rocket.chat.mqtt/node_modules/route-parser/lib/route/visitors/reconstruct.js

It's a MQTT Server, using redis to scale horizontally.

'use strict';

var createVisitor  = require('./create_visitor');

/**
 * Visitor for the AST to reconstruct the normalized input
 * @class ReconstructVisitor
 * @borrows Visitor-visit
 */
var ReconstructVisitor = createVisitor({
  'Concat': function(node) {
    return node.children
      .map( function(child) {
        return this.visit(child);
      }.bind(this))
      .join('');
  },

  'Literal': function(node) {
    return node.props.value;
  },

  'Splat': function(node) {
    return '*' + node.props.name;
  },

  'Param': function(node) {
    return ':' + node.props.name;
  },

  'Optional': function(node) {
    return '(' + this.visit(node.children[0]) + ')';
  },

  'Root': function(node) {
    return this.visit(node.children[0]);
  }
});

module.exports = ReconstructVisitor;