/*!
   * Bootstrap Grunt task for Glyphicons data generation
   * http://getbootstrap.com
   * Copyright 2014-2015 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   */
  
  'use strict';
  
  var fs = require('fs');
  
  module.exports = function generateGlyphiconsData(grunt) {
    // Pass encoding, utf8, so `readFileSync` will return a string instead of a
    // buffer
    var glyphiconsFile = fs.readFileSync('less/glyphicons.less', 'utf8');
    var glyphiconsLines = glyphiconsFile.split('
  ');
  
    // Use any line that starts with ".glyphicon-" and capture the class name
    var iconClassName = /^\.(glyphicon-[a-zA-Z0-9-]+)/;
    var glyphiconsData = '# This file is generated via Grunt task. **Do not edit directly.**
  ' +
                         '# See the \'build-glyphicons-data\' task in Gruntfile.js.
  
  ';
    var glyphiconsYml = 'docs/_data/glyphicons.yml';
    for (var i = 0, len = glyphiconsLines.length; i < len; i++) {
      var match = glyphiconsLines[i].match(iconClassName);
  
      if (match !== null) {
        glyphiconsData += '- ' + match[1] + '
  ';
      }
    }
  
    // Create the `_data` directory if it doesn't already exist
    if (!fs.existsSync('docs/_data')) {
      fs.mkdirSync('docs/_data');
    }
  
    try {
      fs.writeFileSync(glyphiconsYml, glyphiconsData);
    } catch (err) {
      grunt.fail.warn(err);
    }
    grunt.log.writeln('File ' + glyphiconsYml.cyan + ' created.');
  };