+/**
+ * @brief Remove orphaned database entries
+ * @param integer $stage What should be deleted?
+ *
+ * Values for $stage:
+ * ------------------
+ * 1: Old global item entries from item table without user copy.
+ * 2: Items without parents.
+ * 3: Orphaned data from thread table.
+ * 4: Orphaned data from notify table.
+ * 5: Orphaned data from notify-threads table.
+ * 6: Orphaned data from sign table.
+ * 7: Orphaned data from term table.
+ * 8: Expired threads.
+ * 9: Old global item entries from expired threads
+ */
+function remove_orphans($stage = 0) {
+ global $db;
+
+ $count = 0;
+
+ // We split the deletion in many small tasks
+ $limit = 1000;
+
+ // Get the expire days for step 8 and 9
+ $days = Config::get('system', 'dbclean-expire-days', 0);
+
+ if ($stage == 1) {
+ $last_id = Config::get('system', 'dbclean-last-id-1', 0);
+
+ logger("Deleting old global item entries from item table without user copy. Last ID: ".$last_id);
+ $r = dba::p("SELECT `id` FROM `item` WHERE `uid` = 0 AND
+ NOT EXISTS (SELECT `guid` FROM `item` AS `i` WHERE `item`.`guid` = `i`.`guid` AND `i`.`uid` != 0) AND
+ `received` < UTC_TIMESTAMP() - INTERVAL 90 DAY AND `id` >= ?
+ ORDER BY `id` LIMIT ".intval($limit), $last_id);
+ $count = dba::num_rows($r);
+ if ($count > 0) {
+ logger("found global item orphans: ".$count);
+ while ($orphan = dba::fetch($r)) {
+ $last_id = $orphan["id"];
+ dba::delete('item', array('id' => $orphan["id"]));
+ }
+ } else {
+ logger("No global item orphans found");
+ }
+ dba::close($r);
+ logger("Done deleting ".$count." old global item entries from item table without user copy. Last ID: ".$last_id);
+
+ Config::set('system', 'dbclean-last-id-1', $last_id);
+ } elseif ($stage == 2) {
+ $last_id = Config::get('system', 'dbclean-last-id-2', 0);
+
+ logger("Deleting items without parents. Last ID: ".$last_id);
+ $r = dba::p("SELECT `id` FROM `item`
+ WHERE NOT EXISTS (SELECT `id` FROM `item` AS `i` WHERE `item`.`parent` = `i`.`id`)
+ AND `id` >= ? ORDER BY `id` LIMIT ".intval($limit), $last_id);
+ $count = dba::num_rows($r);
+ if ($count > 0) {
+ logger("found item orphans without parents: ".$count);
+ while ($orphan = dba::fetch($r)) {
+ $last_id = $orphan["id"];
+ dba::delete('item', array('id' => $orphan["id"]));
+ }
+ } else {
+ logger("No item orphans without parents found");
+ }
+ dba::close($r);
+ logger("Done deleting ".$count." items without parents. Last ID: ".$last_id);
+
+ Config::set('system', 'dbclean-last-id-2', $last_id);
+
+ if ($count < $limit) {
+ Config::set('system', 'finished-dbclean-2', true);
+ }
+ } elseif ($stage == 3) {
+ $last_id = Config::get('system', 'dbclean-last-id-3', 0);
+
+ logger("Deleting orphaned data from thread table. Last ID: ".$last_id);
+ $r = dba::p("SELECT `iid` FROM `thread`
+ WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`parent` = `thread`.`iid`) AND `iid` >= ?
+ ORDER BY `iid` LIMIT ".intval($limit), $last_id);
+ $count = dba::num_rows($r);
+ if ($count > 0) {
+ logger("found thread orphans: ".$count);
+ while ($orphan = dba::fetch($r)) {
+ $last_id = $orphan["iid"];
+ dba::delete('thread', array('iid' => $orphan["iid"]));
+ }
+ } else {
+ logger("No thread orphans found");
+ }
+ dba::close($r);
+ logger("Done deleting ".$count." orphaned data from thread table. Last ID: ".$last_id);
+
+ Config::set('system', 'dbclean-last-id-3', $last_id);
+
+ if ($count < $limit) {
+ Config::set('system', 'finished-dbclean-3', true);
+ }
+ } elseif ($stage == 4) {
+ $last_id = Config::get('system', 'dbclean-last-id-4', 0);
+
+ logger("Deleting orphaned data from notify table. Last ID: ".$last_id);
+ $r = dba::p("SELECT `iid`, `id` FROM `notify`
+ WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `notify`.`iid`) AND `id` >= ?
+ ORDER BY `id` LIMIT ".intval($limit), $last_id);
+ $count = dba::num_rows($r);
+ if ($count > 0) {
+ logger("found notify orphans: ".$count);
+ while ($orphan = dba::fetch($r)) {
+ $last_id = $orphan["id"];
+ dba::delete('notify', array('iid' => $orphan["iid"]));
+ }
+ } else {
+ logger("No notify orphans found");
+ }
+ dba::close($r);
+ logger("Done deleting ".$count." orphaned data from notify table. Last ID: ".$last_id);
+
+ Config::set('system', 'dbclean-last-id-4', $last_id);
+
+ if ($count < $limit) {
+ Config::set('system', 'finished-dbclean-4', true);
+ }
+ } elseif ($stage == 5) {
+ $last_id = Config::get('system', 'dbclean-last-id-5', 0);
+
+ logger("Deleting orphaned data from notify-threads table. Last ID: ".$last_id);
+ $r = dba::p("SELECT `id` FROM `notify-threads`
+ WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`parent` = `notify-threads`.`master-parent-item`) AND `id` >= ?
+ ORDER BY `id` LIMIT ".intval($limit), $last_id);
+ $count = dba::num_rows($r);
+ if ($count > 0) {
+ logger("found notify-threads orphans: ".$count);
+ while ($orphan = dba::fetch($r)) {
+ $last_id = $orphan["id"];
+ dba::delete('notify-threads', array('id' => $orphan["id"]));
+ }
+ } else {
+ logger("No notify-threads orphans found");
+ }
+ dba::close($r);
+ logger("Done deleting ".$count." orphaned data from notify-threads table. Last ID: ".$last_id);
+
+ Config::set('system', 'dbclean-last-id-5', $last_id);
+
+ if ($count < $limit) {
+ Config::set('system', 'finished-dbclean-5', true);
+ }
+ } elseif ($stage == 6) {
+ $last_id = Config::get('system', 'dbclean-last-id-6', 0);
+
+ logger("Deleting orphaned data from sign table. Last ID: ".$last_id);
+ $r = dba::p("SELECT `iid`, `id` FROM `sign`
+ WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `sign`.`iid`) AND `id` >= ?
+ ORDER BY `id` LIMIT ".intval($limit), $last_id);
+ $count = dba::num_rows($r);
+ if ($count > 0) {
+ logger("found sign orphans: ".$count);
+ while ($orphan = dba::fetch($r)) {
+ $last_id = $orphan["id"];
+ dba::delete('sign', array('iid' => $orphan["iid"]));
+ }
+ } else {
+ logger("No sign orphans found");
+ }
+ dba::close($r);
+ logger("Done deleting ".$count." orphaned data from sign table. Last ID: ".$last_id);
+
+ Config::set('system', 'dbclean-last-id-6', $last_id);
+
+ if ($count < $limit) {
+ Config::set('system', 'finished-dbclean-6', true);
+ }
+ } elseif ($stage == 7) {
+ $last_id = Config::get('system', 'dbclean-last-id-7', 0);
+
+ logger("Deleting orphaned data from term table. Last ID: ".$last_id);
+ $r = dba::p("SELECT `oid`, `tid` FROM `term`
+ WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `term`.`oid`) AND `tid` >= ?
+ ORDER BY `tid` LIMIT ".intval($limit), $last_id);
+ $count = dba::num_rows($r);
+ if ($count > 0) {
+ logger("found term orphans: ".$count);
+ while ($orphan = dba::fetch($r)) {
+ $last_id = $orphan["tid"];
+ dba::delete('term', array('oid' => $orphan["oid"]));
+ }
+ } else {
+ logger("No term orphans found");
+ }
+ dba::close($r);
+ logger("Done deleting ".$count." orphaned data from term table. Last ID: ".$last_id);
+
+ Config::set('system', 'dbclean-last-id-7', $last_id);
+
+ if ($count < $limit) {
+ Config::set('system', 'finished-dbclean-7', true);
+ }
+ } elseif ($stage == 8) {
+ if ($days <= 0) {
+ return;
+ }