xstate - npm Package Compare versions

Comparing version 3.1.0 to 3.1.1

dist/xstate.js

@@ -1,1 +0,1 @@
-!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.xstate=e():t.xstate=e()}(this,function(){return function(t){function e(i){if(n[i])return n[i].exports;var a=n[i]={i:i,l:!1,exports:{}};return t[i].call(a.exports,a,a.exports,e),a.l=!0,a.exports}var n={};return e.m=t,e.c=n,e.d=function(t,n,i){e.o(t,n)||Object.defineProperty(t,n,{configurable:!1,enumerable:!0,get:i})},e.n=function(t){var n=t&&t.__esModule?function(){return t.default}:function(){return t};return e.d(n,"a",n),n},e.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},e.p="",e(e.s=4)}([function(t,e,n){"use strict";function i(t){try{return"string"==typeof t||"number"==typeof t?""+t:t.type}catch(t){throw new Error("Events must be strings or objects with a string event.type property.")}}function a(t){try{return Array.isArray(t)?t:t.toString().split(".")}catch(e){throw new Error("'"+t+"' is not a 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i=this,o=r.getEventType(t),s={onEntry:[],onExit:[],actions:[]},c={};if(this.onExit&&(s.onExit=this.onExit),this.activities&&this.activities.forEach(function(t){c[r.getEventType(t)]=!1,s.onExit=s.onExit.concat(u.stop(t))}),!this.on||!this.on[o])return{stateValue:void 0,actions:s,activities:c};var l,h=this.on[o];if("string"==typeof h)l=h;else for(var v=Array.isArray(h)?h:Object.keys(h).map(function(t){return a({},h[t],{target:t})}),p=0,y=v;p<y.length;p++){var d=y[p],E=d,g=E.cond,S=E.actions,b=n||{},x="string"==typeof t||"number"==typeof t?{type:t}:t;if(!g||g(b,x)){l=d.target,S&&(s.actions=s.actions.concat(S));break}}if(!l)return{stateValue:void 0,actions:s,activities:c};var _=r.toStatePath(l),m=this.parent,T=e,V=this.key;if(_.forEach(function(e){if(!m||!m.states)throw new Error("Unable to read '"+e+"'");if("$history"===e)if(T)e="object"==typeof T?Object.keys(T)[0]:T;else{if(!m.initial)throw new Error("Cannot read '$history' from state '"+m.id+"': missing 'initial'");e=m.initial}else 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e,n},enumerable:!0,configurable:!0}),Object.defineProperty(t.prototype,"initialStateValue",{get:function(){var t=this.__cache.initialState||(this.parallel?r.mapValues(this.states,function(t){return t.initialStateValue}):this.resolvedStateValue[this.key]);return this.__cache.initialState=t,this.__cache.initialState},enumerable:!0,configurable:!0}),Object.defineProperty(t.prototype,"initialState",{get:function(){var t=this.initialStateValue;if(!t)throw new Error("Cannot retrieve initial state from simple state '"+this.id+".'");var e=this.getStateNodes(t).reduce(function(t,e){return e.onEntry?t.concat(e.onEntry):t},[]);return new c.State(t,void 0,e)},enumerable:!0,configurable:!0}),t.prototype.getStates=function(t){var e=this;if("string"==typeof t)return[this.states[t]];var n=[];return Object.keys(t).forEach(function(i){n.push.apply(n,e.states[i].getStates(t[i]))}),n},t.prototype.getState=function(t){var e=r.toStatePath(t);try{return e.reduce(function(t,e){if(!t.states)throw new Error("Cannot retrieve subPath '"+e+"' from node with no states");return t.states[e]},this)}catch(e){throw new Error("State '"+t+" does not exist on machine '"+this.id+"'")}},Object.defineProperty(t.prototype,"events",{get:function(){if(this.__cache.events)return this.__cache.events;var t=this.states,e=new Set(this.on?Object.keys(this.on):void 0);return t&&Object.keys(t).forEach(function(n){var i=t[n];if(i.states)for(var a=0,r=i.events;a<r.length;a++){var o=r[a];e.add(""+o)}}),this.__cache.events=Array.from(e)},enumerable:!0,configurable:!0}),t.prototype.getRelativeValue=function(t){var e=t?this.__cache.relativeValue.get(t):void 0;if(e)return e;for(var n=this.initialStateValue,i=n?(s={},s[this.key]=n,s):this.key,r=this.parent;r&&r!==t;){var o=r.initialStateValue;c={},c[r.key]=r.parallel&&"object"==typeof o&&"object"==typeof i?a({},o,i):i,i=c,r=r.parent}return this.__cache.relativeValue.set(t,i),i;var s,c},t}();e.StateNode=l,e.Machine=i},function(t,e,n){"use 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a=n(0);e.default=i},function(t,e,n){n(1),t.exports=n(1)},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0}),e.STATE_DELIMITER=".",e.EMPTY_ACTIVITY_MAP={}},function(t,e,n){"use strict";function i(t,e){var n;return Object.keys(t).forEach(function(t){a.default(t,e)&&(!n||e.length>n.length)&&(n=t)}),t[n]}Object.defineProperty(e,"__esModule",{value:!0});var a=n(3);e.default=i},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var i=n(0);e.actionTypes={start:"xstate.start",stop:"xstate.stop",raise:"xstate.raise",send:"xstate.send",cancel:"xstate.cancel"};var a=function(t){return function(e){var n="string"==typeof e||"number"==typeof e?{type:e}:e;return{type:t,activity:i.getEventType(e),data:n}}},r=function(t){return"string"==typeof t||"number"==typeof t?{type:t}:t};e.raise=function(t){return{type:e.actionTypes.raise,event:t}},e.send=function(t,n){return{type:e.actionTypes.send,event:r(t),delay:n?n.delay:void 0,id:n&&void 0!==n.id?n.id:i.getEventType(t)}},e.cancel=function(t){return{type:e.actionTypes.cancel,sendId:t}},e.start=a(e.actionTypes.start),e.stop=a(e.actionTypes.stop)}])});
+!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.xstate=e():t.xstate=e()}(this,function(){return function(t){function e(i){if(n[i])return n[i].exports;var a=n[i]={i:i,l:!1,exports:{}};return t[i].call(a.exports,a,a.exports,e),a.l=!0,a.exports}var n={};return e.m=t,e.c=n,e.d=function(t,n,i){e.o(t,n)||Object.defineProperty(t,n,{configurable:!1,enumerable:!0,get:i})},e.n=function(t){var n=t&&t.__esModule?function(){return t.default}:function(){return t};return e.d(n,"a",n),n},e.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},e.p="",e(e.s=6)}([function(t,e,n){"use strict";function i(t){try{return"string"==typeof t||"number"==typeof t?""+t:t.type}catch(t){throw new Error("Events must be strings or objects with a string event.type property.")}}function a(t){try{return Array.isArray(t)?t:t.toString().split(".")}catch(e){throw new Error("'"+t+"' is not a 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i=n(7),a=n(0),r=function(){function t(t,e,n,a,r){void 0===n&&(n=[]),void 0===a&&(a=i.EMPTY_ACTIVITY_MAP),void 0===r&&(r={}),this.value=t,this.history=e,this.actions=n,this.activities=a,this.data=r}return t.from=function(e){return e instanceof t?e:new t(a.toStateValue(e))},t.inert=function(e){return e instanceof t?e.actions.length?new t(e.value,e.history,[]):e:t.from(e)},t.prototype.toString=function(){if("string"==typeof this.value)return this.value;for(var t=[],e=this.value;;){if("string"==typeof e){t.push(e);break}var n=Object.keys(e),a=n[0];if(n.slice(1).length)return;t.push(a),e=e[a]}return t.join(i.STATE_DELIMITER)},t}();e.State=r},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var i=n(1);e.matchesState=i.matchesState;var a=n(8);e.mapState=a.mapState;var r=n(4);e.StateNode=r.StateNode;var o=n(2);e.State=o.State;var s=n(9);e.Machine=s.Machine;var c=n(5);e.actions=c},function(t,e,n){"use strict";function i(t){return new f(t)}var a=this&&this.__assign||Object.assign||function(t){for(var e,n=1,i=arguments.length;n<i;n++){e=arguments[n];for(var a in e)Object.prototype.hasOwnProperty.call(e,a)&&(t[a]=e[a])}return t};Object.defineProperty(e,"__esModule",{value:!0});var r=n(0),o=n(1),s=n(2),c=n(5),u=".",f=function(){function t(e){var n=this;this.config=e,this.__cache={events:void 0,relativeValue:new Map,initialState:void 0},this.key=e.key||"(machine)",this.parent=e.parent,this.machine=this.parent?this.parent.machine:this,this.id=this.parent?this.parent.path.concat(this.key).join(u):this.key,this.path=this.parent?this.parent.path.concat(this.key):[this.key],this.initial=e.initial,this.parallel=!!e.parallel,this.states=e.states?r.mapValues(e.states,function(e,i){return new t(a({},e,{key:i,parent:n}))}):{},this.on=e.on,this.strict=!!e.strict,this.onEntry=e.onEntry?[].concat(e.onEntry):void 0,this.onExit=e.onExit?[].concat(e.onExit):void 0,this.data=e.data,this.activities=e.activities}return t.prototype.getStateNodes=function(t){var e=this,n=t instanceof s.State?t.value:r.toStateValue(t);if("string"==typeof n){var i=this.states[n].initial;return i?this.getStateNodes((o={},o[n]=i,o)):[this.states[n]]}var a=Object.keys(n);return a.map(function(t){return e.states[t]}).concat(a.map(function(t){return e.states[t].getStateNodes(n[t])}).reduce(function(t,e){return t.concat(e)}));var o},t.prototype.handles=function(t){var e=r.getEventType(t);return-1!==this.events.indexOf(e)},t.prototype.transition=function(t,e,n){if(this.strict){var i=r.getEventType(e);if(-1===this.events.indexOf(i))throw new Error("Machine '"+this.id+"' does not accept event '"+i+"'")}var a=s.State.from(t),o=this.transitionStateValue(a,e,a,n),c=this.stateTransitionToState(o,a);if(!c)return s.State.inert(a);var u,f=c,h=[];do{h.push.apply(h,f.actions),u=f,f=this.stateTransitionToState(this.transitionStateValue(u,"",f,n),u)}while(f);return u.actions=h,u},t.prototype.stateTransitionToState=function(t,e){var n=t.stateValue,i=t.actions,r=t.activities;if(n){var o=e instanceof s.State?e.activities:void 0,c=a({},o,r);return new s.State(n,s.State.from(e),i?i.onExit.concat(i.actions).concat(i.onEntry):[],c,this.getStateNodes(n).reduce(function(t,e){return void 0!==e.data&&(t[e.id]=e.data),t},{}))}},t.prototype.transitionStateValue=function(t,e,n,i){var o=this,c=t.history,u=t.value;if("string"==typeof u){if(!this.states[u])throw new Error("State '"+u+"' does not exist on machine '"+this.id+"'");var f=this.states[u];if("string"==typeof(u=f.resolvedStateValue))return f.next(e,n,c?c.value:void 0,i)}var h=[],l=r.mapValues(u,function(t,a){var r=c?c.value[a]:void 0,u=new s.State(t,r?s.State.from(r):void 0),f=o.states[a],l=f.transitionStateValue(u,e,n,i);return l.stateValue||h.push(f.next(e,n,c?c.value:void 0,i)),l});if(Array.prototype.every.call(Object.keys(l),function(t){return void 0===l[t].stateValue})){if(this.parallel)return h.length?h[0]:{stateValue:void 0,actions:{onEntry:[],onExit:[],actions:[]},activities:void 0};var v=Object.keys(l)[0],p=this.states[v].next(e,n,c?c.value:void 0,i),y=p.stateValue,d=p.actions,E=p.activities,S=l[v].actions,g=l[v].activities,b=a({},g,E);return{stateValue:y,actions:d?S?{onEntry:S.onEntry.concat(d.onEntry),actions:S.actions.concat(d.actions),onExit:S.onExit.concat(d.onExit)}:d:S,activities:b}}this.parallel&&(l=a({},r.mapValues(this.initialState.value,function(t){return{stateValue:t,actions:{onEntry:[],onExit:[],actions:[]},activities:void 0}}),l));var m={onEntry:[],actions:[],onExit:[]},V={};return{stateValue:r.mapValues(l,function(t,e){var n=t.stateValue,i=t.actions,a=t.activities;return i&&(i.onEntry&&(r=m.onEntry).push.apply(r,i.onEntry),i.actions&&(o=m.actions).push.apply(o,i.actions),i.onExit&&(s=m.onExit).push.apply(s,i.onExit)),a&&Object.assign(V,a),n||u[e];var r,o,s}),actions:m,activities:V}},t.prototype.next=function(t,e,n,i){var s=this,f=r.getEventType(t),h={onEntry:[],onExit:[],actions:[]},l={};if(this.onExit&&(h.onExit=this.onExit),this.activities&&this.activities.forEach(function(t){l[r.getEventType(t)]=!1,h.onExit=h.onExit.concat(c.stop(t))}),!this.on||!this.on[f])return{stateValue:void 0,actions:h,activities:l};var v,p=this.on[f];if("string"==typeof p)v=p;else for(var y=Array.isArray(p)?p:Object.keys(p).map(function(t){return a({},p[t],{target:t})}),d=0,E=y;d<E.length;d++){var S=E[d],g=S,b=g.cond,m=g.in,V=g.actions,_=i||{},j=c.toEventObject(t),x=!m||o.matchesState(r.toStateValue(m),r.path(this.path.slice(1,-2))(e.value));if((!b||b(_,j))&&(!m||x)){v=S.target,V&&(h.actions=h.actions.concat(V));break}}if(!v)return{stateValue:void 0,actions:h,activities:l};var w=r.toStatePath(v),O=this.parent,T=n,k=this.key;if(w.forEach(function(e){if(!O||!O.states)throw new Error("Unable to read '"+e+"'");if("$history"===e)if(0==Object.keys(O.states).length)e="";else if(T)e="object"==typeof T?Object.keys(T)[0]:T;else{if(!O.initial)throw new Error("Cannot read '$history' from state '"+O.id+"': missing 'initial'");e=O.initial}else if(""===e)return h.onExit=[],void(O=O.states[s.key]);if(""!==e&&(O=O.states[e]),void 0===O)throw new Error("Event '"+t+"' on state '"+k+"' leads to undefined state '"+w.join(u)+"'.");O.onEntry&&(h.onEntry=h.onEntry.concat(O.onEntry)),O.activities&&O.activities.forEach(function(t){l[r.getEventType(t)]=!0,h.onEntry=h.onEntry.concat(c.start(t))}),k=e,T&&(T=T[e])}),!O)throw new Error("no state");for(;O.initial;){if(!O||!O.states)throw new Error("Invalid initial state");O=O.states[O.initial],O.onEntry&&(h.onEntry=h.onEntry.concat(O.onEntry)),O.activities&&O.activities.forEach(function(t){l[r.getEventType(t)]=!0,h.onEntry=h.onEntry.concat(c.start(t))})}return{stateValue:O.getRelativeValue(this.parent),actions:h,activities:l}},Object.defineProperty(t.prototype,"resolvedStateValue",{get:function(){var t=this.key;return this.parallel?(e={},e[t]=r.mapValues(this.states,function(t){return t.resolvedStateValue[t.key]}),e):this.initial?(n={},n[t]=this.states[this.initial].resolvedStateValue,n):t;var e,n},enumerable:!0,configurable:!0}),Object.defineProperty(t.prototype,"initialStateValue",{get:function(){var t=this.__cache.initialState||(this.parallel?r.mapValues(this.states,function(t){return t.initialStateValue}):"string"==typeof this.resolvedStateValue?void 0:this.resolvedStateValue[this.key]);return this.__cache.initialState=t,this.__cache.initialState},enumerable:!0,configurable:!0}),Object.defineProperty(t.prototype,"initialState",{get:function(){var t=this.initialStateValue;if(!t)throw new Error("Cannot retrieve initial state from simple state '"+this.id+".'");var e=this.getStateNodes(t).reduce(function(t,e){return e.onEntry?t.concat(e.onEntry):t},[]);return new s.State(t,void 0,e)},enumerable:!0,configurable:!0}),t.prototype.getStates=function(t){var e=this;if("string"==typeof t)return[this.states[t]];var n=[];return Object.keys(t).forEach(function(i){n.push.apply(n,e.states[i].getStates(t[i]))}),n},t.prototype.getState=function(t){var e=r.toStatePath(t);try{return e.reduce(function(t,e){if(!t.states)throw new Error("Cannot retrieve subPath '"+e+"' from node with no states");return t.states[e]},this)}catch(e){throw new Error("State '"+t+" does not exist on machine '"+this.id+"'")}},Object.defineProperty(t.prototype,"events",{get:function(){if(this.__cache.events)return this.__cache.events;var t=this.states,e=new Set(this.on?Object.keys(this.on):void 0);return t&&Object.keys(t).forEach(function(n){var i=t[n];if(i.states)for(var a=0,r=i.events;a<r.length;a++){var o=r[a];e.add(""+o)}}),this.__cache.events=Array.from(e)},enumerable:!0,configurable:!0}),t.prototype.getRelativeValue=function(t){var e=t?this.__cache.relativeValue.get(t):void 0;if(e)return e;for(var n=this.initialStateValue,i=n?(s={},s[this.key]=n,s):this.key,r=this.parent;r&&r!==t;){var o=r.initialStateValue;c={},c[r.key]=r.parallel&&"object"==typeof o&&"object"==typeof i?a({},o,i):i,i=c,r=r.parent}return this.__cache.relativeValue.set(t,i),i;var s,c},t}();e.StateNode=f,e.Machine=i},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var i=n(0);e.actionTypes={start:"xstate.start",stop:"xstate.stop",raise:"xstate.raise",send:"xstate.send",cancel:"xstate.cancel"};var a=function(t){return function(e){var n="string"==typeof e||"number"==typeof e?{type:e}:e;return{type:t,activity:i.getEventType(e),data:n}}};e.toEventObject=function(t){return"string"==typeof t||"number"==typeof t?{type:t}:t},e.raise=function(t){return{type:e.actionTypes.raise,event:t}},e.send=function(t,n){return{type:e.actionTypes.send,event:e.toEventObject(t),delay:n?n.delay:void 0,id:n&&void 0!==n.id?n.id:i.getEventType(t)}},e.cancel=function(t){return{type:e.actionTypes.cancel,sendId:t}},e.start=a(e.actionTypes.start),e.stop=a(e.actionTypes.stop)},function(t,e,n){n(3),t.exports=n(3)},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0}),e.STATE_DELIMITER=".",e.EMPTY_ACTIVITY_MAP={}},function(t,e,n){"use strict";function i(t,e){var n;return Object.keys(t).forEach(function(t){a.matchesState(t,e)&&(!n||e.length>n.length)&&(n=t)}),t[n]}Object.defineProperty(e,"__esModule",{value:!0});var a=n(1);e.mapState=i},function(t,e,n){"use strict";function i(t){return new a.StateNode(t)}Object.defineProperty(e,"__esModule",{value:!0});var a=n(4);e.Machine=i}])});

dist/xstate.utils.js

@@ -1,1 +0,1 @@
-!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.xstateUtils=e():t.xstateUtils=e()}(this,function(){return function(t){function e(n){if(r[n])return r[n].exports;var a=r[n]={i:n,l:!1,exports:{}};return t[n].call(a.exports,a,a.exports,e),a.l=!0,a.exports}var r={};return e.m=t,e.c=r,e.d=function(t,r,n){e.o(t,r)||Object.defineProperty(t,r,{configurable:!1,enumerable:!0,get:n})},e.n=function(t){var r=t&&t.__esModule?function(){return t.default}:function(){return t};return e.d(r,"a",r),r},e.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},e.p="",e(e.s=2)}([function(t,e,r){"use strict";function n(t){var e=t.states;return Object.keys(e).reduce(function(t,r){var a=e[r],i=n(e[r]);return t.push.apply(t,[a].concat(i)),t},[])}function a(t){return"string"==typeof t?[{target:t}]:Array.isArray(t)?t:Object.keys(t).map(function(e){return p({target:e},t[e])})}function i(t,e){if(void 0===e&&(e={}),t.parallel)return Object.keys(t.states).map(function(e){return i(t.states[e])}).reduce(function(t,e){return t.concat(e)},[]);var r=t.states;e[t.key]=!0;var n=Object.keys(r).reduce(function(t,n){if(e[n])return t;var a=r[n];return t.push.apply(t,i(a,e)),e[n]=!0,t},[]);if(!t.on)return n;var o=Object.keys(t.on).reduce(function(r,n){if(!t.on||!t.parent)return r;var o=t.parent,s=t.on[n];return s?(a(s).forEach(function(a){var s=a.target,u=a.cond,c=o.getState(s),f={event:n,source:t,target:c,cond:u};r.push(f),e[s]||(r.push.apply(r,i(c,e)),e[s]=!0)}),r):r},[]);return n.concat(o)}function o(t){function e(a){var i=JSON.stringify(a);if(!r[i]){r[i]={};for(var o=0,s=n;o<s.length;o++){var u=s[o],c=t.transition(a,u);r[i][u]={state:c.value},e(c.value)}}}var r={},n=t.events;return e(t.initialState.value),r}function s(t){function e(t){var n=JSON.stringify(t);i.add(n);for(var o=r[n],s=0,u=Object.keys(o);s<u.length;s++){var c=u[s],f=o[c].state;if(f){var p=JSON.stringify(v.toTrie(f));(!a[p]||a[p].length>a[n].length+1)&&(a[p]=(a[n]||[]).concat([{state:t,event:c}]))}}for(var l=0,y=Object.keys(o);l<y.length;l++){var h=y[l],f=o[h].state;if(f){var p=JSON.stringify(f);i.has(p)||e(f)}}return a}if(!t.states)return l;var r=o(t),n=JSON.stringify(t.initialState.value),a=(s={},s[n]=[],s),i=new Set;return e(t.initialState.value),a;var s}function u(t){var e=s(t);return Object.keys(e).map(function(t){return{state:JSON.parse(t),path:e[t]}})}function c(t){function e(t,o){if(n.add(t),t===o)i[o]=i[o]||[],i[o].push(a.slice());else for(var s=0,u=Object.keys(r[t]);s<u.length;s++){var c=u[s],f=r[t][c].state;if(f){var p=JSON.stringify(f);n.has(p)||(a.push({state:JSON.parse(t),event:c}),e(p,o))}}a.pop(),n.delete(t)}if(!t.states)return l;var r=o(t),n=new Set,a=[],i={},s=JSON.stringify(t.initialState.value);return Object.keys(r).forEach(function(t){e(s,t)}),i}function f(t){var e=c(t);return Object.keys(e).map(function(t){return{state:JSON.parse(t),paths:e[t]}})}var p=this&&this.__assign||Object.assign||function(t){for(var e,r=1,n=arguments.length;r<n;r++){e=arguments[r];for(var a in e)Object.prototype.hasOwnProperty.call(e,a)&&(t[a]=e[a])}return t};Object.defineProperty(e,"__esModule",{value:!0});var v=r(1),l={};e.getNodes=n,e.getEdges=i,e.getAdjacencyMap=o,e.getShortestPaths=s,e.getShortestPathsAsArray=u,e.getSimplePaths=c,e.getSimplePathsAsArray=f},function(t,e,r){"use strict";function n(t){try{return"string"==typeof t||"number"==typeof t?""+t:t.type}catch(t){throw new Error("Events must be strings or objects with a string event.type property.")}}function a(t){try{return Array.isArray(t)?t:t.toString().split(".")}catch(e){throw new Error("'"+t+"' is not a valid state path.")}}function i(t){if(t instanceof s.State)return t.value;if("object"==typeof t&&!(t instanceof s.State))return t;var e=a(t);if(1===e.length)return e[0];for(var r={},n=r,i=0;i<e.length-1;i++)i===e.length-2?n[e[i]]=e[i+1]:(n[e[i]]={},n=n[e[i]]);return r}function o(t,e){var r={};return Object.keys(t).forEach(function(n){r[n]=e(t[n],n,t)}),r}Object.defineProperty(e,"__esModule",{value:!0});var s=r(3);e.getEventType=n,e.toStatePath=a,e.toTrie=i,e.mapValues=o},function(t,e,r){r(0),t.exports=r(0)},function(t,e,r){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var n=r(4),a=r(1),i=function(){function t(t,e,r,a,i){void 0===r&&(r=[]),void 0===a&&(a=n.EMPTY_ACTIVITY_MAP),void 0===i&&(i={}),this.value=t,this.history=e,this.actions=r,this.activities=a,this.data=i}return t.from=function(e){return e instanceof t?e:new t(a.toTrie(e))},t.inert=function(e){return e instanceof t?e.actions.length?new t(e.value,e.history,[]):e:t.from(e)},t.prototype.toString=function(){if("string"==typeof this.value)return this.value;for(var t=[],e=this.value;;){if("string"==typeof e){t.push(e);break}var r=Object.keys(e),a=r[0];if(r.slice(1).length)return;t.push(a),e=e[a]}return t.join(n.STATE_DELIMITER)},t}();e.State=i},function(t,e,r){"use strict";Object.defineProperty(e,"__esModule",{value:!0}),e.STATE_DELIMITER=".",e.EMPTY_ACTIVITY_MAP={}}])});
+!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.xstateUtils=e():t.xstateUtils=e()}(this,function(){return function(t){function e(r){if(n[r])return n[r].exports;var a=n[r]={i:r,l:!1,exports:{}};return t[r].call(a.exports,a,a.exports,e),a.l=!0,a.exports}var n={};return e.m=t,e.c=n,e.d=function(t,n,r){e.o(t,n)||Object.defineProperty(t,n,{configurable:!1,enumerable:!0,get:r})},e.n=function(t){var n=t&&t.__esModule?function(){return t.default}:function(){return t};return e.d(n,"a",n),n},e.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},e.p="",e(e.s=2)}([function(t,e,n){"use strict";function r(t){var e=t.states;return Object.keys(e).reduce(function(t,n){var a=e[n],i=r(e[n]);return t.push.apply(t,[a].concat(i)),t},[])}function a(t,e){var n=t.on[e];return"string"==typeof n?[{source:t,target:t.parent.getState(n),event:e,actions:[]}]:Array.isArray(n)?n.map(function(n){return{source:t,target:t.parent.getState(n.target),event:e,actions:n.actions||[],cond:n.cond}}):Object.keys(n).map(function(r){return{source:t,target:t.parent.getState(r),event:e,actions:n[r].actions||[],cond:n[r].cond}})}function i(t){var e=[];return t.states&&Object.keys(t.states).forEach(function(n){e.push.apply(e,i(t.states[n]))}),t.on&&Object.keys(t.on).forEach(function(n){e.push.apply(e,a(t,n))}),e}function o(t){function e(a){var i=JSON.stringify(a);if(!n[i]){n[i]={};for(var o=0,s=r;o<s.length;o++){var u=s[o],c=t.transition(a,u);n[i][u]={state:c.value},e(c.value)}}}var n={},r=t.events;return e(t.initialState.value),n}function s(t){function e(t){var r=JSON.stringify(t);i.add(r);for(var o=n[r],s=0,u=Object.keys(o);s<u.length;s++){var c=u[s],f=o[c].state;if(f){var l=JSON.stringify(p.toStateValue(f));(!a[l]||a[l].length>a[r].length+1)&&(a[l]=(a[r]||[]).concat([{state:t,event:c}]))}}for(var v=0,y=Object.keys(o);v<y.length;v++){var h=y[v],f=o[h].state;if(f){var l=JSON.stringify(f);i.has(l)||e(f)}}return a}if(!t.states)return l;var n=o(t),r=JSON.stringify(t.initialState.value),a=(s={},s[r]=[],s),i=new Set;return e(t.initialState.value),a;var s}function u(t){var e=s(t);return Object.keys(e).map(function(t){return{state:JSON.parse(t),path:e[t]}})}function c(t){function e(t,o){if(r.add(t),t===o)i[o]=i[o]||[],i[o].push(a.slice());else for(var s=0,u=Object.keys(n[t]);s<u.length;s++){var c=u[s],f=n[t][c].state;if(f){var p=JSON.stringify(f);r.has(p)||(a.push({state:JSON.parse(t),event:c}),e(p,o))}}a.pop(),r.delete(t)}if(!t.states)return l;var n=o(t),r=new Set,a=[],i={},s=JSON.stringify(t.initialState.value);return Object.keys(n).forEach(function(t){e(s,t)}),i}function f(t){var e=c(t);return Object.keys(e).map(function(t){return{state:JSON.parse(t),paths:e[t]}})}Object.defineProperty(e,"__esModule",{value:!0});var p=n(1),l={};e.getNodes=r,e.getEdges=i,e.getAdjacencyMap=o,e.getShortestPaths=s,e.getShortestPathsAsArray=u,e.getSimplePaths=c,e.getSimplePathsAsArray=f},function(t,e,n){"use strict";function r(t){try{return"string"==typeof t||"number"==typeof t?""+t:t.type}catch(t){throw new Error("Events must be strings or objects with a string event.type property.")}}function a(t){try{return Array.isArray(t)?t:t.toString().split(".")}catch(e){throw new Error("'"+t+"' is not a valid state path.")}}function i(t){if(t instanceof s.State)return t.value;if("object"==typeof t&&!(t instanceof s.State))return t;var e=a(t);if(1===e.length)return e[0];for(var n={},r=n,i=0;i<e.length-1;i++)i===e.length-2?r[e[i]]=e[i+1]:(r[e[i]]={},r=r[e[i]]);return n}function o(t,e){var n={};return Object.keys(t).forEach(function(r){n[r]=e(t[r],r,t)}),n}Object.defineProperty(e,"__esModule",{value:!0});var s=n(3);e.getEventType=r,e.toStatePath=a,e.toStateValue=i,e.mapValues=o,e.path=function(t){return function(e){for(var n=e,r=0,a=t;r<a.length;r++){n=n[a[r]]}return n}}},function(t,e,n){n(0),t.exports=n(0)},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(4),a=n(1),i=function(){function t(t,e,n,a,i){void 0===n&&(n=[]),void 0===a&&(a=r.EMPTY_ACTIVITY_MAP),void 0===i&&(i={}),this.value=t,this.history=e,this.actions=n,this.activities=a,this.data=i}return t.from=function(e){return e instanceof t?e:new t(a.toStateValue(e))},t.inert=function(e){return e instanceof t?e.actions.length?new t(e.value,e.history,[]):e:t.from(e)},t.prototype.toString=function(){if("string"==typeof this.value)return this.value;for(var t=[],e=this.value;;){if("string"==typeof e){t.push(e);break}var n=Object.keys(e),a=n[0];if(n.slice(1).length)return;t.push(a),e=e[a]}return t.join(r.STATE_DELIMITER)},t}();e.State=i},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0}),e.STATE_DELIMITER=".",e.EMPTY_ACTIVITY_MAP={}}])});

lib/actions.d.ts

@@ -1,2 +0,2 @@
-import { ActionObject, Action, ActionType, Event, EventObject } from './types';
+import { Action, Event, EventObject, ActivityAction, SendAction, SendActionOptions, CancelAction } from './types';
 export declare const actionTypes: {
@@ -9,24 +9,7 @@ start: string;
 };
-export interface ActivityAction extends ActionObject {
-    activity: ActionType;
-    data: {
-        type: ActionType;
-        [key: string]: any;
-    };
-}
+export declare const toEventObject: (event: Event) => EventObject;
 export declare const raise: (eventType: string | number) => EventObject;
-export interface SendAction extends ActionObject {
-    event: EventObject;
-    delay?: number;
-}
-export interface SendActionOptions {
-    delay?: number;
-    id?: string | number;
-}
 export declare const send: (event: Event, options?: SendActionOptions | undefined) => SendAction;
-export interface CancelAction extends ActionObject {
-    sendId: string | number;
-}
 export declare const cancel: (sendId: string | number) => CancelAction;
 export declare const start: (activity: Action) => ActivityAction;
 export declare const stop: (activity: Action) => ActivityAction;

lib/actions.js

@@ -23,3 +23,3 @@ "use strict";
 }; };
-var toEventObject = function (event) {
+exports.toEventObject = function (event) {
     if (typeof event === 'string' || typeof event === 'number') {
@@ -37,3 +37,3 @@ return { type: event };
         type: exports.actionTypes.send,
-        event: toEventObject(event),
+        event: exports.toEventObject(event),
         delay: options ? options.delay : undefined,
@@ -40,0 +40,0 @@ id: options && options.id !== undefined ? options.id : utils_1.getEventType(event)

lib/graph.d.ts

 import { StateNode } from './index';
-import { StateValue, Machine, Event, Condition, Action } from './types';
-export interface Edge {
-    event: string;
-    source: StateNode;
-    target: StateNode;
-    cond?: Condition;
-    actions: Action[];
-}
-export interface INodesAndEdges {
-    nodes: StateNode[];
-    edges: Edge[];
-}
+import { Machine, Edge, PathMap, PathItem, PathsItem, PathsMap, AdjacencyMap } from './types';
 export declare function getNodes(node: StateNode): StateNode[];
 export declare function getEdges(node: StateNode): Edge[];
-export interface Segment {
-    state: StateValue;
-    event: Event;
-}
-export interface IPathMap {
-    [key: string]: Segment[];
-}
-export interface IPathItem {
-    state: StateValue;
-    path: Segment[];
-}
-export interface IPathsItem {
-    state: StateValue;
-    paths: Segment[][];
-}
-export interface IPathsMap {
-    [key: string]: Segment[][];
-}
-export interface ITransitionMap {
-    state: StateValue | undefined;
-}
-export interface IAdjacencyMap {
-    [stateId: string]: Record<string, ITransitionMap>;
-}
-export declare function getAdjacencyMap(node: Machine): IAdjacencyMap;
-export declare function getShortestPaths(machine: Machine): IPathMap;
-export declare function getShortestPathsAsArray(machine: Machine): IPathItem[];
-export declare function getSimplePaths(machine: Machine): IPathsMap;
-export declare function getSimplePathsAsArray(machine: Machine): IPathsItem[];
+export declare function getAdjacencyMap(node: Machine): AdjacencyMap;
+export declare function getShortestPaths(machine: Machine): PathMap;
+export declare function getShortestPathsAsArray(machine: Machine): PathItem[];
+export declare function getSimplePaths(machine: Machine): PathsMap;
+export declare function getSimplePathsAsArray(machine: Machine): PathsItem[];

lib/graph.js

@@ -104,3 +104,3 @@ "use strict";
             }
-            var nextStateId = JSON.stringify(utils_1.toTrie(nextStateValue));
+            var nextStateId = JSON.stringify(utils_1.toStateValue(nextStateValue));
             if (!pathMap[nextStateId] ||
@@ -107,0 +107,0 @@ pathMap[nextStateId].length > pathMap[stateId].length + 1) {

lib/index.d.ts

@@ -1,43 +0,7 @@
-import { Event, StateValue, Transition, Action, StandardMachine, ParallelMachine, SimpleOrCompoundStateNodeConfig, MachineConfig, ParallelMachineConfig, EventType, StandardMachineConfig, StateNodeConfig, Activity } from './types';
-import matchesState from './matchesState';
-import mapState from './mapState';
+import { matchesState } from './matchesState';
+import { mapState } from './mapState';
+import { StateNode } from './StateNode';
 import { State } from './State';
-declare class StateNode implements StateNodeConfig {
-    config: SimpleOrCompoundStateNodeConfig | StandardMachineConfig | ParallelMachineConfig;
-    key: string;
-    id: string;
-    relativeId: string;
-    initial?: string;
-    parallel?: boolean;
-    states: Record<string, StateNode>;
-    on?: Record<string, Transition | undefined>;
-    onEntry?: Action[];
-    onExit?: Action[];
-    activities?: Activity[];
-    strict: boolean;
-    parent?: StateNode;
-    machine: StateNode;
-    data: object | undefined;
-    private __cache;
-    constructor(config: SimpleOrCompoundStateNodeConfig | StandardMachineConfig | ParallelMachineConfig);
-    getStateNodes(state: StateValue | State): StateNode[];
-    handles(event: Event): boolean;
-    transition(state: StateValue | State, event: Event, extendedState?: any): State;
-    private stateTransitionToState(stateTransition, prevState);
-    private transitionStateValue(state, event, extendedState?);
-    private next(event, history?, extendedState?);
-    private readonly resolvedStateValue;
-    private readonly initialStateValue;
-    readonly initialState: State;
-    getStates(stateValue: StateValue): StateNode[];
-    getState(relativeStateId: string | string[]): StateNode | undefined;
-    readonly events: EventType[];
-    private getRelativeValue(toNode?);
-}
-export interface MachineFactory {
-    (config: MachineConfig | ParallelMachineConfig): StandardMachine | ParallelMachine;
-    standard: (config: MachineConfig) => StandardMachine;
-    parallel: (config: ParallelMachineConfig) => ParallelMachine;
-}
-export declare function Machine(config: MachineConfig | ParallelMachineConfig): StandardMachine | ParallelMachine;
-export { StateNode, State, matchesState, mapState };
+import { Machine } from './Machine';
+import * as actions from './actions';
+export { Machine, StateNode, State, matchesState, mapState, actions };

lib/index.js

 "use strict";
-var __assign = (this && this.__assign) || Object.assign || function(t) {
-    for (var s, i = 1, n = arguments.length; i < n; i++) {
-        s = arguments[i];
-        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
-            t[p] = s[p];
-    }
-    return t;
-};
 Object.defineProperty(exports, "__esModule", { value: true });
-var utils_1 = require("./utils");
 var matchesState_1 = require("./matchesState");
-exports.matchesState = matchesState_1.default;
+exports.matchesState = matchesState_1.matchesState;
 var mapState_1 = require("./mapState");
-exports.mapState = mapState_1.default;
+exports.mapState = mapState_1.mapState;
+var StateNode_1 = require("./StateNode");
+exports.StateNode = StateNode_1.StateNode;
 var State_1 = require("./State");
 exports.State = State_1.State;
-var actions_1 = require("./actions");
-var STATE_DELIMITER = '.';
-var HISTORY_KEY = '$history';
-var NULL_EVENT = '';
-var StateNode = /** @class */ (function () {
-    function StateNode(config) {
-        var _this = this;
-        this.config = config;
-        this.__cache = {
-            events: undefined,
-            relativeValue: new Map(),
-            initialState: undefined
-        };
-        this.key = config.key || '(machine)';
-        this.parent = config.parent;
-        this.machine = this.parent ? this.parent.machine : this;
-        this.id = this.parent
-            ? this.parent.id + STATE_DELIMITER + this.key
-            : this.key;
-        this.relativeId =
-            this.parent && this.parent.parent
-                ? this.parent.relativeId + STATE_DELIMITER + this.key
-                : this.key;
-        this.initial = config.initial;
-        this.parallel = !!config.parallel;
-        this.states = (config.states
-            ? utils_1.mapValues(config.states, function (stateConfig, key) {
-                return new StateNode(__assign({}, stateConfig, { key: key, parent: _this }));
-            })
-            : {});
-        this.on = config.on;
-        this.strict = !!config.strict;
-        this.onEntry = config.onEntry
-            ? [].concat(config.onEntry)
-            : undefined;
-        this.onExit = config.onExit
-            ? [].concat(config.onExit)
-            : undefined;
-        this.data = config.data;
-        this.activities = config.activities;
-    }
-    StateNode.prototype.getStateNodes = function (state) {
-        var _this = this;
-        var stateValue = state instanceof State_1.State ? state.value : utils_1.toTrie(state);
-        if (typeof stateValue === 'string') {
-            var initialStateValue = this.states[stateValue].initial;
-            return initialStateValue
-                ? this.getStateNodes((_a = {}, _a[stateValue] = initialStateValue, _a))
-                : [this.states[stateValue]];
-        }
-        var subStateKeys = Object.keys(stateValue);
-        var subStateNodes = subStateKeys.map(function (subStateKey) { return _this.states[subStateKey]; });
-        return subStateNodes.concat(subStateKeys
-            .map(function (subStateKey) {
-            return _this.states[subStateKey].getStateNodes(stateValue[subStateKey]);
-        })
-            .reduce(function (a, b) { return a.concat(b); }));
-        var _a;
-    };
-    StateNode.prototype.handles = function (event) {
-        var eventType = utils_1.getEventType(event);
-        if (this.on) {
-            return eventType in this.on;
-        }
-        return false;
-    };
-    StateNode.prototype.transition = function (state, event, extendedState) {
-        if (this.strict) {
-            var eventType = utils_1.getEventType(event);
-            if (this.events.indexOf(eventType) === -1) {
-                throw new Error("Machine '" + this.id + "' does not accept event '" + eventType + "'");
-            }
-        }
-        var stateTransition = this.transitionStateValue(state, event, extendedState);
-        var nextState = this.stateTransitionToState(stateTransition, state);
-        if (!nextState) {
-            return State_1.State.inert(state);
-        }
-        // Try transitioning from "transient" states from the NULL_EVENT
-        // until a state with non-transient transitions is found
-        var maybeNextState = nextState;
-        var nextStateFromInternalTransition;
-        do {
-            nextStateFromInternalTransition = maybeNextState;
-            maybeNextState = this.stateTransitionToState(this.transitionStateValue(nextStateFromInternalTransition, NULL_EVENT, extendedState), nextStateFromInternalTransition);
-        } while (maybeNextState);
-        // TODO: handle internally raised events
-        return nextStateFromInternalTransition;
-    };
-    StateNode.prototype.stateTransitionToState = function (stateTransition, prevState) {
-        var nextStateValue = stateTransition.stateValue, nextActions = stateTransition.actions, nextActivities = stateTransition.activities;
-        if (!nextStateValue) {
-            return undefined;
-        }
-        var prevActivities = prevState instanceof State_1.State ? prevState.activities : undefined;
-        var activities = __assign({}, prevActivities, nextActivities);
-        return new State_1.State(
-        // next state value
-        nextStateValue, 
-        // history
-        State_1.State.from(prevState), 
-        // effects
-        nextActions
-            ? nextActions.onExit
-                .concat(nextActions.actions)
-                .concat(nextActions.onEntry)
-            : [], 
-        // activities
-        activities, 
-        // data
-        this.getStateNodes(nextStateValue).reduce(function (data, stateNode) {
-            data[stateNode.id] = stateNode.data;
-            return data;
-        }, {}));
-    };
-    StateNode.prototype.transitionStateValue = function (state, event, extendedState) {
-        var _this = this;
-        var history = state instanceof State_1.State ? state.history : undefined;
-        var stateValue = utils_1.toTrie(state);
-        if (typeof stateValue === 'string') {
-            if (!this.states[stateValue]) {
-                throw new Error("State '" + stateValue + "' does not exist on machine '" + this.id + "'");
-            }
-            var subStateNode = this.states[stateValue];
-            if (subStateNode.states && subStateNode.initial) {
-                // Get the initial state value
-                var initialStateValue = subStateNode.initialState.value;
-                stateValue = (_a = {}, _a[stateValue] = initialStateValue, _a);
-            }
-            else {
-                // Transition from the substate
-                return subStateNode.next(event, history ? history.value : undefined, extendedState);
-            }
-        }
-        // Potential transition tuples from parent state nodes
-        var potentialStateTransitions = [];
-        var nextStateValue = utils_1.mapValues(stateValue, function (subStateValue, subStateKey) {
-            var subHistory = history ? history.value[subStateKey] : undefined;
-            var subState = new State_1.State(subStateValue, subHistory ? State_1.State.from(subHistory) : undefined);
-            var subStateNode = _this.states[subStateKey];
-            var subStateTransition = subStateNode.transitionStateValue(subState, event, extendedState);
-            if (!subStateTransition.stateValue) {
-                potentialStateTransitions.push(subStateNode.next(event, history ? history.value : undefined, extendedState));
-            }
-            return subStateTransition;
-        });
-        if (Array.prototype.every.call(Object.keys(nextStateValue), function (key) {
-            return nextStateValue[key].stateValue === undefined;
-        })) {
-            if (this.parallel) {
-                if (potentialStateTransitions.length) {
-                    return potentialStateTransitions[0];
-                }
-                return {
-                    stateValue: undefined,
-                    actions: { onEntry: [], onExit: [], actions: [] },
-                    activities: undefined
-                };
-            }
-            var subStateKey = Object.keys(nextStateValue)[0];
-            // try with parent
-            var _b = this.states[subStateKey].next(event, history ? history.value : undefined, extendedState), parentNextValue = _b.stateValue, parentNextActions = _b.actions, parentActivities = _b.activities;
-            var nextActions = nextStateValue[subStateKey].actions;
-            var activities = nextStateValue[subStateKey].activities;
-            var allActivities = __assign({}, activities, parentActivities);
-            var allActions = parentNextActions
-                ? nextActions
-                    ? {
-                        onEntry: nextActions.onEntry.concat(parentNextActions.onEntry),
-                        actions: nextActions.actions.concat(parentNextActions.actions),
-                        onExit: nextActions.onExit.concat(parentNextActions.onExit)
-                    }
-                    : parentNextActions
-                : nextActions;
-            return {
-                stateValue: parentNextValue,
-                actions: allActions,
-                activities: allActivities
-            };
-        }
-        if (this.parallel) {
-            nextStateValue = __assign({}, utils_1.mapValues(this.initialState.value, function (subStateValue) { return ({
-                stateValue: subStateValue,
-                actions: { onEntry: [], onExit: [], actions: [] },
-                activities: undefined
-            }); }), nextStateValue);
-        }
-        var finalActions = {
-            onEntry: [],
-            actions: [],
-            onExit: []
-        };
-        var finalActivities = {};
-        var finalStateValue = utils_1.mapValues(nextStateValue, function (subStateTransition, key) {
-            var nextSubStateValue = subStateTransition.stateValue, nextSubActions = subStateTransition.actions, nextSubActivities = subStateTransition.activities;
-            if (nextSubActions) {
-                if (nextSubActions.onEntry) {
-                    (_a = finalActions.onEntry).push.apply(_a, nextSubActions.onEntry);
-                }
-                if (nextSubActions.actions) {
-                    (_b = finalActions.actions).push.apply(_b, nextSubActions.actions);
-                }
-                if (nextSubActions.onExit) {
-                    (_c = finalActions.onExit).push.apply(_c, nextSubActions.onExit);
-                }
-            }
-            if (nextSubActivities) {
-                Object.assign(finalActivities, nextSubActivities);
-            }
-            if (!nextSubStateValue) {
-                return stateValue[key];
-            }
-            return nextSubStateValue;
-            var _a, _b, _c;
-        });
-        return {
-            stateValue: finalStateValue,
-            actions: finalActions,
-            activities: finalActivities
-        };
-        var _a;
-    };
-    StateNode.prototype.next = function (event, history, extendedState) {
-        var _this = this;
-        var eventType = utils_1.getEventType(event);
-        var actionMap = { onEntry: [], onExit: [], actions: [] };
-        var activityMap = {};
-        if (this.onExit) {
-            actionMap.onExit = this.onExit;
-        }
-        if (this.activities) {
-            this.activities.forEach(function (activity) {
-                activityMap[utils_1.getEventType(activity)] = false;
-                actionMap.onExit = actionMap.onExit.concat(actions_1.stop(activity));
-            });
-        }
-        if (!this.on || !this.on[eventType]) {
-            return {
-                stateValue: undefined,
-                actions: actionMap,
-                activities: activityMap
-            };
-        }
-        var transition = this.on[eventType];
-        var nextStateString;
-        if (typeof transition === 'string') {
-            nextStateString = transition;
-        }
-        else {
-            var candidates = Array.isArray(transition)
-                ? transition
-                : Object.keys(transition).map(function (key) { return (__assign({}, transition[key], { target: key })); });
-            for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
-                var candidate = candidates_1[_i];
-                var _a = candidate, cond = _a.cond, transitionActions = _a.actions;
-                var extendedStateObject = extendedState || {};
-                var eventObject = typeof event === 'string' || typeof event === 'number'
-                    ? { type: event }
-                    : event;
-                if (!cond || cond(extendedStateObject, eventObject)) {
-                    nextStateString = candidate.target;
-                    if (transitionActions) {
-                        actionMap.actions = actionMap.actions.concat(transitionActions);
-                    }
-                    break;
-                }
-            }
-        }
-        if (!nextStateString) {
-            return {
-                stateValue: undefined,
-                actions: actionMap,
-                activities: activityMap
-            };
-        }
-        var nextStatePath = utils_1.toStatePath(nextStateString);
-        var currentState = this.parent;
-        var currentHistory = history;
-        var currentPath = this.key;
-        nextStatePath.forEach(function (subPath) {
-            if (!currentState || !currentState.states) {
-                throw new Error("Unable to read '" + subPath + "'");
-            }
-            if (subPath === HISTORY_KEY) {
-                if (currentHistory) {
-                    subPath =
-                        typeof currentHistory === 'object'
-                            ? Object.keys(currentHistory)[0]
-                            : currentHistory;
-                }
-                else if (currentState.initial) {
-                    subPath = currentState.initial;
-                }
-                else {
-                    throw new Error("Cannot read '" + HISTORY_KEY + "' from state '" + currentState.id + "': missing 'initial'");
-                }
-            }
-            else if (subPath === NULL_EVENT) {
-                actionMap.onExit = [];
-                currentState = currentState.states[_this.key];
-                return;
-            }
-            currentState = currentState.states[subPath];
-            if (currentState === undefined) {
-                throw new Error("Event '" + event + "' on state '" + currentPath + "' leads to undefined state '" + nextStatePath.join(STATE_DELIMITER) + "'.");
-            }
-            if (currentState.onEntry) {
-                actionMap.onEntry = actionMap.onEntry.concat(currentState.onEntry);
-            }
-            if (currentState.activities) {
-                currentState.activities.forEach(function (activity) {
-                    activityMap[utils_1.getEventType(activity)] = true;
-                    actionMap.onEntry = actionMap.onEntry.concat(actions_1.start(activity));
-                });
-            }
-            currentPath = subPath;
-            if (currentHistory) {
-                currentHistory = currentHistory[subPath];
-            }
-        });
-        if (!currentState) {
-            throw new Error('no state');
-        }
-        while (currentState.initial) {
-            if (!currentState || !currentState.states) {
-                throw new Error("Invalid initial state");
-            }
-            currentState = currentState.states[currentState.initial];
-            if (currentState.onEntry) {
-                actionMap.onEntry = actionMap.onEntry.concat(currentState.onEntry);
-            }
-            if (currentState.activities) {
-                currentState.activities.forEach(function (activity) {
-                    activityMap[utils_1.getEventType(activity)] = true;
-                    actionMap.onEntry = actionMap.onEntry.concat(actions_1.start(activity));
-                });
-            }
-        }
-        return {
-            stateValue: currentState.getRelativeValue(this.parent),
-            actions: actionMap,
-            activities: activityMap
-        };
-    };
-    Object.defineProperty(StateNode.prototype, "resolvedStateValue", {
-        get: function () {
-            var key = this.key;
-            if (this.parallel) {
-                return _a = {},
-                    _a[key] = utils_1.mapValues(this.states, function (stateNode) { return stateNode.resolvedStateValue[stateNode.key]; }),
-                    _a;
-            }
-            if (!this.initial) {
-                // If leaf node, value is just the state node's key
-                return key;
-            }
-            return _b = {},
-                _b[key] = this.states[this.initial].resolvedStateValue,
-                _b;
-            var _a, _b;
-        },
-        enumerable: true,
-        configurable: true
-    });
-    Object.defineProperty(StateNode.prototype, "initialStateValue", {
-        get: function () {
-            var initialStateValue = this.__cache.initialState ||
-                (this.parallel
-                    ? utils_1.mapValues(this.states, function (state) { return state.initialStateValue; })
-                    : this.resolvedStateValue[this.key]);
-            this.__cache.initialState = initialStateValue;
-            return this.__cache.initialState;
-        },
-        enumerable: true,
-        configurable: true
-    });
-    Object.defineProperty(StateNode.prototype, "initialState", {
-        get: function () {
-            var initialStateValue = this.initialStateValue;
-            if (!initialStateValue) {
-                throw new Error("Cannot retrieve initial state from simple state '" + this.id + ".'");
-            }
-            var entryActions = this.getStateNodes(initialStateValue).reduce(function (actions, stateNode) {
-                return stateNode.onEntry ? actions.concat(stateNode.onEntry) : actions;
-            }, []);
-            return new State_1.State(initialStateValue, undefined, entryActions);
-        },
-        enumerable: true,
-        configurable: true
-    });
-    StateNode.prototype.getStates = function (stateValue) {
-        var _this = this;
-        if (typeof stateValue === 'string') {
-            return [this.states[stateValue]];
-        }
-        var stateNodes = [];
-        Object.keys(stateValue).forEach(function (key) {
-            stateNodes.push.apply(stateNodes, _this.states[key].getStates(stateValue[key]));
-        });
-        return stateNodes;
-    };
-    StateNode.prototype.getState = function (relativeStateId) {
-        var statePath = utils_1.toStatePath(relativeStateId);
-        try {
-            return statePath.reduce(function (subState, subPath) {
-                if (!subState.states) {
-                    throw new Error("Cannot retrieve subPath '" + subPath + "' from node with no states");
-                }
-                return subState.states[subPath];
-            }, this);
-        }
-        catch (e) {
-            throw new Error("State '" + relativeStateId + " does not exist on machine '" + this.id + "'");
-        }
-    };
-    Object.defineProperty(StateNode.prototype, "events", {
-        get: function () {
-            if (this.__cache.events) {
-                return this.__cache.events;
-            }
-            var states = this.states;
-            var events = new Set(this.on ? Object.keys(this.on) : undefined);
-            if (states) {
-                Object.keys(states).forEach(function (stateId) {
-                    var state = states[stateId];
-                    if (state.states) {
-                        for (var _i = 0, _a = state.events; _i < _a.length; _i++) {
-                            var event_1 = _a[_i];
-                            events.add("" + event_1);
-                        }
-                    }
-                });
-            }
-            return (this.__cache.events = Array.from(events));
-        },
-        enumerable: true,
-        configurable: true
-    });
-    StateNode.prototype.getRelativeValue = function (toNode) {
-        var memoizedRelativeValue = toNode
-            ? this.__cache.relativeValue.get(toNode)
-            : undefined;
-        if (memoizedRelativeValue) {
-            return memoizedRelativeValue;
-        }
-        var initialStateValue = this.initialStateValue;
-        var relativeValue = initialStateValue
-            ? (_a = {},
-                _a[this.key] = initialStateValue,
-                _a) : this.key;
-        var currentNode = this.parent;
-        while (currentNode && currentNode !== toNode) {
-            var currentInitialState = currentNode.initialStateValue;
-            relativeValue = (_b = {},
-                _b[currentNode.key] = currentNode.parallel &&
-                    typeof currentInitialState === 'object' &&
-                    typeof relativeValue === 'object'
-                    ? __assign({}, currentInitialState, relativeValue) : relativeValue,
-                _b);
-            currentNode = currentNode.parent;
-        }
-        this.__cache.relativeValue.set(toNode, relativeValue);
-        return relativeValue;
-        var _a, _b;
-    };
-    return StateNode;
-}());
-exports.StateNode = StateNode;
-function Machine(config) {
-    return new StateNode(config);
-}
-exports.Machine = Machine;
+var Machine_1 = require("./Machine");
+exports.Machine = Machine_1.Machine;
+var actions = require("./actions");
+exports.actions = actions;

lib/mapState.d.ts

@@ -1,3 +0,3 @@
-export default function mapState(stateMap: {
+export declare function mapState(stateMap: {
     [stateId: string]: any;
 }, stateId: string): any;

lib/mapState.js

@@ -7,3 +7,3 @@ "use strict";
     Object.keys(stateMap).forEach(function (mappedStateId) {
-        if (matchesState_1.default(mappedStateId, stateId) &&
+        if (matchesState_1.matchesState(mappedStateId, stateId) &&
             (!foundStateId || stateId.length > foundStateId.length)) {
@@ -15,2 +15,2 @@ foundStateId = mappedStateId;
 }
-exports.default = mapState;
+exports.mapState = mapState;

lib/matchesState.d.ts

 import { StateValue } from './types';
-export default function matchesState(parentStateId: StateValue, childStateId: StateValue): boolean;
+export declare function matchesState(parentStateId: StateValue, childStateId: StateValue): boolean;

lib/matchesState.js

@@ -5,4 +5,4 @@ "use strict";
 function matchesState(parentStateId, childStateId) {
-    var parentStateValue = utils_1.toTrie(parentStateId);
-    var childStateValue = utils_1.toTrie(childStateId);
+    var parentStateValue = utils_1.toStateValue(parentStateId);
+    var childStateValue = utils_1.toStateValue(childStateId);
     if (typeof childStateValue === 'string') {
@@ -24,2 +24,2 @@ if (typeof parentStateValue === 'string') {
 }
-exports.default = matchesState;
+exports.matchesState = matchesState;

lib/scxml.d.ts

 import { Machine } from './types';
 export declare function fromMachine(machine: Machine): string;
+export declare function toMachine(xml: string): any;

lib/scxml.js

@@ -12,42 +12,4 @@ "use strict";
 var xml_js_1 = require("xml-js");
-var xstate = require("./index");
 var utils_1 = require("./utils");
-var pedestrianStates = {
-    initial: 'walk',
-    states: {
-        walk: {
-            on: {
-                PED_COUNTDOWN: 'wait'
-            }
-        },
-        wait: {
-            on: {
-                PED_COUNTDOWN: 'stop'
-            }
-        },
-        stop: {}
-    }
-};
-var lightMachine = xstate.Machine({
-    key: 'light',
-    initial: 'green',
-    states: {
-        green: {
-            on: {
-                TIMER: 'yellow',
-                POWER_OUTAGE: 'red'
-            }
-        },
-        yellow: {
-            on: {
-                TIMER: 'red',
-                POWER_OUTAGE: 'red'
-            }
-        },
-        red: __assign({ on: {
-                TIMER: 'green',
-                POWER_OUTAGE: 'red'
-            } }, pedestrianStates)
-    }
-});
+var actions = require("./actions");
 function stateNodeToSCXML(stateNode) {
@@ -186,2 +148,70 @@ var parallel = stateNode.parallel;
 exports.fromMachine = fromMachine;
-console.log(fromMachine(lightMachine));
+function indexedRecord(items, identifier) {
+    var record = {};
+    var identifierFn = typeof identifier === 'string' ? function (item) { return item[identifier]; } : identifier;
+    items.forEach(function (item) {
+        record[identifierFn(item)] = item;
+    });
+    return record;
+}
+function executableContent(elements) {
+    var transition = {
+        actions: []
+    };
+    elements.forEach(function (element) {
+        switch (element.name) {
+            case 'raise':
+                transition.actions.push(actions.raise(element.attributes.event));
+            default:
+                return;
+        }
+    });
+    return transition;
+}
+function toConfig(nodeJson) {
+    var initial = nodeJson.attributes.initial;
+    var states;
+    var on;
+    if (nodeJson.elements) {
+        var stateElements = nodeJson.elements.filter(function (element) { return element.name === 'state'; });
+        var transitionElements = nodeJson.elements.filter(function (element) { return element.name === 'transition'; });
+        var onEntryElement = nodeJson.elements.find(function (element) { return element.name === 'onentry'; });
+        var onExitElement = nodeJson.elements.find(function (element) { return element.name === 'onexit'; });
+        states = indexedRecord(stateElements, function (item) { return "" + item.attributes.id; });
+        on = utils_1.mapValues(indexedRecord(transitionElements, function (item) { return item.attributes.event || ''; }), function (value) {
+            return [
+                __assign({ target: value.attributes.target }, value.elements ? executableContent(value.elements) : undefined)
+            ];
+        });
+        var onEntry = onEntryElement
+            ? onEntryElement.elements.map(function (element) {
+                switch (element.name) {
+                    case 'raise':
+                        return actions.raise(element.attributes.event);
+                    default:
+                        return 'not-implemented';
+                }
+            })
+            : undefined;
+        var onExit = onExitElement
+            ? onExitElement.elements.map(function (element) {
+                switch (element.name) {
+                    case 'raise':
+                        return actions.raise(element.attributes.event);
+                    default:
+                        return 'not-implemented';
+                }
+            })
+            : undefined;
+        return __assign({}, initial ? { initial: initial } : undefined, stateElements.length
+            ? { states: utils_1.mapValues(states, toConfig) }
+            : undefined, transitionElements.length ? { on: on } : undefined, onEntry ? { onEntry: onEntry } : undefined, onExit ? { onExit: onExit } : undefined);
+    }
+    return {};
+}
+function toMachine(xml) {
+    var json = xml_js_1.xml2js(xml);
+    var machineElement = json.elements.filter(function (element) { return element.name === 'scxml'; })[0];
+    return toConfig(machineElement);
+}
+exports.toMachine = toMachine;

lib/State.js

@@ -20,3 +20,3 @@ "use strict";
         }
-        return new State(utils_1.toTrie(stateValue));
+        return new State(utils_1.toStateValue(stateValue));
     };
@@ -23,0 +23,0 @@ State.inert = function (stateValue) {

lib/types.d.ts

@@ -1,2 +0,2 @@
-import { StateNode } from './index';
+import { StateNode } from './StateNode';
 import { State } from './State';
@@ -25,2 +25,3 @@ export declare type EventType = string | number;
     actions?: Action[];
+    in?: StateValue;
 }
@@ -77,3 +78,2 @@ export interface TargetTransitionConfig extends TransitionConfig {
     id: string;
-    relativeId: string;
     initial: string | undefined;
@@ -102,3 +102,2 @@ parallel: boolean;
     states: Record<string, StateNode>;
-    on: never;
     onEntry: never;
@@ -134,1 +133,55 @@ onExit: never;
 }
+export interface ActivityAction extends ActionObject {
+    activity: ActionType;
+    data: {
+        type: ActionType;
+        [key: string]: any;
+    };
+}
+export interface SendAction extends ActionObject {
+    event: EventObject;
+    delay?: number;
+    id: string | number;
+}
+export interface SendActionOptions {
+    delay?: number;
+    id?: string | number;
+}
+export interface CancelAction extends ActionObject {
+    sendId: string | number;
+}
+export interface Edge {
+    event: string;
+    source: StateNode;
+    target: StateNode;
+    cond?: Condition;
+    actions: Action[];
+}
+export interface NodesAndEdges {
+    nodes: StateNode[];
+    edges: Edge[];
+}
+export interface Segment {
+    state: StateValue;
+    event: Event;
+}
+export interface PathMap {
+    [key: string]: Segment[];
+}
+export interface PathItem {
+    state: StateValue;
+    path: Segment[];
+}
+export interface PathsItem {
+    state: StateValue;
+    paths: Segment[][];
+}
+export interface PathsMap {
+    [key: string]: Segment[][];
+}
+export interface TransitionMap {
+    state: StateValue | undefined;
+}
+export interface AdjacencyMap {
+    [stateId: string]: Record<string, TransitionMap>;
+}

lib/utils.d.ts

@@ -5,3 +5,3 @@ import { State } from './State';
 export declare function toStatePath(stateId: string | string[]): string[];
-export declare function toTrie(stateValue: State | StateValue): StateValue;
+export declare function toStateValue(stateValue: State | StateValue): StateValue;
 export declare function mapValues<T, P>(collection: {
@@ -14,1 +14,6 @@ [key: string]: T;
 };
+/**
+ * Retrieves a value at the given path.
+ * @param props The deep path to the prop of the desired value
+ */
+export declare const path: (props: string[]) => any;

lib/utils.js

@@ -27,3 +27,3 @@ "use strict";
 exports.toStatePath = toStatePath;
-function toTrie(stateValue) {
+function toStateValue(stateValue) {
     if (stateValue instanceof State_1.State) {
@@ -52,3 +52,3 @@ return stateValue.value;
 }
-exports.toTrie = toTrie;
+exports.toStateValue = toStateValue;
 function mapValues(collection, iteratee) {
@@ -62,1 +62,13 @@ var result = {};
 exports.mapValues = mapValues;
+/**
+ * Retrieves a value at the given path.
+ * @param props The deep path to the prop of the desired value
+ */
+exports.path = function (props) { return function (object) {
+    var result = object;
+    for (var _i = 0, props_1 = props; _i < props_1.length; _i++) {
+        var prop = props_1[_i];
+        result = result[prop];
+    }
+    return result;
+}; };

package.json

 {
   "name": "xstate",
-  "version": "3.1.0",
+  "version": "3.1.1",
   "description": "Simple JavaScript Finite State Machines and Statecharts",
@@ -5,0 +5,0 @@ "main": "lib/index.js",

src/actions.ts

 import {
-  ActionObject,
   Action,
-  ActionType,
   Event,
   EventType,
-  EventObject
+  EventObject,
+  ActivityAction,
+  SendAction,
+  SendActionOptions,
+  CancelAction
 } from './types';
@@ -22,10 +24,2 @@ import { getEventType } from './utils';
 
-export interface ActivityAction extends ActionObject {
-  activity: ActionType;
-  data: {
-    type: ActionType;
-    [key: string]: any;
-  };
-}
-
 const createActivityAction = (actionType: string) => (
@@ -45,3 +39,3 @@ activity: Action
 
-const toEventObject = (event: Event): EventObject => {
+export const toEventObject = (event: Event): EventObject => {
   if (typeof event === 'string' || typeof event === 'number') {
@@ -59,11 +53,2 @@ return { type: event };
 
-export interface SendAction extends ActionObject {
-  event: EventObject;
-  delay?: number;
-}
-export interface SendActionOptions {
-  delay?: number;
-  id?: string | number;
-}
-
 export const send = (event: Event, options?: SendActionOptions): SendAction => {
@@ -78,6 +63,2 @@ return {
 
-export interface CancelAction extends ActionObject {
-  sendId: string | number;
-}
-
 export const cancel = (sendId: string | number): CancelAction => {
@@ -84,0 +65,0 @@ return {

src/graph.ts

 import { StateNode } from './index';
-import { toTrie } from './utils';
+import { toStateValue } from './utils';
 import {
-  // Transition,
   StateValue,
   Machine,
-  Event,
-  // TargetTransitionConfig,
-  Condition,
-  Action
+  Edge,
+  Segment,
+  PathMap,
+  PathItem,
+  PathsItem,
+  PathsMap,
+  AdjacencyMap
 } from './types';
 
 const EMPTY_MAP = {};
-export interface Edge {
-  event: string;
-  source: StateNode;
-  target: StateNode;
-  cond?: Condition;
-  actions: Action[];
-}
-export interface INodesAndEdges {
-  nodes: StateNode[];
-  edges: Edge[];
-}
 
@@ -95,36 +86,5 @@ export function getNodes(node: StateNode): StateNode[] {
 
-export interface Segment {
-  state: StateValue;
-  event: Event;
-}
+export function getAdjacencyMap(node: Machine): AdjacencyMap {
+  const adjacency: AdjacencyMap = {};
 
-export interface IPathMap {
-  [key: string]: Segment[];
-}
-
-export interface IPathItem {
-  state: StateValue;
-  path: Segment[];
-}
-
-export interface IPathsItem {
-  state: StateValue;
-  paths: Segment[][];
-}
-
-export interface IPathsMap {
-  [key: string]: Segment[][];
-}
-
-export interface ITransitionMap {
-  state: StateValue | undefined;
-}
-
-export interface IAdjacencyMap {
-  [stateId: string]: Record<string, ITransitionMap>;
-}
-
-export function getAdjacencyMap(node: Machine): IAdjacencyMap {
-  const adjacency: IAdjacencyMap = {};
-
   const events = node.events;
@@ -154,3 +114,3 @@
 
-export function getShortestPaths(machine: Machine): IPathMap {
+export function getShortestPaths(machine: Machine): PathMap {
   if (!machine.states) {
@@ -161,3 +121,3 @@ return EMPTY_MAP;
   const initialStateId = JSON.stringify(machine.initialState.value);
-  const pathMap: IPathMap = {
+  const pathMap: PathMap = {
     [initialStateId]: []
@@ -167,3 +127,3 @@ };
 
-  function util(stateValue: StateValue): IPathMap {
+  function util(stateValue: StateValue): PathMap {
     const stateId = JSON.stringify(stateValue);
@@ -180,3 +140,3 @@ visited.add(stateId);
 
-      const nextStateId = JSON.stringify(toTrie(nextStateValue));
+      const nextStateId = JSON.stringify(toStateValue(nextStateValue));
 
@@ -218,3 +178,3 @@ if (
 
-export function getShortestPathsAsArray(machine: Machine): IPathItem[] {
+export function getShortestPathsAsArray(machine: Machine): PathItem[] {
   const result = getShortestPaths(machine);
@@ -227,3 +187,3 @@ return Object.keys(result).map(key => ({
 
-export function getSimplePaths(machine: Machine): IPathsMap {
+export function getSimplePaths(machine: Machine): PathsMap {
   if (!machine.states) {
@@ -236,3 +196,3 @@ return EMPTY_MAP;
   const path: Segment[] = [];
-  const paths: IPathsMap = {};
+  const paths: PathsMap = {};
 
@@ -275,3 +235,3 @@ function util(fromPathId: string, toPathId: string) {
 
-export function getSimplePathsAsArray(machine: Machine): IPathsItem[] {
+export function getSimplePathsAsArray(machine: Machine): PathsItem[] {
   const result = getSimplePaths(machine);
@@ -278,0 +238,0 @@ return Object.keys(result).map(key => ({

src/index.ts

@@ -1,694 +0,8 @@
-import { getEventType, toStatePath, toTrie, mapValues } from './utils';
-import {
-  Event,
-  StateValue,
-  Transition,
-  Action,
-  Machine,
-  StandardMachine,
-  ParallelMachine,
-  SimpleOrCompoundStateNodeConfig,
-  MachineConfig,
-  ParallelMachineConfig,
-  EventType,
-  EventObject,
-  ActionMap,
-  StandardMachineConfig,
-  TransitionConfig,
-  ActivityMap,
-  StateNodeConfig,
-  Activity,
-  StateTransition
-} from './types';
-import matchesState from './matchesState';
-import mapState from './mapState';
+import { matchesState } from './matchesState';
+import { mapState } from './mapState';
+import { StateNode } from './StateNode';
 import { State } from './State';
-import { start, stop } from './actions';
+import { Machine } from './Machine';
+import * as actions from './actions';
 
-const STATE_DELIMITER = '.';
-const HISTORY_KEY = '$history';
-const NULL_EVENT = '';
-class StateNode implements StateNodeConfig {
-  public key: string;
-  public id: string;
-  public relativeId: string;
-  public initial?: string;
-  public parallel?: boolean;
-  public states: Record<string, StateNode>;
-  public on?: Record<string, Transition | undefined>;
-  public onEntry?: Action[];
-  public onExit?: Action[];
-  public activities?: Activity[];
-  public strict: boolean;
-  public parent?: StateNode;
-  public machine: StateNode;
-  public data: object | undefined;
-
-  private __cache = {
-    events: undefined as EventType[] | undefined,
-    relativeValue: new Map() as Map<StateNode, StateValue>,
-    initialState: undefined as StateValue | undefined
-  };
-
-  constructor(
-    public config:
-      | SimpleOrCompoundStateNodeConfig
-      | StandardMachineConfig
-      | ParallelMachineConfig
-  ) {
-    this.key = config.key || '(machine)';
-    this.parent = config.parent;
-    this.machine = this.parent ? this.parent.machine : this;
-    this.id = this.parent
-      ? this.parent.id + STATE_DELIMITER + this.key
-      : this.key;
-    this.relativeId =
-      this.parent && this.parent.parent
-        ? this.parent.relativeId + STATE_DELIMITER + this.key
-        : this.key;
-    this.initial = config.initial;
-    this.parallel = !!config.parallel;
-    this.states = (config.states
-      ? mapValues<SimpleOrCompoundStateNodeConfig, StateNode>(
-          config.states,
-          (stateConfig, key) =>
-            new StateNode({
-              ...stateConfig,
-              key,
-              parent: this
-            })
-        )
-      : {}) as Record<string, StateNode>;
-
-    this.on = config.on;
-    this.strict = !!config.strict;
-    this.onEntry = config.onEntry
-      ? ([] as Action[]).concat(config.onEntry)
-      : undefined;
-    this.onExit = config.onExit
-      ? ([] as Action[]).concat(config.onExit)
-      : undefined;
-    this.data = config.data;
-    this.activities = config.activities;
-  }
-  public getStateNodes(state: StateValue | State): StateNode[] {
-    const stateValue = state instanceof State ? state.value : toTrie(state);
-
-    if (typeof stateValue === 'string') {
-      const initialStateValue = (this.states[stateValue] as StateNode).initial;
-
-      return initialStateValue
-        ? this.getStateNodes({ [stateValue]: initialStateValue })
-        : [this.states[stateValue]];
-    }
-
-    const subStateKeys = Object.keys(stateValue);
-    const subStateNodes: StateNode[] = subStateKeys.map(
-      subStateKey => this.states[subStateKey]
-    );
-
-    return subStateNodes.concat(
-      subStateKeys
-        .map(subStateKey => {
-          return this.states[subStateKey].getStateNodes(
-            stateValue[subStateKey]
-          );
-        })
-        .reduce((a, b) => a.concat(b))
-    );
-  }
-  public handles(event: Event): boolean {
-    const eventType = getEventType(event);
-
-    if (this.on) {
-      return eventType in this.on;
-    }
-
-    return false;
-  }
-  public transition(
-    state: StateValue | State,
-    event: Event,
-    extendedState?: any
-  ): State {
-    if (this.strict) {
-      const eventType = getEventType(event);
-      if (this.events.indexOf(eventType) === -1) {
-        throw new Error(
-          `Machine '${this.id}' does not accept event '${eventType}'`
-        );
-      }
-    }
-
-    const stateTransition = this.transitionStateValue(
-      state,
-      event,
-      extendedState
-    );
-    const nextState = this.stateTransitionToState(stateTransition, state);
-
-    if (!nextState) {
-      return State.inert(state);
-    }
-
-    // Try transitioning from "transient" states from the NULL_EVENT
-    // until a state with non-transient transitions is found
-    let maybeNextState: State | undefined = nextState;
-    let nextStateFromInternalTransition: State;
-    do {
-      nextStateFromInternalTransition = maybeNextState;
-      maybeNextState = this.stateTransitionToState(
-        this.transitionStateValue(
-          nextStateFromInternalTransition,
-          NULL_EVENT,
-          extendedState
-        ),
-        nextStateFromInternalTransition
-      );
-    } while (maybeNextState);
-
-    // TODO: handle internally raised events
-
-    return nextStateFromInternalTransition;
-  }
-  private stateTransitionToState(
-    stateTransition: StateTransition,
-    prevState: StateValue | State
-  ): State | undefined {
-    const {
-      stateValue: nextStateValue,
-      actions: nextActions,
-      activities: nextActivities
-    } = stateTransition;
-
-    if (!nextStateValue) {
-      return undefined;
-    }
-
-    const prevActivities =
-      prevState instanceof State ? prevState.activities : undefined;
-
-    const activities = { ...prevActivities, ...nextActivities };
-
-    return new State(
-      // next state value
-      nextStateValue,
-      // history
-      State.from(prevState),
-      // effects
-      nextActions
-        ? nextActions.onExit
-            .concat(nextActions.actions)
-            .concat(nextActions.onEntry)
-        : [],
-      // activities
-      activities,
-      // data
-      this.getStateNodes(nextStateValue).reduce(
-        (data, stateNode) => {
-          data[stateNode.id] = stateNode.data;
-          return data;
-        },
-        {} as Record<string, any>
-      )
-    );
-  }
-  private transitionStateValue(
-    state: StateValue | State,
-    event: Event,
-    extendedState?: any
-  ): StateTransition {
-    const history = state instanceof State ? state.history : undefined;
-    let stateValue = toTrie(state);
-
-    if (typeof stateValue === 'string') {
-      if (!this.states[stateValue]) {
-        throw new Error(
-          `State '${stateValue}' does not exist on machine '${this.id}'`
-        );
-      }
-
-      const subStateNode = this.states[stateValue] as StateNode;
-      if (subStateNode.states && subStateNode.initial) {
-        // Get the initial state value
-        const initialStateValue = subStateNode.initialState.value;
-        stateValue = { [stateValue]: initialStateValue };
-      } else {
-        // Transition from the substate
-        return subStateNode.next(
-          event,
-          history ? history.value : undefined,
-          extendedState
-        );
-      }
-    }
-
-    // Potential transition tuples from parent state nodes
-    const potentialStateTransitions: StateTransition[] = [];
-
-    let nextStateValue = mapValues(stateValue, (subStateValue, subStateKey) => {
-      const subHistory = history ? history.value[subStateKey] : undefined;
-      const subState = new State(
-        subStateValue,
-        subHistory ? State.from(subHistory) : undefined
-      );
-      const subStateNode = this.states[subStateKey];
-      const subStateTransition = subStateNode.transitionStateValue(
-        subState,
-        event,
-        extendedState
-      );
-
-      if (!subStateTransition.stateValue) {
-        potentialStateTransitions.push(
-          subStateNode.next(
-            event,
-            history ? history.value : undefined,
-            extendedState
-          )
-        );
-      }
-
-      return subStateTransition;
-    });
-
-    if (
-      Array.prototype.every.call(Object.keys(nextStateValue), key => {
-        return nextStateValue[key].stateValue === undefined;
-      })
-    ) {
-      if (this.parallel) {
-        if (potentialStateTransitions.length) {
-          return potentialStateTransitions[0];
-        }
-
-        return {
-          stateValue: undefined,
-          actions: { onEntry: [], onExit: [], actions: [] },
-          activities: undefined
-        };
-      }
-
-      const subStateKey = Object.keys(nextStateValue)[0];
-
-      // try with parent
-      const {
-        stateValue: parentNextValue,
-        actions: parentNextActions,
-        activities: parentActivities
-      } = this.states[subStateKey].next(
-        event,
-        history ? history.value : undefined,
-        extendedState
-      );
-      const nextActions = nextStateValue[subStateKey].actions;
-      const activities = nextStateValue[subStateKey].activities;
-
-      const allActivities = {
-        ...activities,
-        ...parentActivities
-      };
-
-      const allActions = parentNextActions
-        ? nextActions
-          ? {
-              onEntry: [...nextActions.onEntry, ...parentNextActions.onEntry],
-              actions: [...nextActions.actions, ...parentNextActions.actions],
-              onExit: [...nextActions.onExit, ...parentNextActions.onExit]
-            }
-          : parentNextActions
-        : nextActions;
-
-      return {
-        stateValue: parentNextValue,
-        actions: allActions,
-        activities: allActivities
-      };
-    }
-
-    if (this.parallel) {
-      nextStateValue = {
-        ...mapValues(
-          this.initialState.value as Record<string, StateValue>,
-          subStateValue => ({
-            stateValue: subStateValue,
-            actions: { onEntry: [], onExit: [], actions: [] },
-            activities: undefined
-          })
-        ),
-        ...nextStateValue
-      };
-    }
-
-    const finalActions: ActionMap = {
-      onEntry: [],
-      actions: [],
-      onExit: []
-    };
-    const finalActivities: ActivityMap = {};
-    const finalStateValue = mapValues(
-      nextStateValue,
-      (subStateTransition, key) => {
-        const {
-          stateValue: nextSubStateValue,
-          actions: nextSubActions,
-          activities: nextSubActivities
-        } = subStateTransition;
-        if (nextSubActions) {
-          if (nextSubActions.onEntry) {
-            finalActions.onEntry.push(...nextSubActions.onEntry);
-          }
-          if (nextSubActions.actions) {
-            finalActions.actions.push(...nextSubActions.actions);
-          }
-          if (nextSubActions.onExit) {
-            finalActions.onExit.push(...nextSubActions.onExit);
-          }
-        }
-        if (nextSubActivities) {
-          Object.assign(finalActivities, nextSubActivities);
-        }
-
-        if (!nextSubStateValue) {
-          return stateValue[key];
-        }
-
-        return nextSubStateValue;
-      }
-    );
-
-    return {
-      stateValue: finalStateValue,
-      actions: finalActions,
-      activities: finalActivities
-    };
-  }
-
-  private next(
-    event: Event,
-    history?: StateValue,
-    extendedState?: any
-  ): StateTransition {
-    const eventType = getEventType(event);
-    const actionMap: ActionMap = { onEntry: [], onExit: [], actions: [] };
-    const activityMap: ActivityMap = {};
-
-    if (this.onExit) {
-      actionMap.onExit = this.onExit;
-    }
-    if (this.activities) {
-      this.activities.forEach(activity => {
-        activityMap[getEventType(activity)] = false;
-        actionMap.onExit = actionMap.onExit.concat(stop(activity));
-      });
-    }
-
-    if (!this.on || !this.on[eventType]) {
-      return {
-        stateValue: undefined,
-        actions: actionMap,
-        activities: activityMap
-      };
-    }
-
-    const transition = this.on[eventType] as Transition;
-    let nextStateString: string | undefined;
-
-    if (typeof transition === 'string') {
-      nextStateString = transition;
-    } else {
-      const candidates = Array.isArray(transition)
-        ? transition
-        : Object.keys(transition).map(key => ({
-            ...transition[key],
-            target: key
-          }));
-
-      for (const candidate of candidates) {
-        const {
-          cond,
-          actions: transitionActions
-        } = candidate as TransitionConfig;
-        const extendedStateObject = extendedState || {};
-        const eventObject: EventObject =
-          typeof event === 'string' || typeof event === 'number'
-            ? { type: event }
-            : event;
-        if (!cond || cond(extendedStateObject, eventObject)) {
-          nextStateString = candidate.target;
-          if (transitionActions) {
-            actionMap.actions = actionMap.actions.concat(transitionActions);
-          }
-          break;
-        }
-      }
-    }
-
-    if (!nextStateString) {
-      return {
-        stateValue: undefined,
-        actions: actionMap,
-        activities: activityMap
-      };
-    }
-
-    const nextStatePath = toStatePath(nextStateString);
-    let currentState = this.parent;
-    let currentHistory = history;
-    let currentPath = this.key;
-
-    nextStatePath.forEach(subPath => {
-      if (!currentState || !currentState.states) {
-        throw new Error(`Unable to read '${subPath}'`);
-      }
-
-      if (subPath === HISTORY_KEY) {
-        if (currentHistory) {
-          subPath =
-            typeof currentHistory === 'object'
-              ? Object.keys(currentHistory)[0]
-              : currentHistory;
-        } else if (currentState.initial) {
-          subPath = currentState.initial;
-        } else {
-          throw new Error(
-            `Cannot read '${HISTORY_KEY}' from state '${currentState.id}': missing 'initial'`
-          );
-        }
-      } else if (subPath === NULL_EVENT) {
-        actionMap.onExit = [];
-        currentState = currentState.states[this.key];
-        return;
-      }
-
-      currentState = currentState.states[subPath];
-
-      if (currentState === undefined) {
-        throw new Error(
-          `Event '${event}' on state '${currentPath}' leads to undefined state '${nextStatePath.join(
-            STATE_DELIMITER
-          )}'.`
-        );
-      }
-
-      if (currentState.onEntry) {
-        actionMap.onEntry = actionMap.onEntry.concat(currentState.onEntry);
-      }
-      if (currentState.activities) {
-        currentState.activities.forEach(activity => {
-          activityMap[getEventType(activity)] = true;
-          actionMap.onEntry = actionMap.onEntry.concat(start(activity));
-        });
-      }
-
-      currentPath = subPath;
-
-      if (currentHistory) {
-        currentHistory = currentHistory[subPath];
-      }
-    });
-
-    if (!currentState) {
-      throw new Error('no state');
-    }
-
-    while (currentState.initial) {
-      if (!currentState || !currentState.states) {
-        throw new Error(`Invalid initial state`);
-      }
-      currentState = currentState.states[currentState.initial];
-
-      if (currentState.onEntry) {
-        actionMap.onEntry = actionMap.onEntry.concat(currentState.onEntry);
-      }
-      if (currentState.activities) {
-        currentState.activities.forEach(activity => {
-          activityMap[getEventType(activity)] = true;
-          actionMap.onEntry = actionMap.onEntry.concat(start(activity));
-        });
-      }
-    }
-
-    return {
-      stateValue: currentState.getRelativeValue(this.parent),
-      actions: actionMap,
-      activities: activityMap
-    };
-  }
-  private get resolvedStateValue(): StateValue {
-    const { key } = this;
-
-    if (this.parallel) {
-      return {
-        [key]: mapValues(
-          this.states,
-          stateNode => stateNode.resolvedStateValue[stateNode.key]
-        )
-      };
-    }
-
-    if (!this.initial) {
-      // If leaf node, value is just the state node's key
-      return key;
-    }
-
-    return {
-      [key]: this.states[this.initial].resolvedStateValue
-    };
-  }
-  private get initialStateValue(): StateValue | undefined {
-    const initialStateValue =
-      this.__cache.initialState ||
-      ((this.parallel
-        ? mapValues(
-            this.states as Record<string, StateNode>,
-            state => state.initialStateValue
-          )
-        : this.resolvedStateValue[this.key]) as StateValue);
-
-    this.__cache.initialState = initialStateValue;
-
-    return this.__cache.initialState;
-  }
-  public get initialState(): State {
-    const { initialStateValue } = this;
-
-    if (!initialStateValue) {
-      throw new Error(
-        `Cannot retrieve initial state from simple state '${this.id}.'`
-      );
-    }
-
-    const entryActions = this.getStateNodes(initialStateValue).reduce(
-      (actions, stateNode) =>
-        stateNode.onEntry ? actions.concat(stateNode.onEntry) : actions,
-      [] as Action[]
-    );
-
-    return new State(initialStateValue, undefined, entryActions);
-  }
-  public getStates(stateValue: StateValue): StateNode[] {
-    if (typeof stateValue === 'string') {
-      return [this.states[stateValue]];
-    }
-
-    const stateNodes: StateNode[] = [];
-
-    Object.keys(stateValue).forEach(key => {
-      stateNodes.push(...this.states[key].getStates(stateValue[key]));
-    });
-
-    return stateNodes;
-  }
-  public getState(relativeStateId: string | string[]): StateNode | undefined {
-    const statePath = toStatePath(relativeStateId);
-
-    try {
-      return statePath.reduce(
-        (subState, subPath) => {
-          if (!subState.states) {
-            throw new Error(
-              `Cannot retrieve subPath '${subPath}' from node with no states`
-            );
-          }
-          return subState.states[subPath];
-        },
-        this as StateNode
-      );
-    } catch (e) {
-      throw new Error(
-        `State '${relativeStateId} does not exist on machine '${this.id}'`
-      );
-    }
-  }
-  get events(): EventType[] {
-    if (this.__cache.events) {
-      return this.__cache.events;
-    }
-    const { states } = this;
-    const events = new Set(this.on ? Object.keys(this.on) : undefined);
-
-    if (states) {
-      Object.keys(states).forEach(stateId => {
-        const state = states[stateId];
-        if (state.states) {
-          for (const event of state.events) {
-            events.add(`${event}`);
-          }
-        }
-      });
-    }
-
-    return (this.__cache.events = Array.from(events));
-  }
-  private getRelativeValue(toNode?: StateNode): StateValue {
-    const memoizedRelativeValue = toNode
-      ? this.__cache.relativeValue.get(toNode)
-      : undefined;
-
-    if (memoizedRelativeValue) {
-      return memoizedRelativeValue;
-    }
-
-    const initialStateValue = this.initialStateValue;
-    let relativeValue = initialStateValue
-      ? {
-          [this.key]: initialStateValue
-        }
-      : this.key;
-    let currentNode: StateNode = this.parent as StateNode;
-
-    while (currentNode && currentNode !== toNode) {
-      const currentInitialState = currentNode.initialStateValue;
-      relativeValue = {
-        [currentNode.key]:
-          currentNode.parallel &&
-          typeof currentInitialState === 'object' &&
-          typeof relativeValue === 'object'
-            ? { ...currentInitialState, ...relativeValue }
-            : relativeValue
-      };
-      currentNode = currentNode.parent as StateNode;
-    }
-
-    this.__cache.relativeValue.set(toNode as StateNode, relativeValue);
-
-    return relativeValue;
-  }
-}
-
-export interface MachineFactory {
-  (config: MachineConfig | ParallelMachineConfig):
-    | StandardMachine
-    | ParallelMachine;
-  standard: (config: MachineConfig) => StandardMachine;
-  parallel: (config: ParallelMachineConfig) => ParallelMachine;
-}
-
-export function Machine(
-  config: MachineConfig | ParallelMachineConfig
-): StandardMachine | ParallelMachine {
-  return new StateNode(config) as StandardMachine | ParallelMachine;
-}
-
-export { StateNode, State, matchesState, mapState };
+export { Machine, StateNode, State, matchesState, mapState, actions };

src/mapState.ts

@@ -1,4 +0,4 @@
-import matchesState from './matchesState';
+import { matchesState } from './matchesState';
 
-export default function mapState(
+export function mapState(
   stateMap: { [stateId: string]: any },
@@ -5,0 +5,0 @@ stateId: string

src/matchesState.ts

@@ -1,10 +0,10 @@
-import { toTrie } from './utils'; // TODO: change to utils
+import { toStateValue } from './utils'; // TODO: change to utils
 import { StateValue } from './types';
 
-export default function matchesState(
+export function matchesState(
   parentStateId: StateValue,
   childStateId: StateValue
 ): boolean {
-  const parentStateValue = toTrie(parentStateId);
-  const childStateValue = toTrie(childStateId);
+  const parentStateValue = toStateValue(parentStateId);
+  const childStateValue = toStateValue(childStateId);
 
@@ -11,0 +11,0 @@ if (typeof childStateValue === 'string') {

src/State.ts

 import { StateValue, Action, ActivityMap } from './types';
 import { STATE_DELIMITER, EMPTY_ACTIVITY_MAP } from './constants';
-import { toTrie } from './utils';
+import { toStateValue } from './utils';
 
@@ -11,3 +11,3 @@ export class State {
 
-    return new State(toTrie(stateValue));
+    return new State(toStateValue(stateValue));
   }
@@ -14,0 +14,0 @@ public static inert(stateValue: State | StateValue): State {

src/types.ts

@@ -1,2 +0,2 @@
-import { StateNode } from './index';
+import { StateNode } from './StateNode';
 import { State } from './State';
@@ -32,2 +32,3 @@
   actions?: Action[];
+  in?: StateValue;
 }
@@ -100,3 +101,2 @@
   id: string;
-  relativeId: string;
   initial: string | undefined;
@@ -128,3 +128,2 @@ parallel: boolean;
   states: Record<string, StateNode>;
-  on: never;
   onEntry: never;
@@ -169,1 +168,66 @@ onExit: never;
 }
+
+export interface ActivityAction extends ActionObject {
+  activity: ActionType;
+  data: {
+    type: ActionType;
+    [key: string]: any;
+  };
+}
+
+export interface SendAction extends ActionObject {
+  event: EventObject;
+  delay?: number;
+  id: string | number;
+}
+export interface SendActionOptions {
+  delay?: number;
+  id?: string | number;
+}
+
+export interface CancelAction extends ActionObject {
+  sendId: string | number;
+}
+
+export interface Edge {
+  event: string;
+  source: StateNode;
+  target: StateNode;
+  cond?: Condition;
+  actions: Action[];
+}
+export interface NodesAndEdges {
+  nodes: StateNode[];
+  edges: Edge[];
+}
+
+export interface Segment {
+  state: StateValue;
+  event: Event;
+}
+
+export interface PathMap {
+  [key: string]: Segment[];
+}
+
+export interface PathItem {
+  state: StateValue;
+  path: Segment[];
+}
+
+export interface PathsItem {
+  state: StateValue;
+  paths: Segment[][];
+}
+
+export interface PathsMap {
+  [key: string]: Segment[][];
+}
+
+export interface TransitionMap {
+  state: StateValue | undefined;
+}
+
+export interface AdjacencyMap {
+  [stateId: string]: Record<string, TransitionMap>;
+}

src/utils.ts

@@ -28,3 +28,3 @@ import { State } from './State';
 
-export function toTrie(stateValue: State | StateValue): StateValue {
+export function toStateValue(stateValue: State | StateValue): StateValue {
   if (stateValue instanceof State) {
@@ -70,1 +70,17 @@ return stateValue.value;
 }
+
+/**
+ * Retrieves a value at the given path.
+ * @param props The deep path to the prop of the desired value
+ */
+export const path = (props: string[]): any => <T extends Record<string, any>>(
+  object: T
+): any => {
+  let result: Record<string, any> = object;
+
+  for (const prop of props) {
+    result = result[prop];
+  }
+
+  return result;
+};

test/examples/6.16.test.ts

@@ -11,3 +11,9 @@ import { Machine } from '../../src/index';
         states: {
-          C: { on: { 2: 'D' } },
+          C: {
+            on: {
+              2: {
+                D: { in: 'B.E' }
+              }
+            }
+          },
           D: { on: { 1: 'C' } }
@@ -40,3 +46,3 @@ }
       1: undefined,
-      2: { A: 'D', B: 'G' },
+      2: undefined,
       3: { A: 'C', B: 'F' }
@@ -43,0 +49,0 @@ }

test/graph.test.ts

@@ -7,3 +7,2 @@ import { assert } from 'chai';
   getShortestPaths,
-  IPathMap,
   getSimplePaths,
@@ -14,2 +13,3 @@ getAdjacencyMap,
 } from '../src/graph';
+import { PathMap } from '../src/types';
 // tslint:disable-next-line:no-var-requires
@@ -339,3 +339,3 @@ // import * as util from 'util';
       assert.lengthOf(
-        (getShortestPaths(lightMachine) as IPathMap)[
+        (getShortestPaths(lightMachine) as PathMap)[
           JSON.stringify(lightMachine.initialState.value)
@@ -342,0 +342,0 @@ ],

test/history.test.ts

@@ -47,1 +47,227 @@ import { assert } from 'chai';
 });
+
+describe('deep history states', () => {
+  const historyMachine = Machine({
+    key: 'history',
+    initial: 'off',
+    states: {
+      off: {
+        on: {
+          POWER: 'on.$history',
+          DEEP_POWER: 'on.$history.$history',
+          DEEPEST_POWER: 'on.$history.$history.$history'
+        }
+      },
+      on: {
+        initial: 'first',
+        states: {
+          first: {
+            on: { SWITCH: 'second' }
+          },
+          second: {
+            initial: 'A',
+            states: {
+              A: {
+                on: { INNER: 'B' }
+              },
+              B: {
+                initial: 'P',
+                states: {
+                  P: {
+                    on: { INNER: 'Q' }
+                  },
+                  Q: {}
+                }
+              }
+            }
+          }
+        },
+        on: {
+          POWER: 'off'
+        }
+      }
+    }
+  });
+
+  describe('$history', () => {
+    // on.first -> on.second.A
+    const state2A = historyMachine.transition({ on: 'first' }, 'SWITCH');
+    // on.second.A -> on.second.B.P
+    const state2BP = historyMachine.transition(state2A, 'INNER');
+    // on.second.B.P -> on.second.B.Q
+    const state2BQ = historyMachine.transition(state2BP, 'INNER');
+
+    it('should go to the shallow history', () => {
+      // on.second.B.P -> off
+      const stateOff = historyMachine.transition(state2BP, 'POWER');
+      assert.equal(
+        historyMachine.transition(stateOff, 'POWER').toString(),
+        'on.second.A'
+      );
+    });
+    it('should go to the deep history', () => {
+      // on.second.B.P -> off
+      const stateOff = historyMachine.transition(state2BP, 'POWER');
+      assert.equal(
+        historyMachine.transition(stateOff, 'DEEP_POWER').toString(),
+        'on.second.B.P'
+      );
+    });
+    it('should go to the deepest history', () => {
+      // on.second.B.Q -> off
+      const stateOff = historyMachine.transition(state2BQ, 'POWER');
+      assert.equal(
+        historyMachine.transition(stateOff, 'DEEPEST_POWER').toString(),
+        'on.second.B.Q'
+      );
+    });
+    it('can go to the shallow histor even when $history.$history is used', () => {
+      const stateOff = historyMachine.transition(state2A, 'POWER');
+      assert.equal(
+        historyMachine.transition(stateOff, 'DEEPEST_POWER').toString(),
+        'on.second.A'
+      );
+    });
+  });
+});
+
+describe('parallel history states', () => {
+  const historyMachine = Machine({
+    key: 'parallelhistory',
+    initial: 'off',
+    states: {
+      off: {
+        on: {
+          SWITCH: 'on', // go to the initial states
+          POWER: 'on.$history',
+          DEEP_POWER: 'on.$history.$history',
+          DEEPEST_POWER: 'on.$history.$history.$history'
+        }
+      },
+      on: {
+        parallel: true,
+        states: {
+          A: {
+            initial: 'B',
+            states: {
+              B: {
+                on: { INNER_A: 'C' }
+              },
+              C: {
+                initial: 'D',
+                states: {
+                  D: {
+                    on: { INNER_A: 'E' }
+                  },
+                  E: {}
+                }
+              }
+            }
+          },
+          K: {
+            initial: 'L',
+            states: {
+              L: {
+                on: { INNER_K: 'M' }
+              },
+              M: {
+                initial: 'N',
+                states: {
+                  N: {
+                    on: { INNER_K: 'O' }
+                  },
+                  O: {}
+                }
+              }
+            }
+          }
+        },
+        on: {
+          POWER: 'off'
+        }
+      }
+    }
+  });
+
+  describe('$history', () => {
+    // on.first -> on.second.A
+    const stateABKL = historyMachine.transition(
+      historyMachine.initialState,
+      'SWITCH'
+    );
+    // INNER_A twice
+    const stateACDKL = historyMachine.transition(stateABKL, 'INNER_A');
+    const stateACEKL = historyMachine.transition(stateACDKL, 'INNER_A');
+
+    // INNER_K twice
+    const stateACEKMN = historyMachine.transition(stateACEKL, 'INNER_K');
+    const stateACEKMO = historyMachine.transition(stateACEKMN, 'INNER_K');
+
+    it('should ignore parallel state history', () => {
+      const stateOff = historyMachine.transition(stateACDKL, 'POWER');
+      assert.deepEqual(historyMachine.transition(stateOff, 'POWER').value, {
+        on: { A: 'B', K: 'L' }
+      });
+    });
+
+    it('should remember first level state history', () => {
+      const stateOff = historyMachine.transition(stateACDKL, 'POWER');
+      assert.deepEqual(
+        historyMachine.transition(stateOff, 'DEEP_POWER').value,
+        {
+          on: { A: { C: 'D' }, K: 'L' }
+        }
+      );
+    });
+
+    it('should remember second level state history', () => {
+      const stateOff = historyMachine.transition(stateACDKL, 'POWER');
+      assert.deepEqual(
+        historyMachine.transition(stateOff, 'DEEPEST_POWER').value,
+        {
+          on: { A: { C: 'D' }, K: 'L' }
+        }
+      );
+    });
+
+    it('should remember second level state history, ignoring too many levels of $history', () => {
+      const stateOff = historyMachine.transition(stateACDKL, 'POWER');
+      assert.deepEqual(
+        historyMachine.transition(stateOff, 'DEEPEST_POWER').value,
+        {
+          on: { A: { C: 'D' }, K: 'L' }
+        }
+      );
+    });
+
+    it('should remember three levels of state history', () => {
+      const stateOff = historyMachine.transition(stateACEKL, 'POWER');
+      assert.deepEqual(
+        historyMachine.transition(stateOff, 'DEEPEST_POWER').value,
+        {
+          on: { A: { C: 'E' }, K: 'L' }
+        }
+      );
+    });
+
+    xit('should re-enter each regions of parallel state correctly', () => {
+      const stateOff = historyMachine.transition(stateACEKMO, 'POWER');
+      assert.deepEqual(
+        historyMachine.transition(stateOff, 'DEEP_POWER').value,
+        {
+          on: { A: { C: 'D' }, K: { M: 'N' } }
+        }
+      );
+    });
+
+    xit('should retain all regions of parallel state', () => {
+      const stateOff = historyMachine.transition(stateACEKMO, 'POWER');
+      assert.deepEqual(
+        historyMachine.transition(stateOff, 'DEEPEST_POWER').value,
+        {
+          on: { A: { C: 'E' }, K: { M: 'O' } }
+        }
+      );
+    });
+  });
+});

test/machine.test.ts

@@ -48,2 +48,17 @@ import { assert } from 'chai';
 
+  const topLevelMachine = Machine({
+    initial: 'Hidden',
+    on: {
+      CLICKED_CLOSE: 'Hidden'
+    },
+    states: {
+      Hidden: {
+        on: {
+          PUBLISH_FAILURE: 'Failure'
+        }
+      },
+      Failure: {}
+    }
+  });
+
   describe('machine.states', () => {
@@ -78,2 +93,8 @@ it('should properly register machine states', () => {
   });
+
+  xit('should listen to events declared at top state', () => {
+    const actualState = topLevelMachine.transition('Failure', 'CLICKED_CLOSE');
+
+    assert.deepEqual(actualState.value, 'Hidden');
+  });
 });

test/transient.test.ts

@@ -60,2 +60,30 @@ import { Machine } from '../src/index';
   });
+
+  it('should carry actions from previous transitions within same step', () => {
+    const machine = Machine({
+      initial: 'A',
+      states: {
+        A: {
+          onExit: 'exit_A',
+          on: {
+            TIMER: {
+              T: { actions: ['timer'] }
+            }
+          }
+        },
+        T: {
+          on: {
+            '': [{ target: 'B' }]
+          }
+        },
+        B: {
+          onEntry: 'enter_B'
+        }
+      }
+    });
+
+    const state = machine.transition('A', 'TIMER');
+
+    assert.deepEqual(state.actions, ['exit_A', 'timer', 'enter_B']);
+  });
 });

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increased by6.52%

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Total package byte prevSize

615947

decreased by-13.28%

Lines of code

6556

decreased by-31.26%

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