<?php

/**
 *
 * @author     Tomáš Naibrt / <tomas@naibrt.cz>
 */
class saUploadedFile extends sfValidatedFile
{

    /**
     * Prepare file for save.
     *
     * This method can throw exceptions if there is a problem when saving the file.
     *
     * If you don't pass a file name, it will be generated by the generateFilename method.
     * This will only work if you have passed a path when initializing this instance.
     *
     * @param  string $file      The file path to save the file
     * @param  int    $fileMode  The octal mode to use for the new file
     * @param  bool   $create    Indicates that we should make the directory before moving the file
     * @param  int    $dirMode   The octal mode to use when creating the directory
     *
     * @return string The filename with the $this->path prefix
     *
     * @throws Exception
     */
    public function presave($file = null, $fileMode = 0666, $create = true, $dirMode = 0777)
    {
        if (is_null($file))
        {
            $file = $this->generateFilename();
        }

        if ($file[0] != '/' && $file[0] != '\\' && !(strlen($file) > 3 && ctype_alpha($file[0]) && $file[1] == ':' && ($file[2] == '\\' || $file[2] == '/')))
        {
            if (is_null($this->path))
            {
                throw new RuntimeException('You must give a "path" when you give a relative file name.');
            }

            $file = $this->path . DIRECTORY_SEPARATOR . $file;
        }

        // get our directory path from the destination filename
        $directory = dirname($file);
        if (!is_readable($directory))
        {
            if ($create && !mkdir($directory, $dirMode, true))
            {
                // failed to create the directory
                throw new Exception(sprintf('Failed to create file upload directory "%s".', $directory));
            }

            // chmod the directory since it doesn't seem to work on recursive paths
            chmod($directory, $dirMode);
        }
        if (!is_dir($directory))
        {
            // the directory path exists but it's not a directory
            throw new Exception(sprintf('File upload path "%s" exists, but is not a directory.', $directory));
        }
        if (!is_writable($directory))
        {
            // the directory isn't writable
            throw new Exception(sprintf('File upload path "%s" is not writable.', $directory));
        }

        return $file;
    }

    /**
     * Saves the uploaded file.
     *
     * This method can throw exceptions if there is a problem when saving the file.
     *
     * If you don't pass a file name, it will be generated by the generateFilename method.
     * This will only work if you have passed a path when initializing this instance.
     *
     * @param  string $file      The file path to save the file
     * @param  int    $fileMode  The octal mode to use for the new file
     * @param  bool   $create    Indicates that we should make the directory before moving the file
     * @param  int    $dirMode   The octal mode to use when creating the directory
     *
     * @return string The filename without the $this->path prefix
     *
     * @throws Exception
     */
    public function save($file = null, $fileMode = 0666, $create = true, $dirMode = 0777)
    {
        $file = $this->presave($file, $fileMode, $create, $dirMode);

        move_uploaded_file($this->getTempName(), $file);

        chmod($file, $fileMode);

        $this->savedName = $file;
        return is_null($this->path) ? $file : str_replace($this->path . DIRECTORY_SEPARATOR, '', $file);
    }

    public function generateFilename()
    {
        return md5_file($this->getTempName()).rand(11111, 99999).$this->getExtension($this->getOriginalExtension());
    }
}