34 lines
1.2 KiB
TypeScript
34 lines
1.2 KiB
TypeScript
import {useContext} from 'react'
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import { DataManagerContext } from 'next-server/dist/lib/data-manager-context'
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import { RouterContext } from 'next-server/dist/lib/router-context'
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import fetch from 'unfetch'
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export function createHook(fetcher: () => Promise<any>, options: {key: string}) {
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if (!options.key) {
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throw new Error('key not provided to createHook options.')
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}
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return function useData() {
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const router: import('next-server/lib/router/router').default = useContext(RouterContext)
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const dataManager: import('next-server/lib/data-manager').DataManager = useContext(DataManagerContext)
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const existing = dataManager.get(options.key)
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if (existing && existing.status === 'resolved') {
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return existing.result
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}
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// @ts-ignore webpack optimization
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if (process.browser) {
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const res = fetch(router.route === '/' ? 'index.json' : router.route + '.json').then((res: any) => res.json()).then((result: any) => {
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dataManager.overwrite(result)
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})
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throw res
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} else {
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const res = fetcher().then((result) => {
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dataManager.set(options.key, {
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status: 'resolved',
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result,
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})
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})
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throw res
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}
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}
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}
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