Convert TL-Schema File to JSON

tl_convert.js

'use strict';

var fs = require('fs')

var args = process.argv.slice(2);

// From https://github.com/lodash/lodash/blob/4.17.4/lodash.js#L6891
function compact(array) {
  var index = -1,
      length = array == null ? 0 : array.length,
      resIndex = 0,
      result = [];

  while (++index < length) {
    var value = array[index];
    if (value) {
      result[resIndex++] = value;
    }
  }
  return result;
}

var source = fs.readFileSync(`${args[0]}.tl`, 'utf8')

// Remove all comments and end ';'
var pass1 = source.replace(/\/\/.*/g, '').replace(/;/g, '')

// Split it in Array and remove invalid items
var pass2 = compact(pass1.split('\n'))

var schemes = {constructors: [], methods:[]};
var cursor_type = 0; // 0: constructors(types), 1: methods
pass2.forEach((line) => {
    if (line === '---types---') cursor_type = 0
    else if (line === '---functions---') cursor_type = 1
    else {
      var scheme = {
        id: '',
        params: [],
        type: ''
      }
      var argu = line.trim().split(' ')

      // ID: Hex to Dec
      scheme.id = (parseInt(argu[0].split('#')[1], 16)|0).toString()
      scheme.type = argu[argu.length - 1]
      if (argu.length > 3) {
        var params_a = argu.slice(1,-2)
        params_a.forEach((param) => {
          // Process params
          // Seems they are comments.
          if (param.slice(0,1) == '{') return
          // Vector no params
          if (argu[0].split('#')[0] == 'vector') return
          var param_a = param.split(':')
          scheme.params.push({
            name: param_a[0],
            type: param_a[1]
          })
        })
      }
      if (cursor_type === 0) {
        scheme.predicate = argu[0].split('#')[0]
        schemes.constructors.push(scheme)
      } 
      else if (cursor_type === 1) {
        scheme.method = argu[0].split('#')[0]
        schemes.methods.push(scheme)
      } 
    }
})

fs.writeFileSync(`${args[0]}.json`, JSON.stringify(schemes))