mongo-aql/lib/helpers/query/expression.js

A mongo-like interface for aql generation

var helpers = require('../../query-helpers');
var queryBuilder = require('../../query-builder');

helpers.register('expression', function(exp, values, query){
  if (Array.isArray(exp)) return exp.join(', ');
  if (query.type == 'insert' && typeof exp == 'object')
    return '(' + queryBuilder(exp, values) + ')';
  if (typeof exp == 'object'){
    var val = [
      exp.parenthesis === true ? '( ' : ''
    , queryBuilder(exp, values)
    , exp.parenthesis === true ? ' )' : ''
    ].join('');

    if (Array.isArray(exp.values)){
      for (var i = 0, l = exp.values.length; i < l; ++i){
        val = val.replace(
          RegExp('(\\$)' + (i+1) + '(\\W|$)','g')
        , '$1' + utils.newVar(exp.values[i], values) + '$2'
        );
      }
    }

    return val;
  }
  return exp;
});