TableGarbageCollectionTask.php

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<?php
namespace TYPO3\CMS\Scheduler\Task;

class TableGarbageCollectionTask extends \TYPO3\CMS\Scheduler\Task\AbstractTask {

    public $allTables = FALSE;

    public $numberOfDays = 180;

    public $table = '';

    public function execute() {
        $tableConfigurations = $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['scheduler']['tasks']['TYPO3\\CMS\\Scheduler\\Task\\TableGarbageCollectionTask']['options']['tables'];
        $tableHandled = FALSE;
        foreach ($tableConfigurations as $tableName => $configuration) {
            if ($this->allTables || $tableName === $this->table) {
                $this->handleTable($tableName, $configuration);
                $tableHandled = TRUE;
            }
        }
        if (!$tableHandled) {
            throw new \RuntimeException('TYPO3\\CMS\\Scheduler\\Task\\TableGarbageCollectionTask misconfiguration: ' . $this->table . ' does not exist in configuration', 1308354399);
        }
        return TRUE;
    }

    protected function handleTable($table, array $configuration) {
        if (!empty($configuration['expireField'])) {
            $field = $configuration['expireField'];
            $dateLimit = $GLOBALS['EXEC_TIME'];
            // If expire field value is 0, do not delete
            // Expire field = 0 means no expiration
            $where = $field . ' <= \'' . $dateLimit . '\' AND ' . $field . ' > \'0\'';
        } elseif (!empty($configuration['dateField'])) {
            if (!$this->allTables) {
                $deleteTimestamp = strtotime('-' . $this->numberOfDays . 'days');
            } else {
                if (!isset($configuration['expirePeriod'])) {
                    throw new \RuntimeException('TYPO3\\CMS\\Scheduler\\Task\\TableGarbageCollectionTask misconfiguration: No expirePeriod defined for table ' . $table, 1308355095);
                }
                $deleteTimestamp = strtotime('-' . $configuration['expirePeriod'] . 'days');
            }
            $where = $configuration['dateField'] . ' < ' . $deleteTimestamp;
        } else {
            throw new \RuntimeException('TYPO3\\CMS\\Scheduler\\Task\\TableGarbageCollectionTask misconfiguration: Either expireField or dateField must be defined for table ' . $table, 1308355268);
        }
        $GLOBALS['TYPO3_DB']->exec_DELETEquery($table, $where);
        $error = $GLOBALS['TYPO3_DB']->sql_error();
        if ($error) {
            throw new \RuntimeException('TYPO3\\CMS\\Scheduler\\Task\\TableGarbageCollectionTask failed for table ' . $this->table . ' with error: ' . $error, 1308255491);
        }
        return TRUE;
    }

    public function getAdditionalInformation() {
        if ($this->allTables) {
            $message = $GLOBALS['LANG']->sL('LLL:EXT:scheduler/mod1/locallang.xlf:label.tableGarbageCollection.additionalInformationAllTables');
        } else {
            $message = sprintf($GLOBALS['LANG']->sL('LLL:EXT:scheduler/mod1/locallang.xlf:label.tableGarbageCollection.additionalInformationTable'), $this->table);
        }
        return $message;
    }

}