<?php

/**
 * ArangoDB PHP client: value validator
 * 
 * @package ArangoDbPhpClient
 * @author Jan Steemann
 * @copyright Copyright 2012, triagens GmbH, Cologne, Germany
 */

namespace triagens\ArangoDb;

/**
 * A simple validator for values to be stored in the database
 *
 * @package ArangoDbPhpClient
 */
class ValueValidator {
  /**
   * Validate the value of a variable
   * Allowed value types are string, integer, double and booleans. Arrays are also allowed if they contain only one of the former types.
   *
   * @throws ClientException
   * @param mixed value - value to validate
   * @return void - will throw if an invalid value type is passed
   */
  public static function validate($value) {
    if (is_string($value) || is_int($value) || is_double($value) || is_bool($value)) {
      // type is allowed
      return;
    }

    if (is_array($value)) {
      // must check all elements contained
      foreach ($value as $subValue) {
        self::validate($subValue);
      }

      return;
    }

    // type is invalid
    throw new ClientException('Invalid bind parameter value');
  }
}