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import {
isDefined,
isFn,
check
} from './utils'
const scopedUpdate = (predicate, update) => {
const match = check(predicate)
return (state, event) => {
let type = typeof event === 'string' || isFn(predicate)
? event
: event.type
let checked = isFn(predicate)
? predicate(state, event)
: match(type)
return checked
? update(state, event)
: state
}
}
const createScope = predicate => update => scopedUpdate(predicate, update)
const scope = (predicate, update) => isDefined(update)
? scopedUpdate(predicate, update)
: createScope(predicate)
export default scope
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