xstate/dist/xstate.web.js

Finite State Machines and Statecharts for the Modern Web.

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/*! *****************************************************************************
Copyright (c) Microsoft Corporation.

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */function Et(t,e){var i={};for(var n in t)Object.prototype.hasOwnProperty.call(t,n)&&e.indexOf(n)<0&&(i[n]=t[n]);if(null!=t&&"function"==typeof Object.getOwnPropertySymbols){var s=0;for(n=Object.getOwnPropertySymbols(t);s<n.length;s++)e.indexOf(n[s])<0&&Object.prototype.propertyIsEnumerable.call(t,n[s])&&(i[n[s]]=t[n[s]])}return i}const kt=t=>"atomic"===t.type||"final"===t.type;function Nt(t){return Object.keys(t.states).map(e=>t.states[e])}function Tt(t){return Nt(t).filter(t=>"history"!==t.type)}function At(t){const e=[t];return kt(t)?e:e.concat($(Tt(t).map(At)))}function $t(t,e){const i=Pt(new Set(t)),n=new Set(e);for(const t of n){let e=t.parent;for(;e&&!n.has(e);)n.add(e),e=e.parent}const s=Pt(n);for(const t of n)if("compound"!==t.type||s.get(t)&&s.get(t).length){if("parallel"===t.type)for(const e of 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Make sure .start() is called for this service, or set { deferEvents: true } in the service options.\nEvent: ${JSON.stringify(i.data)}`);return this.scheduler.schedule(()=>{this.forward(i);const t=this._nextState(i);this.update(t,i)}),this._state},this.sendTo=(t,i,n)=>{const s=this.parent&&(i===e.Parent||this.parent.id===i),o=s?this.parent:z(i)?i===e.Internal?this:this.children.get(i)||Ft.get(i):(r=i)&&"function"==typeof r.send?i:void 0;var r;if(o)if("machine"in o){if(this.status!==Ht.Stopped||this.parent!==o||this.state.done){const e=Object.assign(Object.assign({},t),{name:t.name===v?""+mt(this.id):t.name,origin:this.sessionId});!n&&this.machine.config.predictableActionArguments?this._outgoingQueue.push([o,e]):o.send(e)}}else!n&&this.machine.config.predictableActionArguments?this._outgoingQueue.push([o,t.data]):o.send(t.data);else if(!s)throw new Error(`Unable to send event to child '${i}' from service '${this.id}'.`)},this._exec=(e,a,c,h=this.machine.options.actions)=>{const d=e.exec||tt(e.type,h),l=M(d)?d:d?d.exec:e.exec;if(l)try{return l(a,c.data,this.machine.config.predictableActionArguments?{action:e,_event:c}:{action:e,state:this.state,_event:c})}catch(t){throw this.parent&&this.parent.send({type:"xstate.error",data:t}),t}switch(e.type){case s:{const t=e;this.defer(t);break}case o:const h=e;if("number"==typeof h.delay)return void this.defer(h);h.to?this.sendTo(h._event,h.to,c===Z):this.send(h._event);break;case r:this.cancel(e.sendId);break;case i:{if(this.status!==Ht.Running)return;const i=e.activity;if(!this.machine.config.predictableActionArguments&&!this.state.activities[i.id||i.type])break;if(i.type===t.Invoke){const t=G(i.src),e=this.machine.options.services?this.machine.options.services[t.type]:void 0,{id:n,data:s}=i,o="autoForward"in i?i.autoForward:!!i.forward;if(!e)return;const r=s?C(s,a,c):void 0;if("string"==typeof e)return;let h,d=M(e)?e(a,c.data,{data:r,src:t,meta:i.meta}):e;if(!d)return;F(d)&&(d=r?d.withContext(r):d,h={autoForward:o}),this.spawn(d,n,h)}else this.spawnActivity(i);break}case n:this.stopChild(e.activity.id);break;case u:const{label:d,value:l}=e;d?this.logger(d,l):this.logger(l)}};const h=Object.assign(Object.assign({},Gt.defaultOptions),c),{clock:d,logger:l,parent:f,id:p}=h,g=void 0!==p?p:a.id;this.id=g,this.logger=l,this.clock=d,this.parent=f,this.options=h,this.scheduler=new zt({deferEvents:this.options.deferEvents}),this.sessionId=Ft.bookId()}get initialState(){return this._initialState?this._initialState:_t(this,()=>(this._initialState=this.machine.initialState,this._initialState))}get state(){return this._state}execute(t,e){for(const i of t.actions)this.exec(i,t,e)}update(t,e){if(t._sessionid=this.sessionId,this._state=t,this.machine.config.predictableActionArguments&&e!==Z||!this.options.execute){let t;for(;t=this._outgoingQueue.shift();)t[0].send(t[1])}else this.execute(this.state);if(this.children.forEach(t=>{this.state.children[t.id]=t}),this.devTools&&this.devTools.send(e.data,t),t.event)for(const e of this.eventListeners)e(t.event);for(const e of this.listeners)e(t,t.event);for(const t of this.contextListeners)t(this.state.context,this.state.history?this.state.history.context:void 0);if(this.state.done){const i=t.configuration.find(t=>"final"===t.type&&t.parent===this.machine),n=i&&i.doneData?C(i.doneData,t.context,e):void 0;this._doneEvent=yt(this.id,n);for(const t of this.doneListeners)t(this._doneEvent);this._stop(),this._stopChildren(),Ft.free(this.sessionId)}}onTransition(t){return this.listeners.add(t),this.status===Ht.Running&&t(this.state,this.state.event),this}subscribe(t,e,i){const n=K(t,e,i);this.listeners.add(n.next),this.status!==Ht.NotStarted&&n.next(this.state);const s=()=>{this.doneListeners.delete(s),this.stopListeners.delete(s),n.complete()};return this.status===Ht.Stopped?n.complete():(this.onDone(s),this.onStop(s)),{unsubscribe:()=>{this.listeners.delete(n.next),this.doneListeners.delete(s),this.stopListeners.delete(s)}}}onEvent(t){return this.eventListeners.add(t),this}onSend(t){return this.sendListeners.add(t),this}onChange(t){return this.contextListeners.add(t),this}onStop(t){return this.stopListeners.add(t),this}onDone(t){return this.status===Ht.Stopped&&this._doneEvent?t(this._doneEvent):this.doneListeners.add(t),this}off(t){return this.listeners.delete(t),this.eventListeners.delete(t),this.sendListeners.delete(t),this.stopListeners.delete(t),this.doneListeners.delete(t),this.contextListeners.delete(t),this}start(t){if(this.status===Ht.Running)return this;this.machine._init(),Ft.register(this.sessionId,this),this.initialized=!0,this.status=Ht.Running;const e=void 0===t?this.initialState:_t(this,()=>{return"object"==typeof(e=t)&&null!==e&&"value"in e&&"_event"in e?this.machine.resolveState(t):this.machine.resolveState(Rt.from(t,this.machine.context));var e});return this.options.devTools&&this.attachDev(),this.scheduler.initialize(()=>{this.update(e,Z)}),this}_stopChildren(){this.children.forEach(t=>{M(t.stop)&&t.stop()}),this.children.clear()}_stop(){for(const t of this.listeners)this.listeners.delete(t);for(const t of this.stopListeners)t(),this.stopListeners.delete(t);for(const t of this.contextListeners)this.contextListeners.delete(t);for(const t of this.doneListeners)this.doneListeners.delete(t);if(!this.initialized)return this;this.initialized=!1,this.status=Ht.Stopped,this._initialState=void 0;for(const t of Object.keys(this.delayedEventsMap))this.clock.clearTimeout(this.delayedEventsMap[t]);this.scheduler.clear(),this.scheduler=new zt({deferEvents:this.options.deferEvents})}stop(){const t=this.scheduler;return this._stop(),t.schedule(()=>{const t=Q({type:"xstate.stop"}),e=_t(this,()=>{const e=$([...this.state.configuration].sort((t,e)=>e.order-t.order).map(t=>it(t.onExit,this.machine.options.actions))),[i,n]=bt(this.machine,this.state,this.state.context,t,[{type:"exit",actions:e}],this.machine.config.predictableActionArguments?this._exec:void 0,this.machine.config.predictableActionArguments||this.machine.config.preserveActionOrder),s=new Rt({value:this.state.value,context:n,_event:t,_sessionid:this.sessionId,historyValue:void 0,history:this.state,actions:i.filter(t=>!Y(t)),activities:{},events:[],configuration:[],transitions:[],children:{},done:this.state.done,tags:this.state.tags,machine:this.machine});return s.changed=!0,s});this.update(e,t),this._stopChildren(),Ft.free(this.sessionId)}),this}batch(t){if(this.status===Ht.NotStarted&&this.options.deferEvents);else if(this.status!==Ht.Running)throw new Error(`${t.length} event(s) were sent to uninitialized service "${this.machine.id}". Make sure .start() is called for this service, or set { deferEvents: true } in the service options.`);if(!t.length)return;const e=!!this.machine.config.predictableActionArguments&&this._exec;this.scheduler.schedule(()=>{let i=this.state,n=!1;const s=[];for(const o of t){const t=Q(o);this.forward(t),i=_t(this,()=>this.machine.transition(i,t,void 0,e||void 0)),s.push(...this.machine.config.predictableActionArguments?i.actions:i.actions.map(t=>Dt(t,i))),n=n||!!i.changed}i.changed=n,i.actions=s,this.update(i,Q(t[t.length-1]))})}sender(t){return this.send.bind(this,t)}_nextState(t,e=!!this.machine.config.predictableActionArguments&&this._exec){const i=Q(t);if(0===i.name.indexOf(g)&&!this.state.nextEvents.some(t=>0===t.indexOf(g)))throw i.data.data;return _t(this,()=>this.machine.transition(this.state,i,void 0,e||void 0))}nextState(t){return this._nextState(t,!1)}forward(t){for(const e of this.forwardTo){const i=this.children.get(e);if(!i)throw new Error(`Unable to forward event '${t}' from interpreter '${this.id}' to nonexistant child '${e}'.`);i.send(t)}}defer(t){const e=this.clock.setTimeout(()=>{"to"in t&&t.to?this.sendTo(t._event,t.to,!0):this.send(t._event)},t.delay);t.id&&(this.delayedEventsMap[t.id]=e)}cancel(t){this.clock.clearTimeout(this.delayedEventsMap[t]),delete this.delayedEventsMap[t]}exec(t,e,i=this.machine.options.actions){this._exec(t,e.context,e._event,i)}removeChild(t){var e;this.children.delete(t),this.forwardTo.delete(t),null===(e=this.state)||void 0===e||delete e.children[t]}stopChild(t){const e=this.children.get(t);e&&(this.removeChild(t),M(e.stop)&&e.stop())}spawn(t,e,i){if(this.status!==Ht.Running)return wt(t,e);if(V(t))return this.spawnPromise(Promise.resolve(t),e);if(M(t))return this.spawnCallback(t,e);if(function(t){try{return"function"==typeof t.send}catch(t){return!1}}(s=t)&&"id"in s)return this.spawnActor(t,e);if(function(t){try{return"subscribe"in t&&M(t.subscribe)}catch(t){return!1}}(t))return this.spawnObservable(t,e);if(F(t))return this.spawnMachine(t,Object.assign(Object.assign({},i),{id:e}));if(null!==(n=t)&&"object"==typeof n&&"transition"in n&&"function"==typeof n.transition)return this.spawnBehavior(t,e);throw new Error(`Unable to spawn entity "${e}" of type "${typeof t}".`);var n,s}spawnMachine(t,e={}){const i=new Gt(t,Object.assign(Object.assign({},this.options),{parent:this,id:e.id||t.id})),n=Object.assign(Object.assign({},Xt),e);n.sync&&i.onTransition(t=>{this.send(y,{state:t,id:i.id})});const s=i;return this.children.set(i.id,s),n.autoForward&&this.forwardTo.add(i.id),i.onDone(t=>{this.removeChild(i.id),this.send(Q(t,{origin:i.id}))}).start(),s}spawnBehavior(t,e){const i=Qt(t,{id:e,parent:this});return this.children.set(e,i),i}spawnPromise(t,e){let i,n=!1;t.then(t=>{n||(i=t,this.removeChild(e),this.send(Q(yt(e,t),{origin:e})))},t=>{if(!n){this.removeChild(e);const i=mt(e,t);try{this.send(Q(i,{origin:e}))}catch(t){this.devTools&&this.devTools.send(i,this.state),this.machine.strict&&this.stop()}}});const s={id:e,send:()=>{},subscribe:(e,i,n)=>{const s=K(e,i,n);let o=!1;return t.then(t=>{o||(s.next(t),o||s.complete())},t=>{o||s.error(t)}),{unsubscribe:()=>o=!0}},stop:()=>{n=!0},toJSON:()=>({id:e}),getSnapshot:()=>i,[B]:function(){return this}};return this.children.set(e,s),s}spawnCallback(t,e){let i=!1;const n=new Set,s=new Set;let o;const r=t=>{o=t,s.forEach(e=>e(t)),i||this.send(Q(t,{origin:e}))};let a;try{a=t(r,t=>{n.add(t)})}catch(t){this.send(mt(e,t))}if(V(a))return this.spawnPromise(a,e);const c={id:e,send:t=>n.forEach(e=>e(t)),subscribe:t=>{const e=K(t);return s.add(e.next),{unsubscribe:()=>{s.delete(e.next)}}},stop:()=>{i=!0,M(a)&&a()},toJSON:()=>({id:e}),getSnapshot:()=>o,[B]:function(){return this}};return this.children.set(e,c),c}spawnObservable(t,e){let i;const n=t.subscribe(t=>{i=t,this.send(Q(t,{origin:e}))},t=>{this.removeChild(e),this.send(Q(mt(e,t),{origin:e}))},()=>{this.removeChild(e),this.send(Q(yt(e),{origin:e}))}),s={id:e,send:()=>{},subscribe:(e,i,n)=>t.subscribe(e,i,n),stop:()=>n.unsubscribe(),getSnapshot:()=>i,toJSON:()=>({id:e}),[B]:function(){return this}};return this.children.set(e,s),s}spawnActor(t,e){return this.children.set(e,t),t}spawnActivity(t){const e=this.machine.options&&this.machine.options.activities?this.machine.options.activities[t.type]:void 0;if(!e)return;const i=e(this.state.context,t);this.spawnEffect(t.id,i)}spawnEffect(t,e){this.children.set(t,{id:t,send:()=>{},subscribe:()=>({unsubscribe:()=>{}}),stop:e||void 0,getSnapshot:()=>{},toJSON:()=>({id:t}),[B]:function(){return this}})}attachDev(){const t=Jt();if(this.options.devTools&&t){if(t.__REDUX_DEVTOOLS_EXTENSION__){const e="object"==typeof this.options.devTools?this.options.devTools:void 0;this.devTools=t.__REDUX_DEVTOOLS_EXTENSION__.connect(Object.assign(Object.assign({name:this.id,autoPause:!0,stateSanitizer:t=>({value:t.value,context:t.context,actions:t.actions})},e),{features:Object.assign({jump:!1,skip:!1},e?e.features:void 0)}),this.machine),this.devTools.init(this.state)}qt(this)}}toJSON(){return{id:this.id}}[B](){return this}getSnapshot(){return this.status===Ht.NotStarted?this.initialState:this._state}}Gt.defaultOptions={execute:!0,deferEvents:!0,clock:{setTimeout:(t,e)=>setTimeout(t,e),clearTimeout:t=>clearTimeout(t)},logger:console.log.bind(console),devTools:!1},Gt.interpret=Wt;function Kt(t,e){const i=(t=>z(t)?Object.assign(Object.assign({},Xt),{name:t}):Object.assign(Object.assign(Object.assign({},Xt),{name:J()}),t))(e);return(e=>e?e.spawn(t,i.name,i):wt(t,i.name))(Ot[Ot.length-1])}function Wt(t,e){return new Gt(t,e)}function Yt(t){if("string"==typeof t){const e={type:t,toString:()=>t};return e}return t}function Zt(t){return Object.assign(Object.assign({type:f},t),{toJSON(){const e=Et(t,["onDone","onError"]);return Object.assign(Object.assign({},e),{type:f,src:Yt(t.src)})}})}const te={},ee=t=>"#"===t[0];class ie{constructor(t,e,i=("context"in t?t.context:void 0),n){var s;this.config=t,this._context=i,this.order=-1,this.__xstatenode=!0,this.__cache={events:void 0,relativeValue:new Map,initialStateValue:void 0,initialState:void 0,on:void 0,transitions:void 0,candidates:{},delayedTransitions:void 0},this.idMap={},this.tags=[],this.options=Object.assign({actions:{},guards:{},services:{},activities:{},delays:{}},e),this.parent=null==n?void 0:n.parent,this.key=this.config.key||(null==n?void 0:n.key)||this.config.id||"(machine)",this.machine=this.parent?this.parent.machine:this,this.path=this.parent?this.parent.path.concat(this.key):[],this.delimiter=this.config.delimiter||(this.parent?this.parent.delimiter:"."),this.id=this.config.id||[this.machine.key,...this.path].join(this.delimiter),this.version=this.parent?this.parent.version:this.config.version,this.type=this.config.type||(this.config.parallel?"parallel":this.config.states&&Object.keys(this.config.states).length?"compound":this.config.history?"history":"atomic"),this.schema=this.parent?this.machine.schema:null!==(s=this.config.schema)&&void 0!==s?s:{},this.description=this.config.description,this.initial=this.config.initial,this.states=this.config.states?k(this.config.states,(t,e)=>{const i=new ie(t,{},void 0,{parent:this,key:e});return Object.assign(this.idMap,Object.assign({[i.id]:i},i.idMap)),i}):te;let o=0;!function t(e){e.order=o++;for(const i of Nt(e))t(i)}(this),this.history=!0===this.config.history?"shallow":this.config.history||!1,this._transient=!!this.config.always||!!this.config.on&&(Array.isArray(this.config.on)?this.config.on.some(({event:t})=>""===t):""in this.config.on),this.strict=!!this.config.strict,this.onEntry=I(this.config.entry||this.config.onEntry).map(t=>et(t)),this.onExit=I(this.config.exit||this.config.onExit).map(t=>et(t)),this.meta=this.config.meta,this.doneData="final"===this.type?this.config.data:void 0,this.invoke=I(this.config.invoke).map((t,e)=>{if(F(t)){const i=W(this.id,e);return this.machine.options.services=Object.assign({[i]:t},this.machine.options.services),Zt({src:i,id:i})}if(z(t.src)){const i=t.id||W(this.id,e);return Zt(Object.assign(Object.assign({},t),{id:i,src:t.src}))}if(F(t.src)||M(t.src)){const i=t.id||W(this.id,e);return this.machine.options.services=Object.assign({[i]:t.src},this.machine.options.services),Zt(Object.assign(Object.assign({id:i},t),{src:i}))}{const i=t.src;return Zt(Object.assign(Object.assign({id:W(this.id,e)},t),{src:i}))}}),this.activities=I(this.config.activities).concat(this.invoke).map(t=>nt(t)),this.transition=this.transition.bind(this),this.tags=I(this.config.tags)}_init(){this.__cache.transitions||At(this).forEach(t=>t.on)}withConfig(t,e){const{actions:i,activities:n,guards:s,services:o,delays:r}=this.options;return new ie(this.config,{actions:Object.assign(Object.assign({},i),t.actions),activities:Object.assign(Object.assign({},n),t.activities),guards:Object.assign(Object.assign({},s),t.guards),services:Object.assign(Object.assign({},o),t.services),delays:Object.assign(Object.assign({},r),t.delays)},null!=e?e:this.context)}withContext(t){return new ie(this.config,this.options,t)}get context(){return M(this._context)?this._context():this._context}get definition(){return{id:this.id,key:this.key,version:this.version,context:this.context,type:this.type,initial:this.initial,history:this.history,states:k(this.states,t=>t.definition),on:this.on,transitions:this.transitions,entry:this.onEntry,exit:this.onExit,activities:this.activities||[],meta:this.meta,order:this.order||-1,data:this.doneData,invoke:this.invoke,description:this.description,tags:this.tags}}toJSON(){return this.definition}get on(){if(this.__cache.on)return this.__cache.on;const t=this.transitions;return this.__cache.on=t.reduce((t,e)=>(t[e.eventType]=t[e.eventType]||[],t[e.eventType].push(e),t),{})}get after(){return this.__cache.delayedTransitions||(this.__cache.delayedTransitions=this.getDelayedTransitions(),this.__cache.delayedTransitions)}get transitions(){return this.__cache.transitions||(this.__cache.transitions=this.formatTransitions(),this.__cache.transitions)}getCandidates(t){if(this.__cache.candidates[t])return this.__cache.candidates[t];const e=""===t,i=this.transitions.filter(i=>{const n=i.eventType===t;return e?n:n||"*"===i.eventType});return this.__cache.candidates[t]=i,i}getDelayedTransitions(){const t=this.config.after;if(!t)return[];const e=(t,e)=>{const i=gt(M(t)?`${this.id}:delay[${e}]`:t,this.id);return this.onEntry.push(rt(i,{delay:t})),this.onExit.push(ut(i)),i};return(R(t)?t.map((t,i)=>{const n=e(t.delay,i);return Object.assign(Object.assign({},t),{event:n})}):$(Object.keys(t).map((i,n)=>{const s=t[i],o=z(s)?{target:s}:s,r=isNaN(+i)?i:+i,a=e(r,n);return I(o).map(t=>Object.assign(Object.assign({},t),{event:a,delay:r}))}))).map(t=>{const{delay:e}=t;return Object.assign(Object.assign({},this.formatTransition(t)),{delay:e})})}getStateNodes(t){if(!t)return[];const e=t instanceof Rt?t.value:j(t,this.delimiter);if(z(e)){const t=this.getStateNode(e).initial;return void 0!==t?this.getStateNodes({[e]:t}):[this,this.states[e]]}const i=Object.keys(e),n=[this];return n.push(...$(i.map(t=>this.getStateNode(t).getStateNodes(e[t])))),n}handles(t){const e=x(t);return this.events.includes(e)}resolveState(t){const e=t instanceof Rt?t:Rt.create(t),i=Array.from($t([],this.getStateNodes(e.value)));return new Rt(Object.assign(Object.assign({},e),{value:this.resolve(e.value),configuration:i,done:Vt(i,this),tags:Lt(i),machine:this.machine}))}transitionLeafNode(t,e,i){const n=this.getStateNode(t).next(e,i);return n&&n.transitions.length?n:this.next(e,i)}transitionCompoundNode(t,e,i){const n=Object.keys(t),s=this.getStateNode(n[0])._transition(t[n[0]],e,i);return s&&s.transitions.length?s:this.next(e,i)}transitionParallelNode(t,e,i){const n={};for(const s of Object.keys(t)){const o=t[s];if(!o)continue;const r=this.getStateNode(s)._transition(o,e,i);r&&(n[s]=r)}const s=Object.keys(n).map(t=>n[t]),o=$(s.map(t=>t.transitions));if(!s.some(t=>t.transitions.length>0))return this.next(e,i);const r=$(Object.keys(n).map(t=>n[t].configuration));return{transitions:o,exitSet:$(s.map(t=>t.exitSet)),configuration:r,source:e,actions:$(Object.keys(n).map(t=>n[t].actions))}}_transition(t,e,i){return z(t)?this.transitionLeafNode(t,e,i):1===Object.keys(t).length?this.transitionCompoundNode(t,e,i):this.transitionParallelNode(t,e,i)}getTransitionData(t,e){return this._transition(t.value,t,Q(e))}next(t,e){const i=e.name,n=[];let s,o=[];for(const r of this.getCandidates(i)){const{cond:a,in:c}=r,h=t.context,d=!c||(z(c)&&ee(c)?t.matches(j(this.getStateNodeById(c).path,this.delimiter)):_(j(c,this.delimiter),T(this.path.slice(0,-2))(t.value)));let u=!1;try{u=!a||H(this.machine,a,h,e,t)}catch(t){throw new Error(`Unable to evaluate guard '${a.name||a.type}' in transition for event '${i}' in state node '${this.id}':\n${t.message}`)}if(u&&d){void 0!==r.target&&(o=r.target),n.push(...r.actions),s=r;break}}if(!s)return;if(!o.length)return{transitions:[s],exitSet:[],configuration:t.value?[this]:[],source:t,actions:n};const r=$(o.map(e=>this.getRelativeStateNodes(e,t.historyValue)));return{transitions:[s],exitSet:!!s.internal?[]:$(o.map(t=>this.getPotentiallyReenteringNodes(t))),configuration:r,source:t,actions:n}}getPotentiallyReenteringNodes(t){if(this.order<t.order)return[this];const e=[];let i=this,n=t;for(;i&&i!==n;)e.push(i),i=i.parent;return i!==n?[]:(e.push(n),e)}getActions(t,e,i,n,s,o,r){const a=o?$t([],this.getStateNodes(o.value)):[],c=new Set;for(const e of Array.from(t).sort((t,e)=>t.order-e.order))(!Ct(a,e)||Ct(i.exitSet,e)||e.parent&&c.has(e.parent))&&c.add(e);for(const e of a)Ct(t,e)&&!Ct(i.exitSet,e.parent)||i.exitSet.push(e);i.exitSet.sort((t,e)=>e.order-t.order);const h=Array.from(c).sort((t,e)=>t.order-e.order),d=new Set(i.exitSet),u=$(h.map(t=>{const e=[];if("final"!==t.type)return e;const o=t.parent;if(!o.parent)return e;e.push(vt(t.id,t.doneData),vt(o.id,t.doneData?C(t.doneData,n,s):void 0));const r=o.parent;return"parallel"===r.type&&Tt(r).every(t=>Vt(i.configuration,t))&&e.push(vt(r.id)),e})),l=h.map(t=>{const e=t.onEntry,i=t.activities.map(t=>lt(t));return{type:"entry",actions:it(r?[...e,...i]:[...i,...e],this.machine.options.actions)}}).concat({type:"state_done",actions:u.map(t=>st(t))}),f=Array.from(d).map(t=>({type:"exit",actions:it([...t.onExit,...t.activities.map(t=>ft(t))],this.machine.options.actions)})).concat({type:"transition",actions:it(i.actions,this.machine.options.actions)}).concat(l);if(e){const e=it($([...t].sort((t,e)=>e.order-t.order).map(t=>t.onExit)),this.machine.options.actions).filter(t=>!Y(t));return f.concat({type:"stop",actions:e})}return f}transition(t=this.initialState,e,i,n){const s=Q(e);let o;if(t instanceof Rt)o=void 0===i?t:this.resolveState(Rt.from(t,i));else{const e=z(t)?this.resolve(E(this.getResolvedPath(t))):this.resolve(t),n=null!=i?i:this.machine.context;o=this.resolveState(Rt.from(e,n))}if(this.strict&&!this.events.includes(s.name)&&(r=s.name,!/^(done|error)\./.test(r)))throw new Error(`Machine '${this.id}' does not accept event '${s.name}'`);var r;const a=this._transition(o.value,o,s)||{transitions:[],configuration:[],exitSet:[],source:o,actions:[]},c=$t([],this.getStateNodes(o.value)),h=a.configuration.length?$t(c,a.configuration):c;return a.configuration=[...h],this.resolveTransition(a,o,o.context,n,s)}resolveRaisedTransition(t,e,i,n){const s=t.actions;return(t=this.transition(t,e,void 0,n))._event=i,t.event=i.data,t.actions.unshift(...s),t}resolveTransition(t,e,s,o,r=Z){const{configuration:c}=t,h=!e||t.transitions.length>0,d=h?t.configuration:e?e.configuration:[],u=Vt(d,this),l=h?It(this.machine,c):void 0,p=e?e.historyValue?e.historyValue:t.source?this.machine.historyValue(e.value):void 0:void 0,g=this.getActions(new Set(d),u,t,s,r,e,o),v=e?Object.assign({},e.activities):{};for(const t of g)for(const e of t.actions)e.type===i?v[e.activity.id||e.activity.type]=e:e.type===n&&(v[e.activity.id||e.activity.type]=!1);const[m,b]=bt(this,e,s,r,g,o,this.machine.config.predictableActionArguments||this.machine.config.preserveActionOrder),[S,O]=function(t,e){const[i,n]=[[],[]];for(const s of t)e(s)?i.push(s):n.push(s);return[i,n]}(m,Y),_=m.filter(t=>{var e;return t.type===i&&(null===(e=t.activity)||void 0===e?void 0:e.type)===f}).reduce((t,e)=>(t[e.activity.id]=function(t,e,i,n){var s;const o=G(t.src),r=null===(s=null==e?void 0:e.options.services)||void 0===s?void 0:s[o.type],a=t.data?C(t.data,i,n):void 0,c=r?wt(r,t.id,a):xt(t.id);return c.meta=t,c}(e.activity,this.machine,b,r),t),e?Object.assign({},e.children):{}),x=new Rt({value:l||e.value,context:b,_event:r,_sessionid:e?e._sessionid:null,historyValue:l?p?(w=p,j=l,{current:j,states:L(w,j)}):void 0:e?e.historyValue:void 0,history:!l||t.source?e:void 0,actions:l?O:[],activities:l?v:e?e.activities:{},events:[],configuration:d,transitions:t.transitions,children:_,done:u,tags:Lt(d),machine:this});var w,j;const E=s!==b;x.changed=r.name===y||E;const{history:k}=x;k&&delete k.history;const N=!u&&(this._transient||c.some(t=>t._transient));if(!(h||N&&""!==r.name))return x;let T=x;if(!u)for(N&&(T=this.resolveRaisedTransition(T,{type:a},r,o));S.length;){const t=S.shift();T=this.resolveRaisedTransition(T,t._event,r,o)}const A=T.changed||(k?!!T.actions.length||E||typeof k.value!=typeof T.value||!function t(e,i){if(e===i)return!0;if(void 0===e||void 0===i)return!1;if(z(e)||z(i))return e===i;const n=Object.keys(e),s=Object.keys(i);return n.length===s.length&&n.every(n=>t(e[n],i[n]))}(T.value,k.value):void 0);return T.changed=A,T.history=k,T}getStateNode(t){if(ee(t))return this.machine.getStateNodeById(t);if(!this.states)throw new Error(`Unable to retrieve child state '${t}' from '${this.id}'; no child states exist.`);const e=this.states[t];if(!e)throw new Error(`Child state '${t}' does not exist on '${this.id}'`);return e}getStateNodeById(t){const e=ee(t)?t.slice("#".length):t;if(e===this.id)return this;const i=this.machine.idMap[e];if(!i)throw new Error(`Child state node '#${e}' does not exist on machine '${this.id}'`);return i}getStateNodeByPath(t){if("string"==typeof t&&ee(t))try{return this.getStateNodeById(t.slice(1))}catch(t){}const e=w(t,this.delimiter).slice();let i=this;for(;e.length;){const t=e.shift();if(!t.length)break;i=i.getStateNode(t)}return i}resolve(t){if(!t)return this.initialStateValue||te;switch(this.type){case"parallel":return k(this.initialStateValue,(e,i)=>e?this.getStateNode(i).resolve(t[i]||e):te);case"compound":if(z(t)){const e=this.getStateNode(t);return"parallel"===e.type||"compound"===e.type?{[t]:e.initialStateValue}:t}return Object.keys(t).length?k(t,(t,e)=>t?this.getStateNode(e).resolve(t):te):this.initialStateValue||{};default:return t||te}}getResolvedPath(t){if(ee(t)){const e=this.machine.idMap[t.slice("#".length)];if(!e)throw new Error(`Unable to find state node '${t}'`);return e.path}return w(t,this.delimiter)}get initialStateValue(){if(this.__cache.initialStateValue)return this.__cache.initialStateValue;let t;if("parallel"===this.type)t=N(this.states,t=>t.initialStateValue||te,t=>!("history"===t.type));else if(void 0!==this.initial){if(!this.states[this.initial])throw new Error(`Initial state '${this.initial}' not found on '${this.key}'`);t=kt(this.states[this.initial])?this.initial:{[this.initial]:this.states[this.initial].initialStateValue}}else t={};return this.__cache.initialStateValue=t,this.__cache.initialStateValue}getInitialState(t,e){this._init();const i=this.getStateNodes(t);return this.resolveTransition({configuration:i,exitSet:[],transitions:[],source:void 0,actions:[]},void 0,null!=e?e:this.machine.context,void 0)}get initialState(){const{initialStateValue:t}=this;if(!t)throw new Error(`Cannot retrieve initial state from simple state '${this.id}'.`);return this.getInitialState(t)}get target(){let t;if("history"===this.type){const e=this.config;t=z(e.target)&&ee(e.target)?E(this.machine.getStateNodeById(e.target).path.slice(this.path.length-1)):e.target}return t}getRelativeStateNodes(t,e,i=!0){return i?"history"===t.type?t.resolveHistory(e):t.initialStateNodes:[t]}get initialStateNodes(){if(kt(this))return[this];if("compound"===this.type&&!this.initial)return[this];return $(A(this.initialStateValue).map(t=>this.getFromRelativePath(t)))}getFromRelativePath(t){if(!t.length)return[this];const[e,...i]=t;if(!this.states)throw new Error(`Cannot retrieve subPath '${e}' from node with no states`);const n=this.getStateNode(e);if("history"===n.type)return n.resolveHistory();if(!this.states[e])throw new Error(`Child state '${e}' does not exist on '${this.id}'`);return this.states[e].getFromRelativePath(i)}historyValue(t){if(Object.keys(this.states).length)return{current:t||this.initialStateValue,states:N(this.states,(e,i)=>{if(!t)return e.historyValue();const n=z(t)?void 0:t[i];return e.historyValue(n||e.initialStateValue)},t=>!t.history)}}resolveHistory(t){if("history"!==this.type)return[this];const e=this.parent;if(!t){const t=this.target;return t?$(A(t).map(t=>e.getFromRelativePath(t))):e.initialStateNodes}const i=(n=e.path,s="states",t=>{let e=t;for(const t of n)e=e[s][t];return e})(t).current;var n,s;return z(i)?[e.getStateNode(i)]:$(A(i).map(t=>"deep"===this.history?e.getFromRelativePath(t):[e.states[t[0]]]))}get stateIds(){const t=$(Object.keys(this.states).map(t=>this.states[t].stateIds));return[this.id].concat(t)}get events(){if(this.__cache.events)return this.__cache.events;const{states:t}=this,e=new Set(this.ownEvents);if(t)for(const i of Object.keys(t)){const n=t[i];if(n.states)for(const t of n.events)e.add(""+t)}return this.__cache.events=Array.from(e)}get ownEvents(){const t=new Set(this.transitions.filter(t=>!(!t.target&&!t.actions.length&&t.internal)).map(t=>t.eventType));return Array.from(t)}resolveTarget(t){if(void 0!==t)return t.map(t=>{if(!z(t))return t;const e=t[0]===this.delimiter;if(e&&!this.parent)return this.getStateNodeByPath(t.slice(1));const i=e?this.key+t:t;if(!this.parent)return this.getStateNodeByPath(i);try{return this.parent.getStateNodeByPath(i)}catch(t){throw new Error(`Invalid transition definition for state node '${this.id}':\n${t.message}`)}})}formatTransition(t){const e=function(t){if(void 0!==t&&""!==t)return I(t)}(t.target),i="internal"in t?t.internal:!e||e.some(t=>z(t)&&t[0]===this.delimiter),{guards:n}=this.machine.options,s=this.resolveTarget(e),o=Object.assign(Object.assign({},t),{actions:it(I(t.actions)),cond:U(t.cond,n),target:s,source:this,internal:i,eventType:t.event,toJSON:()=>Object.assign(Object.assign({},o),{target:o.target?o.target.map(t=>"#"+t.id):void 0,source:"#"+this.id})});return o}formatTransitions(){let t;if(this.config.on)if(Array.isArray(this.config.on))t=this.config.on;else{const e=this.config.on,i="*",n=e[i],s=void 0===n?[]:n,o=Et(e,[i+""]);t=$(Object.keys(o).map(t=>X(t,o[t])).concat(X("*",s)))}else t=[];const e=this.config.always?X("",this.config.always):[],i=this.config.onDone?X(String(vt(this.id)),this.config.onDone):[],n=$(this.invoke.map(t=>{const e=[];return t.onDone&&e.push(...X(String(yt(t.id)),t.onDone)),t.onError&&e.push(...X(String(mt(t.id)),t.onError)),e})),s=this.after,o=$([...i,...n,...t,...e].map(t=>I(t).map(t=>this.formatTransition(t))));for(const t of s)o.push(t);return o}}function ne(t,e,i=t.context){return new ie(t,e,i)}function se(t,e){return new ie(t,e)}function oe(t,e){let i;for(const n of Object.keys(t))_(n,e)&&(!i||e.length>i.length)&&(i=n);return t[i]}function re(t,e,i){const n=Rt.from(t,t instanceof Rt?t.context:void 0);for(const[t,i]of e)if(n.matches(t))return i(n);return i(n)}function ae(t){return t}const ce=ae,{assign:he,send:de,sendTo:ue,sendParent:le,sendUpdate:fe,forwardTo:pe,doneInvoke:ge,raise:ve}=St;export{t as ActionTypes,Gt as Interpreter,Ht as InterpreterStatus,ne as Machine,e as SpecialTargets,Rt as State,ie as StateNode,St as actions,he as assign,se as createMachine,ae as createSchema,ge as doneInvoke,pe as forwardTo,Wt as interpret,oe as mapState,re as matchState,_ as matchesState,ve as raise,de as send,le as sendParent,ue as sendTo,fe as sendUpdate,Kt as spawn,Qt as spawnBehavior,ce as t,jt as toActorRef,q as toEventObject,K as toObserver,Q as toSCXMLEvent};