omni-tools/src/pages/list/rotate/service.ts

import { isNumber } from 'utils/string';
export type SplitOperatorType = 'symbol' | 'regex';

function rotateArray(
    array: string[],
    step: number,
    right: boolean): string[] {
    const length = array.length;

    // Normalize the step to be within the bounds of the array length
    const normalizedPositions = ((step % length) + length) % length;

    if (right) {
        // Rotate right
        return array.slice(-normalizedPositions).concat(array.slice(0, -normalizedPositions));
    } else {
        // Rotate left
        return array.slice(normalizedPositions).concat(array.slice(0, normalizedPositions));
    }
}

export function rotateList(
    splitOperatorType: SplitOperatorType,
    input: string,
    splitSeparator: string,
    joinSeparator: string,
    right: boolean,
    step?: number,
): string {
    let array: string[];
    let rotatedArray: string[];
    switch (splitOperatorType) {
        case 'symbol':
            array = input.split(splitSeparator);
            break;
        case 'regex':
            array = input.split(new RegExp(splitSeparator));
            break;
    }
    if (step !== undefined) {
        if (step <= 0) {
            throw new Error("Rotation step must be greater than zero.");
        }
        rotatedArray = rotateArray(array, step, right);
        return rotatedArray.join(joinSeparator);
    }
    throw new Error("Rotation step contains non-digits.")
}