/**
* Ensures there we have validation rules restricting file types to valid image filetypes and
* that the paths for any thumbnails exist and are writable.
*
* @param array $options
*/
public function __construct($options = array())
{
parent::__construct($options);
// Check that all thumbnail directories are writable...
foreach ($this->thumbnails as $key => $thumbnail) {
if (!isset($thumbnail['quality'])) {
// Use default quality
$thumbnail['quality'] = $this->quality;
}
if (isset($thumbnail['path'])) {
// Ensure the path is normalized and writable if set
$thumbnail['path'] = $this->_check_path($thumbnail['path']);
}
if (!isset($thumbnail['prefix'])) {
// Force the thumbnail prefix to NULL if not set
$thumbnail['prefix'] = NULL;
}
if (!isset($thumbnail['transformations'])) {
// Create an empty array for thumbnail tranformations if not set
$thumbnail['transformations'] = array();
}
if (!$thumbnail['prefix'] and (!isset($thumbnail['path']) or $thumbnail['path'] === $this->path)) {
// If no prefix is set and the thumbnail path is the same as the original path throw exception
throw new Kohana_Exception(':class must have a different `path` or a defined `prefix` property for thumbnails', array(':class' => get_class($this)));
}
// Merge back in
$this->thumbnails[$key] = $thumbnail;
}
}