grunt-zuckrig-closure/tasks/Parser.js

Reduce a verbose syntax for Google Closure Compiler to be more Pythonic/Rubistic.

var Parser, esprima;

esprima = require('esprima');


/**
  Inspirated by https://github.com/steida/coffee2closure
 */

Parser = (function() {
  function Parser(source) {
    this.source = source;
    this.parsed = null;
    this.tokens = null;
  }

  Parser.prototype.parse = function() {
    this.parsed = esprima.parse(this.source, {
      comment: true,
      tokens: true,
      range: true,
      loc: true
    });
    return this._prepare_tokens();
  };

  Parser.prototype._prepare_tokens = function() {
    this.tokens = this.parsed.tokens.concat(this.parsed.comments);
    return this._sort_tokens(this.tokens);
  };

  Parser.prototype._sort_tokens = function() {
    return this.tokens.sort(function(a, b) {
      if (a.range[0] > b.range[0]) {
        return 1;
      }
      if (a.range[0] < b.range[0]) {
        return -1;
      }
      return 0;
    });
  };

  return Parser;

})();

module.exports = Parser;