www/include/FileHandler.php
<?php

// Copyright 2020 Catchpoint Systems Inc.
// Use of this source code is governed by the Polyform Shield 1.0.0 license that can be
// found in the LICENSE.md file.

/**
 * Class to abstract and encapsulate file related functions
 */
class FileHandler
{
  /**
   * @param string $path The path to check
   * @return bool True if the file exists, false otherwise
   */
    public function fileExists($path)
    {
        return is_file($path);
    }

  /**
   * @param string $path The path to check
   * @return bool True if the directory exists, false otherwise
   */
    public function dirExists($path)
    {
        return is_dir($path);
    }

  /**
   * @param string $path The path to check
   * @return bool True if the file exists with given path, or with additional ".gz" extension, false otherwise
   */
    public function gzFileExists($path)
    {
        return $this->fileExists($path . ".gz") || $this->fileExists($path);
    }

    public function gzReadFile($path)
    {
        if ($this->fileExists("$path.gz")) {
            return gzfile("$path.gz");
        } elseif ($this->fileExists($path)) {
            return file($path);
        }
        return null;
    }
}
