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<?php
/**
 * @package    Joomla.Cli
 *
 * @copyright  (C) 2011 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

/**
 * Smart Search CLI.
 *
 * This is a command-line script to help with management of Smart Search.
 *
 * Called with no arguments: php finder_indexer.php
 *                           Performs an incremental update of the index using dynamic pausing.
 *
 * IMPORTANT NOTE:  since Joomla version 3.9.12 the default behavior of this script has changed.
 *                  If called with no arguments, the `--pause` argument is silently applied, in order to avoid the possibility of
 *                  stressing the server too much and making a site (or multiple sites, if on a shared environment) unresponsive.
 *                  If a pause is unwanted, just apply `--pause=0` to the command
 *
 * Called with --purge       php finder_indexer.php --purge
 *                           Purges and rebuilds the index (search filters are preserved).
 *
 * Called with --pause           `php finder_indexer.php --pause`
 *          or --pause=x         or `php finder_indexer.php --pause=x` where x = seconds.
 *          or --pause=division  or `php finder_indexer.php --pause=division` The default divisor is 5.
 *                               If another divisor is required, it can be set with --divisor=y, where
 *                               y is the integer divisor
 *
 *                               This will pause for x seconds between batches,
 *                               in order to give the server some time to catch up
 *                               if --pause is called without an assignment, it defaults to dynamic pausing
 *                               using the division method with a divisor of 5
 *                               (eg. 1 second pause for every 5 seconds of batch processing time)
 *
 * Called with --minproctime=x   Will set the minimum processing time of batches for a pause to occur. Defaults to 1
 *
 */

// We are a valid entry point.
const _JEXEC = 1;

// Load system defines
if (file_exists(dirname(__DIR__) . '/defines.php'))
{
	require_once dirname(__DIR__) . '/defines.php';
}

if (!defined('_JDEFINES'))
{
	define('JPATH_BASE', dirname(__DIR__));
	require_once JPATH_BASE . '/includes/defines.php';
}

define('JPATH_COMPONENT_ADMINISTRATOR', JPATH_ADMINISTRATOR . '/components/com_finder');

// Get the framework.
require_once JPATH_LIBRARIES . '/import.legacy.php';

// Bootstrap the CMS libraries.
require_once JPATH_LIBRARIES . '/cms.php';

// Import the configuration.
require_once JPATH_CONFIGURATION . '/configuration.php';

// System configuration.
$config = new JConfig;
define('JDEBUG', $config->debug);

// Configure error reporting to maximum for CLI output.
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Load Library language
$lang = JFactory::getLanguage();

// Try the finder_cli file in the current language (without allowing the loading of the file in the default language)
$lang->load('finder_cli', JPATH_SITE, null, false, false)
// Fallback to the finder_cli file in the default language
|| $lang->load('finder_cli', JPATH_SITE, null, true);

/**
 * A command line cron job to run the Smart Search indexer.
 *
 * @since  2.5
 */
class FinderCli extends JApplicationCli
{
	/**
	 * Start time for the index process
	 *
	 * @var    string
	 * @since  2.5
	 */
	private $time;

/**
	 * Start time for each batch
	 *
	 * @var    string
	 * @since  2.5
	 */
	private $qtime;

/**
	 * Static filters information.
	 *
	 * @var    array
	 * @since  3.3
	 */
	private $filters = array();

/**
	 * Pausing type or defined pause time in seconds.
	 * One pausing type is implemented: 'division' for dynamic calculation of pauses
	 *
	 * Defaults to 'division'
	 *
	 * @var    string|integer
	 * @since  3.9.12
	 */
	private $pause = 'division';

/**
	 * The divisor of the division: batch-processing time / divisor.
	 * This is used together with --pause=division in order to pause dynamically
	 * in relation to the processing time
	 * Defaults to 5
	 *
	 * @var    integer
	 * @since  3.9.12
	 */
	private $divisor = 5;

/**
	 * Minimum processing time in seconds, in order to apply a pause
	 * Defaults to 1
	 *
	 * @var    integer
	 * @since  3.9.12
	 */
	private $minimumBatchProcessingTime = 1;

/**
	 * Entry point for Smart Search CLI script
	 *
	 * @return  void
	 *
	 * @since   2.5
	 */
	public function doExecute()
	{
		// Print a blank line.
		$this->out(JText::_('FINDER_CLI'));
		$this->out('============================');

// Initialize the time value.
		$this->time = microtime(true);

// Remove the script time limit.
		@set_time_limit(0);

// Fool the system into thinking we are running as JSite with Smart Search as the active component.
		$_SERVER['HTTP_HOST'] = 'domain.com';
		JFactory::getApplication('site');

$this->minimumBatchProcessingTime = $this->input->getInt('minproctime', 1);

// Pause between batches to let the server catch a breath. The default, if not set by the user, is set in the class property `pause`
		$pauseArg = $this->input->get('pause', $this->pause, 'raw');

if ($pauseArg === 'division')
		{
			$this->divisor = $this->input->getInt('divisor', $this->divisor);
		}
		else
		{
			$this->pause = (int) $pauseArg;
		}

// Purge before indexing if --purge on the command line.
		if ($this->input->getString('purge', false))
		{
			// Taxonomy ids will change following a purge/index, so save filter information first.
			$this->getFilters();

// Purge the index.
			$this->purge();

// Run the indexer.
			$this->index();

// Restore the filters again.
			$this->putFilters();
		}
		else
		{
			// Run the indexer.
			$this->index();
		}

// Total reporting.
		$this->out(JText::sprintf('FINDER_CLI_PROCESS_COMPLETE', round(microtime(true) - $this->time, 3)), true);
		$this->out(JText::sprintf('FINDER_CLI_PEAK_MEMORY_USAGE', number_format(memory_get_peak_usage(true))));

// Print a blank line at the end.
		$this->out();
	}

/**
	 * Run the indexer.
	 *
	 * @return  void
	 *
	 * @since   2.5
	 */
	private function index()
	{
		JLoader::register('FinderIndexer', JPATH_ADMINISTRATOR . '/components/com_finder/helpers/indexer/indexer.php');

// Disable caching.
		$config = JFactory::getConfig();
		$config->set('caching', 0);
		$config->set('cache_handler', 'file');

// Reset the indexer state.
		FinderIndexer::resetState();

// Import the plugins.
		JPluginHelper::importPlugin('system');
		JPluginHelper::importPlugin('finder');

// Starting Indexer.
		$this->out(JText::_('FINDER_CLI_STARTING_INDEXER'), true);

// Trigger the onStartIndex event.
		JEventDispatcher::getInstance()->trigger('onStartIndex');

// Remove the script time limit.
		@set_time_limit(0);

// Get the indexer state.
		$state = FinderIndexer::getState();

// Setting up plugins.
		$this->out(JText::_('FINDER_CLI_SETTING_UP_PLUGINS'), true);

// Trigger the onBeforeIndex event.
		JEventDispatcher::getInstance()->trigger('onBeforeIndex');

// Startup reporting.
		$this->out(JText::sprintf('FINDER_CLI_SETUP_ITEMS', $state->totalItems, round(microtime(true) - $this->time, 3)), true);

// Get the number of batches.
		$t = (int) $state->totalItems;
		$c = (int) ceil($t / $state->batchSize);
		$c = $c === 0 ? 1 : $c;

try
		{
			// Process the batches.
			for ($i = 0; $i < $c; $i++)
			{
				// Set the batch start time.
				$this->qtime = microtime(true);

// Reset the batch offset.
				$state->batchOffset = 0;

// Trigger the onBuildIndex event.
				JEventDispatcher::getInstance()->trigger('onBuildIndex');

// Batch reporting.
				$this->out(JText::sprintf('FINDER_CLI_BATCH_COMPLETE', $i + 1, $processingTime = round(microtime(true) - $this->qtime, 3)), true);

if ($this->pause !== 0)
				{
					// Pausing Section
					$skip  = !($processingTime >= $this->minimumBatchProcessingTime);
					$pause = 0;

if ($this->pause === 'division' && $this->divisor > 0)
					{
						if (!$skip)
						{
							$pause = round($processingTime / $this->divisor);
						}
						else
						{
							$pause = 1;
						}
					}
					elseif ($this->pause > 0)
					{
						$pause = $this->pause;
					}

if ($pause > 0 && !$skip)
					{
						$this->out(JText::sprintf('FINDER_CLI_BATCH_PAUSING', $pause), true);
						sleep($pause);
						$this->out(JText::_('FINDER_CLI_BATCH_CONTINUING'));
					}

if ($skip)
					{
						$this->out(JText::sprintf('FINDER_CLI_SKIPPING_PAUSE_LOW_BATCH_PROCESSING_TIME', $processingTime, $this->minimumBatchProcessingTime), true);
					}
					// End of Pausing Section
				}
			}
		}
		catch (Exception $e)
		{
			// Display the error
			$this->out($e->getMessage(), true);

// Reset the indexer state.
			FinderIndexer::resetState();

// Close the app
			$this->close($e->getCode());
		}

// Reset the indexer state.
		FinderIndexer::resetState();
	}

/**
	 * Purge the index.
	 *
	 * @return  void
	 *
	 * @since   3.3
	 */
	private function purge()
	{
		$this->out(JText::_('FINDER_CLI_INDEX_PURGE'));

// Load the model.
		JModelLegacy::addIncludePath(JPATH_COMPONENT_ADMINISTRATOR . '/models', 'FinderModel');
		$model = JModelLegacy::getInstance('Index', 'FinderModel');

// Attempt to purge the index.
		$return = $model->purge();

// If unsuccessful then abort.
		if (!$return)
		{
			$message = JText::_('FINDER_CLI_INDEX_PURGE_FAILED', $model->getError());
			$this->out($message);
			exit();
		}

$this->out(JText::_('FINDER_CLI_INDEX_PURGE_SUCCESS'));
	}

/**
	 * Restore static filters.
	 *
	 * Using the saved filter information, update the filter records
	 * with the new taxonomy ids.
	 *
	 * @return  void
	 *
	 * @since   3.3
	 */
	private function putFilters()
	{
		$this->out(JText::_('FINDER_CLI_RESTORE_FILTERS'));

$db = JFactory::getDbo();

// Use the temporary filter information to update the filter taxonomy ids.
		foreach ($this->filters as $filter_id => $filter)
		{
			$tids = array();

foreach ($filter as $element)
			{
				// Look for the old taxonomy in the new taxonomy table.
				$query = $db->getQuery(true);
				$query
					->select('t.id')
					->from($db->qn('#__finder_taxonomy') . ' AS t')
					->leftJoin($db->qn('#__finder_taxonomy') . ' AS p ON p.id = t.parent_id')
					->where($db->qn('t.title') . ' = ' . $db->q($element['title']))
					->where($db->qn('p.title') . ' = ' . $db->q($element['parent']));
				$taxonomy = $db->setQuery($query)->loadResult();

// If we found it then add it to the list.
				if ($taxonomy)
				{
					$tids[] = $taxonomy;
				}
				else
				{
					$this->out(JText::sprintf('FINDER_CLI_FILTER_RESTORE_WARNING', $element['parent'], $element['title'], $element['filter']));
				}
			}

// Construct a comma-separated string from the taxonomy ids.
			$taxonomyIds = empty($tids) ? '' : implode(',', $tids);

// Update the filter with the new taxonomy ids.
			$query = $db->getQuery(true);
			$query
				->update($db->qn('#__finder_filters'))
				->set($db->qn('data') . ' = ' . $db->q($taxonomyIds))
				->where($db->qn('filter_id') . ' = ' . (int) $filter_id);
			$db->setQuery($query)->execute();
		}

$this->out(JText::sprintf('FINDER_CLI_RESTORE_FILTER_COMPLETED', count($this->filters)));
	}

/**
	 * Save static filters.
	 *
	 * Since a purge/index cycle will cause all the taxonomy ids to change,
	 * the static filters need to be updated with the new taxonomy ids.
	 * The static filter information is saved prior to the purge/index
	 * so that it can later be used to update the filters with new ids.
	 *
	 * @return  void
	 *
	 * @since   3.3
	 */
	private function getFilters()
	{
		$this->out(JText::_('FINDER_CLI_SAVE_FILTERS'));

// Get the taxonomy ids used by the filters.
		$db    = JFactory::getDbo();
		$query = $db->getQuery(true);
		$query
			->select('filter_id, title, data')
			->from($db->qn('#__finder_filters'));
		$filters = $db->setQuery($query)->loadObjectList();

// Get the name of each taxonomy and the name of its parent.
		foreach ($filters as $filter)
		{
			// Skip empty filters.
			if ($filter->data === '')
			{
				continue;
			}

// Get taxonomy records.
			$query = $db->getQuery(true);
			$query
				->select('t.title, p.title AS parent')
				->from($db->qn('#__finder_taxonomy') . ' AS t')
				->leftJoin($db->qn('#__finder_taxonomy') . ' AS p ON p.id = t.parent_id')
				->where($db->qn('t.id') . ' IN (' . $filter->data . ')');
			$taxonomies = $db->setQuery($query)->loadObjectList();

// Construct a temporary data structure to hold the filter information.
			foreach ($taxonomies as $taxonomy)
			{
				$this->filters[$filter->filter_id][] = array(
					'filter' => $filter->title,
					'title'  => $taxonomy->title,
					'parent' => $taxonomy->parent,
				);
			}
		}

$this->out(JText::sprintf('FINDER_CLI_SAVE_FILTER_COMPLETED', count($filters)));
	}
}

// Instantiate the application object, passing the class name to JCli::getInstance
// and use chaining to execute the application.
JApplicationCli::getInstance('FinderCli')->execute();

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