59 lines
1.5 KiB
TypeScript
59 lines
1.5 KiB
TypeScript
import { clsx, type ClassValue } from "clsx";
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import { twMerge } from "tailwind-merge";
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export function cn(...inputs: ClassValue[]) {
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return twMerge(clsx(inputs));
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}
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/**
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* The implementation for pagination queries in an array.
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* @param array Array input
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* @param pageSize Max elements count for every page.
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* @param pageNumber The current page number.
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* @returns A new array contains elements of specified page.
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*/
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export function paginateArray<T = any>(array: T[], pageSize: number, pageNumber: number) {
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if (array.length === 0) return [];
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if (pageSize < 1) return [];
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if (pageNumber < 1) return [];
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--pageNumber;
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const startIndex = pageNumber * pageSize;
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const endIndex = (pageNumber + 1) * pageSize;
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if (startIndex >= array.length) return [];
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return array.slice(startIndex, endIndex);
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}
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/**
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* Nullify the empty string and convert them into `null`.
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* @param value Possible string input.
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* @returns return `null` if the input belongs to "", undefined and null.
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*/
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export function nullifyEmptyString(value: string | null | undefined): string | null {
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if (value == null) {
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return null;
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}
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if (value.trim() === "") {
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return null;
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}
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return value;
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}
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/**
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* Indicate whether a string is empty value.
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* @param value Possible string input.
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* @returns return `true` if the input belongs to "", undefined and null.
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*/
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export function isEmptyString(value: string | null | undefined): boolean {
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if (value == null) {
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return true;
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}
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if (value.trim() === "") {
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return true;
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}
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return false;
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}
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