class FileFormField

class FileFormField extends FormField {
    
    /**
     * Sets the PHP error code associated with the field.
     *
     * @param int $error The error code (one of UPLOAD_ERR_INI_SIZE, UPLOAD_ERR_FORM_SIZE, UPLOAD_ERR_PARTIAL, UPLOAD_ERR_NO_FILE, UPLOAD_ERR_NO_TMP_DIR, UPLOAD_ERR_CANT_WRITE, or UPLOAD_ERR_EXTENSION)
     *
     * @throws \InvalidArgumentException When error code doesn't exist
     */
    public function setErrorCode(int $error) : void {
        $codes = [
            \UPLOAD_ERR_INI_SIZE,
            \UPLOAD_ERR_FORM_SIZE,
            \UPLOAD_ERR_PARTIAL,
            \UPLOAD_ERR_NO_FILE,
            \UPLOAD_ERR_NO_TMP_DIR,
            \UPLOAD_ERR_CANT_WRITE,
            \UPLOAD_ERR_EXTENSION,
        ];
        if (!\in_array($error, $codes)) {
            throw new \InvalidArgumentException(\sprintf('The error code "%s" is not valid.', $error));
        }
        $this->value = [
            'name' => '',
            'type' => '',
            'tmp_name' => '',
            'error' => $error,
            'size' => 0,
        ];
    }
    
    /**
     * Sets the value of the field.
     */
    public function upload(?string $value) : void {
        $this->setValue($value);
    }
    
    /**
     * Sets the value of the field.
     */
    public function setValue(?string $value) : void {
        if (null !== $value && is_readable($value)) {
            $error = \UPLOAD_ERR_OK;
            $size = filesize($value);
            $info = pathinfo($value);
            $name = $info['basename'];
            // copy to a tmp location
            $tmp = tempnam(sys_get_temp_dir(), $name);
            if (\array_key_exists('extension', $info)) {
                unlink($tmp);
                $tmp .= '.' . $info['extension'];
            }
            if (is_file($tmp)) {
                unlink($tmp);
            }
            copy($value, $tmp);
            $value = $tmp;
        }
        else {
            $error = \UPLOAD_ERR_NO_FILE;
            $size = 0;
            $name = '';
            $value = '';
        }
        $this->value = [
            'name' => $name,
            'type' => '',
            'tmp_name' => $value,
            'error' => $error,
            'size' => $size,
        ];
    }
    
    /**
     * Sets path to the file as string for simulating HTTP request.
     */
    public function setFilePath(string $path) : void {
        parent::setValue($path);
    }
    
    /**
     * Initializes the form field.
     *
     * @throws \LogicException When node type is incorrect
     */
    protected function initialize() : void {
        if ('input' !== $this->node->nodeName) {
            throw new \LogicException(\sprintf('A FileFormField can only be created from an input tag (%s given).', $this->node->nodeName));
        }
        if ('file' !== strtolower($this->node
            ->getAttribute('type'))) {
            throw new \LogicException(\sprintf('A FileFormField can only be created from an input tag with a type of file (given type is "%s").', $this->node
                ->getAttribute('type')));
        }
        $this->setValue(null);
    }

}