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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Feed\Reader\Extension\Syndication;
use DateTime;
use Zend\Feed\Reader;
use Zend\Feed\Reader\Extension;
class Feed extends Extension\AbstractFeed
{
/**
* Get update period
*
* @return string
* @throws Reader\Exception\InvalidArgumentException
*/
public function getUpdatePeriod()
{
$name = 'updatePeriod';
$period = $this->getData($name);
if ($period === null) {
$this->data[$name] = 'daily';
return 'daily'; //Default specified by spec
}
switch ($period) {
case 'hourly':
case 'daily':
case 'weekly':
case 'yearly':
return $period;
default:
throw new Reader\Exception\InvalidArgumentException("Feed specified invalid update period: '$period'."
. " Must be one of hourly, daily, weekly or yearly"
);
}
}
/**
* Get update frequency
*
* @return int
*/
public function getUpdateFrequency()
{
$name = 'updateFrequency';
$freq = $this->getData($name, 'number');
if (!$freq || $freq < 1) {
$this->data[$name] = 1;
return 1;
}
return $freq;
}
/**
* Get update frequency as ticks
*
* @return int
*/
public function getUpdateFrequencyAsTicks()
{
$name = 'updateFrequency';
$freq = $this->getData($name, 'number');
if (!$freq || $freq < 1) {
$this->data[$name] = 1;
$freq = 1;
}
$period = $this->getUpdatePeriod();
$ticks = 1;
switch ($period) {
case 'yearly':
$ticks *= 52; //TODO: fix generalisation, how?
// no break
case 'weekly':
$ticks *= 7;
// no break
case 'daily':
$ticks *= 24;
// no break
case 'hourly':
$ticks *= 3600;
break;
default: //Never arrive here, exception thrown in getPeriod()
break;
}
return $ticks / $freq;
}
/**
* Get update base
*
* @return DateTime|null
*/
public function getUpdateBase()
{
$updateBase = $this->getData('updateBase');
$date = null;
if ($updateBase) {
$date = DateTime::createFromFormat(DateTime::W3C, $updateBase);
}
return $date;
}
/**
* Get the entry data specified by name
*
* @param string $name
* @param string $type
* @return mixed|null
*/
private function getData($name, $type = 'string')
{
if (array_key_exists($name, $this->data)) {
return $this->data[$name];
}
$data = $this->xpath->evaluate($type . '(' . $this->getXpathPrefix() . '/syn10:' . $name . ')');
if (!$data) {
$data = null;
}
$this->data[$name] = $data;
return $data;
}
/**
* Register Syndication namespaces
*
* @return void
*/
protected function registerNamespaces()
{
$this->xpath->registerNamespace('syn10', 'http://purl.org/rss/1.0/modules/syndication/');
}
}