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<?php
if ( ! defined( 'ABSPATH' ) )
exit; // Exit if accessed directly.
use EnableMediaReplace\ShortPixelLogger\ShortPixelLogger as Log;
use EnableMediaReplace\Notices\NoticeController as Notices;
/* Simple class for updating thumbnails.
*/
class ThumbnailUpdater
{
protected $attach_id;
protected $oldMeta = array();
protected $newMeta = array();
protected $convertArray = array();
protected $relPath;
protected $post_table;
public function __construct($id)
{
$this->attach_id = intval($id);
global $wpdb;
$table_name = $wpdb->prefix . "posts";
// $postmeta_table_name = $wpdb->prefix . "postmeta";
$this->post_table = $table_name;
}
public function setOldMetadata($metadata)
{
if (isset($metadata['sizes']))
$this->oldMeta = $metadata;
}
public function setNewMetadata($metadata)
{
if (isset($metadata['sizes']))
$this->newMeta = $metadata;
// extract month prefix to prevent overwriting wrong images.
$file = $metadata['file'];
$pos = strrpos($metadata['file'], '/');
$month_path = substr($file, 0, $pos);
$this->relPath = trailingslashit($month_path);
}
public function updateThumbnails()
{
if (count($this->oldMeta) == 0 || count($this->newMeta) == 0)
return false;
$convertArray = array();
foreach($this->oldMeta['sizes'] as $sizeName => $data)
{
if (isset($this->newMeta['sizes'][$sizeName]))
{
//in some rare cases 'file' is missing
$oldFile = isset($data['file']) ? $data['file'] : null;
if(is_array($oldFile)) { $oldFile = $oldFile[0];} // HelpScout case 709692915
if(empty($oldFile)) {
return false; //make sure we don't replace in this case as we will break the URLs for all the images in the folder.
}
$newFile = $this->newMeta['sizes'][$sizeName]['file'];
// if images are not same size.
if ($oldFile != $newFile)
{
$this->convertArray[] = array('imageFrom' => $this->relPath . $oldFile, 'imageTo' => $this->relPath . $newFile );
}
}
else {
$this->findNearestSize($data, $sizeName);
}
}
$this->updateDatabase();
}
protected function updateDatabase()
{
global $wpdb;
$sql = "UPDATE " . $this->post_table . " set post_content = REPLACE(post_content, %s, %s)";
Log::addDebug('Thumbnail Updater - Converting Thumbnails for sizes', $this->convertArray);
foreach($this->convertArray as $convert_item)
{
$from = $convert_item['imageFrom'];
$to = $convert_item['imageTo'];
$replace_sql = $wpdb->prepare($sql, $from, $to );
$wpdb->query($replace_sql);
}
}
/** FindNearestsize
* This works on the assumption that when the exact image size name is not available, find the nearest width with the smallest possible difference to impact the site the least.
*/
protected function findNearestSize($oldData, $sizeName)
{
$old_width = $oldData['width']; // the width from size not in new image
$new_width = $this->newMeta['width']; // default check - new width on image
$diff = abs($old_width - $new_width);
$closest_file = str_replace($this->relPath, '', $this->newMeta['file']);
foreach($this->newMeta['sizes'] as $sizeName => $data)
{
$thisdiff = abs($old_width - $data['width']);
if ( $thisdiff < $diff )
{
$closest_file = $data['file'];
if(is_array($closest_file)) { $closest_file = $closest_file[0];} // HelpScout case 709692915
if(!empty($closest_file)) {
$diff = $thisdiff;
$found_metasize = true;
}
}
}
if(empty($closest_file)) return;
$oldFile = $oldData['file'];
if(is_array($oldFile)) { $oldFile = $oldFile[0];} // HelpScout case 709692915
if(empty($oldFile)) {
return; //make sure we don't replace in this case as we will break the URLs for all the images in the folder.
}
$this->convertArray[] = array('imageFrom' => $this->relPath . $oldFile, 'imageTo' => $this->relPath . $closest_file);
}
}