Helper Functions for Handlebars Template Engine for use with the Appcelerator Arrow Middleware

hbsHelpers.js

/**
 * Helper Functions for Handlebars Templating engine
 */


var fs = require('fs')
    Arrow = require('arrow'),
    watch = require('node-watch');

/**
 * This function loops through a directory, and setups up all of the
 * associated files as Hanlebar Partials.
 *
 * @param _dir {String}     - Path of the diretory to use as partials directory
 * @param _watch {Boolean}  - Should the function watch the director for changes
 *                            and update
 */
function registerPartials(_dir, _watch) {

  _watch = _watch || false;

  /**
   * Use the filesystem object to retrieve a list of the files in the
   * passed in directory
   */
  fs.readdir(_dir, function(error, list) {

      /** if there is an error, return the error value **/
      if (error) {
        return error;
      }


      list.forEach(function(fileName) {

        var path = _dir + '/' + fileName;
        var stat = fs.statSync(path);

        /** if this is a directory, then recurse through it **/
        if (stat.isDirectory()) {
          registerPartials(path);
        } else if (stat.isFile())

          var content = fs.readFileSync(path, 'utf8');

          Arrow.Middleware.getRendererEngine('hbs').registerPartial(fileName.replace(".hbs", ""), content)

      });
  });

  /**
      If the dev ops to watch the folder, then lets setup a recursive watch on the directory, and update
      the partial accordingly
  **/
  if(_watch){
    watch( _dir, function(filename) {
      var content = fs.readFileSync(filename, 'utf8');
      var file = filename.split("/").pop();
      Arrow.Middleware.getRendererEngine('hbs').registerPartial(file.replace(".hbs", ""), content)

    });
  }
}
exports.registerPartials = registerPartials;