centrifuge
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JavaScript client SDK for bidirectional communication with Centrifugo and Centrifuge-based server from browser, NodeJS and React Native
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JavaScript
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ne.default{constructor(e,t,n){super();this._resubscribeTimeout=null;this._refreshTimeout=null;this.channel=t,this.state="unsubscribed",this._centrifuge=e,this._token="",this._getToken=null,this._data=null,this._getData=null,this._recover=!1,this._offset=null,this._epoch=null,this._recoverable=!1,this._positioned=!1,this._joinLeave=!1,this._minResubscribeDelay=500,this._maxResubscribeDelay=2e4,this._resubscribeTimeout=null,this._resubscribeAttempts=0,this._promises={},this._promiseId=0,this._inflight=!1,this._refreshTimeout=null,this._delta="",this._delta_negotiated=!1,this._prevValue=null,this._unsubPromise=Promise.resolve(),this._setOptions(n),this._centrifuge._debugEnabled?(this.on("state",i=>{this._debug("subscription state",t,i.oldState,"->",i.newState)}),this.on("error",i=>{this._debug("subscription error",t,i)})):this.on("error",function(){Function.prototype()})}ready(e){return 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this._isSubscribed()?Promise.resolve():this._isUnsubscribed()?Promise.reject({code:7,message:this.state}):new Promise((e,t)=>{let n=setTimeout(function(){t({code:1,message:"timeout"})},this._centrifuge._config.timeout);this._promises[this._nextPromiseId()]={timeout:n,resolve:e,reject:t}})}_nextPromiseId(){return++this._promiseId}_needRecover(){return this._recover===!0}_isUnsubscribed(){return this.state==="unsubscribed"}_isSubscribing(){return this.state==="subscribing"}_isSubscribed(){return this.state==="subscribed"}_setState(e){if(this.state!==e){let t=this.state;return this.state=e,this.emit("state",{newState:e,oldState:t,channel:this.channel}),!0}return!1}_usesToken(){return this._token!==""||this._getToken!==null}_clearSubscribingState(){this._resubscribeAttempts=0,this._clearResubscribeTimeout()}_clearSubscribedState(){this._clearRefreshTimeout()}_setSubscribed(e){if(!this._isSubscribing())return;this._clearSubscribingState(),e.recoverable&&(this._recover=!0,this._offset=e.offset||0,this._epoch=e.epoch||""),e.delta?this._delta_negotiated=!0:this._delta_negotiated=!1,this._setState("subscribed");let t=this._centrifuge._getSubscribeContext(this.channel,e);this.emit("subscribed",t),this._resolvePromises();let n=e.publications;if(n&&n.length>0)for(let i in n)n.hasOwnProperty(i)&&this._handlePublication(n[i]);e.expires===!0&&(this._refreshTimeout=setTimeout(()=>this._refresh(),T(e.ttl)))}async _setSubscribing(e,t){this._isSubscribing()||(this._isSubscribed()&&this._clearSubscribedState(),this._setState("subscribing")&&this.emit("subscribing",{channel:this.channel,code:e,reason:t}),this._centrifuge._transport&&this._centrifuge._transport.emulation()&&await this._unsubPromise,this._isSubscribing()&&this._subscribe())}_subscribe(){return this._debug("subscribing on",this.channel),this._isTransportOpen()?this._inflight?null:(this._inflight=!0,this._canSubscribeWithoutGettingToken()?this._subscribeWithoutToken():(this._getSubscriptionToken().then(e=>this._handleTokenResponse(e)).catch(e=>this._handleTokenError(e)),null)):(this._debug("delay subscribe on",this.channel,"till connected"),null)}_isTransportOpen(){return this._centrifuge._transportIsOpen}_canSubscribeWithoutGettingToken(){return!this._usesToken()||!!this._token}_subscribeWithoutToken(){return this._getData?(this._getDataAndSubscribe(this._token),null):this._sendSubscribe(this._token)}_getDataAndSubscribe(e){if(!this._getData){this._inflight=!1;return}this._getData({channel:this.channel}).then(t=>{if(!this._isSubscribing()){this._inflight=!1;return}this._data=t,this._sendSubscribe(e)}).catch(t=>this._handleGetDataError(t))}_handleGetDataError(e){if(!this._isSubscribing()){this._inflight=!1;return}if(e instanceof _){this._inflight=!1,this._failUnauthorized();return}this.emit("error",{type:"subscribeData",channel:this.channel,error:{code:12,message:e?.toString()||""}}),this._inflight=!1,this._scheduleResubscribe()}_handleTokenResponse(e){if(!this._isSubscribing()){this._inflight=!1;return}if(!e){this._inflight=!1,this._failUnauthorized();return}this._token=e,this._getData?this._getDataAndSubscribe(e):this._sendSubscribe(e)}_handleTokenError(e){if(!this._isSubscribing()){this._inflight=!1;return}if(e instanceof _){this._inflight=!1,this._failUnauthorized();return}this.emit("error",{type:"subscribeToken",channel:this.channel,error:{code:8,message:e?.toString()||""}}),this._inflight=!1,this._scheduleResubscribe()}_sendSubscribe(e){if(!this._isTransportOpen())return this._inflight=!1,null;let t=this._buildSubscribeCommand(e);return this._centrifuge._call(t).then(n=>{this._inflight=!1;let i=n.reply.subscribe;this._handleSubscribeResponse(i),n.next&&n.next()},n=>{this._inflight=!1,this._handleSubscribeError(n.error),n.next&&n.next()}),t}_buildSubscribeCommand(e){let t={channel:this.channel};if(e&&(t.token=e),this._data&&(t.data=this._data),this._positioned&&(t.positioned=!0),this._recoverable&&(t.recoverable=!0),this._joinLeave&&(t.join_leave=!0),this._needRecover()){t.recover=!0;let n=this._getOffset();n&&(t.offset=n);let i=this._getEpoch();i&&(t.epoch=i)}return this._delta&&(t.delta=this._delta),{subscribe:t}}_debug(...e){this._centrifuge._debug(...e)}_handleSubscribeError(e){if(this._isSubscribing()){if(e.code===1){this._centrifuge._disconnect(3,"subscribe timeout",!0);return}this._subscribeError(e)}}_handleSubscribeResponse(e){this._isSubscribing()&&this._setSubscribed(e)}_setUnsubscribed(e,t,n){if(this._isUnsubscribed())return Promise.resolve();let i=Promise.resolve();return this._isSubscribed()?(n&&(i=this._centrifuge._unsubscribe(this)),this._clearSubscribedState()):this._isSubscribing()&&(this._inflight&&n&&(i=this._centrifuge._unsubscribe(this)),this._clearSubscribingState()),this._inflight=!1,this._setState("unsubscribed")&&this.emit("unsubscribed",{channel:this.channel,code:e,reason:t}),this._rejectPromises({code:7,message:this.state}),i}_handlePublication(e){if(this._delta&&this._delta_negotiated){let{newData:n,newPrevValue:i}=this._centrifuge._codec.applyDeltaIfNeeded(e,this._prevValue);e.data=n,this._prevValue=i}let t=this._centrifuge._getPublicationContext(this.channel,e);this.emit("publication",t),e.offset&&(this._offset=e.offset)}_handleJoin(e){let t=this._centrifuge._getJoinLeaveContext(e.info);this.emit("join",{channel:this.channel,info:t})}_handleLeave(e){let t=this._centrifuge._getJoinLeaveContext(e.info);this.emit("leave",{channel:this.channel,info:t})}_resolvePromises(){for(let e in this._promises)this._promises.hasOwnProperty(e)&&(this._promises[e].timeout&&clearTimeout(this._promises[e].timeout),this._promises[e].resolve(),delete this._promises[e])}_rejectPromises(e){for(let t in this._promises)this._promises.hasOwnProperty(t)&&(this._promises[t].timeout&&clearTimeout(this._promises[t].timeout),this._promises[t].reject(e),delete this._promises[t])}_scheduleResubscribe(){if(!this._isSubscribing()){this._debug("not in subscribing state, skip resubscribe scheduling",this.channel);return}let e=this,t=this._getResubscribeDelay();this._resubscribeTimeout=setTimeout(function(){e._isSubscribing()&&e._subscribe()},t),this._debug("resubscribe scheduled after "+t,this.channel)}_subscribeError(e){if(this._isSubscribing())if(e.code<100||e.code===109||e.temporary===!0){e.code===109&&(this._token="");let t={channel:this.channel,type:"subscribe",error:e};this._centrifuge.state==="connected"&&this.emit("error",t),this._scheduleResubscribe()}else this._setUnsubscribed(e.code,e.message,!1)}_getResubscribeDelay(){let e=S(this._resubscribeAttempts,this._minResubscribeDelay,this._maxResubscribeDelay);return this._resubscribeAttempts++,e}_setOptions(e){if(e&&(e.since&&(this._offset=e.since.offset,this._epoch=e.since.epoch,this._recover=!0),e.data&&(this._data=e.data),e.getData&&(this._getData=e.getData),e.minResubscribeDelay!==void 0&&(this._minResubscribeDelay=e.minResubscribeDelay),e.maxResubscribeDelay!==void 0&&(this._maxResubscribeDelay=e.maxResubscribeDelay),e.token&&(this._token=e.token),e.getToken&&(this._getToken=e.getToken),e.positioned===!0&&(this._positioned=!0),e.recoverable===!0&&(this._recoverable=!0),e.joinLeave===!0&&(this._joinLeave=!0),e.delta)){if(e.delta!=="fossil")throw new Error("unsupported delta format");this._delta=e.delta}}_getOffset(){let e=this._offset;return e!==null?e:0}_getEpoch(){let e=this._epoch;return e!==null?e:""}_clearRefreshTimeout(){this._refreshTimeout!==null&&(clearTimeout(this._refreshTimeout),this._refreshTimeout=null)}_clearResubscribeTimeout(){this._resubscribeTimeout!==null&&(clearTimeout(this._resubscribeTimeout),this._resubscribeTimeout=null)}_getSubscriptionToken(){this._debug("get subscription token for channel",this.channel);let e={channel:this.channel},t=this._getToken;if(t===null)throw this.emit("error",{type:"configuration",channel:this.channel,error:{code:12,message:"provide a function to get channel subscription token"}}),new _("");return t(e)}_refresh(){this._clearRefreshTimeout();let e=this;this._getSubscriptionToken().then(function(t){if(!e._isSubscribed())return;if(!t){e._failUnauthorized();return}e._token=t;let i={sub_refresh:{channel:e.channel,token:t}};e._centrifuge._call(i).then(o=>{let a=o.reply.sub_refresh;e._refreshResponse(a),o.next&&o.next()},o=>{e._refreshError(o.error),o.next&&o.next()})}).catch(function(t){if(t instanceof _){e._failUnauthorized();return}e.emit("error",{type:"refreshToken",channel:e.channel,error:{code:9,message:t!==void 0?t.toString():""}}),e._refreshTimeout=setTimeout(()=>e._refresh(),e._getRefreshRetryDelay())})}_refreshResponse(e){this._isSubscribed()&&(this._debug("subscription token refreshed, channel",this.channel),this._clearRefreshTimeout(),e.expires===!0&&(this._refreshTimeout=setTimeout(()=>this._refresh(),T(e.ttl))))}_refreshError(e){this._isSubscribed()&&(e.code<100||e.temporary===!0?(this.emit("error",{type:"refresh",channel:this.channel,error:e}),this._refreshTimeout=setTimeout(()=>this._refresh(),this._getRefreshRetryDelay())):this._setUnsubscribed(e.code,e.message,!0))}_getRefreshRetryDelay(){return S(0,1e4,2e4)}_failUnauthorized(){this._setUnsubscribed(1,"unauthorized",!0)}};var L=class{constructor(s,e){this.endpoint=s,this.options=e,this._transport=null}name(){return"sockjs"}subName(){return"sockjs-"+this._transport.transport}emulation(){return!1}supported(){return this.options.sockjs!==null}initialize(s,e){this._transport=new this.options.sockjs(this.endpoint,null,this.options.sockjsOptions),this._transport.onopen=()=>{e.onOpen()},this._transport.onerror=t=>{e.onError(t)},this._transport.onclose=t=>{e.onClose(t)},this._transport.onmessage=t=>{e.onMessage(t.data)}}close(){this._transport.close()}send(s){this._transport.send(s)}};var x=class{constructor(s,e){this.endpoint=s,this.options=e,this._transport=null}name(){return"websocket"}subName(){return"websocket"}emulation(){return!1}supported(){return this.options.websocket!==void 0&&this.options.websocket!==null}initialize(s,e){let t="";s==="protobuf"&&(t="centrifuge-protobuf"),t!==""?this._transport=new this.options.websocket(this.endpoint,t):this._transport=new this.options.websocket(this.endpoint),s==="protobuf"&&(this._transport.binaryType="arraybuffer"),this._transport.onopen=()=>{e.onOpen()},this._transport.onerror=n=>{e.onError(n)},this._transport.onclose=n=>{e.onClose(n)},this._transport.onmessage=n=>{e.onMessage(n.data)}}close(){this._transport.close()}send(s){this._transport.send(s)}};var D=class{constructor(s,e){this.endpoint=s,this.options=e,this._abortController=null,this._utf8decoder=new TextDecoder,this._protocol="json"}name(){return"http_stream"}subName(){return"http_stream"}emulation(){return!0}_handleErrors(s){if(!s.ok)throw new Error(s.status);return s}_fetchEventTarget(s,e,t){let n=new EventTarget,i=s.options.fetch;return i(e,t).then(s._handleErrors).then(o=>{n.dispatchEvent(new Event("open"));let a="",c=0,u=new Uint8Array,b=o.body.getReader();return new s.options.readableStream({start(v){function E(){return b.read().then(({done:m,value:l})=>{if(m){n.dispatchEvent(new Event("close")),v.close();return}try{if(s._protocol==="json")for(a+=s._utf8decoder.decode(l);c<a.length;)if(a[c]===`
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`).map(e=>JSON.parse(e))}applyDeltaIfNeeded(s,e){let t,n;if(s.delta){let i=ie(e,new TextEncoder().encode(s.data));t=JSON.parse(new TextDecoder().decode(i)),n=i}else t=JSON.parse(s.data),n=new TextEncoder().encode(s.data);return{newData:t,newPrevValue:n}}};var se=J(z()),we={headers:{},token:"",getToken:null,data:null,getData:null,debug:!1,name:"js",version:"",fetch:null,readableStream:null,websocket:null,eventsource:null,sockjs:null,sockjsOptions:{},emulationEndpoint:"/emulation",minReconnectDelay:500,maxReconnectDelay:2e4,timeout:5e3,maxServerPingDelay:1e4,networkEventTarget:null},_=class extends Error{constructor(s){super(s),this.name=this.constructor.name}},g=class extends se.default{constructor(e,t){super();this._reconnectTimeout=null;this._refreshTimeout=null;this._serverPingTimeout=null;this.state="disconnected",this._transportIsOpen=!1,this._endpoint=e,this._emulation=!1,this._transports=[],this._currentTransportIndex=0,this._triedAllTransports=!1,this._transportWasOpen=!1,this._transport=null,this._transportId=0,this._deviceWentOffline=!1,this._transportClosed=!0,this._codec=new w,this._reconnecting=!1,this._reconnectTimeout=null,this._reconnectAttempts=0,this._client=null,this._session="",this._node="",this._subs={},this._serverSubs={},this._commandId=0,this._commands=[],this._batching=!1,this._refreshRequired=!1,this._refreshTimeout=null,this._callbacks={},this._token="",this._data=null,this._dispatchPromise=Promise.resolve(),this._serverPing=0,this._serverPingTimeout=null,this._sendPong=!1,this._promises={},this._promiseId=0,this._debugEnabled=!1,this._networkEventsSet=!1,this._config={...we,...t},this._configure(),this._debugEnabled?(this.on("state",n=>{this._debug("client state",n.oldState,"->",n.newState)}),this.on("error",n=>{this._debug("client error",n)})):this.on("error",function(){Function.prototype()})}newSubscription(e,t){if(this.getSubscription(e)!==null)throw new Error("Subscription to the channel "+e+" already exists");let n=new O(this,e,t);return this._subs[e]=n,n}getSubscription(e){return this._getSub(e)}removeSubscription(e){e&&(e.state!=="unsubscribed"&&e.unsubscribe(),this._removeSubscription(e))}subscriptions(){return this._subs}ready(e){return this.state==="disconnected"?Promise.reject({code:3,message:"client disconnected"}):this.state==="connected"?Promise.resolve():new Promise((t,n)=>{let i={resolve:t,reject:n};e&&(i.timeout=setTimeout(function(){n({code:1,message:"timeout"})},e)),this._promises[this._nextPromiseId()]=i})}connect(){if(this._isConnected()){this._debug("connect called when already connected");return}if(this._isConnecting()){this._debug("connect called when already connecting");return}this._debug("connect called"),this._reconnectAttempts=0,this._startConnecting()}disconnect(){this._disconnect(0,"disconnect called",!1)}setToken(e){this._token=e}setHeaders(e){this._config.headers=e}send(e){let t={send:{data:e}},n=this;return this._methodCall().then(function(){return n._transportSendCommands([t])?Promise.resolve():Promise.reject(n._createErrorObject(10,"transport write error"))})}rpc(e,t){let n={rpc:{method:e,data:t}},i=this;return this._methodCall().then(function(){return i._callPromise(n,function(o){return{data:o.rpc.data}})})}publish(e,t){let n={publish:{channel:e,data:t}},i=this;return this._methodCall().then(function(){return i._callPromise(n,function(){return{}})})}history(e,t){let n={history:this._getHistoryRequest(e,t)},i=this;return this._methodCall().then(function(){return i._callPromise(n,function(o){let a=o.history,c=[];if(a.publications)for(let u=0;u<a.publications.length;u++)c.push(i._getPublicationContext(e,a.publications[u]));return{publications:c,epoch:a.epoch||"",offset:a.offset||0}})})}presence(e){let t={presence:{channel:e}},n=this;return this._methodCall().then(function(){return n._callPromise(t,function(i){let o=i.presence.presence;for(let a in o)if(o.hasOwnProperty(a)){let c=o[a].conn_info,u=o[a].chan_info;c&&(o[a].connInfo=c),u&&(o[a].chanInfo=u)}return{clients:o}})})}presenceStats(e){let t={presence_stats:{channel:e}},n=this;return this._methodCall().then(function(){return n._callPromise(t,function(i){let o=i.presence_stats;return{numUsers:o.num_users,numClients:o.num_clients}})})}startBatching(){this._batching=!0}stopBatching(){let e=this;Promise.resolve().then(function(){Promise.resolve().then(function(){e._batching=!1,e._flush()})})}_debug(...e){this._debugEnabled&&ee("debug",e)}_formatOverride(){}_configure(){if(!("Promise"in globalThis))throw new Error("Promise polyfill required");if(!this._endpoint)throw new Error("endpoint configuration required");if(this._config.token!==null&&(this._token=this._config.token),this._config.data!==null&&(this._data=this._config.data),this._codec=new w,this._formatOverride(),(this._config.debug===!0||typeof localStorage<"u"&&localStorage.getItem("centrifuge.debug"))&&(this._debugEnabled=!0),this._debug("config",this._config),typeof this._endpoint!="string")if(typeof this._endpoint=="object"&&this._endpoint instanceof Array){this._transports=this._endpoint,this._emulation=!0;for(let e in this._transports)if(this._transports.hasOwnProperty(e)){let t=this._transports[e];if(!t.endpoint||!t.transport)throw new Error("malformed transport configuration");let n=t.transport;if(["websocket","http_stream","sse","sockjs","webtransport"].indexOf(n)<0)throw new Error("unsupported transport name: "+n)}}else throw new Error("unsupported url configuration type: only string or array of objects are supported")}_setState(e){if(this.state!==e){this._reconnecting=!1;let t=this.state;return this.state=e,this.emit("state",{newState:e,oldState:t}),!0}return!1}_isDisconnected(){return this.state==="disconnected"}_isConnecting(){return this.state==="connecting"}_isConnected(){return this.state==="connected"}_nextCommandId(){return++this._commandId}_setNetworkEvents(){if(this._networkEventsSet)return;let e=null;this._config.networkEventTarget!==null?e=this._config.networkEventTarget:typeof globalThis.addEventListener<"u"&&(e=globalThis),e&&(e.addEventListener("offline",()=>{this._debug("offline event triggered"),(this.state==="connected"||this.state==="connecting")&&(this._disconnect(1,"transport closed",!0),this._deviceWentOffline=!0)}),e.addEventListener("online",()=>{this._debug("online event triggered"),this.state==="connecting"&&(this._deviceWentOffline&&!this._transportClosed&&(this._deviceWentOffline=!1,this._transportClosed=!0),this._clearReconnectTimeout(),this._startReconnecting())}),this._networkEventsSet=!0)}_getReconnectDelay(){let e=S(this._reconnectAttempts,this._config.minReconnectDelay,this._config.maxReconnectDelay);return this._reconnectAttempts+=1,e}_clearOutgoingRequests(){for(let e in this._callbacks)if(this._callbacks.hasOwnProperty(e)){let t=this._callbacks[e];clearTimeout(t.timeout);let n=t.errback;if(!n)continue;n({error:this._createErrorObject(11,"connection closed")})}this._callbacks={}}_clearConnectedState(){this._client=null,this._clearServerPingTimeout(),this._clearRefreshTimeout();for(let e in this._subs){if(!this._subs.hasOwnProperty(e))continue;let t=this._subs[e];t.state==="subscribed"&&t._setSubscribing(1,"transport closed")}for(let e in this._serverSubs)this._serverSubs.hasOwnProperty(e)&&this.emit("subscribing",{channel:e})}_handleWriteError(e){for(let t of e){let n=t.id;if(!(n in this._callbacks))continue;let i=this._callbacks[n];clearTimeout(this._callbacks[n].timeout),delete this._callbacks[n];let o=i.errback;o({error:this._createErrorObject(10,"transport write error")})}}_transportSendCommands(e){if(!e.length)return!0;if(!this._transport)return!1;try{this._transport.send(this._codec.encodeCommands(e),this._session,this._node)}catch(t){return this._debug("error writing commands",t),this._handleWriteError(e),!1}return!0}_initializeTransport(){let e;this._config.websocket!==null?e=this._config.websocket:typeof globalThis.WebSocket!="function"&&typeof globalThis.WebSocket!="object"||(e=globalThis.WebSocket);let t=null;this._config.sockjs!==null?t=this._config.sockjs:typeof globalThis.SockJS<"u"&&(t=globalThis.SockJS);let n=null;this._config.eventsource!==null?n=this._config.eventsource:typeof globalThis.EventSource<"u"&&(n=globalThis.EventSource);let i=null;this._config.fetch!==null?i=this._config.fetch:typeof globalThis.fetch<"u"&&(i=globalThis.fetch);let o=null;if(this._config.readableStream!==null?o=this._config.readableStream:typeof globalThis.ReadableStream<"u"&&(o=globalThis.ReadableStream),this._emulation){this._currentTransportIndex>=this._transports.length&&(this._triedAllTransports=!0,this._currentTransportIndex=0);let l=0;for(;;){if(l>=this._transports.length)throw new Error("no supported transport found");let p=this._transports[this._currentTransportIndex],d=p.transport,f=p.endpoint;if(d==="websocket"){if(this._debug("trying websocket transport"),this._transport=new x(f,{websocket:e}),!this._transport.supported()){this._debug("websocket transport not available"),this._currentTransportIndex++,l++;continue}}else if(d==="webtransport"){if(this._debug("trying webtransport transport"),this._transport=new j(f,{webtransport:globalThis.WebTransport,decoder:this._codec,encoder:this._codec}),!this._transport.supported()){this._debug("webtransport transport not available"),this._currentTransportIndex++,l++;continue}}else if(d==="http_stream"){if(this._debug("trying http_stream transport"),this._transport=new D(f,{fetch:i,readableStream:o,emulationEndpoint:this._config.emulationEndpoint,decoder:this._codec,encoder:this._codec}),!this._transport.supported()){this._debug("http_stream transport not available"),this._currentTransportIndex++,l++;continue}}else if(d==="sse"){if(this._debug("trying sse transport"),this._transport=new I(f,{eventsource:n,fetch:i,emulationEndpoint:this._config.emulationEndpoint}),!this._transport.supported()){this._debug("sse transport not available"),this._currentTransportIndex++,l++;continue}}else if(d==="sockjs"){if(this._debug("trying sockjs"),this._transport=new L(f,{sockjs:t,sockjsOptions:this._config.sockjsOptions}),!this._transport.supported()){this._debug("sockjs transport not available"),this._currentTransportIndex++,l++;continue}}else throw new Error("unknown transport "+d);break}}else{if($(this._endpoint,"http"))throw new Error("Provide explicit transport endpoints configuration in case of using HTTP (i.e. using array of TransportEndpoint instead of a single string), or use ws(s):// scheme in an endpoint if you aimed using WebSocket transport");if(this._debug("client will use websocket"),this._transport=new x(this._endpoint,{websocket:e}),!this._transport.supported())throw new Error("WebSocket constructor not found, make sure it is available globally or passed as a dependency in Centrifuge options")}let a=this,c=this._transport,u=this._nextTransportId();a._debug("id of transport",u);let b=!1,v=[];if(this._transport.emulation()){let l=a._sendConnect(!0);v.push(l)}this._setNetworkEvents();let E=this._codec.encodeCommands(v);this._transportClosed=!1;let m;m=setTimeout(function(){c.close()},this._config.timeout),this._transport.initialize(this._codec.name(),{onOpen:function(){if(m&&(clearTimeout(m),m=null),a._transportId!=u){a._debug("open callback from non-actual transport"),c.close();return}b=!0,a._debug(c.subName(),"transport open"),!c.emulation()&&(a._transportIsOpen=!0,a._transportWasOpen=!0,a.startBatching(),a._sendConnect(!1),a._sendSubscribeCommands(),a.stopBatching(),a.emit("__centrifuge_debug:connect_frame_sent",{}))},onError:function(l){if(a._transportId!=u){a._debug("error callback from non-actual transport");return}a._debug("transport level error",l)},onClose:function(l){if(m&&(clearTimeout(m),m=null),a._transportId!=u){a._debug("close callback from non-actual transport");return}a._debug(c.subName(),"transport closed"),a._transportClosed=!0,a._transportIsOpen=!1;let p="connection closed",d=!0,f=0;if(l&&"code"in l&&l.code&&(f=l.code),l&&l.reason)try{let A=JSON.parse(l.reason);p=A.reason,d=A.reconnect}catch{p=l.reason,(f>=3500&&f<4e3||f>=4500&&f<5e3)&&(d=!1)}f<3e3?(f===1009?(f=3,p="message size limit exceeded",d=!1):(f=1,p="transport closed"),a._emulation&&!a._transportWasOpen&&(a._currentTransportIndex++,a._currentTransportIndex>=a._transports.length&&(a._triedAllTransports=!0,a._currentTransportIndex=0))):a._transportWasOpen=!0,a._isConnecting()&&!b&&a.emit("error",{type:"transport",error:{code:2,message:"transport closed"},transport:c.name()}),a._reconnecting=!1,a._disconnect(f,p,d)},onMessage:function(l){a._dataReceived(l)}},E),a.emit("__centrifuge_debug:transport_initialized",{})}_sendConnect(e){let t=this._constructConnectCommand(),n=this;return this._call(t,e).then(i=>{let o=i.reply.connect;n._connectResponse(o),i.next&&i.next()},i=>{n._connectError(i.error),i.next&&i.next()}),t}_startReconnecting(){if(this._debug("start reconnecting"),!this._isConnecting()){this._debug("stop reconnecting: client not in connecting state");return}if(this._reconnecting){this._debug("reconnect already in progress, return from reconnect routine");return}if(this._transportClosed===!1){this._debug("waiting for transport close");return}this._reconnecting=!0;let e=this._token==="";if(!(this._refreshRequired||e&&this._config.getToken!==null)){this._config.getData?this._config.getData().then(i=>{this._isConnecting()&&(this._data=i,this._initializeTransport())}).catch(i=>this._handleGetDataError(i)):this._initializeTransport();return}let n=this;this._getToken().then(function(i){if(n._isConnecting()){if(i==null||i==null){n._failUnauthorized();return}n._token=i,n._debug("connection token refreshed"),n._config.getData?n._config.getData().then(function(o){n._isConnecting()&&(n._data=o,n._initializeTransport())}).catch(o=>n._handleGetDataError(o)):n._initializeTransport()}}).catch(function(i){if(!n._isConnecting())return;if(i instanceof _){n._failUnauthorized();return}n.emit("error",{type:"connectToken",error:{code:5,message:i!==void 0?i.toString():""}});let o=n._getReconnectDelay();n._debug("error on getting connection token, reconnect after "+o+" milliseconds",i),n._reconnecting=!1,n._reconnectTimeout=setTimeout(()=>{n._startReconnecting()},o)})}_handleGetDataError(e){if(e instanceof _){this._failUnauthorized();return}this.emit("error",{type:"connectData",error:{code:12,message:e?.toString()||""}});let t=this._getReconnectDelay();this._debug("error on getting connect data, reconnect after "+t+" milliseconds",e),this._reconnecting=!1,this._reconnectTimeout=setTimeout(()=>{this._startReconnecting()},t)}_connectError(e){this.state==="connecting"&&(e.code===109&&(this._refreshRequired=!0),e.code<100||e.temporary===!0||e.code===109?(this.emit("error",{type:"connect",error:e}),this._debug("closing transport due to connect error"),this._disconnect(e.code,e.message,!0)):this._disconnect(e.code,e.message,!1))}_scheduleReconnect(){if(!this._isConnecting())return;let e=!1;this._emulation&&!this._transportWasOpen&&!this._triedAllTransports&&(e=!0);let t=this._getReconnectDelay();e&&(t=0),this._debug("reconnect after "+t+" milliseconds"),this._clearReconnectTimeout(),this._reconnectTimeout=setTimeout(()=>{this._startReconnecting()},t)}_constructConnectCommand(){let e={};this._token&&(e.token=this._token),this._data&&(e.data=this._data),this._config.name&&(e.name=this._config.name),this._config.version&&(e.version=this._config.version),Object.keys(this._config.headers).length>0&&(e.headers=this._config.headers);let t={},n=!1;for(let i in this._serverSubs)if(this._serverSubs.hasOwnProperty(i)&&this._serverSubs[i].recoverable){n=!0;let o={recover:!0};this._serverSubs[i].offset&&(o.offset=this._serverSubs[i].offset),this._serverSubs[i].epoch&&(o.epoch=this._serverSubs[i].epoch),t[i]=o}return n&&(e.subs=t),{connect:e}}_getHistoryRequest(e,t){let n={channel:e};return t!==void 0&&(t.since&&(n.since={offset:t.since.offset},t.since.epoch&&(n.since.epoch=t.since.epoch)),t.limit!==void 0&&(n.limit=t.limit),t.reverse===!0&&(n.reverse=!0)),n}_methodCall(){return this._isConnected()?Promise.resolve():new Promise((e,t)=>{let n=setTimeout(function(){t({code:1,message:"timeout"})},this._config.timeout);this._promises[this._nextPromiseId()]={timeout:n,resolve:e,reject:t}})}_callPromise(e,t){return new Promise((n,i)=>{this._call(e,!1).then(o=>{n(t(o.reply)),o.next&&o.next()},o=>{i(o.error),o.next&&o.next()})})}_dataReceived(e){this._serverPing>0&&this._waitServerPing();let t=this._codec.decodeReplies(e);this._dispatchPromise=this._dispatchPromise.then(()=>{let n;this._dispatchPromise=new Promise(i=>{n=i}),this._dispatchSynchronized(t,n)})}_dispatchSynchronized(e,t){let n=Promise.resolve();for(let i in e)e.hasOwnProperty(i)&&(n=n.then(()=>this._dispatchReply(e[i])));n=n.then(()=>{t()})}_dispatchReply(e){let t,n=new Promise(o=>{t=o});if(e==null)return this._debug("dispatch: got undefined or null reply"),t(),n;let i=e.id;return i&&i>0?this._handleReply(e,t):e.push?this._handlePush(e.push,t):this._handleServerPing(t),n}_call(e,t){return new Promise((n,i)=>{e.id=this._nextCommandId(),this._registerCall(e.id,n,i),t||this._addCommand(e)})}_startConnecting(){this._debug("start connecting"),this._setState("connecting")&&this.emit("connecting",{code:0,reason:"connect called"}),this._client=null,this._startReconnecting()}_disconnect(e,t,n){if(this._isDisconnected())return;this._transportIsOpen=!1;let i=this.state;this._reconnecting=!1;let o={code:e,reason:t},a=!1;if(n?a=this._setState("connecting"):(a=this._setState("disconnected"),this._rejectPromises({code:3,message:"disconnected"})),this._clearOutgoingRequests(),i==="connecting"&&this._clearReconnectTimeout(),i==="connected"&&this._clearConnectedState(),a&&(this._isConnecting()?this.emit("connecting",o):this.emit("disconnected",o)),this._transport){this._debug("closing existing transport");let c=this._transport;this._transport=null,c.close(),this._transportClosed=!0,this._nextTransportId()}else this._debug("no transport to close");this._scheduleReconnect()}_failUnauthorized(){this._disconnect(1,"unauthorized",!1)}_getToken(){if(this._debug("get connection token"),!this._config.getToken)throw this.emit("error",{type:"configuration",error:{code:12,message:"token expired but no getToken function set in the configuration"}}),new _("");return this._config.getToken({})}_refresh(){let e=this._client,t=this;this._getToken().then(function(n){if(e!==t._client)return;if(!n){t._failUnauthorized();return}if(t._token=n,t._debug("connection token refreshed"),!t._isConnected())return;let i={refresh:{token:t._token}};t._call(i,!1).then(o=>{let a=o.reply.refresh;t._refreshResponse(a),o.next&&o.next()},o=>{t._refreshError(o.error),o.next&&o.next()})}).catch(function(n){if(t._isConnected()){if(n instanceof _){t._failUnauthorized();return}t.emit("error",{type:"refreshToken",error:{code:6,message:n!==void 0?n.toString():""}}),t._refreshTimeout=setTimeout(()=>t._refresh(),t._getRefreshRetryDelay())}})}_refreshError(e){e.code<100||e.temporary===!0?(this.emit("error",{type:"refresh",error:e}),this._refreshTimeout=setTimeout(()=>this._refresh(),this._getRefreshRetryDelay())):this._disconnect(e.code,e.message,!1)}_getRefreshRetryDelay(){return S(0,5e3,1e4)}_refreshResponse(e){this._refreshTimeout&&(clearTimeout(this._refreshTimeout),this._refreshTimeout=null),e.expires&&(this._client=e.client,this._refreshTimeout=setTimeout(()=>this._refresh(),T(e.ttl)))}_removeSubscription(e){e!==null&&delete this._subs[e.channel]}_unsubscribe(e){if(!this._transportIsOpen)return Promise.resolve();let n={unsubscribe:{channel:e.channel}},i=this;return new Promise((a,c)=>{this._call(n,!1).then(u=>{a(),u.next&&u.next()},u=>{a(),u.next&&u.next(),i._disconnect(4,"unsubscribe error",!0)})})}_getSub(e){let t=this._subs[e];return t||null}_isServerSub(e){return this._serverSubs[e]!==void 0}_sendSubscribeCommands(){let e=[];for(let t in this._subs){if(!this._subs.hasOwnProperty(t))continue;let n=this._subs[t];if(n._inflight!==!0&&n.state==="subscribing"){let i=n._subscribe();i&&e.push(i)}}return e}_connectResponse(e){if(this._transportIsOpen=!0,this._transportWasOpen=!0,this._reconnectAttempts=0,this._refreshRequired=!1,this._isConnected())return;this._client=e.client,this._setState("connected"),this._refreshTimeout&&clearTimeout(this._refreshTimeout),e.expires&&(this._refreshTimeout=setTimeout(()=>this._refresh(),T(e.ttl))),this._session=e.session,this._node=e.node,this.startBatching(),this._sendSubscribeCommands(),this.stopBatching();let t={client:e.client,transport:this._transport.subName()};e.data&&(t.data=e.data),this.emit("connected",t),this._resolvePromises(),this._processServerSubs(e.subs||{}),e.ping&&e.ping>0?(this._serverPing=e.ping*1e3,this._sendPong=e.pong===!0,this._waitServerPing()):this._serverPing=0}_processServerSubs(e){for(let t in e){if(!e.hasOwnProperty(t))continue;let n=e[t];this._serverSubs[t]={offset:n.offset,epoch:n.epoch,recoverable:n.recoverable||!1};let i=this._getSubscribeContext(t,n);this.emit("subscribed",i)}for(let t in e){if(!e.hasOwnProperty(t))continue;let n=e[t];if(n.recovered){let i=n.publications;if(i&&i.length>0)for(let o in i)i.hasOwnProperty(o)&&this._handlePublication(t,i[o])}}for(let t in this._serverSubs)this._serverSubs.hasOwnProperty(t)&&(e[t]||(this.emit("unsubscribed",{channel:t}),delete this._serverSubs[t]))}_clearRefreshTimeout(){this._refreshTimeout!==null&&(clearTimeout(this._refreshTimeout),this._refreshTimeout=null)}_clearReconnectTimeout(){this._reconnectTimeout!==null&&(clearTimeout(this._reconnectTimeout),this._reconnectTimeout=null)}_clearServerPingTimeout(){this._serverPingTimeout!==null&&(clearTimeout(this._serverPingTimeout),this._serverPingTimeout=null)}_waitServerPing(){this._config.maxServerPingDelay!==0&&this._isConnected()&&(this._clearServerPingTimeout(),this._serverPingTimeout=setTimeout(()=>{this._isConnected()&&this._disconnect(2,"no ping",!0)},this._serverPing+this._config.maxServerPingDelay))}_getSubscribeContext(e,t){let n={channel:e,positioned:!1,recoverable:!1,wasRecovering:!1,recovered:!1};t.recovered&&(n.recovered=!0),t.positioned&&(n.positioned=!0),t.recoverable&&(n.recoverable=!0),t.was_recovering&&(n.