<?php

class Qs_Form_Element_MultiFile extends Qs_Form_Element_ExtendedFile
{
    protected $_oldValue = [];
    protected $_ignore = false;
    protected $_isArray = true;

    public function getDownloadUrl($value = null)
    {
        if (null === $value) {
            $value = $this->getValue();
        }

        $destination = $this->getTransferAdapter()->getDestination($this->getName());
        if (is_array($destination)) {
            $destination = reset($destination);
        }

        $fullFileName = $destination . '/' . rawurlencode($value);
        $downloadUrl = str_replace(WWW_PATH, BASE_URL, $fullFileName);

        return $downloadUrl;
    }

    public function getValue()
    {
        if (!is_null($this->_value)) {
            return $this->_value;
        }
        if (!$this->isValid(null)) {
            return $this->_oldValue;
        }

        if (!$this->receive()) {
            return null;
        }

        $content = $this->getTransferAdapter()->getFileName($this->getName());
        if (empty($content)) {
            return null;
        }

        $filenames = $this->getFileName();
        if (count($filenames) == 1) {
            $this->_value = $this->_oldValue;
            $this->_value[] = basename($filenames);
            return $this->_value;
        }
        $this->_value = $this->_oldValue;
        foreach ($filenames as $filename) {
            $this->_value[] = basename($filename);
        }
        return $this->_value;
    }

    protected function _initOldValue($context)
    {
        if (array_key_exists($this->getName(), $context)) {
            $this->_oldValue = $context[$this->getName()];
        }
        return $this;
    }

    public function isValid($value, $context = null)
    {
        if (null !== $context) {
            $this->_initOldValue($context);
        }
        if (!$this->getTransferAdapter()->getUploadedCount($this->getName())) {
            if ($this->isRequired()) {
                if (empty($this->_oldValue)) {
                    $this->getTransferAdapter()->addError('File is required');
                    $this->_value = $this->_oldValue;
                    return false;
                } else {
                    $this->_value = $this->_oldValue;
                    return true;
                }
            } else {
                $this->_value = $this->_oldValue;
                return true;
            }
        }
        return Zend_Form_Element_File::isValid($value, $context);
    }

    public function loadDefaultDecorators()
    {
        if ($this->loadDefaultDecoratorsIsDisabled()) {
            return;
        }
        $decorators = $this->getDecorators();
        if (empty($decorators)) {
            $this->addDecorator('MultiFile')
                ->addDecorator('Errors')
                ->addDecorator('Description')
                ->addDecorator('HtmlTag', ['tag' => 'dd', 'id' => $this->getName() . '-element'])
                ->addDecorator('Label', ['tag' => 'dt']);
        }
    }
}