[MOD] - Use "Location" field for External Product Image

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//-----BEGIN REMOTE IMAGE EXTRACTION-----// 
//If product does not have a locally stored image...
if($product_info['image'] === '') {
  //Let's get an external Image using a URL stored in the Location field
  if (strpos($product_info['location'], 'http') !== false) {
    //Save the contents of the file to our variable
    $contents = file_get_contents($product_info['location']);
    //If we got some data from the URL...
    if ($contents) {
      $imgExt = '';
      //Set the filename for the image to be saved locally
      $tmpImage = basename($product_info['location']);
      //Check to make sure the filename has a valid image extension
      preg_match('/[^?]*/', $tmpImage, $matches);
      $string = $matches[0];
      $pattern = preg_split('/\./', $string, -1, PREG_SPLIT_OFFSET_CAPTURE);
      //No extension?? It's probably an image served from a DB
      if(count($pattern) == 1 || count($pattern) > 2) {
        //Let's fetch the image type from the page headers
        $imgHeader = get_headers($product_info['location']);
        $imgTypes = array('jpg' => '.jpg', 'jpeg' => '.jpg', 'png' => '.png', 'gif' => '.gif');
        //Cycle through image headers array to match an image type
        foreach ( $imgHeader as $header => $head ) {
          foreach ( $imgTypes as $type => $ext ) {
            //Store the extension we matched
            if(strpos($head, $type)) { $imgExt = $ext; }
          }
        }
        //If we didn't find an appropriate content type then it isn't a valid image. Set ext to NONE as a failsafe
        if($imgExt === '') {$imgExt = 'NONE';}
          //Otherwise, we probably want to change the filename to a managable length since our URL was probably a long string of characters.  
          //Let's process the name to unique 8 char filename using a CRC32 hash
        else { $tmpImage = hash('crc32', $tmpImage); }
      //If the filename did have an extension initially, let's be sure it is a valid one
      } else {
        if(!(strpos($tmpImage, '.jpeg' ) 
          || strpos($tmpImage, '.jpg'  )
          || strpos($tmpImage, '.gif'  )
          || strpos($tmpImage, '.png'  )
          || strpos($tmpImage, '.bmp'  ))) {
            //No valid Extension? Let's fetch the image type from the page headers
            $imgHeader = get_headers($product_info['location']);
            $imgTypes = array('jpg' => '.jpg', 'jpeg' => '.jpg', 'png' => '.png', 'gif' => '.gif');
            //Cycle through image headers array to match an image type
            foreach ( $imgHeader as $header => $head ) {
              foreach ( $imgTypes as $type => $ext ) {
                //Store the extension we matched
                if(strpos($head, $type)) { $imgExt = $ext; }
               }
            }
          //If we didn't find an appropriate content type, then it isn't a valid image. Set ext to NONE as a failsafe
          if($imgExt === '') {$imgExt = 'NONE';}
        }     
      }
      //Now that we have validated the filename and image type
      if($imgExt !== 'NONE') {
        //Add the file extension to the end of our filename, if necessary
        $tmpImage .= $imgExt;
        //Save the file to  our image folder
        file_put_contents(DIR_IMAGE . "data/" . $tmpImage, $contents);
        $product_info['image'] = "data/" . $tmpImage;
        //Let's update the database to reflect the location of our new file so we only call the local file from now on.
        $product_id = $product_info['product_id'];
        $this->db->query("UPDATE " . DB_PREFIX . "product SET image = '" . $this->db->escape($product_info['image']) . "' WHERE product_id = '" . (int)$product_id . "'");
      }
    }
  }   
} //-----END IMAGE EXTRACTION-----//