formatter.js

'use strict';

var indent = require('indent-string');
var pluralize = require('pluralize');

module.exports = function (options) {
    options = options || {};

    var defaultStackFilter = function (string) {
        return string;
    };

    var defaultPrint = function (str) {
        process.stdout.write(str);
    };

    var ansi = {
        green: '\x1B[32m',
        red: '\x1B[31m',
        yellow: '\x1B[33m',
        none: '\x1B[0m'
    };

    this.showColors = options.showColors === undefined ? true : options.showColors;
    this.formatStack = options.stackFilter || defaultStackFilter;
    this.print =  options.print || defaultPrint;

    this.printNewline = function () {
        this.print('\n');
    };

    this.printLine = function (message) {
        this.print(message);
        this.printNewline();
    };

    this.colorize = function (color, str) {
        return this.showColors ? (ansi[color] + str + ansi.none) : str;
    };

    this.pluralize = function (str, count) {
        return pluralize(str, count);
    };

    this.indent = function (str, spaces) {
        return spaces <= 0 ? str : indent(str, ' ', spaces);
    };
};