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<?php
/* --------------------------------------------------------------
   AssetCollection.inc.php 2016-07-27
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2016 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

MainFactory::load_class('AbstractCollection');
MainFactory::load_class('AssetCollectionInterface');

/**
 * Class AssetCollection
 *
 * Handles Asset objects (JavaScript and CSS). Use the getHtml() method
 * to get the HTML output for the collection. The elements will be outputted
 * in the same order they were added in the collection.
 *
 * @category   System
 * @package    Http
 * @subpackage Collections
 */
class AssetCollection extends AbstractCollection implements AssetCollectionInterface
{
    /**
     * Adds a new asset to the collection.
     *
     * @param AssetInterface $asset
     */
    public function add(AssetInterface $asset)
    {
        $this->_add($asset);
    }
    
    
    /**
     * Prints the HTML markup for the assets.
     *
     * @param StringType $type (optional) You can provide either Asset::JAVASCRIPT, Asset::CSS or Asset::TRANSLATION in
     *                         order to get the HTML only for a specific type of assets.
     *
     * @return string Returns the HTML markup of the assets.
     */
    public function getHtml(StringType $type = null)
    {
        $html = '';
        foreach($this->collectionContentArray as $asset)
        {
            if(!empty($type) && $asset->getType() !== $type->asString())
            {
                continue;
            }
            $html .= (string)$asset . PHP_EOL;
        }
        
        return $html;
    }
    
    
    /**
     * Get all the translation assets as one array. 
     * 
     * This array can then be used in frontend from JavaScript (JS Engine or plain scripts).  
     * 
     * @return array
     */
    public function getTranslations()
    {
        $translations = array(); 
        foreach($this->collectionContentArray as $asset)
        {
            if ($asset->getType() !== Asset::TRANSLATION)
            {
                continue; 
            }
            
            $section                = basename($asset->getPath());
            $section                = substr($section, 0, strpos($section, '.'));
            $languageTextManager    = MainFactory::create('LanguageTextManager', $section, $_SESSION['languages_id']);
            $translations[$section] = $languageTextManager->get_section_array($section);
        }
        return $translations;
    }
    
    
    /**
     * Returns the type of the collection items.
     *
     * @return string
     */
    protected function _getValidType()
    {
        return 'AssetInterface';
    }
}