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23 lines
747 B
TypeScript
23 lines
747 B
TypeScript
/*
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* SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
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*
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import { useRouter } from 'next/router'
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import { useMemo } from 'react'
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/**
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* Extracts the parameter from the router expected to be a single value.
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*
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* @param parameter The parameter to extract
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* @param fallback The fallback returned if there is no value.
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* @return A value extracted from the router.
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*/
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export const useSingleStringUrlParameter = <T>(parameter: string, fallback: T): string | T => {
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const router = useRouter()
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return useMemo(() => {
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const value = router.query[parameter]
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return (typeof value === 'string' ? value : value?.[0]) ?? fallback
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}, [fallback, parameter, router.query])
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}
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