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<?php
/**
* Get images from content and prepare to save in articles
*/
class Images {
/**
* JPER quality for resize
*/
const JPEG_QUALITY = 80;
/**
* Articles content
* @var string
*/
private $_content;
/**
* Storage to keep images
* @var object Storage
*/
private $_storage;
/**
* images from content
* @var array
*/
private $_images_from_content = array();
/**
* Prepare get images
* @param Strage $storage
* @param string $article_content
*/
public function __construct(Storage $storage, $article_content)
{
$this->_storage = $storage;
$this->_content = $article_content;
$this->_images_from_content = $this->_get_images_from_content($article_content);
}
/**
* get images from url
* @param string $content
* @return array images hashtable
*/
private function _get_images_from_content($content)
{
$result = array();
preg_match_all('/src=\"([a-zA-Z0-9\.\/\-\_\?\+\%\~\&\;\=\:]+)\"/i', $content, $result);
return $result[1];
}
/**
* Start conversion
* @return string converted content
*/
public function convert()
{
foreach ( $this->_images_from_content as $n => $image_url )
{
$image = $this->_get_image($image_url);
$this->_content = str_replace($image_url, '" recindex="'.(int)basename($image), $this->_content);
}
return $this->_content;
}
/**
* Resize image
* @param string $file path
* @param int $new_width max width
*/
private function _resize($file, $new_width = 500)
{
list($width, $height) = getimagesize($file);
$new_height = 0;
//setup the new size of the image
if( $width > $new_width )
{
$ratio = $height/$width;
$new_height = $new_width * $ratio;
}
else
{
$new_width = $width;
$new_height = $height;
}
// resample the image
$new_image = imagecreatetruecolor($new_width, $new_height);
$type = exif_imagetype ( $file );
switch ( $type )
{
case IMAGETYPE_JPEG:
$old_image = imagecreatefromjpeg($file);
imagecopyresampled($new_image, $old_image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagejpeg($new_image, $file, self::JPEG_QUALITY);
break;
case IMAGETYPE_PNG:
$old_image = imagecreatefrompng($file);
imagecopyresampled($new_image, $old_image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagepng($new_image, $file);
break;
case IMAGETYPE_GIF:
$old_image = imagecreatefromgif($file);
imagecopyresampled($new_image, $old_image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagegif($new_image, $file);
break;
}
}
/**
* Resize image
* @return string image path
*/
private function _get_image($url)
{
$image_data = @file_get_contents($url);
if ( $image_data !== false )
{
$image_name = $this->_storage->save_image($image_data);
$this->_resize($image_name);
return $image_name;
}
}
}
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