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<?php
namespace PicoFeed\Parser;
use DateTime;
use DateTimeZone;
use PicoFeed\Base;
/**
* Date Parser.
*
* @package PicoFeed\Parser
* @author Frederic Guillot
*/
class DateParser extends Base
{
/**
* Timezone used to parse feed dates.
*
* @access private
* @var string
*/
private $timezone = 'UTC';
/**
* Supported formats [ 'format' => length ].
*
* @var array
*/
public $formats = array(
DATE_ATOM => null,
DATE_RSS => null,
DATE_COOKIE => null,
DATE_ISO8601 => null,
DATE_RFC822 => null,
DATE_RFC850 => null,
DATE_RFC1036 => null,
DATE_RFC1123 => null,
DATE_RFC2822 => null,
DATE_RFC3339 => null,
'l, d M Y H:i:s' => null,
'D, d M Y H:i:s' => 25,
'D, d M Y h:i:s' => 25,
'D M d Y H:i:s' => 24,
'j M Y H:i:s' => 20,
'Y-m-d H:i:s' => 19,
'Y-m-d\TH:i:s' => 19,
'd/m/Y H:i:s' => 19,
'D, d M Y' => 16,
'Y-m-d' => 10,
'd-m-Y' => 10,
'm-d-Y' => 10,
'd.m.Y' => 10,
'm.d.Y' => 10,
'd/m/Y' => 10,
'm/d/Y' => 10,
);
/**
* Try to parse all date format for broken feeds.
*
* @param string $value Original date format
*
* @return DateTime
*/
public function getDateTime($value)
{
$value = trim($value);
foreach ($this->formats as $format => $length) {
$truncated_value = $value;
if ($length !== null) {
$truncated_value = substr($truncated_value, 0, $length);
}
$date = $this->getValidDate($format, $truncated_value);
if ($date !== false) {
return $date;
}
}
return $this->getCurrentDateTime();
}
/**
* Get a valid date from a given format.
*
* @param string $format Date format
* @param string $value Original date value
*
* @return DateTime|bool
*/
public function getValidDate($format, $value)
{
$date = DateTime::createFromFormat($format, $value, $this->getTimeZone());
if ($date !== false) {
$errors = DateTime::getLastErrors();
if ($errors['error_count'] === 0 && $errors['warning_count'] === 0) {
return $date;
}
}
return false;
}
/**
* Get the current datetime.
*
* @return DateTime
*/
public function getCurrentDateTime()
{
return new DateTime('now', $this->getTimeZone());
}
/**
* Get DateTimeZone instance
*
* @access public
* @return DateTimeZone
*/
public function getTimeZone()
{
return new DateTimeZone($this->config->getTimezone() ?: $this->timezone);
}
}
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