SeedCalculator.php in Views random seed 8
File
src/SeedCalculator.php
View source
<?php
namespace Drupal\views_random_seed;
use Drupal\Component\Datetime\Time;
use Drupal\Core\KeyValueStore\KeyValueFactoryInterface;
use Drupal\Core\Cache\Cache;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\Site\Settings;
use Symfony\Component\HttpFoundation\Session\Session;
class SeedCalculator {
protected $serverTime;
protected $keyValueStore;
protected $currentUser;
protected $options;
public function __construct(Time $time, KeyValueFactoryInterface $keyValueFactory, AccountInterface $current_user) {
$this->serverTime = $time;
$this->keyValueStore = $keyValueFactory
->get('views_random_seed');
$this->currentUser = $current_user;
}
public function calculateSeed(array $options, string $view_name, string $display, string $db_type) {
$time = $this->serverTime
->getRequestTime();
$seed_name = 'views_seed_name-' . $view_name . '-' . $display;
if (!empty($options['reuse_seed'])) {
$seed_name = 'views_seed_name-' . $options['reuse_seed'];
}
$this->options = $options;
$seed = $this
->getSeed($seed_name);
$this
->debug('Seed in storage: ' . $seed);
$this
->debug('Current time: ' . $time);
$options += [
'user_seed_type' => 'same_per_user',
];
if ($seed === FALSE) {
$this
->debug('No feed in storage, generating.');
$seed = $this
->generateSeed($seed_name, $time, $db_type);
}
if ($options['reset_seed_int'] !== -1) {
$reset_time = $options['reset_seed_int'] === 0 ? $options['reset_seed_custom'] : $options['reset_seed_int'];
$this
->debug('reset time: ' . $reset_time);
$this
->debug('seed time: ' . $seed);
$this
->debug('compare: ' . ($seed + $reset_time));
if ($seed + $reset_time < $time) {
$this
->debug('Resetting seed.');
$seed = $this
->generateSeed($seed_name, $time, $db_type);
Cache::invalidateTags([
"views_random_seed-{$view_name}-{$display}",
]);
}
}
return $seed;
}
protected function generateSeed(string $seed_name, int $time, string $db_type) {
$seed = $this
->createInt($time, $db_type);
$user_seed_type = $this->options['user_seed_type'];
if ($user_seed_type === 'diff_per_user' && ($this->currentUser
->isAuthenticated() || $this->options['anonymous_session'])) {
$this
->debug('Generate diff per user');
$_SESSION[$seed_name] = $seed;
}
else {
$this
->debug('Generate same per user');
$this->keyValueStore
->set($seed_name, $seed);
}
return $seed;
}
protected function createInt(int $time, string $db_type) {
switch ($db_type) {
case 'mysql':
case 'mysqli':
default:
return $time;
case 'pgsql':
return $time / 10000000000;
}
}
protected function getSeed($seed_name) {
$user_seed_type = $this->options['user_seed_type'];
if ($user_seed_type === 'diff_per_user' && ($this->currentUser
->isAuthenticated() || $this->options['anonymous_session'])) {
$this
->debug('getSeed: diff per user');
return $this
->getSeedFromSession($seed_name);
}
else {
$this
->debug('getSeed: same per user');
return $this->keyValueStore
->get($seed_name, FALSE);
}
}
protected function getSeedFromSession($seed_name) {
return $_SESSION[$seed_name] ?? FALSE;
}
protected function debug($string) {
if (Settings::get('views_random_seed_view_messages', FALSE)) {
\Drupal::messenger()
->addMessage($string);
}
}
}