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3 lines
1.9 KiB
JavaScript
3 lines
1.9 KiB
JavaScript
var y=function(...t){return{states:t}},E=function(t,...e){return{name:t,eventReactionCouplings:e}},v=function(t,...e){return{eventName:t,reactions:e}},S=function(t){return{type:"SideEffect",fn:t}},b=function(t){return{type:"Goto",targetStateName:t}},M=function(t){return{type:"ContextMutation",fn:t}};function I(t,e,o){typeof o>"u"&&(o=t.states[0].name);let n={machine:t,state:o,context:e,eventQueue:[],isTransitioning:!1,subscriptions:{},isPaused:!0};return n.start=()=>(_(n),n),n.subscribe=i=>(d(n,i),n),a(n,["entry",null]),n}function _(t){t.isPaused===!0&&(t.isPaused=!1,u(t))}function h(t){t.isPaused===!1&&(t.isPaused=!0)}function p(t){return t.machine.states.find(e=>e.name===t.state)}function l(t,e){return t.eventReactionCouplings.filter(o=>o.eventName===e[0])}function a(t,e){t.eventQueue.push(e),t.isTransitioning===!1&&u(t)}var R=a;function u(t){for(t.isTransitioning=!0;t.eventQueue.length>0&&t.isPaused===!1;)x(t);t.isTransitioning=!1,Object.values(t.subscriptions).forEach(e=>{e(t)})}function x(t){let e=t.eventQueue.shift();if(typeof e<"u"){let o=p(t),i=l(o,e).map(s=>s.reactions).flat(),{sideEffects:C,contextMutations:f,goto_:c}=g(i),T=t.context;f.forEach(s=>{t.context=s.fn(t.context,e,t)}),C.forEach(s=>{s.fn(t.context,e,t,T)}),c!==null&&(a(t,["exit",null]),t.state=c.targetStateName,a(t,["entry",null]))}}function g(t){let e=[],o=[],n=null;return t.forEach(i=>{i.type==="SideEffect"?e.push(i):i.type==="ContextMutation"?o.push(i):i.type==="Goto"&&(n=i)}),{sideEffects:e,contextMutations:o,goto_:n}}var r=0;function d(t,e){return r++,t.subscriptions[r.toString()]=e,r.toString()}function A(t,e){delete t.subscriptions[e.toString()]}var F=function(){},m=function(){};export{M as Context,b as Goto,I as Interpreter,y as Machine,v as On,S as SideEffect,F as Spawn,E as State,m as Unspawn,R as enqueue,h as pause,a as send,_ as start,d as subscribe,A as unsubscribe};
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