2 rcs_id('$Id: WikiDB.php,v 1.108 2004-11-23 13:35:31 rurban Exp $');
4 require_once('lib/PageType.php');
7 * The classes in the file define the interface to the
11 * @author Geoffrey T. Dairiki <dairiki@dairiki.org>
16 * Force the creation of a new revision.
17 * @see WikiDB_Page::createRevision()
19 if (!defined('WIKIDB_FORCE_CREATE'))
20 define('WIKIDB_FORCE_CREATE', -1);
23 * Abstract base class for the database used by PhpWiki.
25 * A <tt>WikiDB</tt> is a container for <tt>WikiDB_Page</tt>s which in
26 * turn contain <tt>WikiDB_PageRevision</tt>s.
28 * Conceptually a <tt>WikiDB</tt> contains all possible
29 * <tt>WikiDB_Page</tt>s, whether they have been initialized or not.
30 * Since all possible pages are already contained in a WikiDB, a call
31 * to WikiDB::getPage() will never fail (barring bugs and
32 * e.g. filesystem or SQL database problems.)
34 * Also each <tt>WikiDB_Page</tt> always contains at least one
35 * <tt>WikiDB_PageRevision</tt>: the default content (e.g. "Describe
36 * [PageName] here."). This default content has a version number of
39 * <tt>WikiDB_PageRevision</tt>s have read-only semantics. One can
40 * only create new revisions or delete old ones --- one can not modify
41 * an existing revision.
45 * Open a WikiDB database.
47 * This is a static member function. This function inspects its
48 * arguments to determine the proper subclass of WikiDB to
49 * instantiate, and then it instantiates it.
53 * @param hash $dbparams Database configuration parameters.
54 * Some pertinent paramters are:
57 * <dd> The back-end type. Current supported types are:
60 * <dd> Generic SQL backend based on the PEAR/DB database abstraction
61 * library. (More stable and conservative)
63 * <dd> Another generic SQL backend. (More current features are tested here. Much faster)
65 * <dd> Dba based backend. The default and by far the fastest.
73 * <dd> (Used by the SQL and ADODB backends.)
74 * The DSN specifying which database to connect to.
77 * <dd> Prefix to be prepended to database tables (and file names).
80 * <dd> (Used by the dba backend.)
81 * Which directory db files reside in.
84 * <dd> Used only by the dba backend so far.
85 * And: When optimizing mysql it closes timed out mysql processes.
86 * otherwise only used for dba: Timeout in seconds for opening (and
87 * obtaining lock) on the dbm file.
90 * <dd> (Used by the dba backend.)
92 * Which dba handler to use. Good choices are probably either
96 * @return WikiDB A WikiDB object.
98 function open ($dbparams) {
99 $dbtype = $dbparams{'dbtype'};
100 include_once("lib/WikiDB/$dbtype.php");
102 $class = 'WikiDB_' . $dbtype;
103 return new $class ($dbparams);
113 function WikiDB (&$backend, $dbparams) {
114 $this->_backend = &$backend;
115 // don't do the following with the auth_dsn!
116 if (isset($dbparams['auth_dsn'])) return;
118 $this->_cache = new WikiDB_cache($backend);
119 $GLOBALS['request']->_dbi = $this;
121 // If the database doesn't yet have a timestamp, initialize it now.
122 if ($this->get('_timestamp') === false)
125 //FIXME: devel checking.
126 //$this->_backend->check();
130 * Get any user-level warnings about this WikiDB.
132 * Some back-ends, e.g. by default create there data files in the
133 * global /tmp directory. We would like to warn the user when this
134 * happens (since /tmp files tend to get wiped periodically.)
135 * Warnings such as these may be communicated from specific
136 * back-ends through this method.
140 * @return string A warning message (or <tt>false</tt> if there is
143 function genericWarnings() {
148 * Close database connection.
150 * The database may no longer be used after it is closed.
152 * Closing a WikiDB invalidates all <tt>WikiDB_Page</tt>s,
153 * <tt>WikiDB_PageRevision</tt>s and <tt>WikiDB_PageIterator</tt>s
154 * which have been obtained from it.
159 $this->_backend->close();
160 $this->_cache->close();
164 * Get a WikiDB_Page from a WikiDB.
166 * A {@link WikiDB} consists of the (infinite) set of all possible pages,
167 * therefore this method never fails.
170 * @param string $pagename Which page to get.
171 * @return WikiDB_Page The requested WikiDB_Page.
173 function getPage($pagename) {
174 static $error_displayed = false;
175 $pagename = (string) $pagename;
177 if ($pagename === '') {
178 if ($error_displayed) return false;
179 $error_displayed = true;
180 if (function_exists("xdebug_get_function_stack"))
181 var_dump(xdebug_get_function_stack());
182 trigger_error("empty pagename", E_USER_WARNING);
186 assert($pagename != '');
188 return new WikiDB_Page($this, $pagename);
192 * Determine whether page exists (in non-default form).
195 * $is_page = $dbi->isWikiPage($pagename);
199 * $page = $dbi->getPage($pagename);
200 * $current = $page->getCurrentRevision();
201 * $is_page = ! $current->hasDefaultContents();
203 * however isWikiPage may be implemented in a more efficient
204 * manner in certain back-ends.
208 * @param string $pagename string Which page to check.
210 * @return boolean True if the page actually exists with
211 * non-default contents in the WikiDataBase.
213 function isWikiPage ($pagename) {
214 $page = $this->getPage($pagename);
215 return $page->exists();
219 * Delete page from the WikiDB.
221 * Deletes all revisions of the page from the WikiDB. Also resets
222 * all page meta-data to the default values.
226 * @param string $pagename Name of page to delete.
228 function deletePage($pagename) {
229 $this->_cache->delete_page($pagename);
231 /* Generate notification emails? */
232 if (! $this->isWikiPage($pagename) ) {
233 $notify = $this->get('notify');
234 if (!empty($notify) and is_array($notify)) {
235 //TODO: deferr it (quite a massive load if you remove some pages).
236 //TODO: notification class which catches all changes,
237 // and decides at the end of the request what to mail. (type, page, who, what, users, emails)
238 // could be used for PageModeration also.
239 $page = new WikiDB_Page($this, $pagename);
240 list($emails, $userids) = $page->getPageChangeEmails($notify);
241 if (!empty($emails)) {
242 $editedby = sprintf(_("Removed by: %s"), $GLOBALS['request']->_user->getId()); // Todo: host_id
243 $emails = join(',', $emails);
244 $subject = sprintf(_("Page deleted %s"), urlencode($pagename));
245 if (mail($emails,"[".WIKI_NAME."] ".$subject,
248 "Deleted $pagename"))
249 trigger_error(sprintf(_("PageChange Notification of %s sent to %s"),
250 $pagename, join(',',$userids)), E_USER_NOTICE);
252 trigger_error(sprintf(_("PageChange Notification Error: Couldn't send %s to %s"),
253 $pagename, join(',',$userids)), E_USER_WARNING);
258 //How to create a RecentChanges entry with explaining summary? Dynamically
260 $page = $this->getPage($pagename);
261 $current = $page->getCurrentRevision();
262 $meta = $current->_data;
263 $version = $current->getVersion();
264 $meta['summary'] = _("removed");
265 $page->save($current->getPackedContent(), $version + 1, $meta);
270 * Retrieve all pages.
272 * Gets the set of all pages with non-default contents.
276 * @param boolean $include_defaulted Normally pages whose most
277 * recent revision has empty content are considered to be
278 * non-existant. Unless $include_defaulted is set to true, those
279 * pages will not be returned.
281 * @return WikiDB_PageIterator A WikiDB_PageIterator which contains all pages
282 * in the WikiDB which have non-default contents.
284 function getAllPages($include_empty=false, $sortby=false, $limit=false, $exclude=false) {
285 // HACK: memory_limit=8M will fail on too large pagesets. old php on unix only!
287 $mem = ini_get("memory_limit");
288 if ($mem and !$limit and !isWindows() and !check_php_version(4,3)) {
290 $GLOBALS['request']->setArg('limit',$limit);
291 $GLOBALS['request']->setArg('paging','auto');
294 $result = $this->_backend->get_all_pages($include_empty, $sortby, $limit, $exclude);
295 return new WikiDB_PageIterator($this, $result, array('include_empty' => $include_empty,
296 'exclude' => $exclude,
301 * $include_empty = true: include also empty pages
302 * exclude: comma-seperated list pagenames: TBD: array of pagenames
304 function numPages($include_empty=false, $exclude='') {
305 if (method_exists($this->_backend, 'numPages'))
306 // FIXME: currently are all args ignored.
307 $count = $this->_backend->numPages($include_empty, $exclude);
309 // FIXME: exclude ignored.
310 $iter = $this->getAllPages($include_empty, false, false, $exclude);
311 $count = $iter->count();
320 * Search for pages containing (or not containing) certain words
323 * Pages are returned in alphabetical order whenever it is
324 * practical to do so.
326 * FIXME: clarify $search syntax. provide glob=>TextSearchQuery converters
329 * @param TextSearchQuery $search A TextSearchQuery object
330 * @return WikiDB_PageIterator A WikiDB_PageIterator containing the matching pages.
331 * @see TextSearchQuery
333 function titleSearch($search, $case_exact=false) {
334 $result = $this->_backend->text_search($search, false, $case_exact);
335 return new WikiDB_PageIterator($this, $result);
341 * Search for pages containing (or not containing) certain words
342 * in their entire text (this includes the page content and the
345 * Pages are returned in alphabetical order whenever it is
346 * practical to do so.
350 * @param TextSearchQuery $search A TextSearchQuery object.
351 * @return WikiDB_PageIterator A WikiDB_PageIterator containing the matching pages.
352 * @see TextSearchQuery
354 function fullSearch($search, $case_exact=false) {
355 $result = $this->_backend->text_search($search, 'full_text', $case_exact);
356 return new WikiDB_PageIterator($this, $result);
360 * Find the pages with the greatest hit counts.
362 * Pages are returned in reverse order by hit count.
366 * @param integer $limit The maximum number of pages to return.
367 * Set $limit to zero to return all pages. If $limit < 0, pages will
368 * be sorted in decreasing order of popularity.
370 * @return WikiDB_PageIterator A WikiDB_PageIterator containing the matching
373 function mostPopular($limit = 20, $sortby = '-hits') {
374 $result = $this->_backend->most_popular($limit, $sortby);
375 return new WikiDB_PageIterator($this, $result);
379 * Find recent page revisions.
381 * Revisions are returned in reverse order by creation time.
385 * @param hash $params This hash is used to specify various optional
389 * <dd> (integer) At most this many revisions will be returned.
391 * <dd> (integer) Only revisions since this time (unix-timestamp) will be returned.
392 * <dt> include_minor_revisions
393 * <dd> (boolean) Also include minor revisions. (Default is not to.)
394 * <dt> exclude_major_revisions
395 * <dd> (boolean) Don't include non-minor revisions.
396 * (Exclude_major_revisions implies include_minor_revisions.)
397 * <dt> include_all_revisions
398 * <dd> (boolean) Return all matching revisions for each page.
399 * Normally only the most recent matching revision is returned
403 * @return WikiDB_PageRevisionIterator A WikiDB_PageRevisionIterator containing the
404 * matching revisions.
406 function mostRecent($params = false) {
407 $result = $this->_backend->most_recent($params);
408 return new WikiDB_PageRevisionIterator($this, $result);
414 * @return Iterator A generic iterator containing rows of (duplicate) pagename, wantedfrom.
416 function wantedPages($exclude_from='', $exclude='', $sortby=false, $limit=false) {
417 return $this->_backend->wanted_pages($exclude_from, $exclude, $sortby, $limit);
418 //return new WikiDB_PageIterator($this, $result);
423 * Call the appropriate backend method.
426 * @param string $from Page to rename
427 * @param string $to New name
428 * @param boolean $updateWikiLinks If the text in all pages should be replaced.
429 * @return boolean true or false
431 function renamePage($from, $to, $updateWikiLinks = false) {
432 assert(is_string($from) && $from != '');
433 assert(is_string($to) && $to != '');
435 if (method_exists($this->_backend, 'rename_page')) {
436 $oldpage = $this->getPage($from);
437 $newpage = $this->getPage($to);
438 //update all WikiLinks in existing pages
439 //non-atomic! i.e. if rename fails the links are not undone
440 if ($updateWikiLinks) {
441 require_once('lib/plugin/WikiAdminSearchReplace.php');
442 $links = $oldpage->getBackLinks();
443 while ($linked_page = $links->next()) {
444 WikiPlugin_WikiAdminSearchReplace::replaceHelper($this,$linked_page->getName(),$from,$to);
446 $links = $newpage->getBackLinks();
447 while ($linked_page = $links->next()) {
448 WikiPlugin_WikiAdminSearchReplace::replaceHelper($this,$linked_page->getName(),$from,$to);
451 if ($oldpage->exists() and ! $newpage->exists()) {
452 if ($result = $this->_backend->rename_page($from, $to)) {
453 //create a RecentChanges entry with explaining summary
454 $page = $this->getPage($to);
455 $current = $page->getCurrentRevision();
456 $meta = $current->_data;
457 $version = $current->getVersion();
458 $meta['summary'] = sprintf(_("renamed from %s"), $from);
459 $page->save($current->getPackedContent(), $version + 1, $meta);
461 } elseif (!$oldpage->getCurrentRevision(false) and !$newpage->exists()) {
462 // if a version 0 exists try it also.
463 $result = $this->_backend->rename_page($from, $to);
466 trigger_error(_("WikiDB::renamePage() not yet implemented for this backend"),
469 /* Generate notification emails? */
471 $notify = $this->get('notify');
472 if (!empty($notify) and is_array($notify)) {
473 list($emails, $userids) = $oldpage->getPageChangeEmails($notify);
474 if (!empty($emails)) {
475 $oldpage->sendPageRenameNotification($to, &$meta, $emails, $userids);
482 /** Get timestamp when database was last modified.
484 * @return string A string consisting of two integers,
485 * separated by a space. The first is the time in
486 * unix timestamp format, the second is a modification
487 * count for the database.
489 * The idea is that you can cast the return value to an
490 * int to get a timestamp, or you can use the string value
491 * as a good hash for the entire database.
493 function getTimestamp() {
494 $ts = $this->get('_timestamp');
495 return sprintf("%d %d", $ts[0], $ts[1]);
499 * Update the database timestamp.
503 $ts = $this->get('_timestamp');
504 $this->set('_timestamp', array(time(), $ts[1] + 1));
509 * Access WikiDB global meta-data.
511 * NOTE: this is currently implemented in a hackish and
512 * not very efficient manner.
516 * @param string $key Which meta data to get.
517 * Some reserved meta-data keys are:
519 * <dt>'_timestamp' <dd> Data used by getTimestamp().
522 * @return scalar The requested value, or false if the requested data
526 if (!$key || $key[0] == '%')
529 * Hack Alert: We can use any page (existing or not) to store
530 * this data (as long as we always use the same one.)
532 $gd = $this->getPage('global_data');
533 $data = $gd->get('__global');
535 if ($data && isset($data[$key]))
542 * Set global meta-data.
544 * NOTE: this is currently implemented in a hackish and
545 * not very efficient manner.
550 * @param string $key Meta-data key to set.
551 * @param string $newval New value.
553 function set($key, $newval) {
554 if (!$key || $key[0] == '%')
557 $gd = $this->getPage('global_data');
558 $data = $gd->get('__global');
565 $data[$key] = $newval;
567 $gd->set('__global', $data);
570 /* TODO: these are really backend methods */
572 // SQL result: for simple select or create/update queries
573 // returns the database specific resource type
574 function genericSqlQuery($sql) {
575 if (function_exists('debug_backtrace')) { // >= 4.3.0
576 echo "<pre>", printSimpleTrace(debug_backtrace()), "</pre>\n";
578 trigger_error("no SQL database", E_USER_ERROR);
582 // SQL iter: for simple select or create/update queries
583 // returns the generic iterator object (count,next)
584 function genericSqlIter($sql, $field_list = NULL) {
585 if (function_exists('debug_backtrace')) { // >= 4.3.0
586 echo "<pre>", printSimpleTrace(debug_backtrace()), "</pre>\n";
588 trigger_error("no SQL database", E_USER_ERROR);
592 // see backend upstream methods
593 // ADODB adds surrounding quotes, SQL not yet!
594 function quote ($s) {
600 if (!$request->_dbi) return false;
601 else return false; /* so far only needed for sql so false it.
602 later we have to check dba also */
605 function getParam($param) {
607 if (isset($DBParams[$param])) return $DBParams[$param];
608 elseif ($param == 'prefix') return '';
612 function getAuthParam($param) {
613 global $DBAuthParams;
614 if (isset($DBAuthParams[$param])) return $DBAuthParams[$param];
615 elseif ($param == 'USER_AUTH_ORDER') return $GLOBALS['USER_AUTH_ORDER'];
616 elseif ($param == 'USER_AUTH_POLICY') return $GLOBALS['USER_AUTH_POLICY'];
623 * An abstract base class which representing a wiki-page within a
626 * A WikiDB_Page contains a number (at least one) of
627 * WikiDB_PageRevisions.
631 function WikiDB_Page(&$wikidb, $pagename) {
632 $this->_wikidb = &$wikidb;
633 $this->_pagename = $pagename;
635 if (!(is_string($pagename) and $pagename != '')) {
636 if (function_exists("xdebug_get_function_stack")) {
637 echo "xdebug_get_function_stack(): "; var_dump(xdebug_get_function_stack());
638 } elseif (function_exists("debug_backtrace")) { // >= 4.3.0
639 printSimpleTrace(debug_backtrace());
641 trigger_error("empty pagename", E_USER_WARNING);
645 assert(is_string($pagename) and $pagename != '');
649 * Get the name of the wiki page.
653 * @return string The page name.
656 return $this->_pagename;
659 // To reduce the memory footprint for larger sets of pagelists,
660 // we don't cache the content (only true or false) and
661 // we purge the pagedata (_cached_html) also
663 if (isset($this->_wikidb->_cache->_id_cache[$this->_pagename])) return true;
664 $current = $this->getCurrentRevision(false);
665 return ! $current->hasDefaultContents();
669 * Delete an old revision of a WikiDB_Page.
671 * Deletes the specified revision of the page.
672 * It is a fatal error to attempt to delete the current revision.
676 * @param integer $version Which revision to delete. (You can also
677 * use a WikiDB_PageRevision object here.)
679 function deleteRevision($version) {
680 $backend = &$this->_wikidb->_backend;
681 $cache = &$this->_wikidb->_cache;
682 $pagename = &$this->_pagename;
684 $version = $this->_coerce_to_version($version);
688 $backend->lock(array('page','version'));
689 $latestversion = $cache->get_latest_version($pagename);
690 if ($latestversion && $version == $latestversion) {
691 $backend->unlock(array('page','version'));
692 trigger_error(sprintf("Attempt to delete most recent revision of '%s'",
693 $pagename), E_USER_ERROR);
697 $cache->delete_versiondata($pagename, $version);
698 $backend->unlock(array('page','version'));
702 * Delete a revision, or possibly merge it with a previous
706 * Suppose an author make a (major) edit to a page. Shortly
707 * after that the same author makes a minor edit (e.g. to fix
708 * spelling mistakes he just made.)
710 * Now some time later, where cleaning out old saved revisions,
711 * and would like to delete his minor revision (since there's
712 * really no point in keeping minor revisions around for a long
715 * Note that the text after the minor revision probably represents
716 * what the author intended to write better than the text after
717 * the preceding major edit.
719 * So what we really want to do is merge the minor edit with the
722 * We will only do this when:
724 * <li>The revision being deleted is a minor one, and
725 * <li>It has the same author as the immediately preceding revision.
728 function mergeRevision($version) {
729 $backend = &$this->_wikidb->_backend;
730 $cache = &$this->_wikidb->_cache;
731 $pagename = &$this->_pagename;
733 $version = $this->_coerce_to_version($version);
737 $backend->lock(array('version'));
738 $latestversion = $cache->get_latest_version($pagename);
739 if ($latestversion && $version == $latestversion) {
740 $backend->unlock(array('version'));
741 trigger_error(sprintf("Attempt to merge most recent revision of '%s'",
742 $pagename), E_USER_ERROR);
746 $versiondata = $cache->get_versiondata($pagename, $version, true);
748 // Not there? ... we're done!
749 $backend->unlock(array('version'));
753 if ($versiondata['is_minor_edit']) {
754 $previous = $backend->get_previous_version($pagename, $version);
756 $prevdata = $cache->get_versiondata($pagename, $previous);
757 if ($prevdata['author_id'] == $versiondata['author_id']) {
758 // This is a minor revision, previous version is
759 // by the same author. We will merge the
761 $cache->update_versiondata($pagename, $previous,
762 array('%content' => $versiondata['%content'],
763 '_supplanted' => $versiondata['_supplanted']));
768 $cache->delete_versiondata($pagename, $version);
769 $backend->unlock(array('version'));
774 * Create a new revision of a {@link WikiDB_Page}.
778 * @param int $version Version number for new revision.
779 * To ensure proper serialization of edits, $version must be
780 * exactly one higher than the current latest version.
781 * (You can defeat this check by setting $version to
782 * {@link WIKIDB_FORCE_CREATE} --- not usually recommended.)
784 * @param string $content Contents of new revision.
786 * @param hash $metadata Metadata for new revision.
787 * All values in the hash should be scalars (strings or integers).
789 * @param array $links List of pagenames which this page links to.
791 * @return WikiDB_PageRevision Returns the new WikiDB_PageRevision object. If
792 * $version was incorrect, returns false
794 function createRevision($version, &$content, $metadata, $links) {
795 $backend = &$this->_wikidb->_backend;
796 $cache = &$this->_wikidb->_cache;
797 $pagename = &$this->_pagename;
798 $cache->invalidate_cache($pagename);
800 $backend->lock(array('version','page','recent','link','nonempty'));
802 $latestversion = $backend->get_latest_version($pagename);
803 $newversion = ($latestversion ? $latestversion : 0) + 1;
804 assert($newversion >= 1);
806 if ($version != WIKIDB_FORCE_CREATE and $version != $newversion) {
807 $backend->unlock(array('version','page','recent','link','nonempty'));
813 foreach ($data as $key => $val) {
814 if (empty($val) || $key[0] == '_' || $key[0] == '%')
818 assert(!empty($data['author']));
819 if (empty($data['author_id']))
820 @$data['author_id'] = $data['author'];
822 if (empty($data['mtime']))
823 $data['mtime'] = time();
825 if ($latestversion) {
826 // Ensure mtimes are monotonic.
827 $pdata = $cache->get_versiondata($pagename, $latestversion);
828 if ($data['mtime'] < $pdata['mtime']) {
829 trigger_error(sprintf(_("%s: Date of new revision is %s"),
830 $pagename,"'non-monotonic'"),
832 $data['orig_mtime'] = $data['mtime'];
833 $data['mtime'] = $pdata['mtime'];
836 // FIXME: use (possibly user specified) 'mtime' time or
838 $cache->update_versiondata($pagename, $latestversion,
839 array('_supplanted' => $data['mtime']));
842 $data['%content'] = &$content;
844 $cache->set_versiondata($pagename, $newversion, $data);
846 //$cache->update_pagedata($pagename, array(':latestversion' => $newversion,
847 //':deleted' => empty($content)));
849 $backend->set_links($pagename, $links);
851 $backend->unlock(array('version','page','recent','link','nonempty'));
853 return new WikiDB_PageRevision($this->_wikidb, $pagename, $newversion,
857 /** A higher-level interface to createRevision.
859 * This takes care of computing the links, and storing
860 * a cached version of the transformed wiki-text.
862 * @param string $wikitext The page content.
864 * @param int $version Version number for new revision.
865 * To ensure proper serialization of edits, $version must be
866 * exactly one higher than the current latest version.
867 * (You can defeat this check by setting $version to
868 * {@link WIKIDB_FORCE_CREATE} --- not usually recommended.)
870 * @param hash $meta Meta-data for new revision.
872 function save($wikitext, $version, $meta) {
873 $formatted = new TransformedText($this, $wikitext, $meta);
874 $type = $formatted->getType();
875 $meta['pagetype'] = $type->getName();
876 $links = $formatted->getWikiPageLinks();
878 $backend = &$this->_wikidb->_backend;
879 $newrevision = $this->createRevision($version, $wikitext, $meta, $links);
880 if ($newrevision and !WIKIDB_NOCACHE_MARKUP)
881 $this->set('_cached_html', $formatted->pack());
883 // FIXME: probably should have some global state information
884 // in the backend to control when to optimize.
886 // We're doing this here rather than in createRevision because
887 // postgres can't optimize while locked.
888 if (DEBUG or (time() % 50 == 0)) {
889 if ($backend->optimize())
890 trigger_error(_("Optimizing database"), E_USER_NOTICE);
893 /* Generate notification emails? */
894 if (isa($newrevision, 'WikiDB_PageRevision')) {
895 // Save didn't fail because of concurrent updates.
896 $notify = $this->_wikidb->get('notify');
897 if (!empty($notify) and is_array($notify)) {
898 list($emails, $userids) = $this->getPageChangeEmails($notify);
899 if (!empty($emails)) {
900 $this->sendPageChangeNotification($wikitext, $version, $meta, $emails, $userids);
905 $newrevision->_transformedContent = $formatted;
909 function getPageChangeEmails($notify) {
910 $emails = array(); $userids = array();
911 foreach ($notify as $page => $users) {
912 if (glob_match($page, $this->_pagename)) {
913 foreach ($users as $userid => $user) {
914 if (!$user) { // handle the case for ModeratePage: no prefs, just userid's.
916 $u = $request->getUser();
917 if ($u->UserName() == $userid) {
918 $prefs = $u->getPreferences();
921 if (ENABLE_USER_NEW) {
922 $u = WikiUser($userid);
923 $u->getPreferences();
924 $prefs = &$u->_prefs;
926 $u = new WikiUser($GLOBALS['request'], $userid);
927 $prefs = $u->getPreferences();
930 $emails[] = $prefs->get('email');
931 $userids[] = $userid;
933 if (!empty($user['verified']) and !empty($user['email'])) {
934 $emails[] = $user['email'];
935 $userids[] = $userid;
936 } elseif (!empty($user['email'])) {
938 // do a dynamic emailVerified check update
939 $u = $request->getUser();
940 if ($u->UserName() == $userid) {
941 if ($request->_prefs->get('emailVerified')) {
942 $emails[] = $user['email'];
943 $userids[] = $userid;
944 $notify[$page][$userid]['verified'] = 1;
945 $request->_dbi->set('notify', $notify);
949 if (ENABLE_USER_NEW) {
950 $u = WikiUser($userid);
951 $u->getPreferences();
952 $prefs = &$u->_prefs;
954 $u = new WikiUser($GLOBALS['request'], $userid);
955 $prefs = $u->getPreferences();
957 if ($prefs->get('emailVerified')) {
958 $emails[] = $user['email'];
959 $userids[] = $userid;
960 $notify[$page][$userid]['verified'] = 1;
961 $request->_dbi->set('notify', $notify);
964 // ignore verification
967 if (!in_array($user['email'],$emails))
968 $emails[] = $user['email'];
976 $emails = array_unique($emails);
977 $userids = array_unique($userids);
978 return array($emails, $userids);
982 * Send udiff for a changed page to multiple users.
983 * See rename and remove methods also
985 function sendPageChangeNotification(&$wikitext, $version, $meta, $emails, $userids) {
987 if (@is_array($request->_deferredPageChangeNotification)) {
988 // collapse multiple changes (loaddir) into one email
989 $request->_deferredPageChangeNotification[] = array($this->_pagename, $emails, $userids);
992 $backend = &$this->_wikidb->_backend;
993 //$backend = &$request->_dbi->_backend;
994 $subject = _("Page change").' '.urlencode($this->_pagename);
995 $previous = $backend->get_previous_version($this->_pagename, $version);
996 if (!isset($meta['mtime'])) $meta['mtime'] = time();
998 $difflink = WikiURL($this->_pagename, array('action'=>'diff'), true);
999 $cache = &$this->_wikidb->_cache;
1000 //$cache = &$request->_dbi->_cache;
1001 $this_content = explode("\n", $wikitext);
1002 $prevdata = $cache->get_versiondata($this->_pagename, $previous, true);
1003 if (empty($prevdata['%content']))
1004 $prevdata = $backend->get_versiondata($this->_pagename, $previous, true);
1005 $other_content = explode("\n", $prevdata['%content']);
1007 include_once("lib/difflib.php");
1008 $diff2 = new Diff($other_content, $this_content);
1009 //$context_lines = max(4, count($other_content) + 1,
1010 // count($this_content) + 1);
1011 $fmt = new UnifiedDiffFormatter(/*$context_lines*/);
1012 $content = $this->_pagename . " " . $previous . " " . Iso8601DateTime($prevdata['mtime']) . "\n";
1013 $content .= $this->_pagename . " " . $version . " " . Iso8601DateTime($meta['mtime']) . "\n";
1014 $content .= $fmt->format($diff2);
1017 $difflink = WikiURL($this->_pagename,array(),true);
1018 $content = $this->_pagename . " " . $version . " " . Iso8601DateTime($meta['mtime']) . "\n";
1019 $content .= _("New Page");
1021 $editedby = sprintf(_("Edited by: %s"), $meta['author']);
1022 $emails = join(',',$emails);
1023 if (mail($emails,"[".WIKI_NAME."] ".$subject,
1028 trigger_error(sprintf(_("PageChange Notification of %s sent to %s"),
1029 $this->_pagename, join(',',$userids)), E_USER_NOTICE);
1031 trigger_error(sprintf(_("PageChange Notification Error: Couldn't send %s to %s"),
1032 $this->_pagename, join(',',$userids)), E_USER_WARNING);
1035 /** support mass rename / remove (not yet tested)
1037 function sendPageRenameNotification($to, &$meta, $emails, $userids) {
1039 if (@is_array($request->_deferredPageRenameNotification)) {
1040 $request->_deferredPageRenameNotification[] = array($this->_pagename, $to, $meta, $emails, $userids);
1042 $from = $this->_pagename;
1043 $editedby = sprintf(_("Edited by: %s"), $meta['author']) . ' ' . $meta['author_id'];
1044 $emails = join(',',$emails);
1045 $subject = sprintf(_("Page rename %s to %s"), urlencode($from), urlencode($to));
1046 $link = WikiURL($to, true);
1047 if (mail($emails,"[".WIKI_NAME."] ".$subject,
1051 "Renamed $from to $to"))
1052 trigger_error(sprintf(_("PageChange Notification of %s sent to %s"),
1053 $from, join(',',$userids)), E_USER_NOTICE);
1055 trigger_error(sprintf(_("PageChange Notification Error: Couldn't send %s to %s"),
1056 $from, join(',',$userids)), E_USER_WARNING);
1061 * Get the most recent revision of a page.
1065 * @return WikiDB_PageRevision The current WikiDB_PageRevision object.
1067 function getCurrentRevision($need_content = true) {
1068 $backend = &$this->_wikidb->_backend;
1069 $cache = &$this->_wikidb->_cache;
1070 $pagename = &$this->_pagename;
1072 // Prevent deadlock in case of memory exhausted errors
1073 // Pure selection doesn't really need locking here.
1074 // sf.net bug#927395
1075 // I know it would be better to lock, but with lots of pages this deadlock is more
1076 // severe than occasionally get not the latest revision.
1077 // In spirit to wikiwiki: read fast, edit slower.
1079 $version = $cache->get_latest_version($pagename);
1080 // getRevision gets the content also!
1081 $revision = $this->getRevision($version, $need_content);
1082 //$backend->unlock();
1088 * Get a specific revision of a WikiDB_Page.
1092 * @param integer $version Which revision to get.
1094 * @return WikiDB_PageRevision The requested WikiDB_PageRevision object, or
1095 * false if the requested revision does not exist in the {@link WikiDB}.
1096 * Note that version zero of any page always exists.
1098 function getRevision($version, $need_content=true) {
1099 $cache = &$this->_wikidb->_cache;
1100 $pagename = &$this->_pagename;
1102 if (! $version ) // 0 or false
1103 return new WikiDB_PageRevision($this->_wikidb, $pagename, 0);
1105 assert($version > 0);
1106 $vdata = $cache->get_versiondata($pagename, $version, $need_content);
1110 return new WikiDB_PageRevision($this->_wikidb, $pagename, $version,
1115 * Get previous page revision.
1117 * This method find the most recent revision before a specified
1122 * @param integer $version Find most recent revision before this version.
1123 * You can also use a WikiDB_PageRevision object to specify the $version.
1125 * @return WikiDB_PageRevision The requested WikiDB_PageRevision object, or false if the
1126 * requested revision does not exist in the {@link WikiDB}. Note that
1127 * unless $version is greater than zero, a revision (perhaps version zero,
1128 * the default revision) will always be found.
1130 function getRevisionBefore($version, $need_content=true) {
1131 $backend = &$this->_wikidb->_backend;
1132 $pagename = &$this->_pagename;
1134 $version = $this->_coerce_to_version($version);
1139 $previous = $backend->get_previous_version($pagename, $version);
1140 $revision = $this->getRevision($previous, $need_content);
1141 //$backend->unlock();
1147 * Get all revisions of the WikiDB_Page.
1149 * This does not include the version zero (default) revision in the
1150 * returned revision set.
1152 * @return WikiDB_PageRevisionIterator A
1153 * WikiDB_PageRevisionIterator containing all revisions of this
1154 * WikiDB_Page in reverse order by version number.
1156 function getAllRevisions() {
1157 $backend = &$this->_wikidb->_backend;
1158 $revs = $backend->get_all_revisions($this->_pagename);
1159 return new WikiDB_PageRevisionIterator($this->_wikidb, $revs);
1163 * Find pages which link to or are linked from a page.
1167 * @param boolean $reversed Which links to find: true for backlinks (default).
1169 * @return WikiDB_PageIterator A WikiDB_PageIterator containing
1170 * all matching pages.
1172 function getLinks($reversed = true, $include_empty=false) {
1173 $backend = &$this->_wikidb->_backend;
1174 $result = $backend->get_links($this->_pagename, $reversed, $include_empty);
1175 return new WikiDB_PageIterator($this->_wikidb, $result, array('include_empty' => $include_empty));
1179 * All Links from other pages to this page.
1181 function getBackLinks($include_empty=false) {
1182 return $this->getLinks(true, $include_empty);
1185 * Forward Links: All Links from this page to other pages.
1187 function getPageLinks($include_empty=false) {
1188 return $this->getLinks(false, $include_empty);
1192 * possibly faster link existance check. not yet accelerated.
1194 function existLink($link, $reversed = false) {
1195 $cache = &$this->_wikidb->_cache;
1196 // TODO: check cache if it is possible
1197 $iter = $this->getLinks($reversed, false);
1198 while ($page = $iter->next()) {
1199 if ($page->getName() == $link)
1207 * Access WikiDB_Page meta-data.
1211 * @param string $key Which meta data to get.
1212 * Some reserved meta-data keys are:
1214 * <dt>'locked'<dd> Is page locked?
1215 * <dt>'hits' <dd> Page hit counter.
1216 * <dt>'pref' <dd> Users preferences, stored in homepages.
1217 * <dt>'owner' <dd> Default: first author_id. We might add a group with a dot here:
1218 * E.g. "owner.users"
1219 * <dt>'perm' <dd> Permission flag to authorize read/write/execution of
1220 * page-headers and content.
1221 * <dt>'score' <dd> Page score (not yet implement, do we need?)
1224 * @return scalar The requested value, or false if the requested data
1227 function get($key) {
1228 $cache = &$this->_wikidb->_cache;
1229 if (!$key || $key[0] == '%')
1231 $data = $cache->get_pagedata($this->_pagename);
1232 return isset($data[$key]) ? $data[$key] : false;
1236 * Get all the page meta-data as a hash.
1238 * @return hash The page meta-data.
1240 function getMetaData() {
1241 $cache = &$this->_wikidb->_cache;
1242 $data = $cache->get_pagedata($this->_pagename);
1244 foreach ($data as $key => $val) {
1245 if (/*!empty($val) &&*/ $key[0] != '%')
1252 * Set page meta-data.
1257 * @param string $key Meta-data key to set.
1258 * @param string $newval New value.
1260 function set($key, $newval) {
1261 $cache = &$this->_wikidb->_cache;
1262 $pagename = &$this->_pagename;
1264 assert($key && $key[0] != '%');
1266 $data = $cache->get_pagedata($pagename);
1268 if (!empty($newval)) {
1269 if (!empty($data[$key]) && $data[$key] == $newval)
1270 return; // values identical, skip update.
1273 if (empty($data[$key]))
1274 return; // values identical, skip update.
1277 $cache->update_pagedata($pagename, array($key => $newval));
1281 * Increase page hit count.
1283 * FIXME: IS this needed? Probably not.
1285 * This is a convenience function.
1286 * <pre> $page->increaseHitCount(); </pre>
1287 * is functionally identical to
1288 * <pre> $page->set('hits',$page->get('hits')+1); </pre>
1289 * but less expensive (ignores the pagadata string)
1291 * Note that this method may be implemented in more efficient ways
1292 * in certain backends.
1296 function increaseHitCount() {
1297 if (method_exists($this->_wikidb->_backend, 'increaseHitCount'))
1298 $this->_wikidb->_backend->increaseHitCount($this->_pagename);
1300 @$newhits = $this->get('hits') + 1;
1301 $this->set('hits', $newhits);
1306 * Return a string representation of the WikiDB_Page
1308 * This is really only for debugging.
1312 * @return string Printable representation of the WikiDB_Page.
1314 function asString () {
1316 printf("[%s:%s\n", get_class($this), $this->getName());
1317 print_r($this->getMetaData());
1319 $strval = ob_get_contents();
1327 * @param integer_or_object $version_or_pagerevision
1328 * Takes either the version number (and int) or a WikiDB_PageRevision
1330 * @return integer The version number.
1332 function _coerce_to_version($version_or_pagerevision) {
1333 if (method_exists($version_or_pagerevision, "getContent"))
1334 $version = $version_or_pagerevision->getVersion();
1336 $version = (int) $version_or_pagerevision;
1338 assert($version >= 0);
1342 function isUserPage ($include_empty = true) {
1343 if (!$include_empty and !$this->exists()) return false;
1344 return $this->get('pref') ? true : false;
1347 // May be empty. Either the stored owner (/Chown), or the first authorized author
1348 function getOwner() {
1349 if ($owner = $this->get('owner'))
1350 return ($owner == "The PhpWiki programming team") ? ADMIN_USER : $owner;
1351 // check all revisions forwards for the first author_id
1352 $backend = &$this->_wikidb->_backend;
1353 $pagename = &$this->_pagename;
1354 $latestversion = $backend->get_latest_version($pagename);
1355 for ($v=1; $v <= $latestversion; $v++) {
1356 $rev = $this->getRevision($v,false);
1357 if ($rev and $owner = $rev->get('author_id')) {
1358 return ($owner == "The PhpWiki programming team") ? ADMIN_USER : $owner;
1364 // The authenticated author of the first revision or empty if not authenticated then.
1365 function getCreator() {
1366 if ($current = $this->getRevision(1,false)) return $current->get('author_id');
1370 // The authenticated author of the current revision.
1371 function getAuthor() {
1372 if ($current = $this->getCurrentRevision(false)) return $current->get('author_id');
1379 * This class represents a specific revision of a WikiDB_Page within
1382 * A WikiDB_PageRevision has read-only semantics. You may only create
1383 * new revisions (and delete old ones) --- you cannot modify existing
1386 class WikiDB_PageRevision
1388 //var $_transformedContent = false; // set by WikiDB_Page::save()
1390 function WikiDB_PageRevision(&$wikidb, $pagename, $version, $versiondata = false) {
1391 $this->_wikidb = &$wikidb;
1392 $this->_pagename = $pagename;
1393 $this->_version = $version;
1394 $this->_data = $versiondata ? $versiondata : array();
1395 $this->_transformedContent = false; // set by WikiDB_Page::save()
1399 * Get the WikiDB_Page which this revision belongs to.
1403 * @return WikiDB_Page The WikiDB_Page which this revision belongs to.
1405 function getPage() {
1406 return new WikiDB_Page($this->_wikidb, $this->_pagename);
1410 * Get the version number of this revision.
1414 * @return integer The version number of this revision.
1416 function getVersion() {
1417 return $this->_version;
1421 * Determine whether this revision has defaulted content.
1423 * The default revision (version 0) of each page, as well as any
1424 * pages which are created with empty content have their content
1425 * defaulted to something like:
1427 * Describe [ThisPage] here.
1432 * @return boolean Returns true if the page has default content.
1434 function hasDefaultContents() {
1435 $data = &$this->_data;
1436 return empty($data['%content']); // FIXME: what if it's the number 0? <>'' or === false
1440 * Get the content as an array of lines.
1444 * @return array An array of lines.
1445 * The lines should contain no trailing white space.
1447 function getContent() {
1448 return explode("\n", $this->getPackedContent());
1452 * Get the pagename of the revision.
1456 * @return string pagename.
1458 function getPageName() {
1459 return $this->_pagename;
1463 * Determine whether revision is the latest.
1467 * @return boolean True iff the revision is the latest (most recent) one.
1469 function isCurrent() {
1470 if (!isset($this->_iscurrent)) {
1471 $page = $this->getPage();
1472 $current = $page->getCurrentRevision(false);
1473 $this->_iscurrent = $this->getVersion() == $current->getVersion();
1475 return $this->_iscurrent;
1479 * Get the transformed content of a page.
1481 * @param string $pagetype Override the page-type of the revision.
1483 * @return object An XmlContent-like object containing the page transformed
1486 function getTransformedContent($pagetype_override=false) {
1487 $backend = &$this->_wikidb->_backend;
1489 if ($pagetype_override) {
1490 // Figure out the normal page-type for this page.
1491 $type = PageType::GetPageType($this->get('pagetype'));
1492 if ($type->getName() == $pagetype_override)
1493 $pagetype_override = false; // Not really an override...
1496 if ($pagetype_override) {
1497 // Overriden page type, don't cache (or check cache).
1498 return new TransformedText($this->getPage(),
1499 $this->getPackedContent(),
1500 $this->getMetaData(),
1501 $pagetype_override);
1504 $possibly_cache_results = true;
1506 if (!USECACHE or WIKIDB_NOCACHE_MARKUP) {
1507 if (WIKIDB_NOCACHE_MARKUP == 'purge') {
1508 // flush cache for this page.
1509 $page = $this->getPage();
1510 $page->set('_cached_html', false);
1512 $possibly_cache_results = false;
1514 elseif (!$this->_transformedContent) {
1516 if ($this->isCurrent()) {
1517 $page = $this->getPage();
1518 $this->_transformedContent = TransformedText::unpack($page->get('_cached_html'));
1521 $possibly_cache_results = false;
1523 //$backend->unlock();
1526 if (!$this->_transformedContent) {
1527 $this->_transformedContent
1528 = new TransformedText($this->getPage(),
1529 $this->getPackedContent(),
1530 $this->getMetaData());
1532 if ($possibly_cache_results) {
1533 // If we're still the current version, cache the transfomed page.
1535 if ($this->isCurrent()) {
1536 $page->set('_cached_html', $this->_transformedContent->pack());
1538 //$backend->unlock();
1542 return $this->_transformedContent;
1546 * Get the content as a string.
1550 * @return string The page content.
1551 * Lines are separated by new-lines.
1553 function getPackedContent() {
1554 $data = &$this->_data;
1557 if (empty($data['%content'])) {
1558 include_once('lib/InlineParser.php');
1560 // A feature similar to taglines at http://www.wlug.org.nz/
1561 // Lib from http://www.aasted.org/quote/
1562 if (defined('FORTUNE_DIR')
1563 and is_dir(FORTUNE_DIR)
1564 and in_array($GLOBALS['request']->getArg('action'),
1565 array('create','edit')))
1567 include_once("lib/fortune.php");
1568 $fortune = new Fortune();
1569 $quote = str_replace("\n<br>","\n", $fortune->quoteFromDir(FORTUNE_DIR));
1570 return sprintf("<verbatim>\n%s</verbatim>\n\n"._("Describe %s here."),
1571 $quote, "[" . WikiEscape($this->_pagename) . "]");
1573 // Replace empty content with default value.
1574 return sprintf(_("Describe %s here."),
1575 "[" . WikiEscape($this->_pagename) . "]");
1578 // There is (non-default) content.
1579 assert($this->_version > 0);
1581 if (!is_string($data['%content'])) {
1582 // Content was not provided to us at init time.
1583 // (This is allowed because for some backends, fetching
1584 // the content may be expensive, and often is not wanted
1587 // In any case, now we need to get it.
1588 $data['%content'] = $this->_get_content();
1589 assert(is_string($data['%content']));
1592 return $data['%content'];
1595 function _get_content() {
1596 $cache = &$this->_wikidb->_cache;
1597 $pagename = $this->_pagename;
1598 $version = $this->_version;
1600 assert($version > 0);
1602 $newdata = $cache->get_versiondata($pagename, $version, true);
1604 assert(is_string($newdata['%content']));
1605 return $newdata['%content'];
1608 // else revision has been deleted... What to do?
1609 return __sprintf("Oops! Revision %s of %s seems to have been deleted!",
1610 $version, $pagename);
1615 * Get meta-data for this revision.
1620 * @param string $key Which meta-data to access.
1622 * Some reserved revision meta-data keys are:
1624 * <dt> 'mtime' <dd> Time this revision was created (seconds since midnight Jan 1, 1970.)
1625 * The 'mtime' meta-value is normally set automatically by the database
1626 * backend, but it may be specified explicitly when creating a new revision.
1628 * <dd> To ensure consistency of RecentChanges, the mtimes of the versions
1629 * of a page must be monotonically increasing. If an attempt is
1630 * made to create a new revision with an mtime less than that of
1631 * the preceeding revision, the new revisions timestamp is force
1632 * to be equal to that of the preceeding revision. In that case,
1633 * the originally requested mtime is preserved in 'orig_mtime'.
1634 * <dt> '_supplanted' <dd> Time this revision ceased to be the most recent.
1635 * This meta-value is <em>always</em> automatically maintained by the database
1636 * backend. (It is set from the 'mtime' meta-value of the superceding
1637 * revision.) '_supplanted' has a value of 'false' for the current revision.
1639 * FIXME: this could be refactored:
1641 * <dd> Author of the page (as he should be reported in, e.g. RecentChanges.)
1643 * <dd> Authenticated author of a page. This is used to identify
1644 * the distinctness of authors when cleaning old revisions from
1646 * <dt> 'is_minor_edit' <dd> Set if change was marked as a minor revision by the author.
1647 * <dt> 'summary' <dd> Short change summary entered by page author.
1650 * Meta-data keys must be valid C identifers (they have to start with a letter
1651 * or underscore, and can contain only alphanumerics and underscores.)
1653 * @return string The requested value, or false if the requested value
1656 function get($key) {
1657 if (!$key || $key[0] == '%')
1659 $data = &$this->_data;
1660 return isset($data[$key]) ? $data[$key] : false;
1664 * Get all the revision page meta-data as a hash.
1666 * @return hash The revision meta-data.
1668 function getMetaData() {
1670 foreach ($this->_data as $key => $val) {
1671 if (!empty($val) && $key[0] != '%')
1679 * Return a string representation of the revision.
1681 * This is really only for debugging.
1685 * @return string Printable representation of the WikiDB_Page.
1687 function asString () {
1689 printf("[%s:%d\n", get_class($this), $this->get('version'));
1690 print_r($this->_data);
1691 echo $this->getPackedContent() . "\n]\n";
1692 $strval = ob_get_contents();
1700 * Class representing a sequence of WikiDB_Pages.
1701 * TODO: Enhance to php5 iterators
1703 class WikiDB_PageIterator
1705 function WikiDB_PageIterator(&$wikidb, &$iter, $options=false) {
1706 $this->_iter = $iter; // a WikiDB_backend_iterator
1707 $this->_wikidb = &$wikidb;
1708 $this->_options = $options;
1712 return $this->_iter->count();
1716 * Get next WikiDB_Page in sequence.
1720 * @return WikiDB_Page The next WikiDB_Page in the sequence.
1723 if ( ! ($next = $this->_iter->next()) )
1726 $pagename = &$next['pagename'];
1728 trigger_error('empty pagename in WikiDB_PageIterator::next()', E_USER_WARNING);
1732 // there's always hits, but we cache only if more
1733 // (well not with file, cvs and dba)
1734 if (isset($next['pagedata']) and count($next['pagedata']) > 1) {
1735 $this->_wikidb->_cache->cache_data($next);
1736 // cache existing page id's since we iterate over all links in GleanDescription
1737 // and need them later for LinkExistingWord
1738 } elseif ($this->_options and array_key_exists('include_empty', $this->_options)
1739 and !$this->_options['include_empty'] and isset($next['id'])) {
1740 $this->_wikidb->_cache->_id_cache[$next['pagename']] = $next['id'];
1742 return new WikiDB_Page($this->_wikidb, $pagename);
1746 * Release resources held by this iterator.
1748 * The iterator may not be used after free() is called.
1750 * There is no need to call free(), if next() has returned false.
1751 * (I.e. if you iterate through all the pages in the sequence,
1752 * you do not need to call free() --- you only need to call it
1753 * if you stop before the end of the iterator is reached.)
1758 $this->_iter->free();
1761 function asArray() {
1763 while ($page = $this->next())
1773 * A class which represents a sequence of WikiDB_PageRevisions.
1774 * TODO: Enhance to php5 iterators
1776 class WikiDB_PageRevisionIterator
1778 function WikiDB_PageRevisionIterator(&$wikidb, &$revisions, $options=false) {
1779 $this->_revisions = $revisions;
1780 $this->_wikidb = &$wikidb;
1781 $this->_options = $options;
1785 return $this->_revisions->count();
1789 * Get next WikiDB_PageRevision in sequence.
1793 * @return WikiDB_PageRevision
1794 * The next WikiDB_PageRevision in the sequence.
1797 if ( ! ($next = $this->_revisions->next()) )
1800 $this->_wikidb->_cache->cache_data($next);
1802 $pagename = $next['pagename'];
1803 $version = $next['version'];
1804 $versiondata = $next['versiondata'];
1806 if (!(is_string($pagename) and $pagename != '')) {
1807 trigger_error("empty pagename",E_USER_WARNING);
1810 } else assert(is_string($pagename) and $pagename != '');
1812 if (!is_array($versiondata)) {
1813 trigger_error("empty versiondata",E_USER_WARNING);
1816 } else assert(is_array($versiondata));
1818 if (!($version > 0)) {
1819 trigger_error("invalid version",E_USER_WARNING);
1822 } else assert($version > 0);
1824 return new WikiDB_PageRevision($this->_wikidb, $pagename, $version,
1829 * Release resources held by this iterator.
1831 * The iterator may not be used after free() is called.
1833 * There is no need to call free(), if next() has returned false.
1834 * (I.e. if you iterate through all the revisions in the sequence,
1835 * you do not need to call free() --- you only need to call it
1836 * if you stop before the end of the iterator is reached.)
1841 $this->_revisions->free();
1844 function asArray() {
1846 while ($rev = $this->next())
1855 class WikiDB_Array_PageIterator
1857 function WikiDB_Array_PageIterator(&$pagenames) {
1859 $this->_dbi = $request->getDbh();
1860 $this->_pages = $pagenames;
1861 reset($this->_pages);
1864 $c =& current($this->_pages);
1865 next($this->_pages);
1866 return $c !== false ? $this->_dbi->getPage($c) : false;
1869 return count($this->_pages);
1872 function asArray() {
1873 reset($this->_pages);
1874 return $this->_pages;
1878 class WikiDB_Array_generic_iter
1880 function WikiDB_Array_generic_iter($result) {
1881 // $result may be either an array or a query result
1882 if (is_array($result)) {
1883 $this->_array = $result;
1884 } elseif (is_object($result)) {
1885 $this->_array = $result->asArray();
1887 $this->_array = array();
1889 if (!empty($this->_array))
1890 reset($this->_array);
1893 $c =& current($this->_array);
1894 next($this->_array);
1895 return $c !== false ? $c : false;
1898 return count($this->_array);
1901 function asArray() {
1902 if (!empty($this->_array))
1903 reset($this->_array);
1904 return $this->_array;
1909 * Data cache used by WikiDB.
1911 * FIXME: Maybe rename this to caching_backend (or some such).
1917 // FIXME: beautify versiondata cache. Cache only limited data?
1919 function WikiDB_cache (&$backend) {
1920 $this->_backend = &$backend;
1922 $this->_pagedata_cache = array();
1923 $this->_versiondata_cache = array();
1924 array_push ($this->_versiondata_cache, array());
1925 $this->_glv_cache = array();
1926 $this->_id_cache = array(); // formerly ->_dbi->_iwpcache (nonempty pages => id)
1930 $this->_pagedata_cache = array();
1931 $this->_versiondata_cache = array();
1932 $this->_glv_cache = array();
1933 $this->_id_cache = array();
1936 function get_pagedata($pagename) {
1937 assert(is_string($pagename) && $pagename != '');
1939 $cache = &$this->_pagedata_cache;
1940 if (!isset($cache[$pagename]) || !is_array($cache[$pagename])) {
1941 $cache[$pagename] = $this->_backend->get_pagedata($pagename);
1942 // Never keep a ['%pagedata']['_cached_html'] in cache, other than the current page.
1943 if (isset($cache[$pagename]['_cached_html'])
1944 and $pagename != $GLOBALS['request']->getArg('pagename')) {
1945 unset($cache[$pagename]['_cached_html']);
1947 if (empty($cache[$pagename]))
1948 $cache[$pagename] = array();
1950 return $cache[$pagename];
1952 return $this->_backend->get_pagedata($pagename);
1956 function update_pagedata($pagename, $newdata) {
1957 assert(is_string($pagename) && $pagename != '');
1958 unset ($this->_pagedata_cache[$pagename]);
1960 $this->_backend->update_pagedata($pagename, $newdata);
1962 if (USECACHE and !empty($this->_pagedata_cache[$pagename]) and is_array($this->_pagedata_cache[$pagename])) {
1963 $cachedata = &$this->_pagedata_cache[$pagename];
1964 foreach($newdata as $key => $val)
1965 $cachedata[$key] = $val;
1969 function invalidate_cache($pagename) {
1970 unset ($this->_pagedata_cache[$pagename]);
1971 unset ($this->_versiondata_cache[$pagename]);
1972 unset ($this->_glv_cache[$pagename]);
1973 unset ($this->_id_cache[$pagename]);
1974 //unset ($this->_backend->_page_data);
1977 function delete_page($pagename) {
1978 $this->_backend->delete_page($pagename);
1979 $this->invalidate_cache($pagename);
1983 function cache_data($data) {
1984 if (isset($data['pagedata']))
1985 $this->_pagedata_cache[$data['pagename']] = $data['pagedata'];
1988 function get_versiondata($pagename, $version, $need_content = false) {
1989 // FIXME: Seriously ugly hackage
1990 if (USECACHE) { //temporary - for debugging
1991 assert(is_string($pagename) && $pagename != '');
1992 // there is a bug here somewhere which results in an assertion failure at line 105
1993 // of ArchiveCleaner.php It goes away if we use the next line.
1994 //$need_content = true;
1995 $nc = $need_content ? '1':'0';
1996 $cache = &$this->_versiondata_cache;
1997 if (!isset($cache[$pagename][$version][$nc])||
1998 !(is_array ($cache[$pagename])) || !(is_array ($cache[$pagename][$version]))) {
1999 $cache[$pagename][$version][$nc] =
2000 $this->_backend->get_versiondata($pagename, $version, $need_content);
2001 // If we have retrieved all data, we may as well set the cache for $need_content = false
2003 $cache[$pagename][$version]['0'] =& $cache[$pagename][$version]['1'];
2006 $vdata = $cache[$pagename][$version][$nc];
2008 $vdata = $this->_backend->get_versiondata($pagename, $version, $need_content);
2011 // Rationale: never keep ['%pagedata']['_cached_html'] in cache.
2012 if ($vdata && !empty($vdata['%pagedata'])) {
2013 $this->_pagedata_cache[$pagename] =& $vdata['%pagedata'];
2014 // only store _cached_html for the requested page
2016 and isset($vdata['%pagedata']['_cached_html'])
2017 and $pagename != $GLOBALS['request']->getArg('pagename'))
2019 unset($this->_pagedata_cache[$pagename]['_cached_html']);
2020 unset($cache[$pagename][$version][$nc]['%pagedata']['_cached_html']);
2022 unset($cache[$pagename][$version][0]['%pagedata']['_cached_html']);
2028 function set_versiondata($pagename, $version, $data) {
2029 //unset($this->_versiondata_cache[$pagename][$version]);
2031 $new = $this->_backend->set_versiondata($pagename, $version, $data);
2033 $this->_versiondata_cache[$pagename][$version]['1'] = $data;
2034 $this->_versiondata_cache[$pagename][$version]['0'] = $data;
2035 // Is this necessary?
2036 unset($this->_glv_cache[$pagename]);
2039 function update_versiondata($pagename, $version, $data) {
2040 $new = $this->_backend->update_versiondata($pagename, $version, $data);
2042 // FIXME: never keep ['%pagedata']['_cached_html'] in cache.
2043 $this->_versiondata_cache[$pagename][$version]['1'] = $data;
2045 $this->_versiondata_cache[$pagename][$version]['0'] = $data;
2046 // Is this necessary?
2047 unset($this->_glv_cache[$pagename]);
2050 function delete_versiondata($pagename, $version) {
2051 $new = $this->_backend->delete_versiondata($pagename, $version);
2052 if (isset($this->_versiondata_cache[$pagename][$version]['1']))
2053 unset ($this->_versiondata_cache[$pagename][$version]['1']);
2054 if (isset($this->_versiondata_cache[$pagename][$version]['0']))
2055 unset ($this->_versiondata_cache[$pagename][$version]['0']);
2056 if (isset($this->_glv_cache[$pagename]))
2057 unset ($this->_glv_cache[$pagename]);
2060 function get_latest_version($pagename) {
2062 assert (is_string($pagename) && $pagename != '');
2063 $cache = &$this->_glv_cache;
2064 if (!isset($cache[$pagename])) {
2065 $cache[$pagename] = $this->_backend->get_latest_version($pagename);
2066 if (empty($cache[$pagename]))
2067 $cache[$pagename] = 0;
2069 return $cache[$pagename];
2071 return $this->_backend->get_latest_version($pagename);
2076 function _sql_debuglog($msg, $newline=true, $shutdown=false) {
2080 $stamp = strftime("%y%m%d-%H%M%S");
2081 $fp = fopen("/tmp/sql-$stamp.log", "a");
2082 register_shutdown_function("_sql_debuglog_shutdown_function");
2083 } elseif ($shutdown) {
2087 if ($newline) fputs($fp, "[$i++] $msg");
2088 else fwrite($fp, $msg);
2090 function _sql_debuglog_shutdown_function() {
2091 _sql_debuglog('',false,true);
2094 // $Log: not supported by cvs2svn $
2095 // Revision 1.107 2004/11/21 11:59:16 rurban
2096 // remove final \n to be ob_cache independent
2098 // Revision 1.106 2004/11/20 17:35:56 rurban
2099 // improved WantedPages SQL backends
2100 // PageList::sortby new 3rd arg valid_fields (override db fields)
2101 // WantedPages sql pager inexact for performance reasons:
2102 // assume 3 wantedfrom per page, to be correct, no getTotal()
2103 // support exclude argument for get_all_pages, new _sql_set()
2105 // Revision 1.105 2004/11/20 09:16:27 rurban
2106 // Fix bad-style Cut&Paste programming errors, detected by Charles Corrigan.
2108 // Revision 1.104 2004/11/19 19:22:03 rurban
2109 // ModeratePage part1: change status
2111 // Revision 1.103 2004/11/16 17:29:04 rurban
2112 // fix remove notification error
2113 // fix creation + update id_cache update
2115 // Revision 1.102 2004/11/11 18:31:26 rurban
2116 // add simple backtrace on such general failures to get at least an idea where
2118 // Revision 1.101 2004/11/10 19:32:22 rurban
2119 // * optimize increaseHitCount, esp. for mysql.
2120 // * prepend dirs to the include_path (phpwiki_dir for faster searches)
2121 // * Pear_DB version logic (awful but needed)
2122 // * fix broken ADODB quote
2123 // * _extract_page_data simplification
2125 // Revision 1.100 2004/11/10 15:29:20 rurban
2126 // * requires newer Pear_DB (as the internal one): quote() uses now escapeSimple for strings
2127 // * ACCESS_LOG_SQL: fix cause request not yet initialized
2128 // * WikiDB: moved SQL specific methods upwards
2129 // * new Pear_DB quoting: same as ADODB and as newer Pear_DB.
2130 // fixes all around: WikiGroup, WikiUserNew SQL methods, SQL logging
2132 // Revision 1.99 2004/11/09 17:11:05 rurban
2133 // * revert to the wikidb ref passing. there's no memory abuse there.
2134 // * use new wikidb->_cache->_id_cache[] instead of wikidb->_iwpcache, to effectively
2135 // store page ids with getPageLinks (GleanDescription) of all existing pages, which
2136 // are also needed at the rendering for linkExistingWikiWord().
2137 // pass options to pageiterator.
2138 // use this cache also for _get_pageid()
2139 // This saves about 8 SELECT count per page (num all pagelinks).
2140 // * fix passing of all page fields to the pageiterator.
2141 // * fix overlarge session data which got broken with the latest ACCESS_LOG_SQL changes
2143 // Revision 1.98 2004/11/07 18:34:29 rurban
2144 // more logging fixes
2146 // Revision 1.97 2004/11/07 16:02:51 rurban
2147 // new sql access log (for spam prevention), and restructured access log class
2148 // dbh->quote (generic)
2149 // pear_db: mysql specific parts seperated (using replace)
2151 // Revision 1.96 2004/11/05 22:32:15 rurban
2152 // encode the subject to be 7-bit safe
2154 // Revision 1.95 2004/11/05 20:53:35 rurban
2155 // login cleanup: better debug msg on failing login,
2156 // checked password less immediate login (bogo or anon),
2157 // checked olduser pref session error,
2158 // better PersonalPage without password warning on minimal password length=0
2159 // (which is default now)
2161 // Revision 1.94 2004/11/01 10:43:56 rurban
2162 // seperate PassUser methods into seperate dir (memory usage)
2163 // fix WikiUser (old) overlarge data session
2164 // remove wikidb arg from various page class methods, use global ->_dbi instead
2167 // Revision 1.93 2004/10/14 17:17:57 rurban
2168 // remove dbi WikiDB_Page param: use global request object instead. (memory)
2169 // allow most_popular sortby arguments
2171 // Revision 1.92 2004/10/05 17:00:04 rurban
2172 // support paging for simple lists
2173 // fix RatingDb sql backend.
2174 // remove pages from AllPages (this is ListPages then)
2176 // Revision 1.91 2004/10/04 23:41:19 rurban
2177 // delete notify: fix, @unset syntax error
2179 // Revision 1.90 2004/09/28 12:50:22 rurban
2180 // https://sourceforge.net/forum/forum.php?thread_id=1150924&forum_id=18929
2182 // Revision 1.89 2004/09/26 10:54:42 rurban
2183 // silence deferred check
2185 // Revision 1.88 2004/09/25 18:16:40 rurban
2186 // unset more unneeded _cached_html. (Guess this should fix sf.net now)
2188 // Revision 1.87 2004/09/25 16:25:40 rurban
2189 // notify on rename and remove (to be improved)
2191 // Revision 1.86 2004/09/23 18:52:06 rurban
2192 // only fortune at create
2194 // Revision 1.85 2004/09/16 08:00:51 rurban
2195 // just some comments
2197 // Revision 1.84 2004/09/14 10:34:30 rurban
2198 // fix TransformedText call to use refs
2200 // Revision 1.83 2004/09/08 13:38:00 rurban
2201 // improve loadfile stability by using markup=2 as default for undefined markup-style.
2202 // use more refs for huge objects.
2203 // fix debug=static issue in WikiPluginCached
2205 // Revision 1.82 2004/09/06 12:08:49 rurban
2206 // memory_limit on unix workaround
2207 // VisualWiki: default autosize image
2209 // Revision 1.81 2004/09/06 08:28:00 rurban
2210 // rename genericQuery to genericSqlQuery
2212 // Revision 1.80 2004/07/09 13:05:34 rurban
2215 // Revision 1.79 2004/07/09 10:06:49 rurban
2216 // Use backend specific sortby and sortable_columns method, to be able to
2217 // select between native (Db backend) and custom (PageList) sorting.
2218 // Fixed PageList::AddPageList (missed the first)
2219 // Added the author/creator.. name to AllPagesBy...
2220 // display no pages if none matched.
2221 // Improved dba and file sortby().
2222 // Use &$request reference
2224 // Revision 1.78 2004/07/08 21:32:35 rurban
2225 // Prevent from more warnings, minor db and sort optimizations
2227 // Revision 1.77 2004/07/08 19:04:42 rurban
2228 // more unittest fixes (file backend, metadata RatingsDb)
2230 // Revision 1.76 2004/07/08 17:31:43 rurban
2231 // improve numPages for file (fixing AllPagesTest)
2233 // Revision 1.75 2004/07/05 13:56:22 rurban
2234 // sqlite autoincrement fix
2236 // Revision 1.74 2004/07/03 16:51:05 rurban
2237 // optional DBADMIN_USER:DBADMIN_PASSWD for action=upgrade (if no ALTER permission)
2238 // added atomic mysql REPLACE for PearDB as in ADODB
2239 // fixed _lock_tables typo links => link
2240 // fixes unserialize ADODB bug in line 180
2242 // Revision 1.73 2004/06/29 08:52:22 rurban
2243 // Use ...version() $need_content argument in WikiDB also:
2244 // To reduce the memory footprint for larger sets of pagelists,
2245 // we don't cache the content (only true or false) and
2246 // we purge the pagedata (_cached_html) also.
2247 // _cached_html is only cached for the current pagename.
2248 // => Vastly improved page existance check, ACL check, ...
2250 // Now only PagedList info=content or size needs the whole content, esp. if sortable.
2252 // Revision 1.72 2004/06/25 14:15:08 rurban
2253 // reduce memory footprint by caching only requested pagedate content (improving most page iterators)
2255 // Revision 1.71 2004/06/21 16:22:30 rurban
2256 // add DEFAULT_DUMP_DIR and HTML_DUMP_DIR constants, for easier cmdline dumps,
2257 // fixed dumping buttons locally (images/buttons/),
2258 // support pages arg for dumphtml,
2259 // optional directory arg for dumpserial + dumphtml,
2260 // fix a AllPages warning,
2261 // show dump warnings/errors on DEBUG,
2262 // don't warn just ignore on wikilens pagelist columns, if not loaded.
2263 // RateIt pagelist column is called "rating", not "ratingwidget" (Dan?)
2265 // Revision 1.70 2004/06/18 14:39:31 rurban
2266 // actually check USECACHE
2268 // Revision 1.69 2004/06/13 15:33:20 rurban
2269 // new support for arguments owner, author, creator in most relevant
2270 // PageList plugins. in WikiAdmin* via preSelectS()
2272 // Revision 1.68 2004/06/08 21:03:20 rurban
2273 // updated RssParser for XmlParser quirks (store parser object params in globals)
2275 // Revision 1.67 2004/06/07 19:12:49 rurban
2276 // fixed rename version=0, bug #966284
2278 // Revision 1.66 2004/06/07 18:57:27 rurban
2279 // fix rename: Change pagename in all linked pages
2281 // Revision 1.65 2004/06/04 20:32:53 rurban
2282 // Several locale related improvements suggested by Pierrick Meignen
2283 // LDAP fix by John Cole
2284 // reanable admin check without ENABLE_PAGEPERM in the admin plugins
2286 // Revision 1.64 2004/06/04 16:50:00 rurban
2287 // add random quotes to empty pages
2289 // Revision 1.63 2004/06/04 11:58:38 rurban
2290 // added USE_TAGLINES
2292 // Revision 1.62 2004/06/03 22:24:41 rurban
2293 // reenable admin check on !ENABLE_PAGEPERM, honor s=Wildcard arg, fix warning after Remove
2295 // Revision 1.61 2004/06/02 17:13:48 rurban
2296 // fix getRevisionBefore assertion
2298 // Revision 1.60 2004/05/28 10:09:58 rurban
2299 // fix bug #962117, incorrect init of auth_dsn
2301 // Revision 1.59 2004/05/27 17:49:05 rurban
2302 // renamed DB_Session to DbSession (in CVS also)
2303 // added WikiDB->getParam and WikiDB->getAuthParam method to get rid of globals
2304 // remove leading slash in error message
2305 // added force_unlock parameter to File_Passwd (no return on stale locks)
2306 // fixed adodb session AffectedRows
2307 // added FileFinder helpers to unify local filenames and DATA_PATH names
2308 // editpage.php: new edit toolbar javascript on ENABLE_EDIT_TOOLBAR
2310 // Revision 1.58 2004/05/18 13:59:14 rurban
2311 // rename simpleQuery to genericQuery
2313 // Revision 1.57 2004/05/16 22:07:35 rurban
2314 // check more config-default and predefined constants
2315 // various PagePerm fixes:
2316 // fix default PagePerms, esp. edit and view for Bogo and Password users
2317 // implemented Creator and Owner
2318 // BOGOUSERS renamed to BOGOUSER
2319 // fixed syntax errors in signin.tmpl
2321 // Revision 1.56 2004/05/15 22:54:49 rurban
2322 // fixed important WikiDB bug with DEBUG > 0: wrong assertion
2323 // improved SetAcl (works) and PagePerms, some WikiGroup helpers.
2325 // Revision 1.55 2004/05/12 19:27:47 rurban
2326 // revert wrong inline optimization.
2328 // Revision 1.54 2004/05/12 10:49:55 rurban
2329 // require_once fix for those libs which are loaded before FileFinder and
2330 // its automatic include_path fix, and where require_once doesn't grok
2331 // dirname(__FILE__) != './lib'
2332 // upgrade fix with PearDB
2333 // navbar.tmpl: remove spaces for IE button alignment
2335 // Revision 1.53 2004/05/08 14:06:12 rurban
2336 // new support for inlined image attributes: [image.jpg size=50x30 align=right]
2337 // minor stability and portability fixes
2339 // Revision 1.52 2004/05/06 19:26:16 rurban
2340 // improve stability, trying to find the InlineParser endless loop on sf.net
2342 // remove end-of-zip comments to fix sf.net bug #777278 and probably #859628
2344 // Revision 1.51 2004/05/06 17:30:37 rurban
2345 // CategoryGroup: oops, dos2unix eol
2346 // improved phpwiki_version:
2347 // pre -= .0001 (1.3.10pre: 1030.099)
2348 // -p1 += .001 (1.3.9-p1: 1030.091)
2349 // improved InstallTable for mysql and generic SQL versions and all newer tables so far.
2350 // abstracted more ADODB/PearDB methods for action=upgrade stuff:
2351 // backend->backendType(), backend->database(),
2352 // backend->listOfFields(),
2353 // backend->listOfTables(),
2355 // Revision 1.50 2004/05/04 22:34:25 rurban
2358 // Revision 1.49 2004/05/03 11:16:40 rurban
2359 // fixed sendPageChangeNotification
2360 // subject rewording
2362 // Revision 1.48 2004/04/29 23:03:54 rurban
2363 // fixed sf.net bug #940996
2365 // Revision 1.47 2004/04/29 19:39:44 rurban
2366 // special support for formatted plugins (one-liners)
2367 // like <small><plugin BlaBla ></small>
2368 // iter->asArray() helper for PopularNearby
2369 // db_session for older php's (no &func() allowed)
2371 // Revision 1.46 2004/04/26 20:44:34 rurban
2372 // locking table specific for better databases
2374 // Revision 1.45 2004/04/20 00:06:03 rurban
2375 // themable paging support
2377 // Revision 1.44 2004/04/19 18:27:45 rurban
2378 // Prevent from some PHP5 warnings (ref args, no :: object init)
2379 // php5 runs now through, just one wrong XmlElement object init missing
2380 // Removed unneccesary UpgradeUser lines
2381 // Changed WikiLink to omit version if current (RecentChanges)
2383 // Revision 1.43 2004/04/18 01:34:20 rurban
2384 // protect most_popular from sortby=mtime
2386 // Revision 1.42 2004/04/18 01:11:51 rurban
2387 // more numeric pagename fixes.
2388 // fixed action=upload with merge conflict warnings.
2389 // charset changed from constant to global (dynamic utf-8 switching)
2395 // c-basic-offset: 4
2396 // c-hanging-comment-ender-p: nil
2397 // indent-tabs-mode: nil