113 lines
4 KiB
PHP
113 lines
4 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Gdata
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* @subpackage App
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Util.php 16971 2009-07-22 18:05:45Z mikaelkael $
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*/
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/**
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* Utility class for static functions needed by Zend_Gdata_App
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*
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* @category Zend
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* @package Zend_Gdata
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* @subpackage App
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Gdata_App_Util
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{
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/**
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* Convert timestamp into RFC 3339 date string.
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* 2005-04-19T15:30:00
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*
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* @param int $timestamp
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* @throws Zend_Gdata_App_InvalidArgumentException
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*/
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public static function formatTimestamp($timestamp)
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{
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$rfc3339 = '/^(\d{4})\-?(\d{2})\-?(\d{2})((T|t)(\d{2})\:?(\d{2})' .
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'\:?(\d{2})(\.\d{1,})?((Z|z)|([\+\-])(\d{2})\:?(\d{2})))?$/';
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if (ctype_digit($timestamp)) {
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return gmdate('Y-m-d\TH:i:sP', $timestamp);
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} elseif (preg_match($rfc3339, $timestamp) > 0) {
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// timestamp is already properly formatted
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return $timestamp;
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} else {
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$ts = strtotime($timestamp);
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if ($ts === false) {
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require_once 'Zend/Gdata/App/InvalidArgumentException.php';
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throw new Zend_Gdata_App_InvalidArgumentException("Invalid timestamp: $timestamp.");
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}
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return date('Y-m-d\TH:i:s', $ts);
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}
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}
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/** Find the greatest key that is less than or equal to a given upper
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* bound, and return the value associated with that key.
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*
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* @param integer|null $maximumKey The upper bound for keys. If null, the
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* maxiumum valued key will be found.
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* @param array $collection An two-dimensional array of key/value pairs
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* to search through.
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* @returns mixed The value corresponding to the located key.
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* @throws Zend_Gdata_App_Exception Thrown if $collection is empty.
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*/
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public static function findGreatestBoundedValue($maximumKey, $collection)
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{
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$found = false;
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$foundKey = $maximumKey;
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// Sanity check: Make sure that the collection isn't empty
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if (sizeof($collection) == 0) {
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require_once 'Zend/Gdata/App/Exception.php';
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throw new Zend_Gdata_App_Exception("Empty namespace collection encountered.");
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}
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if ($maximumKey === null) {
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// If the key is null, then we return the maximum available
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$keys = array_keys($collection);
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sort($keys);
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$found = true;
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$foundKey = end($keys);
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} else {
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// Otherwise, we optimistically guess that the current version
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// will have a matching namespce. If that fails, we decrement the
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// version until we find a match.
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while (!$found && $foundKey >= 0) {
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if (array_key_exists($foundKey, $collection))
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$found = true;
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else
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$foundKey--;
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}
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}
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// Guard: A namespace wasn't found. Either none were registered, or
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// the current protcol version is lower than the maximum namespace.
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if (!$found) {
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require_once 'Zend/Gdata/App/Exception.php';
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throw new Zend_Gdata_App_Exception("Namespace compatible with current protocol not found.");
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}
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return $foundKey;
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}
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}
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