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<?php namespace la\core\cache;

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if ( ! defined( 'WPINC' ) ) die;

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use Exception;

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use flow\social\cache\FFImageSizeCacheBase;

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use la\core\LAUtils;

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/**

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* Flow-Flow.

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* @package FlowFlow

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* @author Looks Awesome <email@looks-awesome.com>

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* @link http://looks-awesome.com

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* @copyright Looks Awesome

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class LAImageSizeCacheManager extends FFImageSizeCacheBase {

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const FF_IMG_CACHE_SIZE = 1000;

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private $image_cache = null;

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private $new_images = [];

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private $context;

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/**

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* LAImageSizeCacheManager constructor.

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* @param array $context

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public function __construct($context) {

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$this->context = $context;

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}

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public function getOriginalUrl($url){

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$this->lazy();

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$h = hash('md5', $url);

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if (array_key_exists($h, $this->image_cache)){

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return $this->image_cache[$h]['original_url'];

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}

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return '';

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}

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/**

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* @param string $url

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* @param string $original_url

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* @return array

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public function size($url, $original_url = ''){

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$this->lazy();

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$h = hash('md5', $url);

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if ($original_url != '') $url = $original_url;

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if (!array_key_exists($h, $this->image_cache)){

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try{

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$time = date("Y-m-d H:i:s", time());

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if (!empty($url)) {

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if (isset($_REQUEST['debug'])){

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ini_set('upload_max_filesize', '16M');

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ini_set('post_max_size', '16M');

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ini_set('max_input_time', '60');

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}

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@list($width, $height) = getimagesize($url);

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if (empty($width) || empty($height)){

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@list($width, $height) = $this->alternativeGetImageSize($url);

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if (empty($width) || empty($height)){

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$width = -1;

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$height = -1;

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}

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}

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$data = [ 'creation_time' => $time, 'width' => $width, 'height' => $height, 'original_url' => $original_url ];

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} else $data = [ 'creation_time' => $time, 'width' => -1, 'height' => -1, 'original_url' => $original_url ];

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if ($data['width'] > 0 && $data['height'] > 0){

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$this->image_cache[$h] = $data;

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$this->new_images[$h] = $data;

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}

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return $data;

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} catch ( Exception $e) {

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error_log($url);

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error_log($e->getMessage());

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error_log($e->getTraceAsString());

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return [ 'time' => time(), 'width' => -1, 'height' => -1, 'error' => $e->getMessage() ];

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}

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}

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return $this->image_cache[$h];

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}

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/**

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* @return void

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public function save() {

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$this->lazy();

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$dbm = LAUtils::dbm($this->context);

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$conn = $dbm->conn();

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if (sizeof($this->new_images) > 0 && $conn->beginTransaction()){

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foreach ( $this->new_images as $url => $image ) {

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$conn->query('INSERT INTO ?n SET `url` = ?s, ?u ON DUPLICATE KEY UPDATE ?u',

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$dbm->image_cache_table_name, $url, $image, [ 'creation_time' => $image['creation_time'] ] );

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}

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$conn->commit();

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}

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$conn->rollback();

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}

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private function alternativeGetImageSize($url){

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$raw = $this->ranger($url);

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if ($raw === 'URL signature expired'){

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return [ -1, -1 ];

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}

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$im = imagecreatefromstring($raw);

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$width = imagesx($im);

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$height = imagesy($im);

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imagedestroy($im);

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return [ $width, $height ];

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}

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private function ranger($url){

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$headers = [

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"Range: bytes=0-32768"

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];

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$curl = curl_init($url);

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curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36');

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curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);

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curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

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curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);

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curl_setopt($curl, CURLOPT_CONNECTTIMEOUT_MS, 5000);

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curl_setopt($curl, CURLOPT_TIMEOUT, 60);

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$data = curl_exec($curl);

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curl_close($curl);

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return $data;

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}

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private function lazy(){

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if ($this->image_cache == null) {

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$dbm = LAUtils::dbm($this->context);

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$sql = "SELECT `url`, `width`, `height`, `original_url` FROM ?n ORDER BY `creation_time` DESC LIMIT ?i";

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if (false === ($result = $dbm->conn()->getIndCol('url', $sql, $dbm->image_cache_table_name, self::FF_IMG_CACHE_SIZE))) {

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$result = [];

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}

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$this->image_cache = $result;

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}

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}

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}

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