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import { createAction } from './actions'
const typeId = '@@type'
const globalStore = {}
/**
* Converts regular events in to typed events
* Can be used with update functions that expect type events
*/
export const typeEvent = (update, store = globalStore, create = createAction) => {
const map = event => {
if (!event.type) {
return event
}
const { type, payload = null } = event
const typed = store[type]
if (typed) {
return typed.of(payload)
}
store[type] = create(type)
return store[type].of(payload)
}
return (state, event) => update(state, map(event))
}
/**
* Converts typed events in to regular events
* Can be used with update functions that expect regular events
*/
export const untypeEvent = update => {
const map = event => {
if (!event.join || !event[typeId]) {
return event
}
return {
type: event[typeId],
payload: event.join()
}
}
return (state, event) => update(state, map(event))
}
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