38 lines
877 B
TypeScript
38 lines
877 B
TypeScript
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import Value from 'Components/Value'
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import React, { createContext, useContext, useMemo } from 'react'
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import Engine from '.'
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const EngineContext = createContext(new Engine())
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type InputProps = {
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rules?: any
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situation?: any
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children: React.ReactNode
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}
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export function Provider({ rules, situation, children }: InputProps) {
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const engine = useMemo(() => new Engine({ rules }), [rules])
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if (!Object.is(situation, engine.situation)) {
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engine.setSituation(situation)
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}
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return (
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<EngineContext.Provider value={engine}>{children}</EngineContext.Provider>
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)
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}
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export function useEvaluation(expression: string) {
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const engine = useContext(EngineContext)
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return engine.evaluate(expression)
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}
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export function Evaluation({ expression }) {
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const value = useEvaluation(expression)
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return <Value {...value} />
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}
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export default {
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Provider,
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useEvaluation,
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Evaluation
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}
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