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<?php |
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/** |
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* GpsLab component. |
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* |
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* @author Peter Gribanov <[email protected]> |
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* @copyright Copyright (c) 2011, Peter Gribanov |
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* @license http://opensource.org/licenses/MIT |
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*/ |
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namespace GpsLab\Component\Sitemap\Stream; |
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use GpsLab\Component\Sitemap\Render\SitemapRender; |
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use GpsLab\Component\Sitemap\Stream\Exception\LinksOverflowException; |
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use GpsLab\Component\Sitemap\Stream\Exception\SizeOverflowException; |
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use GpsLab\Component\Sitemap\Stream\Exception\StreamStateException; |
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use GpsLab\Component\Sitemap\Stream\State\StreamState; |
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use GpsLab\Component\Sitemap\Url\Url; |
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class OutputStream implements Stream |
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{ |
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const LINKS_LIMIT = 50000; |
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const BYTE_LIMIT = 52428800; // 50 Mb |
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/** |
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* @var SitemapRender |
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*/ |
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private $render; |
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/** |
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* @var StreamState |
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*/ |
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private $state; |
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/** |
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* @var int |
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*/ |
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private $counter = 0; |
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/** |
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* @var int |
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*/ |
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private $used_bytes = 0; |
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/** |
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* @var string |
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*/ |
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private $end_string = ''; |
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/** |
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* @param SitemapRender $render |
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*/ |
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public function __construct(SitemapRender $render) |
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{ |
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$this->render = $render; |
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$this->state = new StreamState(); |
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} |
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public function open() |
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{ |
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$this->state->open(); |
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$this->send($this->render->start()); |
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// render end string only once |
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$this->end_string = $this->render->end(); |
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} |
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public function close() |
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{ |
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$this->state->close(); |
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$this->send($this->end_string); |
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} |
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/** |
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* @param Url $url |
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*/ |
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public function push(Url $url) |
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{ |
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if (!$this->state->isReady()) { |
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throw StreamStateException::notReady(); |
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} |
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if ($this->counter >= self::LINKS_LIMIT) { |
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throw LinksOverflowException::withLimit(self::LINKS_LIMIT); |
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} |
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$render_url = $this->render->url($url); |
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$expected_bytes = $this->used_bytes + strlen($render_url) + strlen($this->end_string); |
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if ($expected_bytes > self::BYTE_LIMIT) { |
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throw SizeOverflowException::withLimit(self::BYTE_LIMIT); |
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} |
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$this->send($render_url); |
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++$this->counter; |
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} |
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/** |
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* @return int |
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*/ |
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public function count() |
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{ |
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return $this->counter; |
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} |
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/** |
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* @param string $string |
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*/ |
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private function send($string) |
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{ |
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echo $string; |
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flush(); |
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$this->used_bytes += strlen($string); |
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} |
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} |
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gpslab /
sitemap
