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<?php

namespace BaseModule\Models;

/**
 * FileModel is used for working with files
 *
 */
class FileModel extends BaseModel {

    /**
     * Current file
     * @var String File name
     */
    private $file;

    /**
     * Sets current file
     * @param string $fileName
     */
    public function __construct($fileName) {
        $this->file = $fileName;
    }

    /**
     * Sets file name
     * @param string $file filename
     */
    public function setFile($file) {
        $this->file = $file;
    }

    /**
     * Get file name (including rel. path)
     * @return string
     */
    public function getFile() {
        return $this->file;
    }

    /**
     * Creates (and deletes content if the file exists) the file
     */
    public function createFile() {
        file_put_contents($this->file, "");
    }

    /**
     * Append content to the end of file
     * @param String $data content
     */
    public function appendContent($data) {
        file_put_contents($this->file, $data, FILE_APPEND | LOCK_EX);
    }

    /**
     * Return a content saved in the file
     * @return String The content of the file
     */
    public function getContent() {
        return file_get_contents($this->file);
    }

    /**
     * Removes file
     */
    public function deleteFile() {
        unlink($this->file);
    }

    /**
     * Removes content
     */
    public function removeContent() {
        $this->createFile();
        $this->deleteFile();
        $this->createFile();
    }

    /**
     * Deletes all old files (older than a week) from the directory
     * 
     * @param string $path directory path
     * @return boolean returns FALSE just in case the directory doesn't exist
     */
    public static function deleteOldFiles($path) {
        if (substr($path, -1) != DIRECTORY_SEPARATOR) {
            $path .= DIRECTORY_SEPARATOR;
        }
        if (!file_exists($path) || !is_dir($path)) {
            $return = false;
        } else {
            $files = scandir($path);
            foreach ($files as $f) {
                if ($f == "." || $f == "..") {
                    continue;
                }

                $timeDif = time() - filemtime($path . $f);
                if ($timeDif > 7 * 24 * 60 * 60) {
                    $deleteFile = new FileModel($path . $f);
                    $deleteFile->deleteFile();
                }
            }
            $return = true;
        }
        return $return;
    }

    /**
     * Deletes dir completely, including it's content
     *
     * @param string $dir path to directory to delete
     * @return bool true on successful deletion
     */
    public static function deleteDir($dir) {
        $it = new \RecursiveDirectoryIterator($dir, \RecursiveDirectoryIterator::SKIP_DOTS);
        $files = new \RecursiveIteratorIterator($it, \RecursiveIteratorIterator::CHILD_FIRST);
        foreach ($files as $file) {
            if ($file->isDir()) {
                rmdir($file->getRealPath());
            } else {
                unlink($file->getRealPath());
            }
        }
        return rmdir($dir);
    }

}