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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | 1x 1x 1x 19x 1x 18x 18x 8x 4x 18x 2x 2x 18x 2x 2x 18x 18x 18x 14x 4x 18x 19x | /**
* Copyright (c) 2021-present, Matti Bar-Zeev.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
import {useEffect, useRef, useState} from 'react';
type UsePaginationProps = {
totalPages: number;
initialCursor?: number;
onChange?: (value: number) => void;
};
export const NO_TOTAL_PAGES_ERROR = 'The UsePagination hook must receive a totalPages argument for it to work';
const usePagination = ({totalPages, initialCursor = 0, onChange}: UsePaginationProps) => {
if (!totalPages) {
throw new Error(NO_TOTAL_PAGES_ERROR);
}
const [cursor, setInternalCursor] = useState(initialCursor);
const setCursor = (newCursor: number) => {
if (newCursor >= 0 && newCursor < totalPages) {
setInternalCursor(newCursor);
}
};
const goNext = () => {
const nextCursor = cursor + 1;
setCursor(nextCursor);
};
const goPrev = () => {
const prevCursor = cursor - 1;
setCursor(prevCursor);
};
const isHookInitializing = useRef(true);
useEffect(() => {
if (isHookInitializing.current) {
isHookInitializing.current = false;
} else {
onChange?.(cursor);
}
}, [cursor]);
return {totalPages, cursor, goNext, goPrev, setCursor};
};
export default usePagination;
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