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- <?php
- /**
- * Elgg log rotator.
- *
- * @package ElggLogRotate
- */
- elgg_register_event_handler('init', 'system', 'logrotate_init');
- function logrotate_init() {
- $period = elgg_get_plugin_setting('period', 'logrotate');
- $delete = elgg_get_plugin_setting('delete', 'logrotate');
- switch ($period) {
- case 'weekly':
- case 'monthly' :
- case 'yearly' :
- break;
- default:
- $period = 'monthly';
- }
- // Register cron hook for archival of logs
- elgg_register_plugin_hook_handler('cron', $period, 'logrotate_archive_cron');
- if ($delete != 'never') {
- // Register cron hook for deletion of selected archived logs
- elgg_register_plugin_hook_handler('cron', $delete, 'logrotate_delete_cron');
- }
- }
- /**
- * Trigger the log rotation.
- */
- function logrotate_archive_cron($hook, $entity_type, $returnvalue, $params) {
- $resulttext = elgg_echo("logrotate:logrotated");
- $day = 86400;
- $offset = 0;
- $period = elgg_get_plugin_setting('period', 'logrotate');
- switch ($period) {
- case 'weekly':
- $offset = $day * 7;
- break;
- case 'yearly':
- $offset = $day * 365;
- break;
- case 'monthly':
- default:
- // assume 28 days even if a month is longer. Won't cause data loss.
- $offset = $day * 28;
- }
- if (!archive_log($offset)) {
- $resulttext = elgg_echo("logrotate:lognotrotated");
- }
- return $returnvalue . $resulttext;
- }
- /**
- * Trigger the log deletion.
- */
- function logrotate_delete_cron($hook, $entity_type, $returnvalue, $params) {
- $resulttext = elgg_echo("logrotate:logdeleted");
- $day = 86400;
- $offset = 0;
- $period = elgg_get_plugin_setting('delete', 'logrotate');
- switch ($period) {
- case 'weekly':
- $offset = $day * 7;
- break;
- case 'yearly':
- $offset = $day * 365;
- break;
- case 'monthly':
- default:
- // assume 28 days even if a month is longer. Won't cause data loss.
- $offset = $day * 28;
- }
- if (!log_browser_delete_log($offset)) {
- $resulttext = elgg_echo("logrotate:lognotdeleted");
- }
- return $returnvalue . $resulttext;
- }
- /**
- * This function deletes archived copies of the system logs that are older than specified.
- *
- * @param int $time_of_delete An offset in seconds from now to delete log tables
- * @return bool Were any log tables deleted
- */
- function log_browser_delete_log($time_of_delete) {
- global $CONFIG;
- $cutoff = time() - (int)$time_of_delete;
- $deleted_tables = false;
- $results = get_data("SHOW TABLES like '{$CONFIG->dbprefix}system_log_%'");
- if ($results) {
- foreach ($results as $result) {
- $data = (array)$result;
- $table_name = array_shift($data);
- // extract log table rotation time
- $log_time = str_replace("{$CONFIG->dbprefix}system_log_", '', $table_name);
- if ($log_time < $cutoff) {
- if (delete_data("DROP TABLE $table_name") !== false) {
- // delete_data returns 0 when dropping a table (false for failure)
- $deleted_tables = true;
- } else {
- elgg_log("Failed to delete the log table $table_name", 'ERROR');
- }
- }
- }
- }
- return $deleted_tables;
- }
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