@tduyng/prettyoutput/lib/esm/utils.js

Library to format JSON objects into a colorful, YAML-style output. Ideal for pretty printing logs with high performance.

import { colors } from './colors.js';
const cache = new Map();
const CLEANUP_THRESHOLD = 1000;
let cacheInsertCount = 0;
const cleanupCache = () => {
    cache.clear();
};
/**
 * Creates a string with specified spaces count
 * @param {number} spaceCount - space count
 * @return {string}
 */
export const indent = (spaceCount) => {
    if (!cache.has(spaceCount)) {
        cache.set(spaceCount, ' '.repeat(spaceCount));
        cacheInsertCount++;
        if (cacheInsertCount >= CLEANUP_THRESHOLD) {
            cacheInsertCount = 0;
            cleanupCache();
        }
    }
    return cache.get(spaceCount);
};
/**
 * Gets longest string length
 * @param {Array<string>} strings
 * @return {number}
 */
export const maxLength = (strings) => {
    let max = 0;
    for (const str of strings) {
        if (str?.length > max)
            max = str.length;
    }
    return max;
};
/**
 *
 * @param {string} input - single or multiline string
 * @param {string} indentation - indentation space as string
 * @return {string} - Indented multiline string
 */
export const alignString = (input, indentation) => input
    .split('\n')
    .map((line) => `${indentation}${line}`)
    .join('\n');
/**
 *
 * @param {string} input
 * @param {string} color name
 * @return {string} - colored string (for terminal output)
 */
export const colorString = (input, color) => color ? `${colors[color](input)}` : input;
export const repeat = (string, count) => string.repeat(Math.max(0, count));
/**
 * Serializable values are boolean, number, null, Date, Single line strings, empty arrays
 * @param {*} input
 * @return {boolean}
 */
export const isSerializable = (input) => {
    if (input === null || input === undefined)
        return true;
    if (typeof input === 'boolean' || typeof input === 'number' || input instanceof Date)
        return true;
    if (typeof input === 'string' && !input.includes('\n'))
        return true;
    return Array.isArray(input) && input.length === 0;
};
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