src/AppBundle/Twig/UploaderExtension.php

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<?php

namespace AppBundle\Twig;

use AppBundle\Util\UploaderToken;

class UploaderExtension extends \Twig_Extension
{
    protected $container;

    protected $pageScripts;

    public function __construct($container)
    {
        $this->container = $container;
    }

    public function getFilters()
    {
        return array();
    }

    public function getFunctions()
    {
        return array(
            new \Twig_SimpleFunction('uploader_token', array($this, 'makeUpoaderToken')),
            new \Twig_SimpleFunction('uploader_process', array($this, 'getProcessMode')),
            new \Twig_SimpleFunction('uploader_accept', array($this, 'getUploadFileAccept')),
        );
    }

    public function makeUpoaderToken($targetType, $targetId, $bucket, $ttl = 86400)
    {
        $maker = new UploaderToken();

        return $maker->make($targetType, $targetId, $bucket, $ttl);
    }

    public function getProcessMode($targetType)
    {
        $modes = array(
            'course-task' => 'auto',
            'coursematerial' => 'auto',
            'materiallib' => 'auto',
            'course-activity' => 'auto',
            'headLeader' => 'none',
        );

        if (isset($modes[$targetType])) {
            return $modes[$targetType];
        }

        return 'auto';
    }

    public function getUploadFileAccept($targetType, $only = '')
    {
        $targetAcceptTypes = array(
            'course-task' => array('video', 'audio', 'flash', 'ppt', 'cloud_document'),
            'course-activity' => array('video', 'audio', 'flash', 'ppt', 'document', 'all'),