1 <?php

     2 /**

     3  * Zend Framework

     4  *

     5  * LICENSE

     6  *

     7  * This source file is subject to the new BSD license that is bundled

     8  * with this package in the file LICENSE.txt.

     9  * It is also available through the world-wide-web at this URL:

    10  * http://framework.zend.com/license/new-bsd

    11  * If you did not receive a copy of the license and are unable to

    12  * obtain it through the world-wide-web, please send an email

    13  * to license@zend.com so we can send you a copy immediately.

    14  *

    15  * @category   Zend

    16  * @package    Zend_Feed_Reader

    17  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

    18  * @license    http://framework.zend.com/license/new-bsd     New BSD License

    19  * @version    $Id: Feed.php 20096 2010-01-06 02:05:09Z bkarwin $

    20  */

    21 

    22 /**

    23  * @see Zend_Feed_Reader_Extension_FeedAbstract

    24  */

    25 require_once 'Zend/Feed/Reader/Extension/FeedAbstract.php';

    26 

    27 require_once 'Zend/Date.php';

    28 

    29 /**

    30  * @category   Zend

    31  * @package    Zend_Feed_Reader

    32  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

    33  * @license    http://framework.zend.com/license/new-bsd     New BSD License

    34  */

    35 class Zend_Feed_Reader_Extension_Syndication_Feed

    36     extends Zend_Feed_Reader_Extension_FeedAbstract

    37 {

    38     /**

    39      * Get update period

    40      * @return string

    41      */

    42     public function getUpdatePeriod()

    43     {

    44         $name = 'updatePeriod';

    45         $period = $this->_getData($name);

    46 

    47         if ($period === null) {

    48             $this->_data[$name] = 'daily';

    49             return 'daily'; //Default specified by spec

    50         }

    51 

    52         switch ($period)

    53         {

    54             case 'hourly':

    55             case 'daily':

    56             case 'weekly':

    57             case 'yearly':

    58                 return $period;

    59             default:

    60                 throw new Zend_Feed_Exception("Feed specified invalid update period: '$period'."

    61                     .  " Must be one of hourly, daily, weekly or yearly"

    62                 );

    63         }

    64     }

    65 

    66     /**

    67      * Get update frequency

    68      * @return int

    69      */

    70     public function getUpdateFrequency()

    71     {

    72         $name = 'updateFrequency';

    73         $freq = $this->_getData($name, 'number');

    74 

    75         if (!$freq || $freq < 1) {

    76             $this->_data[$name] = 1;

    77             return 1;

    78         }

    79 

    80         return $freq;

    81     }

    82 

    83     /**

    84      * Get update frequency as ticks

    85      * @return int

    86      */

    87     public function getUpdateFrequencyAsTicks()

    88     {

    89         $name = 'updateFrequency';

    90         $freq = $this->_getData($name, 'number');

    91 

    92         if (!$freq || $freq < 1) {

    93             $this->_data[$name] = 1;

    94             $freq = 1;

    95         }

    96 

    97         $period = $this->getUpdatePeriod();

    98         $ticks = 1;

    99 

   100         switch ($period)

   101         {

   102             //intentional fall through

   103             case 'yearly':

   104                 $ticks *= 52; //TODO: fix generalisation, how?

   105             case 'weekly':

   106                 $ticks *= 7;

   107             case 'daily':

   108                 $ticks *= 24;

   109             case 'hourly':

   110                 $ticks *= 3600;

   111                 break;

   112             default: //Never arrive here, exception thrown in getPeriod()

   113                 break;

   114         }

   115 

   116         return $ticks / $freq;

   117     }

   118 

   119     /**

   120      * Get update base

   121      *

   122      * @return Zend_Date|null

   123      */

   124     public function getUpdateBase()

   125     {

   126         $updateBase = $this->_getData('updateBase');

   127         $date = null;

   128         if ($updateBase) {

   129             $date = new Zend_Date;

   130             $date->set($updateBase, Zend_Date::W3C);

   131         }

   132         return $date;

   133     }

   134 

   135     /**

   136      * Get the entry data specified by name

   137      *

   138      * @param string $name

   139      * @param string $type

   140      * @return mixed|null

   141      */

   142     private function _getData($name, $type = 'string')

   143     {

   144         if (array_key_exists($name, $this->_data)) {

   145             return $this->_data[$name];

   146         }

   147 

   148         $data = $this->_xpath->evaluate($type . '(' . $this->getXpathPrefix() . '/syn10:' . $name . ')');

   149 

   150         if (!$data) {

   151             $data = null;

   152         }

   153 

   154         $this->_data[$name] = $data;

   155 

   156         return $data;

   157     }

   158 

   159     /**

   160      * Register Syndication namespaces

   161      *

   162      * @return void

   163      */

   164     protected function _registerNamespaces()

   165     {

   166         $this->_xpath->registerNamespace('syn10', 'http://purl.org/rss/1.0/modules/syndication/');

   167     }

   168 }