/lib/Lampcms/Modules/Google/src/service/apiUtils.php

<?php

/*

 * Copyright 2011 Google Inc.

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



/**

 * Collection of static utility methods used for convenience across

 * the client library.

 *

 * @author Chirag Shah <chirags@google.com>

 */

class apiUtils {

  public static function urlSafeB64Encode($data) {

    $b64 = base64_encode($data);

    $b64 = str_replace(array('+', '/', '\r', '\n', '='),

                       array('-', '_'),

                       $b64);

    return $b64;

  }



  public static function urlSafeB64Decode($b64) {

    $b64 = str_replace(array('-', '_'),

                       array('+', '/'),

                       $b64);

    return base64_decode($b64);

  }



  /**

   * Misc function used to count the number of bytes in a post body, in the world of multi-byte chars

   * and the unpredictability of strlen/mb_strlen/sizeof, this is the only way to do that in a sane

   * manner at the moment.

   *

   * This algorithm was originally developed for the

   * Solar Framework by Paul M. Jones

   *

   * @link   http://solarphp.com/

   * @link   http://svn.solarphp.com/core/trunk/Solar/Json.php

   * @link   http://framework.zend.com/svn/framework/standard/trunk/library/Zend/Json/Decoder.php

   * @param  string $str

   * @return int The number of bytes in a string.

   */

  static public function getStrLen($str) {

    $strlenVar = strlen($str);

    $d = $ret = 0;

    for ($count = 0; $count < $strlenVar; ++ $count) {

      $ordinalValue = ord($str{$ret});

      switch (true) {

        case (($ordinalValue >= 0x20) && ($ordinalValue <= 0x7F)):

          // characters U-00000000 - U-0000007F (same as ASCII)

          $ret ++;

          break;



        case (($ordinalValue & 0xE0) == 0xC0):

          // characters U-00000080 - U-000007FF, mask 110XXXXX

          // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

          $ret += 2;

          break;



        case (($ordinalValue & 0xF0) == 0xE0):

          // characters U-00000800 - U-0000FFFF, mask 1110XXXX

          // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

          $ret += 3;

          break;



        case (($ordinalValue & 0xF8) == 0xF0):

          // characters U-00010000 - U-001FFFFF, mask 11110XXX

          // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

          $ret += 4;

          break;



        case (($ordinalValue & 0xFC) == 0xF8):

          // characters U-00200000 - U-03FFFFFF, mask 111110XX

          // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

          $ret += 5;

          break;



        case (($ordinalValue & 0xFE) == 0xFC):

          // characters U-04000000 - U-7FFFFFFF, mask 1111110X

          // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

          $ret += 6;

          break;

        default:

          $ret ++;

      }

    }

    return $ret;

  }



  /**

   * Normalize all keys in an array to lower-case.

   * @param array $arr

   * @return array Normalized array.

   */

  public static function normalize($arr) {

    if (!is_array($arr)) {

      return array();

    }



    $normalized = array();

    foreach ($arr as $key => $val) {

      $normalized[strtolower($key)] = $val;

    }

    return $normalized;

  }

}