graph-common/lib/gql.js

Open Graph API core js lib

(function() {
  var GQL, Query;

  Query = require('./query');

  GQL = (function() {
    function GQL() {}

    GQL.parse = function(script, callback) {
      var lines, queries;
      queries = [];
      lines = script.split("\n");
      lines.forEach(function(line) {
        return queries.push(GQL.parse_line(line, callback));
      });
      return queries;
    };

    GQL.parse_line = function(line, callback) {
      var action, data, node, query;
      query = null;
      node = null;
      GQL.parse_node(line, function(parsed, rest) {
        node = parsed;
        return line = rest;
      });
      action = null;
      GQL.parse_action(line, function(parsed, rest) {
        action = parsed;
        return line = rest;
      });
      data = line.trim();
      query = new Query(node, action, data);
      if (callback) {
        callback(query);
      }
      return query;
    };

    GQL.parse_node = function(line, callback) {
      var path, rest, splitted;
      line.replace(/^\s+/, '');
      splitted = line.split(' ');
      path = splitted.shift();
      rest = splitted.join(' ');
      callback(path, rest);
      return path;
    };

    GQL.parse_action = function(line, callback) {
      var action, rest, splitted;
      line.replace(/^\s+/, '');
      splitted = line.split(' ');
      action = splitted.shift().toLowerCase();
      if (action === 'create' || action === 'read' || action === 'update' || action === 'delete') {
        rest = splitted.join(' ');
      } else {
        action = 'read';
        rest = line;
      }
      callback(action, rest);
      return action;
    };

    return GQL;

  })();

  module.exports = GQL;

}).call(this);