[44] | 1 | <?php
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| 2 |
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| 3 | /**
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| 4 | * Zend Framework
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| 5 | *
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| 6 | * LICENSE
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| 7 | *
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| 8 | * This source file is subject to the new BSD license that is bundled
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| 9 | * with this package in the file LICENSE.txt.
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| 10 | * It is also available through the world-wide-web at this URL:
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| 11 | * http://framework.zend.com/license/new-bsd
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| 12 | * If you did not receive a copy of the license and are unable to
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| 13 | * obtain it through the world-wide-web, please send an email
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| 14 | * to license@zend.com so we can send you a copy immediately.
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| 15 | *
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| 16 | * @category Zend
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| 17 | * @package Zend_Gdata
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| 18 | * @subpackage App
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| 19 | * @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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| 20 | * @license http://framework.zend.com/license/new-bsd New BSD License
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| 21 | */
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| 22 |
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| 23 | /**
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| 24 | * Utility class for static functions needed by Zend_Gdata_App
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| 25 | *
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| 26 | * @category Zend
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| 27 | * @package Zend_Gdata
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| 28 | * @subpackage App
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| 29 | * @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
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| 30 | * @license http://framework.zend.com/license/new-bsd New BSD License
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| 31 | */
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| 32 | class Zend_Gdata_App_Util
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| 33 | {
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| 34 |
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| 35 | /**
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| 36 | * Convert timestamp into RFC 3339 date string.
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| 37 | * 2005-04-19T15:30:00
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| 38 | *
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| 39 | * @param int $timestamp
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| 40 | * @throws Zend_Gdata_App_InvalidArgumentException
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| 41 | */
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| 42 | public static function formatTimestamp($timestamp)
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| 43 | {
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| 44 | $rfc3339 = '/^(\d{4})\-?(\d{2})\-?(\d{2})((T|t)(\d{2})\:?(\d{2})' .
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| 45 | '\:?(\d{2})(\.\d{1,})?((Z|z)|([\+\-])(\d{2})\:?(\d{2})))?$/';
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| 46 |
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| 47 | if (ctype_digit($timestamp)) {
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| 48 | return gmdate('Y-m-d\TH:i:sP', $timestamp);
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| 49 | } elseif (preg_match($rfc3339, $timestamp) > 0) {
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| 50 | // timestamp is already properly formatted
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| 51 | return $timestamp;
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| 52 | } else {
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| 53 | $ts = strtotime($timestamp);
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| 54 | if ($ts === false) {
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| 55 | require_once 'Zend/Gdata/App/InvalidArgumentException.php';
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| 56 | throw new Zend_Gdata_App_InvalidArgumentException("Invalid timestamp: $timestamp.");
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| 57 | }
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| 58 | return date('Y-m-d\TH:i:s', $ts);
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| 59 | }
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| 60 | }
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| 61 |
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| 62 | /** Find the greatest key that is less than or equal to a given upper
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| 63 | * bound, and return the value associated with that key.
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| 64 | *
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| 65 | * @param integer|null $maximumKey The upper bound for keys. If null, the
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| 66 | * maxiumum valued key will be found.
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| 67 | * @param array $collection An two-dimensional array of key/value pairs
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| 68 | * to search through.
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| 69 | * @returns mixed The value corresponding to the located key.
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| 70 | * @throws Zend_Gdata_App_Exception Thrown if $collection is empty.
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| 71 | */
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| 72 | public static function findGreatestBoundedValue($maximumKey, $collection)
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| 73 | {
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| 74 | $found = false;
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| 75 | $foundKey = $maximumKey;
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| 76 |
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| 77 | // Sanity check: Make sure that the collection isn't empty
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| 78 | if (sizeof($collection) == 0) {
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| 79 | require_once 'Zend/Gdata/App/Exception.php';
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| 80 | throw new Zend_Gdata_App_Exception("Empty namespace collection encountered.");
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| 81 | }
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| 82 |
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| 83 | if ($maximumKey === null) {
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| 84 | // If the key is null, then we return the maximum available
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| 85 | $keys = array_keys($collection);
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| 86 | sort($keys);
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| 87 | $found = true;
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| 88 | $foundKey = end($keys);
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| 89 | } else {
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| 90 | // Otherwise, we optimistically guess that the current version
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| 91 | // will have a matching namespce. If that fails, we decrement the
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| 92 | // version until we find a match.
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| 93 | while (!$found && $foundKey >= 0) {
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| 94 | if (array_key_exists($foundKey, $collection))
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| 95 | $found = true;
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| 96 | else
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| 97 | $foundKey--;
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| 98 | }
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| 99 | }
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| 100 |
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| 101 | // Guard: A namespace wasn't found. Either none were registered, or
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| 102 | // the current protcol version is lower than the maximum namespace.
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| 103 | if (!$found) {
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| 104 | require_once 'Zend/Gdata/App/Exception.php';
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| 105 | throw new Zend_Gdata_App_Exception("Namespace compatible with current protocol not found.");
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| 106 | }
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| 107 |
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| 108 | return $foundKey;
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| 109 | }
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| 110 |
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| 111 | }
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