* * This file is part of PhpWiki. * * PhpWiki is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * PhpWiki is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with PhpWiki; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ class ArchiveCleaner { function ArchiveCleaner($expire_params) { $this->expire_params = $expire_params; } function isMergeable($revision) { if (!$revision->get('is_minor_edit')) return false; $page = $revision->getPage(); $author_id = $revision->get('author_id'); $previous = $page->getRevisionBefore($revision, false); return !empty($author_id) && $author_id == $previous->get('author_id'); } function cleanDatabase($dbi) { $iter = $dbi->getAllPages(); while ($page = $iter->next()) $this->cleanPageRevisions($page); } function cleanPageRevisions($page) { $INFINITY = 0x7fffffff; $expire = &$this->expire_params; foreach (array('major', 'minor', 'author') as $class) $counter[$class] = new ArchiveCleaner_Counter($expire[$class]); // shortcut to keep all if (($counter['minor']->min_keep == $INFINITY) and ($counter['major']->min_keep == $INFINITY) ) return; $authors_seen = array(); $current = $page->getCurrentRevision(false); for ($revision = $page->getRevisionBefore($current, false); $revision->getVersion() > 0; $revision = $page->getRevisionBefore($revision, false)) { if ($revision->get('is_minor_edit')) $keep = $counter['minor']->keep($revision); else $keep = $counter['major']->keep($revision); if ($this->isMergeable($revision)) { if (!$keep) { $page->mergeRevision($revision); } } else { $author_id = $revision->get('author_id'); if (empty($authors_seen[$author_id])) { if ($counter['author']->keep($revision)) $keep = true; $authors_seen[$author_id] = true; } if (!$keep) { $page->deleteRevision($revision); } } } } } /** * @access private */ class ArchiveCleaner_Counter { function ArchiveCleaner_Counter($params) { if (!empty($params)) extract($params); $INFINITY = 0x7fffffff; $this->max_keep = isset($max_keep) ? $max_keep : $INFINITY; $this->min_age = isset($min_age) ? $min_age : 0; $this->min_keep = isset($min_keep) ? $min_keep : 0; $this->max_age = isset($max_age) ? $max_age : $INFINITY; $this->keep = isset($keep) ? $keep : $INFINITY; if ($this->keep > $this->max_keep) $this->keep = $this->max_keep; if ($this->min_keep == $INFINITY) { // shortcut to keep all $this->max_keep = $this->keep = $this->min_age = $this->max_age = $INFINITY; } if ($this->min_keep > $this->keep) $this->min_keep = $this->keep; if ($this->min_age > $this->max_age) $this->min_age = $this->max_age; $this->now = time(); $this->count = 0; $this->previous_supplanted = false; } function computeAge($revision) { $supplanted = $revision->get('_supplanted'); if (!$supplanted) { // Every revision but the most recent should have a supplanted time. // However, if it doesn't... trigger_error(sprintf("Warning: Page ā€œ%sā€, version '%d' has no '_supplanted' timestamp", $revision->getPageName(), $revision->getVersion()), E_USER_NOTICE); // Assuming revisions are chronologically ordered, the previous // supplanted time is a good value to use... if ($this->previous_supplanted > 0) $supplanted = $this->previous_supplanted; else { // no supplanted timestamp. // don't delete this revision based on age. return 0; } } $this->previous_supplanted = $supplanted; return ($this->now - $supplanted) / (24 * 3600); } function keep($revision) { $INFINITY = 0x7fffffff; if ($this->min_keep == $INFINITY) return true; $count = ++$this->count; $age = $this->computeAge($revision); if ($count > $this->max_keep) return false; if ($age <= $this->min_age || $count <= $this->min_keep) return true; return $age <= $this->max_age && $count <= $this->keep; } } // Local Variables: // mode: php // tab-width: 8 // c-basic-offset: 4 // c-hanging-comment-ender-p: nil // indent-tabs-mode: nil // End: