@sap/cds-dk/lib/mtx/util/strings.js

Command line client and development toolkit for the SAP Cloud Application Programming Model

const os = require('os');

function intWidth(number) {
    return Math.floor(Math.log10(number)) + 1;
}

function formatObjectsFixedWidth(objects, columns, distance, options = {}) {
    const { numbering = false } = options;

    const maxWidths = columns.reduce((result, column) => Object.assign(result, {
        [column]: Math.max(...objects.map((object) => ('' + object[column]).length))
    }), {});
    const numberingWidth = intWidth(objects.length);
    const separator = ' '.repeat(distance);
    let result = '';

    for (let o = 0; o < objects.length; o++) {
        const object = objects[o];
        if (numbering) {
            result += ' '.repeat(numberingWidth - intWidth(o + 1));
            result += o + 1;
            result += '.';
            result += separator;
        }
        for (let c = 0; c < columns.length; c++) {
            const column = columns[c];
            const value = '' + object[column];
            result += value;
            result += ' '.repeat(maxWidths[column] - value.length);
            if (c < columns.length - 1) {
                result += separator;
            } else {
                result += o < objects.length - 1
                    ? os.EOL
                    : '';
            }
        }
    }

    return result;
}

/**
 * from https://developer.mozilla.org/de/docs/Web/JavaScript/Guide/Regular_Expressions
 */
function escapeRegex(str) {
    return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}

function capitalize(str) {
    return str.charAt(0).toUpperCase() + str.slice(1);
}

module.exports = {
    formatObjectsFixedWidth,
    escapeRegex,
    capitalize
};