text: 'use strict'
  var stringWidth = require('string-width')
  
  exports.center = alignCenter
  exports.left = alignLeft
  exports.right = alignRight
  
  // lodash's way of generating pad characters.
  
  function createPadding (width) {
    var result = ''
    var string = ' '
    var n = width
    do {
      if (n % 2) {
        result += string;
      }
      n = Math.floor(n / 2);
      string += string;
    } while (n);
  
    return result;
  }
  
  function alignLeft (str, width) {
    var trimmed = str.trimRight()
    if (trimmed.length === 0 && str.length >= width) return str
    var padding = ''
    var strWidth = stringWidth(trimmed)
  
    if (strWidth < width) {
      padding = createPadding(width - strWidth)
    }
  
    return trimmed + padding
  }
  
  function alignRight (str, width) {
    var trimmed = str.trimLeft()
    if (trimmed.length === 0 && str.length >= width) return str
    var padding = ''
    var strWidth = stringWidth(trimmed)
  
    if (strWidth < width) {
      padding = createPadding(width - strWidth)
    }
  
    return padding + trimmed
  }
  
  function alignCenter (str, width) {
    var trimmed = str.trim()
    if (trimmed.length === 0 && str.length >= width) return str
    var padLeft = ''
    var padRight = ''
    var strWidth = stringWidth(trimmed)
  
    if (strWidth < width) {
      var padLeftBy = parseInt((width - strWidth) / 2, 10)
      padLeft = createPadding(padLeftBy)
      padRight = createPadding(width - (strWidth + padLeftBy))
    }
  
    return padLeft + trimmed + padRight
  }
  