inc/3rdparty/libraries/send2kindle/images.php

   1 <?php
   2
   3 /**
   4  * Get images from content and prepare to save in articles
   5  */
   6 class Images {
   7
   8     /**
   9      * JPER quality for resize
  10      */
  11     const JPEG_QUALITY = 80;
  12
  13     /**
  14      * Articles content
  15      * @var string
  16      */
  17     private $_content;
  18
  19     /**
  20      * Storage to keep images
  21      * @var object Storage
  22      */
  23     private $_storage;
  24
  25     /**
  26      * images from content
  27      * @var array
  28      */
  29     private $_images_from_content = array();
  30
  31     /**
  32      * Prepare get images
  33      * @param Strage $storage
  34      * @param string $article_content
  35      */
  36     public function __construct(Storage $storage, $article_content)
  37     {
  38         $this->_storage = $storage;
  39         $this->_content = $article_content;
  40         $this->_images_from_content = $this->_get_images_from_content($article_content);
  41     }
  42
  43     /**
  44      * get images from url
  45      * @param string $content
  46      * @return array images hashtable
  47      */
  48     private function _get_images_from_content($content)
  49     {
  50         $result = array();
  51         preg_match_all('/src=\"([a-zA-Z0-9\.\/\-\_\?\+\%\~\&\;\=\:]+)\"/i', $content, $result);
  52
  53         return $result[1];
  54     }
  55
  56     /**
  57      * Start conversion
  58      * @return string converted content
  59      */
  60     public function convert()
  61     {
  62         foreach ( $this->_images_from_content as $n => $image_url )
  63         {
  64             $image = $this->_get_image($image_url);
  65             $this->_content = str_replace($image_url, '" recindex="'.(int)basename($image), $this->_content);
  66         }
  67
  68         return $this->_content;
  69     }
  70
  71     /**
  72      * Resize image
  73      * @param string $file path
  74      * @param int $new_width max width
  75      */
  76     private function _resize($file, $new_width = 500)
  77     {
  78         list($width, $height) = getimagesize($file);
  79
  80         $new_height = 0;
  81
  82         //setup the new size of the image
  83         if( $width > $new_width )
  84         {
  85             $ratio = $height/$width;
  86             $new_height = $new_width * $ratio;
  87         }
  88         else
  89         {
  90             $new_width = $width;
  91             $new_height = $height;
  92         }
  93
  94         // resample the image
  95         $new_image = imagecreatetruecolor($new_width, $new_height);
  96
  97         $type = exif_imagetype ( $file );
  98
  99         switch ( $type )
 100         {
 101             case IMAGETYPE_JPEG:
 102                 $old_image = imagecreatefromjpeg($file);
 103                 imagecopyresampled($new_image, $old_image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
 104                 imagejpeg($new_image, $file, self::JPEG_QUALITY);
 105                 break;
 106             case IMAGETYPE_PNG:
 107                 $old_image = imagecreatefrompng($file);
 108                 imagecopyresampled($new_image, $old_image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
 109                 imagepng($new_image, $file);
 110                 break;
 111             case IMAGETYPE_GIF:
 112                 $old_image = imagecreatefromgif($file);
 113                 imagecopyresampled($new_image, $old_image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
 114                 imagegif($new_image, $file);
 115                 break;
 116         }
 117     }
 118
 119     /**
 120      * Resize image
 121      * @return string image path
 122      */
 123     private function _get_image($url)
 124     {
 125         $image_data = @file_get_contents($url);
 126
 127         if ( $image_data !== false )
 128         {
 129             $image_name = $this->_storage->save_image($image_data);
 130             $this->_resize($image_name);
 131
 132             return $image_name;
 133         }
 134     }
 135
 136 }