parsing/parser2.js

  1. 'use strict'
  3. const Tokenizer = require('../tokenizing/tokenizer')
  4. const CommandParsers = require('./commandParsers')
  6. /** */
  7. class CommandParser {
  9.     constructor() {
  10.         this._tokenizer = new Tokenizer()
  11.         this._commandParsers = new CommandParsers()
  12.     }
  14.     /** 
  15.      * @param {String} line 
  16.      * @returns {boolean} true if the line can be parsed, false if not 
  17.     */
  18.     isParseable(line) {
  19.         return line.indexOf('@amy') >= 0
  20.     }
  22.     /** 
  23.      * @param {String} line the line to be parsed
  24.      * @returns {Array<Parser.Command>} an array of commands
  25.     */
  26.     parseLine(line) {
  27.         let operations = []
  29.         let tokens = this._tokenizer.tokenize(line)
  31.         if (tokens.length === 2) {
  32.             tokens = tokens[1].match(/[a-zA-Z]+|\([\.a-zA-Z/]+\)/g)
  33.         }
  35.         tokens = tokens.map((token) => {
  36.             return token.replace('(', '').replace(')', '')
  37.         })
  39.         tokens.forEach((token, index) => {
  40.             const parser = this._commandParsers.parserFor(token)
  41.             if (parser) {
  42.                 const operation = parser.parse(tokens, index)
  43.                 operations.push(operation)
  44.             }
  45.         })
  47.         return operations
  48.     }
  49. }
  51. module.exports = CommandParser