Function useVersion

frontend/src/hooks/index.ts:79–106

(
	item: ItemWrapper
)

}

export function useVersion(
	item: ItemWrapper
): [number, (newVersion: number) => void] {
	const [hash, updateHash] = useHash()
	const updateVersion = useCallback(
		(newVersion: number) =>
			newVersion < 0 ? updateHash('') : updateHash(`#v${newVersion}`),
		[updateHash]
	)
	const version = useMemo(
		() =>
			hash.includes('#v')
				? Math.min(
						Number.parseInt(hash.replace('#v', ''), 10),
						item.latestVersion
					)
				: item.latestVersion,
		[hash, item.latestVersion]
	)
	useEffect(() => {
		// Correct our hash if someone overshoots
		if (version > item.latestVersion) {
			updateVersion(item.latestVersion)
		}
	}, [version, item.latestVersion, updateVersion])

	return [version, updateVersion]
}