof e.Blob){var i=new FileReader;return i.onload=function(){var t=i.result.split(",")[1];r(o+t)},i.readAsDataURL(t.data)}var s;try{s=String.fromCharCode.apply(null,new Uint8Array(t.data))}catch(a){for(var c=new Uint8Array(t.data),p=new Array(c.length),u=0;u<c.length;u++)p[u]=c[u];s=String.fromCharCode.apply(null,p)}return o+=e.btoa(s),r(o)},n.decodePacket=function(t,e,r){if("string"==typeof t||void 0===t){if("b"==t.charAt(0))return n.decodeBase64Packet(t.substr(1),e);if(r)try{t=l.decode(t)}catch(o){return v}var i=t.charAt(0);return Number(i)==i&&b[i]?t.length>1?{type:b[i],data:t.substring(1)}:{type:b[i]}:v}var s=new Uint8Array(t),i=s[0],a=u(t,1);return w&&"blob"===e&&(a=new w([a])),{type:b[i],data:a}},n.decodeBase64Packet=function(t,n){var r=b[t.charAt(0)];if(!e.ArrayBuffer)return{type:r,data:{base64:!0,data:t.substr(1)}};var o=f.decode(t.substr(1));return"blob"===n&&w&&(o=new w([o])),{type:r,data:o}},n.encodePayload=function(t,e,r){function o(t){return t.length+":"+t}function i(t,r){n.encodePacket(t,s?e:!1,!0,function(t){r(null,o(t))})}"function"==typeof e&&(r=e,e=null);var s=p(t);return e&&s?w&&!g?n.encodePayloadAsBlob(t,r):n.encodePayloadAsArrayBuffer(t,r):t.length?void a(t,i,function(t,e){return r(e.join(""))}):r("0:")},n.decodePayload=function(t,e,r){if("string"!=typeof t)return n.decodePayloadAsBinary(t,e,r);"function"==typeof e&&(r=e,e=null);var o;if(""==t)return r(v,0,1);for(var i,s,a="",c=0,p=t.length;p>c;c++){var u=t.charAt(c);if(":"!=u)a+=u;else{if(""==a||a!=(i=Number(a)))return r(v,0,1);if(s=t.substr(c+1,i),a!=s.length)return r(v,0,1);if(s.length){if(o=n.decodePacket(s,e,!0),v.type==o.type&&v.data==o.data)return r(v,0,1);var f=r(o,c+i,p);if(!1===f)return}c+=i,a=""}}return""!=a?r(v,0,1):void 0},n.encodePayloadAsArrayBuffer=function(t,e){function r(t,e){n.encodePacket(t,!0,!0,function(t){return e(null,t)})}return t.length?void a(t,r,function(t,n){var r=n.reduce(function(t,e){var n;return n="string"==typeof e?e.length:e.byteLength,t+n.toString().length+n+2},0),o=new Uint8Array(r),i=0;return n.forEach(function(t){var e="string"==typeof t,n=t;if(e){for(var r=new Uint8Array(t.length),s=0;s<t.length;s++)r[s]=t.charCodeAt(s);n=r.buffer}e?o[i++]=0:o[i++]=1;for(var a=n.byteLength.toString(),s=0;s<a.length;s++)o[i++]=parseInt(a[s]);o[i++]=255;for(var r=new Uint8Array(n),s=0;s<r.length;s++)o[i++]=r[s]}),e(o.buffer)}):e(new ArrayBuffer(0))},n.encodePayloadAsBlob=function(t,e){function r(t,e){n.encodePacket(t,!0,!0,function(t){var n=new Uint8Array(1);if(n[0]=1,"string"==typeof t){for(var r=new Uint8Array(t.length),o=0;o<t.length;o++)r[o]=t.charCodeAt(o);t=r.buffer,n[0]=0}for(var i=t instanceof 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n.maybeReconnectOnOpen()});if(!1!==this._timeout){var s=this._timeout;u("connect attempt will timeout after %d",s);var a=setTimeout(function(){u("connect attempt timed out after %d",s),r.destroy(),e.close(),e.emit("error","timeout"),n.emitAll("connect_timeout",s)},s);this.subs.push({destroy:function(){clearTimeout(a)}})}return this.subs.push(r),this.subs.push(i),this},r.prototype.onopen=function(){u("open"),this.cleanup(),this.readyState="open",this.emit("open");var t=this.engine;this.subs.push(c(t,"data",p(this,"ondata"))),this.subs.push(c(t,"ping",p(this,"onping"))),this.subs.push(c(t,"pong",p(this,"onpong"))),this.subs.push(c(t,"error",p(this,"onerror"))),this.subs.push(c(t,"close",p(this,"onclose"))),this.subs.push(c(this.decoder,"decoded",p(this,"ondecoded")))},r.prototype.onping=function(){this.lastPing=new Date,this.emitAll("ping")},r.prototype.onpong=function(){this.emitAll("pong",new Date-this.lastPing)},r.prototype.ondata=function(t){this.decoder.add(t)},r.prototype.ondecoded=function(t){this.emit("packet",t)},r.prototype.onerror=function(t){u("error",t),this.emitAll("error",t)},r.prototype.socket=function(t){function e(){~f(r.connecting,n)||r.connecting.push(n)}var n=this.nsps[t];if(!n){n=new i(this,t),this.nsps[t]=n;var r=this;n.on("connecting",e),n.on("connect",function(){n.id=r.engine.id}),this.autoConnect&&e()}return n},r.prototype.destroy=function(t){var e=f(this.connecting,t);~e&&this.connecting.splice(e,1),this.connecting.length||this.close()},r.prototype.packet=function(t){u("writing packet %j",t);var e=this;e.encoding?e.packetBuffer.push(t):(e.encoding=!0,this.encoder.encode(t,function(n){for(var r=0;r<n.length;r++)e.engine.write(n[r],t.options);e.encoding=!1,e.processPacketQueue()}))},r.prototype.processPacketQueue=function(){if(this.packetBuffer.length>0&&!this.encoding){var t=this.packetBuffer.shift();this.packet(t)}},r.prototype.cleanup=function(){u("cleanup");for(var t;t=this.subs.shift();)t.destroy();this.packetBuffer=[],this.encoding=!1,this.lastPing=null,this.decoder.destroy()},r.prototype.close=r.prototype.disconnect=function(){u("disconnect"),this.skipReconnect=!0,this.reconnecting=!1,"opening"==this.readyState&&this.cleanup(),this.backoff.reset(),this.readyState="closed",this.engine&&this.engine.close()},r.prototype.onclose=function(t){u("onclose"),this.cleanup(),this.backoff.reset(),this.readyState="closed",this.emit("close",t),this._reconnection&&!this.skipReconnect&&this.reconnect()},r.prototype.reconnect=function(){if(this.reconnecting||this.skipReconnect)return this;var t=this;if(this.backoff.attempts>=this._reconnectionAttempts)u("reconnect failed"),this.backoff.reset(),this.emitAll("reconnect_failed"),this.reconnecting=!1;else{var e=this.backoff.duration();u("will wait %dms before reconnect attempt",e),this.reconnecting=!0;var n=setTimeout(function(){t.skipReconnect||(u("attempting reconnect"),t.emitAll("reconnect_attempt",t.backoff.attempts),t.emitAll("reconnecting",t.backoff.attempts),t.skipReconnect||t.open(function(e){e?(u("reconnect attempt error"),t.reconnecting=!1,t.reconnect(),t.emitAll("reconnect_error",e.data)):(u("reconnect success"),t.onreconnect())}))},e);this.subs.push({destroy:function(){clearTimeout(n)}})}},r.prototype.onreconnect=function(){var t=this.backoff.attempts;this.reconnecting=!1,this.backoff.reset(),this.updateSocketIds(),this.emitAll("reconnect",t)}},{"./on":36,"./socket":37,backo2:3,"component-bind":6,"component-emitter":7,debug:9,"engine.io-client":11,indexof:27,"socket.io-parser":40}],36:[function(t,e,n){function r(t,e,n){return t.on(e,n),{destroy:function(){t.removeListener(e,n)}}}e.exports=r},{}],37:[function(t,e,n){function r(t,e){this.io=t,this.nsp=e,this.json=this,this.ids=0,this.acks={},this.receiveBuffer=[],this.sendBuffer=[],this.connected=!1,this.disconnected=!0,this.io.autoConnect&&this.open()}var o=t("socket.io-parser"),i=t("component-emitter"),s=t("to-array"),a=t("./on"),c=t("component-bind"),p=t("debug")("socket.io-client:socket"),u=t("has-binary");e.exports=n=r;var f={connect:1,connect_error:1,connect_timeout:1,connecting:1,disconnect:1,error:1,reconnect:1,reconnect_attempt:1,reconnect_failed:1,reconnect_error:1,reconnecting:1,ping:1,pong:1},h=i.prototype.emit;i(r.prototype),r.prototype.subEvents=function(){if(!this.subs){var t=this.io;this.subs=[a(t,"open",c(this,"onopen")),a(t,"packet",c(this,"onpacket")),a(t,"close",c(this,"onclose"))]}},r.prototype.open=r.prototype.connect=function(){return this.connected?this:(this.subEvents(),this.io.open(),"open"==this.io.readyState&&this.onopen(),this.emit("connecting"),this)},r.prototype.send=function(){var t=s(arguments);return t.unshift("message"),this.emit.apply(this,t),this},r.prototype.emit=function(t){if(f.hasOwnProperty(t))return h.apply(this,arguments),this;var e=s(arguments),n=o.EVENT;u(e)&&(n=o.BINARY_EVENT);var r={type:n,data:e};return r.options={},r.options.compress=!this.flags||!1!==this.flags.compress,"function"==typeof e[e.length-1]&&(p("emitting packet with ack id %d",this.ids),this.acks[this.ids]=e.pop(),r.id=this.ids++),this.connected?this.packet(r):this.sendBuffer.push(r),delete this.flags,this},r.prototype.packet=function(t){t.nsp=this.nsp,this.io.packet(t)},r.prototype.onopen=function(){p("transport is open - connecting"),"/"!=this.nsp&&this.packet({type:o.CONNECT})},r.prototype.onclose=function(t){p("close (%s)",t),this.connected=!1,this.disconnected=!0,delete this.id,this.emit("disconnect",t)},r.prototype.onpacket=function(t){if(t.nsp==this.nsp)switch(t.type){case o.CONNECT:this.onconnect();break;case o.EVENT:this.onevent(t);break;case o.BINARY_EVENT:this.onevent(t);break;case o.ACK:this.onack(t);break;case o.BINARY_ACK:this.onack(t);break;case o.DISCONNECT:this.ondisconnect();break;case o.ERROR:this.emit("error",t.data)}},r.prototype.onevent=function(t){var e=t.data||[];p("emitting event %j",e),null!=t.id&&(p("attaching ack callback to event"),e.push(this.ack(t.id))),this.connected?h.apply(this,e):this.receiveBuffer.push(e)},r.prototype.ack=function(t){var e=this,n=!1;return function(){if(!n){n=!0;var r=s(arguments);p("sending ack %j",r);var i=u(r)?o.BINARY_ACK:o.ACK;e.packet({type:i,id:t,data:r})}}},r.prototype.onack=function(t){var e=this.acks[t.id];"function"==typeof e?(p("calling ack %s with %j",t.id,t.data),e.apply(this,t.data),delete this.acks[t.id]):p("bad ack %s",t.id)},r.prototype.onconnect=function(){this.connected=!0,this.disconnected=!1,this.emit("connect"),this.emitBuffered()},r.prototype.emitBuffered=function(){var t;for(t=0;t<this.receiveBuffer.length;t++)h.apply(this,this.receiveBuffer[t]);for(this.receiveBuffer=[],t=0;t<this.sendBuffer.length;t++)this.packet(this.sendBuffer[t]);this.sendBuffer=[]},r.prototype.ondisconnect=function(){p("server disconnect (%s)",this.nsp),this.destroy(),this.onclose("io server disconnect")},r.prototype.destroy=function(){if(this.subs){for(var t=0;t<this.subs.length;t++)this.subs[t].destroy();this.subs=null}this.io.destroy(this)},r.prototype.close=r.prototype.disconnect=function(){return this.connected&&(p("performing disconnect (%s)",this.nsp),this.packet({type:o.DISCONNECT})),this.destroy(),this.connected&&this.onclose("io client disconnect"),this},r.prototype.compress=function(t){return this.flags=this.flags||{},this.flags.compress=t,this}},{"./on":36,"component-bind":6,"component-emitter":7,debug:9,"has-binary":25,"socket.io-parser":40,"to-array":43}],38:[function(t,e,n){(function(n){function r(t,e){var r=t,e=e||n.location;null==t&&(t=e.protocol+"//"+e.host),"string"==typeof t&&("/"==t.charAt(0)&&(t="/"==t.charAt(1)?e.protocol+t:e.host+t),/^(https?|wss?):\/\//.test(t)||(i("protocol-less url %s",t),t="undefined"!=typeof e?e.protocol+"//"+t:"https://"+t),i("parse %s",t),r=o(t)),r.port||(/^(http|ws)$/.test(r.protocol)?r.port="80":/^(http|ws)s$/.test(r.protocol)&&(r.port="443")),r.path=r.path||"/";var s=-1!==r.host.indexOf(":"),a=s?"["+r.host+"]":r.host;return r.id=r.protocol+"://"+a+":"+r.port,r.href=r.protocol+"://"+a+(e&&e.port==r.port?"":":"+r.port),r}var o=t("parseuri"),i=t("debug")("socket.io-client:url");e.exports=r}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{debug:9,parseuri:33}],39:[function(t,e,n){(function(e){var r=t("isarray"),o=t("./is-buffer");n.deconstructPacket=function(t){function e(t){if(!t)return t;if(o(t)){var i={_placeholder:!0,num:n.length};return n.push(t),i}if(r(t)){for(var s=new Array(t.length),a=0;a<t.length;a++)s[a]=e(t[a]);return s}if("object"==typeof t&&!(t instanceof Date)){var s={};for(var c in t)s[c]=e(t[c]);return s}return t}var n=[],i=t.data,s=t;return s.data=e(i),s.attachments=n.length,{packet:s,buffers:n}},n.reconstructPacket=function(t,e){function n(t){if(t&&t._placeholder){var o=e[t.num];return o}if(r(t)){for(var i=0;i<t.length;i++)t[i]=n(t[i]);return t}if(t&&"object"==typeof t){for(var s in t)t[s]=n(t[s]);return t}return t}return t.data=n(t.data),t.attachments=void 0,t},n.removeBlobs=function(t,n){function i(t,c,p){if(!t)return t;if(e.Blob&&t instanceof Blob||e.File&&t instanceof File){s++;var u=new FileReader;u.onload=function(){p?p[c]=this.result:a=this.result,--s||n(a)},u.readAsArrayBuffer(t)}else if(r(t))for(var f=0;f<t.length;f++)i(t[f],f,t);else if(t&&"object"==typeof t&&!o(t))for(var h in t)i(t[h],h,t)}var s=0,a=t;i(a),s||n(a)}}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"./is-buffer":41,isarray:28}],40:[function(t,e,n){function r(){}function o(t){var e="",r=!1;return e+=t.type,(n.BINARY_EVENT==t.type||n.BINARY_ACK==t.type)&&(e+=t.attachments,e+="-"),t.nsp&&"/"!=t.nsp&&(r=!0,e+=t.nsp),null!=t.id&&(r&&(e+=",",r=!1),e+=t.id),null!=t.data&&(r&&(e+=","),e+=f.stringify(t.data)),u("encoded %j as %s",t,e),e}function i(t,e){function n(t){var n=l.deconstructPacket(t),r=o(n.packet),i=n.buffers;i.unshift(r),e(i)}l.removeBlobs(t,n)}function s(){this.reconstructor=null}function a(t){var e={},r=0;if(e.type=Number(t.charAt(0)),null==n.types[e.type])return p();if(n.BINARY_EVENT==e.type||n.BINARY_ACK==e.type){for(var o="";"-"!=t.charAt(++r)&&(o+=t.charAt(r),r!=t.length););if(o!=Number(o)||"-"!=t.charAt(r))throw new Error("Illegal attachments");e.attachments=Number(o)}if("/"==t.charAt(r+1))for(e.nsp="";++r;){var i=t.charAt(r);if(","==i)break;if(e.nsp+=i,
r==t.length)break}else e.nsp="/";var s=t.charAt(r+1);if(""!==s&&Number(s)==s){for(e.id="";++r;){var i=t.charAt(r);if(null==i||Number(i)!=i){--r;break}if(e.id+=t.charAt(r),r==t.length)break}e.id=Number(e.id)}if(t.charAt(++r))try{e.data=f.parse(t.substr(r))}catch(a){return p()}return u("decoded %s as %j",t,e),e}function c(t){this.reconPack=t,this.buffers=[]}function p(t){return{type:n.ERROR,data:"parser error"}}var u=t("debug")("socket.io-parser"),f=t("json3"),h=(t("isarray"),t("component-emitter")),l=t("./binary"),d=t("./is-buffer");n.protocol=4,n.types=["CONNECT","DISCONNECT","EVENT","BINARY_EVENT","ACK","BINARY_ACK","ERROR"],n.CONNECT=0,n.DISCONNECT=1,n.EVENT=2,n.ACK=3,n.ERROR=4,n.BINARY_EVENT=5,n.BINARY_ACK=6,n.Encoder=r,n.Decoder=s,r.prototype.encode=function(t,e){if(u("encoding packet %j",t),n.BINARY_EVENT==t.type||n.BINARY_ACK==t.type)i(t,e);else{var r=o(t);e([r])}},h(s.prototype),s.prototype.add=function(t){var e;if("string"==typeof t)e=a(t),n.BINARY_EVENT==e.type||n.BINARY_ACK==e.type?(this.reconstructor=new c(e),0===this.reconstructor.reconPack.attachments&&this.emit("decoded",e)):this.emit("decoded",e);else{if(!d(t)&&!t.base64)throw new Error("Unknown type: "+t);if(!this.reconstructor)throw new Error("got binary data when not reconstructing a packet");e=this.reconstructor.takeBinaryData(t),e&&(this.reconstructor=null,this.emit("decoded",e))}},s.prototype.destroy=function(){this.reconstructor&&this.reconstructor.finishedReconstruction()},c.prototype.takeBinaryData=function(t){if(this.buffers.push(t),this.buffers.length==this.reconPack.attachments){var e=l.reconstructPacket(this.reconPack,this.buffers);return this.finishedReconstruction(),e}return null},c.prototype.finishedReconstruction=function(){this.reconPack=null,this.buffers=[]}},{"./binary":39,"./is-buffer":41,"component-emitter":42,debug:9,isarray:28,json3:29}],41:[function(t,e,n){(function(t){function n(e){return t.Buffer&&t.Buffer.isBuffer(e)||t.ArrayBuffer&&e instanceof ArrayBuffer}e.exports=n}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{}],42:[function(t,e,n){arguments[4][21][0].apply(n,arguments)},{dup:21}],43:[function(t,e,n){function r(t,e){var n=[];e=e||0;for(var r=e||0;r<t.length;r++)n[r-e]=t[r];return n}e.exports=r},{}],44:[function(t,e,n){(function(t){!function(r){function o(t){for(var e,n,r=[],o=0,i=t.length;i>o;)e=t.charCodeAt(o++),e>=55296&&56319>=e&&i>o?(n=t.charCodeAt(o++),56320==(64512&n)?r.push(((1023&e)<<10)+(1023&n)+65536):(r.push(e),o--)):r.push(e);return r}function i(t){for(var e,n=t.length,r=-1,o="";++r<n;)e=t[r],e>65535&&(e-=65536,o+=v(e>>>10&1023|55296),e=56320|1023&e),o+=v(e);return o}function s(t){if(t>=55296&&57343>=t)throw Error("Lone surrogate U+"+t.toString(16).toUpperCase()+" is not a scalar value")}function a(t,e){return v(t>>e&63|128)}function c(t){if(0==(4294967168&t))return v(t);var e="";return 0==(4294965248&t)?e=v(t>>6&31|192):0==(4294901760&t)?(s(t),e=v(t>>12&15|224),e+=a(t,6)):0==(4292870144&t)&&(e=v(t>>18&7|240),e+=a(t,12),e+=a(t,6)),e+=v(63&t|128)}function p(t){for(var e,n=o(t),r=n.length,i=-1,s="";++i<r;)e=n[i],s+=c(e);return s}function u(){if(b>=m)throw Error("Invalid byte index");var t=255&g[b];if(b++,128==(192&t))return 63&t;throw Error("Invalid continuation byte")}function f(){var t,e,n,r,o;if(b>m)throw Error("Invalid byte index");if(b==m)return!1;if(t=255&g[b],b++,0==(128&t))return t;if(192==(224&t)){var e=u();if(o=(31&t)<<6|e,o>=128)return o;throw Error("Invalid continuation byte")}if(224==(240&t)){if(e=u(),n=u(),o=(15&t)<<12|e<<6|n,o>=2048)return s(o),o;throw Error("Invalid continuation byte")}if(240==(248&t)&&(e=u(),n=u(),r=u(),o=(15&t)<<18|e<<12|n<<6|r,o>=65536&&1114111>=o))return o;throw Error("Invalid UTF-8 detected")}function h(t){g=o(t),m=g.length,b=0;for(var e,n=[];(e=f())!==!1;)n.push(e);return i(n)}var l="object"==typeof n&&n,d="object"==typeof e&&e&&e.exports==l&&e,y="object"==typeof t&&t;(y.global===y||y.window===y)&&(r=y);var g,m,b,v=String.fromCharCode,w={version:"2.0.0",encode:p,decode:h};if("function"==typeof define&&"object"==typeof define.amd&&define.amd)define(function(){return w});else if(l&&!l.nodeType)if(d)d.exports=w;else{var k={},x=k.hasOwnProperty;for(var A in w)x.call(w,A)&&(l[A]=w[A])}else r.utf8=w}(this)}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{}],45:[function(t,e,n){"use strict";function r(t){var e="";do e=a[t%c]+e,t=Math.floor(t/c);while(t>0);return e}function o(t){var e=0;for(f=0;f<t.length;f++)e=e*c+p[t.charAt(f)];return e}function i(){var t=r(+new Date);return t!==s?(u=0,s=t):t+"."+r(u++)}for(var s,a="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_".split(""),c=64,p={},u=0,f=0;c>f;f++)p[a[f]]=f;i.encode=r,i.decode=o,e.exports=i},{}],46:[function(t,e,n){(function(n){"use strict";function r(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}function o(t,e){if(!t)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return!e||"object"!=typeof e&&"function"!=typeof e?t:e}function i(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function, not "+typeof e);t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,enumerable:!1,writable:!0,configurable:!0}}),e&&(Object.setPrototypeOf?Object.setPrototypeOf(t,e):t.__proto__=e)}function s(t){var e=function(t){function e(t,n){function i(){a.emit("joinRoom",n.room),c.userJoined("server","master"),a.on("yjsEvent",function(t){null!=t.type&&("sync done"===t.type&&c.setUserId(a.id),t.room===n.room&&c.receiveMessage("server",t))}),a.on("disconnect",function(t){c.userLeft("server")})}if(r(this,e),void 0===n)throw new Error("Options must not be undefined!");if(null==n.room)throw new Error("You must define a room name!");n.role="slave";var s=o(this,Object.getPrototypeOf(e).call(this,t,n));s.options=n,n.url=n.url||"https://yjs.dbis.rwth-aachen.de:5074";var a=u(n.url);s.socket=a;var c=s;return a.connected?i():a.on("connect",i),s}return i(e,t),a(e,[{key:"disconnect",value:function(){this.socket.disconnect(),c(Object.getPrototypeOf(e.prototype),"disconnect",this).call(this)}},{key:"reconnect",value:function(){this.socket.connect(),this.socket.emit("joinRoom",this.options.room),this.userJoined("server","master"),c(Object.getPrototypeOf(e.prototype),"reconnect",this).call(this)}},{key:"send",value:function(t,e){e.room=this.options.room,this.socket.emit("yjsEvent",e)}},{key:"broadcast",value:function(t){t.room=this.options.room,this.socket.emit("yjsEvent",t)}},{key:"isDisconnected",value:function(){return this.socket.disconnected}}]),e}(t.AbstractConnector);t.extend("websockets-client",e)}var a=function(){function t(t,e){for(var n=0;n<e.length;n++){var r=e[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(t,r.key,r)}}return function(e,n,r){return n&&t(e.prototype,n),r&&t(e,r),e}}(),c=function f(t,e,n){null===t&&(t=Function.prototype);var r=Object.getOwnPropertyDescriptor(t,e);if(void 0===r){var o=Object.getPrototypeOf(t);return null===o?void 0:f(o,e,n)}if("value"in r)return r.value;var i=r.get;if(void 0!==i)return i.call(n)},p=n.define;n.define=null;var u=t("socket.io-client");n.define=p,e.exports=s,"undefined"!=typeof Y&&s(Y)}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"socket.io-client":34}],47:[function(t,e,n){},{}]},{},[46]);
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