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   1  <?php
   2  /**
   3   *
   4   * This file is part of the phpBB Forum Software package.
   5   *
   6   * @copyright (c) phpBB Limited <https://www.phpbb.com>
   7   * @license GNU General Public License, version 2 (GPL-2.0)
   8   *
   9   * For full copyright and license information, please see
  10   * the docs/CREDITS.txt file.
  11   *
  12   */
  13  
  14  namespace phpbb\lock;
  15  
  16  use phpbb\cache\driver\driver_interface as cache_interface;
  17  use phpbb\config\config;
  18  
  19  class posting
  20  {
  21      /** @var cache_interface */
  22      private $cache;
  23  
  24      /** @var config */
  25      private $config;
  26  
  27      /** @var string */
  28      private $lock_name = '';
  29  
  30      /**
  31       * Constructor for posting lock
  32       *
  33       * @param cache_interface $cache
  34       * @param config $config
  35       */
  36  	public function __construct(cache_interface $cache, config $config)
  37      {
  38          $this->cache = $cache;
  39          $this->config = $config;
  40      }
  41  
  42      /**
  43       * Set lock name
  44       *
  45       * @param int $creation_time Creation time of form, must be checked already
  46       * @param string $form_token Form token used for form, must be checked already
  47       *
  48       * @return void
  49       */
  50  	private function set_lock_name(int $creation_time, string $form_token): void
  51      {
  52          $this->lock_name = sha1(((string) $creation_time) . $form_token) . '_posting_lock';
  53      }
  54  
  55      /**
  56       * Acquire lock for current posting form submission
  57       *
  58       * @param int $creation_time Creation time of form, must be checked already
  59       * @param string $form_token Form token used for form, must be checked already
  60       *
  61       * @return bool True if lock could be acquired, false if not
  62       */
  63  	public function acquire(int $creation_time, string $form_token): bool
  64      {
  65          $this->set_lock_name($creation_time, $form_token);
  66  
  67          // Lock is held for session, cannot acquire it unless special flag for testing is set
  68          if ($this->cache->_exists($this->lock_name) && !$this->config->offsetExists('ci_tests_no_lock_posting'))
  69          {
  70              return false;
  71          }
  72  
  73          $this->cache->put($this->lock_name, true, $this->config['flood_interval']);
  74  
  75          return true;
  76      }
  77  }