2 rcs_id('$Id: WikiDB.php,v 1.16 2002-09-01 16:33:18 rurban Exp $');
4 //FIXME: arg on get*Revision to hint that content is wanted.
6 define('WIKIDB_FORCE_CREATE', -1);
8 // FIXME: used for debugging only. Comment out if cache does not work
12 * Abstract base class for the database used by PhpWiki.
14 * A <tt>WikiDB</tt> is a container for <tt>WikiDB_Page</tt>s which in
15 * turn contain <tt>WikiDB_PageRevision</tt>s.
17 * Conceptually a <tt>WikiDB</tt> contains all possible
18 * <tt>WikiDB_Page</tt>s, whether they have been initialized or not.
19 * Since all possible pages are already contained in a WikiDB, a call
20 * to WikiDB::getPage() will never fail (barring bugs and
21 * e.g. filesystem or SQL database problems.)
23 * Also each <tt>WikiDB_Page</tt> always contains at least one
24 * <tt>WikiDB_PageRevision</tt>: the default content (e.g. "Describe
25 * [PageName] here."). This default content has a version number of
28 * <tt>WikiDB_PageRevision</tt>s have read-only semantics. One can
29 * only create new revisions or delete old ones --- one can not modify
30 * an existing revision.
34 * Open a WikiDB database.
36 * This is a static member function. This function inspects its
37 * arguments to determine the proper subclass of WikiDB to
38 * instantiate, and then it instantiates it.
42 * @param $dbparams hash Database configuration parameters.
43 * Some pertinent paramters are:
46 * <dd> The back-end type. Current supported types are:
49 * <dd> Generic SQL backend based on the PEAR/DB database abstraction
52 * <dd> Dba based backend.
56 * <dd> (Used by the SQL backend.)
57 * The DSN specifying which database to connect to.
60 * <dd> Prefix to be prepended to database table (and file names).
63 * <dd> (Used by the dba backend.)
64 * Which directory db files reside in.
67 * <dd> (Used by the dba backend.)
68 * Timeout in seconds for opening (and obtaining lock) on the
72 * <dd> (Used by the dba backend.)
74 * Which dba handler to use. Good choices are probably either
78 * @return object A WikiDB object.
80 function open ($dbparams) {
81 $dbtype = $dbparams{'dbtype'};
82 include_once("lib/WikiDB/$dbtype.php");
84 $class = 'WikiDB_' . $dbtype;
85 return new $class ($dbparams);
93 function WikiDB ($backend, $dbparams) {
94 $this->_backend = &$backend;
95 $this->_cache = new WikiDB_cache($backend);
97 //FIXME: devel checking.
98 //$this->_backend->check();
102 * Get any user-level warnings about this WikiDB.
104 * Some back-ends, e.g. by default create there data files in the
105 * global /tmp directory. We would like to warn the user when this
106 * happens (since /tmp files tend to get wiped periodically.)
107 * Warnings such as these may be communicated from specific
108 * back-ends through this method.
112 * @return string A warning message (or <tt>false</tt> if there is
115 function genericWarnings() {
120 * Close database connection.
122 * The database may no longer be used after it is closed.
124 * Closing a WikiDB invalidates all <tt>WikiDB_Page</tt>s,
125 * <tt>WikiDB_PageRevision</tt>s and <tt>WikiDB_PageIterator</tt>s
126 * which have been obtained from it.
131 $this->_backend->close();
132 $this->_cache->close();
136 * Get a WikiDB_Page from a WikiDB.
138 * A WikiDB consists of the (infinite) set of all possible pages,
139 * therefore this method never fails.
142 * @param $pagename string Which page to get.
143 * @return object The requested WikiDB_Page.
145 function getPage($pagename) {
146 assert(is_string($pagename) && $pagename);
147 return new WikiDB_Page($this, $pagename);
152 //function nPages() {
157 * Determine whether page exists (in non-default form).
160 * $is_page = $dbi->isWikiPage($pagename);
164 * $page = $dbi->getPage($pagename);
165 * $current = $page->getCurrentRevision();
166 * $is_page = ! $current->hasDefaultContents();
168 * however isWikiPage may be implemented in a more efficient
169 * manner in certain back-ends.
173 * @param $pagename string Which page to check.
175 * @return boolean True if the page actually exists with
176 * non-default contents in the WikiDataBase.
178 function isWikiPage ($pagename) {
179 $page = $this->getPage($pagename);
180 $current = $page->getCurrentRevision();
181 return ! $current->hasDefaultContents();
185 * Delete page from the WikiDB.
187 * Deletes all revisions of the page from the WikiDB. Also resets
188 * all page meta-data to the default values.
192 * @param $pagename string Name of page to delete.
194 function deletePage($pagename) {
195 $this->_cache->delete_page($pagename);
196 $this->_backend->set_links($pagename, false);
200 * Retrieve all pages.
202 * Gets the set of all pages with non-default contents.
204 * FIXME: do we need this? I think so. The simple searches
209 * @param $include_defaulted boolean Normally pages whose most
210 * recent revision has empty content are considered to be
211 * non-existant. Unless $include_defaulted is set to true, those
212 * pages will not be returned.
214 * @return object A WikiDB_PageIterator which contains all pages
215 * in the WikiDB which have non-default contents.
217 function getAllPages($include_defaulted = false) {
218 $result = $this->_backend->get_all_pages($include_defaulted);
219 return new WikiDB_PageIterator($this, $result);
225 * Search for pages containing (or not containing) certain words
228 * Pages are returned in alphabetical order whenever it is
229 * practical to do so.
231 * FIXME: should titleSearch and fullSearch be combined? I think so.
234 * @param $search object A TextSearchQuery
235 * @return object A WikiDB_PageIterator containing the matching pages.
236 * @see TextSearchQuery
238 function titleSearch($search) {
239 $result = $this->_backend->text_search($search);
240 return new WikiDB_PageIterator($this, $result);
246 * Search for pages containing (or not containing) certain words
247 * in their entire text (this includes the page content and the
250 * Pages are returned in alphabetical order whenever it is
251 * practical to do so.
255 * @param $search object A TextSearchQuery object.
256 * @return object A WikiDB_PageIterator containing the matching pages.
257 * @see TextSearchQuery
259 function fullSearch($search) {
260 $result = $this->_backend->text_search($search, 'full_text');
261 return new WikiDB_PageIterator($this, $result);
265 * Find the pages with the greatest hit counts.
267 * Pages are returned in reverse order by hit count.
271 * @param $limit signed integer The maximum number of pages to return.
272 * Set $limit to zero to return all pages. If $limit < 0, pages will
273 * be sorted in decreasing order of popularity.
275 * @return object A WikiDB_PageIterator containing the matching
278 function mostPopular($limit = 20) {
279 $result = $this->_backend->most_popular($limit);
280 return new WikiDB_PageIterator($this, $result);
284 * Find recent page revisions.
286 * Revisions are returned in reverse order by creation time.
290 * @param $params hash This hash is used to specify various optional
294 * <dd> (integer) At most this many revisions will be returned.
296 * <dd> (integer) Only revisions since this time (unix-timestamp) will be returned.
297 * <dt> include_minor_revisions
298 * <dd> (boolean) Also include minor revisions. (Default is not to.)
299 * <dt> exclude_major_revisions
300 * <dd> (boolean) Don't include non-minor revisions.
301 * (Exclude_major_revisions implies include_minor_revisions.)
302 * <dt> include_all_revisions
303 * <dd> (boolean) Return all matching revisions for each page.
304 * Normally only the most recent matching revision is returned
308 * @return object A WikiDB_PageRevisionIterator containing the
309 * matching revisions.
311 function mostRecent($params = false) {
312 $result = $this->_backend->most_recent($params);
313 return new WikiDB_PageRevisionIterator($this, $result);
317 * Blog search. (experimental)
319 * Search for blog entries related to a certain page.
321 * FIXME: with pagetype support and perhaps a RegexpSearchQuery
322 * we can make sure we are returning *ONLY* blog pages to the
323 * main routine. Currently, we just use titleSearch which requires
324 * some furher checking in lib/plugin/WikiBlog.php (BAD).
328 * @param $order string 'normal' (chronological) or 'reverse'
329 * @param $page string Find blog entries related to this page.
330 * @return object A WikiDB_PageIterator containing the relevant pages.
332 function blogSearch($page, $order) {
333 //FIXME: implement ordering
335 require_once('lib/TextSearchQuery.php');
336 $query = new TextSearchQuery ($page . SUBPAGE_SEPARATOR);
338 return $this->titleSearch($query);
345 * An abstract base class which representing a wiki-page within a
348 * A WikiDB_Page contains a number (at least one) of
349 * WikiDB_PageRevisions.
353 function WikiDB_Page(&$wikidb, $pagename) {
354 $this->_wikidb = &$wikidb;
355 $this->_pagename = $pagename;
356 assert(!empty($this->_pagename));
360 * Get the name of the wiki page.
364 * @return string The page name.
367 return $this->_pagename;
372 * Delete an old revision of a WikiDB_Page.
374 * Deletes the specified revision of the page.
375 * It is a fatal error to attempt to delete the current revision.
379 * @param $version integer Which revision to delete. (You can also
380 * use a WikiDB_PageRevision object here.)
382 function deleteRevision($version) {
383 $backend = &$this->_wikidb->_backend;
384 $cache = &$this->_wikidb->_cache;
385 $pagename = &$this->_pagename;
387 $version = $this->_coerce_to_version($version);
392 $latestversion = $cache->get_latest_version($pagename);
393 if ($latestversion && $version == $latestversion) {
395 trigger_error(sprintf("Attempt to delete most recent revision of '%s'",
396 $pagename), E_USER_ERROR);
400 $cache->delete_versiondata($pagename, $version);
406 * Delete a revision, or possibly merge it with a previous
410 * Suppose an author make a (major) edit to a page. Shortly
411 * after that the same author makes a minor edit (e.g. to fix
412 * spelling mistakes he just made.)
414 * Now some time later, where cleaning out old saved revisions,
415 * and would like to delete his minor revision (since there's
416 * really no point in keeping minor revisions around for a long
419 * Note that the text after the minor revision probably represents
420 * what the author intended to write better than the text after
421 * the preceding major edit.
423 * So what we really want to do is merge the minor edit with the
426 * We will only do this when:
428 * <li>The revision being deleted is a minor one, and
429 * <li>It has the same author as the immediately preceding revision.
432 function mergeRevision($version) {
433 $backend = &$this->_wikidb->_backend;
434 $cache = &$this->_wikidb->_cache;
435 $pagename = &$this->_pagename;
437 $version = $this->_coerce_to_version($version);
442 $latestversion = $backend->get_latest_version($pagename);
443 if ($latestversion && $version == $latestversion) {
445 trigger_error(sprintf("Attempt to merge most recent revision of '%s'",
446 $pagename), E_USER_ERROR);
450 $versiondata = $cache->get_versiondata($pagename, $version, true);
452 // Not there? ... we're done!
457 if ($versiondata['is_minor_edit']) {
458 $previous = $backend->get_previous_version($pagename, $version);
460 $prevdata = $cache->get_versiondata($pagename, $previous);
461 if ($prevdata['author_id'] == $versiondata['author_id']) {
462 // This is a minor revision, previous version is
463 // by the same author. We will merge the
465 $cache->update_versiondata($pagename, $previous,
466 array('%content' => $versiondata['%content'],
467 '_supplanted' => $versiondata['_supplanted']));
472 $cache->delete_versiondata($pagename, $version);
478 * Create a new revision of a WikiDB_Page.
482 * @param $content string Contents of new revision.
484 * @param $metadata hash Metadata for new revision.
485 * All values in the hash should be scalars (strings or integers).
488 * @param $version int Version number for new revision.
489 * To ensure proper serialization of edits, $version must be
490 * exactly one higher than the current latest version.
491 * (You can defeat this check by setting $version to
492 * WIKIDB_FORCE_CREATE --- not usually recommended.)
494 * @param $links array List of pagenames which this page links to.
496 * @return object Returns the new WikiDB_PageRevision object. If
497 * $version was incorrect, returns false
499 function createRevision($version, &$content, $metadata, $links) {
500 $backend = &$this->_wikidb->_backend;
501 $cache = &$this->_wikidb->_cache;
502 $pagename = &$this->_pagename;
506 $latestversion = $backend->get_latest_version($pagename);
507 $newversion = $latestversion + 1;
508 assert($newversion >= 1);
510 if ($version != WIKIDB_FORCE_CREATE && $version != $newversion) {
517 foreach ($data as $key => $val) {
518 if (empty($val) || $key[0] == '_' || $key[0] == '%')
522 assert(!empty($data['author_id']));
523 if (empty($data['author_id']))
524 @$data['author_id'] = $data['author'];
526 if (empty($data['mtime']))
527 $data['mtime'] = time();
529 if ($latestversion) {
530 // Ensure mtimes are monotonic.
531 $pdata = $cache->get_versiondata($pagename, $latestversion);
532 if ($data['mtime'] < $pdata['mtime']) {
533 trigger_error(sprintf(_("%s: Date of new revision is %s"),
534 $pagename,"'non-monotonic'"),
536 $data['orig_mtime'] = $data['mtime'];
537 $data['mtime'] = $pdata['mtime'];
540 // FIXME: use (possibly user specified) 'mtime' time or
542 $cache->update_versiondata($pagename, $latestversion,
543 array('_supplanted' => $data['mtime']));
546 $data['%content'] = &$content;
548 $cache->set_versiondata($pagename, $newversion, $data);
550 //$cache->update_pagedata($pagename, array(':latestversion' => $newversion,
551 //':deleted' => empty($content)));
553 $backend->set_links($pagename, $links);
557 // FIXME: probably should have some global state information
558 // in the backend to control when to optimize.
559 if (time() % 50 == 0) {
560 trigger_error(sprintf(_("Optimizing %s"),'backend'), E_USER_NOTICE);
561 $backend->optimize();
564 return new WikiDB_PageRevision($this->_wikidb, $pagename, $newversion,
569 * Get the most recent revision of a page.
573 * @return object The current WikiDB_PageRevision object.
575 function getCurrentRevision() {
576 $backend = &$this->_wikidb->_backend;
577 $cache = &$this->_wikidb->_cache;
578 $pagename = &$this->_pagename;
581 $version = $cache->get_latest_version($pagename);
582 $revision = $this->getRevision($version);
589 * Get a specific revision of a WikiDB_Page.
593 * @param $version integer Which revision to get.
595 * @return object The requested WikiDB_PageRevision object, or
596 * false if the requested revision does not exist in the WikiDB.
597 * Note that version zero of any page always exists.
599 function getRevision($version) {
600 $cache = &$this->_wikidb->_cache;
601 $pagename = &$this->_pagename;
604 return new WikiDB_PageRevision($this->_wikidb, $pagename, 0);
606 assert($version > 0);
607 $vdata = $cache->get_versiondata($pagename, $version);
610 return new WikiDB_PageRevision($this->_wikidb, $pagename, $version,
615 * Get previous page revision.
617 * This method find the most recent revision before a specified
622 * @param $version integer Find most recent revision before this version.
623 * You can also use a WikiDB_PageRevision object to specify the $version.
625 * @return object The requested WikiDB_PageRevision object, or false if the
626 * requested revision does not exist in the WikiDB. Note that
627 * unless $version is greater than zero, a revision (perhaps version zero,
628 * the default revision) will always be found.
630 function getRevisionBefore($version) {
631 $backend = &$this->_wikidb->_backend;
632 $pagename = &$this->_pagename;
634 $version = $this->_coerce_to_version($version);
639 $previous = $backend->get_previous_version($pagename, $version);
640 $revision = $this->getRevision($previous);
647 * Get all revisions of the WikiDB_Page.
649 * This does not include the version zero (default) revision in the
650 * returned revision set.
652 * @return object a WikiDB_PageRevisionIterator containing all
653 * revisions of this WikiDB_Page in reverse order by version
656 function getAllRevisions() {
657 $backend = &$this->_wikidb->_backend;
658 $revs = $backend->get_all_revisions($this->_pagename);
659 return new WikiDB_PageRevisionIterator($this->_wikidb, $revs);
663 * Find pages which link to or are linked from a page.
667 * @param $reversed enum Which links to find: true for backlinks (default).
669 * @return object A WikiDB_PageIterator containing all matching pages.
671 function getLinks($reversed = true) {
672 $backend = &$this->_wikidb->_backend;
673 $result = $backend->get_links($this->_pagename, $reversed);
674 return new WikiDB_PageIterator($this->_wikidb, $result);
678 * Access WikiDB_Page meta-data.
682 * @param $key string Which meta data to get.
683 * Some reserved meta-data keys are:
685 * <dt>'locked'<dd> Is page locked?
686 * <dt>'hits' <dd> Page hit counter.
687 * <dt>'pref' <dd> Users preferences, stored in homepages.
688 * <dt>'owner' <dd> Default: first author_id. We might add a group with a dot here:
690 * <dt>'perm' <dd> Permission flag to authorize read/write/execution of
691 * page-headers and content.
692 * <dt>'score' <dd> Page score (not yet implement, do we need?)
695 * @return scalar The requested value, or false if the requested data
699 $cache = &$this->_wikidb->_cache;
700 if (!$key || $key[0] == '%')
702 $data = $cache->get_pagedata($this->_pagename);
703 return isset($data[$key]) ? $data[$key] : false;
707 * Get all the page meta-data as a hash.
709 * @return hash The page meta-data.
711 function getMetaData() {
712 $cache = &$this->_wikidb->_cache;
713 $data = $cache->get_pagedata($this->_pagename);
715 foreach ($data as $key => $val) {
716 if (!empty($val) && $key[0] != '%')
723 * Set page meta-data.
728 * @param $key string Meta-data key to set.
729 * @param $newval string New value.
731 function set($key, $newval) {
732 $cache = &$this->_wikidb->_cache;
733 $pagename = &$this->_pagename;
735 assert($key && $key[0] != '%');
737 $data = $cache->get_pagedata($pagename);
739 if (!empty($newval)) {
740 if (!empty($data[$key]) && $data[$key] == $newval)
741 return; // values identical, skip update.
744 if (empty($data[$key]))
745 return; // values identical, skip update.
748 // special handling of sensitive pref data or upgrades from older versions:
749 if ($key == 'pref') {
750 if (!empty($newval['userid'])) unset($newval['userid']);
751 //if ($GLOBALS['user']->isAdmin()) unset($newval['passwd']);
753 $cache->update_pagedata($pagename, array($key => $newval));
757 * Increase page hit count.
759 * FIXME: IS this needed? Probably not.
761 * This is a convenience function.
762 * <pre> $page->increaseHitCount(); </pre>
763 * is functionally identical to
764 * <pre> $page->set('hits',$page->get('hits')+1); </pre>
766 * Note that this method may be implemented in more efficient ways
767 * in certain backends.
771 function increaseHitCount() {
772 @$newhits = $this->get('hits') + 1;
773 $this->set('hits', $newhits);
777 * Return a string representation of the WikiDB_Page
779 * This is really only for debugging.
783 * @return string Printable representation of the WikiDB_Page.
785 function asString () {
787 printf("[%s:%s\n", get_class($this), $this->getName());
788 print_r($this->getMetaData());
790 $strval = ob_get_contents();
798 * @param $version_or_pagerevision int or object
799 * Takes either the version number (and int) or a WikiDB_PageRevision
801 * @return int The version number.
803 function _coerce_to_version($version_or_pagerevision) {
804 if (method_exists($version_or_pagerevision, "getContent"))
805 $version = $version_or_pagerevision->getVersion();
807 $version = (int) $version_or_pagerevision;
809 assert($version >= 0);
813 function isUserPage ($include_empty = true) {
814 return $this->get('pref') ? true : false;
817 $current = $this->getCurrentRevision();
818 return ! $current->hasDefaultContents();
824 * This class represents a specific revision of a WikiDB_Page within
827 * A WikiDB_PageRevision has read-only semantics. You may only create
828 * new revisions (and delete old ones) --- you cannot modify existing
831 class WikiDB_PageRevision
833 function WikiDB_PageRevision(&$wikidb, $pagename, $version,
834 $versiondata = false)
836 $this->_wikidb = &$wikidb;
837 $this->_pagename = $pagename;
838 $this->_version = $version;
839 $this->_data = $versiondata ? $versiondata : array();
843 * Get the WikiDB_Page which this revision belongs to.
847 * @return object The WikiDB_Page which this revision belongs to.
850 return new WikiDB_Page($this->_wikidb, $this->_pagename);
854 * Get the version number of this revision.
858 * @return int The version number of this revision.
860 function getVersion() {
861 return $this->_version;
865 * Determine whether this revision has defaulted content.
867 * The default revision (version 0) of each page, as well as any
868 * pages which are created with empty content have their content
869 * defaulted to something like:
871 * Describe [ThisPage] here.
876 * @return boolean Returns true if the page has default content.
878 function hasDefaultContents() {
879 $data = &$this->_data;
880 return empty($data['%content']);
884 * Get the content as an array of lines.
888 * @return array An array of lines.
889 * The lines should contain no trailing white space.
891 function getContent() {
892 return explode("\n", $this->getPackedContent());
896 * Get the pagename of the revision.
900 * @return string pagename.
902 function getPageName() {
903 return $this->_pagename;
907 * Determine whether revision is the latest.
911 * @return bool True iff the revision is the latest (most recent) one.
913 function isCurrent() {
914 if (!isset($this->_iscurrent)) {
915 $page = $this->getPage();
916 $current = $page->getCurrentRevision();
917 $this->_iscurrent = $this->getVersion() == $current->getVersion();
919 return $this->_iscurrent;
923 * Get the content as a string.
927 * @return string The page content.
928 * Lines are separated by new-lines.
930 function getPackedContent() {
931 $data = &$this->_data;
934 if (empty($data['%content'])) {
935 // Replace empty content with default value.
936 return sprintf(_("Describe %s here."),
937 "[". $this->_pagename ."]");
940 // There is (non-default) content.
941 assert($this->_version > 0);
943 if (!is_string($data['%content'])) {
944 // Content was not provided to us at init time.
945 // (This is allowed because for some backends, fetching
946 // the content may be expensive, and often is not wanted
949 // In any case, now we need to get it.
950 $data['%content'] = $this->_get_content();
951 assert(is_string($data['%content']));
954 return $data['%content'];
957 function _get_content() {
958 $cache = &$this->_wikidb->_cache;
959 $pagename = $this->_pagename;
960 $version = $this->_version;
962 assert($version > 0);
964 $newdata = $cache->get_versiondata($pagename, $version, true);
966 assert(is_string($newdata['%content']));
967 return $newdata['%content'];
970 // else revision has been deleted... What to do?
971 return __sprintf("Acck! Revision %s of %s seems to have been deleted!",
972 $version, $pagename);
977 * Get meta-data for this revision.
982 * @param $key string Which meta-data to access.
984 * Some reserved revision meta-data keys are:
986 * <dt> 'mtime' <dd> Time this revision was created (seconds since midnight Jan 1, 1970.)
987 * The 'mtime' meta-value is normally set automatically by the database
988 * backend, but it may be specified explicitly when creating a new revision.
990 * <dd> To ensure consistency of RecentChanges, the mtimes of the versions
991 * of a page must be monotonically increasing. If an attempt is
992 * made to create a new revision with an mtime less than that of
993 * the preceeding revision, the new revisions timestamp is force
994 * to be equal to that of the preceeding revision. In that case,
995 * the originally requested mtime is preserved in 'orig_mtime'.
996 * <dt> '_supplanted' <dd> Time this revision ceased to be the most recent.
997 * This meta-value is <em>always</em> automatically maintained by the database
998 * backend. (It is set from the 'mtime' meta-value of the superceding
999 * revision.) '_supplanted' has a value of 'false' for the current revision.
1001 * FIXME: this could be refactored:
1003 * <dd> Author of the page (as he should be reported in, e.g. RecentChanges.)
1005 * <dd> Authenticated author of a page. This is used to identify
1006 * the distinctness of authors when cleaning old revisions from
1008 * <dt> 'is_minor_edit' <dd> Set if change was marked as a minor revision by the author.
1009 * <dt> 'summary' <dd> Short change summary entered by page author.
1012 * Meta-data keys must be valid C identifers (they have to start with a letter
1013 * or underscore, and can contain only alphanumerics and underscores.)
1015 * @return string The requested value, or false if the requested value
1018 function get($key) {
1019 if (!$key || $key[0] == '%')
1021 $data = &$this->_data;
1022 return isset($data[$key]) ? $data[$key] : false;
1026 * Get all the revision page meta-data as a hash.
1028 * @return hash The revision meta-data.
1030 function getMetaData() {
1032 foreach ($this->_data as $key => $val) {
1033 if (!empty($val) && $key[0] != '%')
1041 * Return a string representation of the revision.
1043 * This is really only for debugging.
1047 * @return string Printable representation of the WikiDB_Page.
1049 function asString () {
1051 printf("[%s:%d\n", get_class($this), $this->get('version'));
1052 print_r($this->_data);
1053 echo $this->getPackedContent() . "\n]\n";
1054 $strval = ob_get_contents();
1062 * A class which represents a sequence of WikiDB_Pages.
1064 class WikiDB_PageIterator
1066 function WikiDB_PageIterator(&$wikidb, &$pages) {
1067 $this->_pages = $pages;
1068 $this->_wikidb = &$wikidb;
1072 * Get next WikiDB_Page in sequence.
1076 * @return object The next WikiDB_Page in the sequence.
1079 if ( ! ($next = $this->_pages->next()) )
1082 $pagename = &$next['pagename'];
1083 if (isset($next['pagedata']))
1084 $this->_wikidb->_cache->cache_data($next);
1086 return new WikiDB_Page($this->_wikidb, $pagename);
1090 * Release resources held by this iterator.
1092 * The iterator may not be used after free() is called.
1094 * There is no need to call free(), if next() has returned false.
1095 * (I.e. if you iterate through all the pages in the sequence,
1096 * you do not need to call free() --- you only need to call it
1097 * if you stop before the end of the iterator is reached.)
1102 $this->_pages->free();
1106 function setSortby ($arg = false) {
1108 $arg = @$_GET['sortby'];
1110 $sortby = substr($arg,1);
1111 $order = substr($arg,0,1)=='+' ? 'ASC' : 'DESC';
1114 if (is_array($arg)) { // array('mtime' => 'desc')
1121 // available column types to sort by:
1122 // todo: we must provide access methods for the generic dumb/iterator
1123 $this->_types = explode(',','pagename,mtime,hits,version,author,locked,minor,markup');
1124 if (in_array($sortby,$this->_types))
1125 $this->_options['sortby'] = $sortby;
1127 trigger_error(fmt("Argument %s '%s' ignored",'sortby',$sortby), E_USER_WARNING);
1128 if (in_array(strtoupper($order),'ASC','DESC'))
1129 $this->_options['order'] = strtoupper($order);
1131 trigger_error(fmt("Argument %s '%s' ignored",'order',$order), E_USER_WARNING);
1137 * A class which represents a sequence of WikiDB_PageRevisions.
1139 class WikiDB_PageRevisionIterator
1141 function WikiDB_PageRevisionIterator(&$wikidb, &$revisions) {
1142 $this->_revisions = $revisions;
1143 $this->_wikidb = &$wikidb;
1147 * Get next WikiDB_PageRevision in sequence.
1151 * @return object The next WikiDB_PageRevision in the sequence.
1154 if ( ! ($next = $this->_revisions->next()) )
1157 $this->_wikidb->_cache->cache_data($next);
1159 $pagename = $next['pagename'];
1160 $version = $next['version'];
1161 $versiondata = $next['versiondata'];
1162 assert(!empty($pagename));
1163 assert(is_array($versiondata));
1164 assert($version > 0);
1166 return new WikiDB_PageRevision($this->_wikidb, $pagename, $version,
1171 * Release resources held by this iterator.
1173 * The iterator may not be used after free() is called.
1175 * There is no need to call free(), if next() has returned false.
1176 * (I.e. if you iterate through all the revisions in the sequence,
1177 * you do not need to call free() --- you only need to call it
1178 * if you stop before the end of the iterator is reached.)
1183 $this->_revisions->free();
1189 * Data cache used by WikiDB.
1191 * FIXME: Maybe rename this to caching_backend (or some such).
1197 // FIXME: beautify versiondata cache. Cache only limited data?
1199 function WikiDB_cache (&$backend) {
1200 $this->_backend = &$backend;
1202 $this->_pagedata_cache = array();
1203 $this->_versiondata_cache = array();
1204 array_push ($this->_versiondata_cache, array());
1205 $this->_glv_cache = array();
1209 $this->_pagedata_cache = false;
1210 $this->_versiondata_cache = false;
1211 $this->_glv_cache = false;
1214 function get_pagedata($pagename) {
1215 assert(is_string($pagename) && $pagename);
1216 $cache = &$this->_pagedata_cache;
1218 if (!isset($cache[$pagename]) || !is_array($cache[$pagename])) {
1219 $cache[$pagename] = $this->_backend->get_pagedata($pagename);
1220 if (empty($cache[$pagename]))
1221 $cache[$pagename] = array();
1224 return $cache[$pagename];
1227 function update_pagedata($pagename, $newdata) {
1228 assert(is_string($pagename) && $pagename);
1230 $this->_backend->update_pagedata($pagename, $newdata);
1232 if (is_array($this->_pagedata_cache[$pagename])) {
1233 $cachedata = &$this->_pagedata_cache[$pagename];
1234 foreach($newdata as $key => $val)
1235 $cachedata[$key] = $val;
1239 function invalidate_cache($pagename) {
1240 unset ($this->_pagedata_cache[$pagename]);
1241 unset ($this->_versiondata_cache[$pagename]);
1242 unset ($this->_glv_cache[$pagename]);
1245 function delete_page($pagename) {
1246 $this->_backend->delete_page($pagename);
1247 unset ($this->_pagedata_cache[$pagename]);
1248 unset ($this->_glv_cache[$pagename]);
1252 function cache_data($data) {
1253 if (isset($data['pagedata']))
1254 $this->_pagedata_cache[$data['pagename']] = $data['pagedata'];
1257 function get_versiondata($pagename, $version, $need_content = false) {
1258 // FIXME: Seriously ugly hackage
1259 if (defined ('USECACHE')){ //temporary - for debugging
1260 assert(is_string($pagename) && $pagename);
1261 // there is a bug here somewhere which results in an assertion failure at line 105
1262 // of ArchiveCleaner.php It goes away if we use the next line.
1263 $need_content = true;
1264 $nc = $need_content ? '1':'0';
1265 $cache = &$this->_versiondata_cache;
1266 if (!isset($cache[$pagename][$version][$nc])||
1267 !(is_array ($cache[$pagename])) || !(is_array ($cache[$pagename][$version]))) {
1268 $cache[$pagename][$version][$nc] =
1269 $this->_backend->get_versiondata($pagename,$version, $need_content);
1270 // If we have retrieved all data, we may as well set the cache for $need_content = false
1272 $cache[$pagename][$version]['0'] = $cache[$pagename][$version]['1'];
1275 $vdata = $cache[$pagename][$version][$nc];
1279 $vdata = $this->_backend->get_versiondata($pagename, $version, $need_content);
1282 if ($vdata && !empty($vdata['%pagedata']))
1283 $this->_pagedata_cache[$pagename] = $vdata['%pagedata'];
1287 function set_versiondata($pagename, $version, $data) {
1288 $new = $this->_backend->
1289 set_versiondata($pagename, $version, $data);
1291 $this->_versiondata_cache[$pagename][$version]['1'] = $data;
1293 $this->_versiondata_cache[$pagename][$version]['0'] = $data;
1294 // Is this necessary?
1295 unset($this->_glv_cache[$pagename]);
1299 function update_versiondata($pagename, $version, $data) {
1300 $new = $this->_backend->
1301 update_versiondata($pagename, $version, $data);
1303 $this->_versiondata_cache[$pagename][$version]['1'] = $data;
1305 $this->_versiondata_cache[$pagename][$version]['0'] = $data;
1306 // Is this necessary?
1307 unset($this->_glv_cache[$pagename]);
1311 function delete_versiondata($pagename, $version) {
1312 $new = $this->_backend->
1313 delete_versiondata($pagename, $version);
1314 unset ($this->_versiondata_cache[$pagename][$version]['1']);
1315 unset ($this->_versiondata_cache[$pagename][$version]['0']);
1316 unset ($this->_glv_cache[$pagename]);
1319 function get_latest_version($pagename) {
1320 if(defined('USECACHE')){
1321 assert (is_string($pagename) && $pagename);
1322 $cache = &$this->_glv_cache;
1323 if (!isset($cache[$pagename])) {
1324 $cache[$pagename] = $this->_backend->get_latest_version($pagename);
1325 if (empty($cache[$pagename]))
1326 $cache[$pagename] = 0;
1328 return $cache[$pagename];}
1330 return $this->_backend->get_latest_version($pagename);
1337 * FIXME! Class for externally authenticated users.
1339 * We might have read-only access to the password and/or group membership,
1340 * or we might even be able to update the entries.
1342 * FIXME: This was written before we stored prefs as %pagedata, so
1349 function WikiDB_User($userid, $authlevel = false) {
1350 $this->_authdb = new WikiAuthDB($GLOBALS['DBAuthParams']);
1351 $this->_authmethod = 'AuthDB';
1352 WikiUser::WikiUser($userid, $authlevel);
1356 function getPreferences() {
1357 // external prefs override internal ones?
1358 if (! $this->_authdb->getPrefs() )
1359 if ($pref = WikiUser::getPreferences())
1364 function setPreferences($prefs) {
1365 if (! $this->_authdb->setPrefs($prefs) )
1366 return WikiUser::setPreferences();
1371 return $this->_authdb->exists($this->_userid);
1374 // create user and default user homepage
1375 function createUser ($pref) {
1376 if ($this->exists()) return;
1377 if (! $this->_authdb->createUser($pref)) {
1378 // external auth doesn't allow this.
1379 // do our policies allow local users instead?
1380 return WikiUser::createUser($pref);
1384 function checkPassword($passwd) {
1385 return $this->_authdb->pwcheck($this->userid, $passwd);
1388 function changePassword($passwd) {
1389 if (! $this->mayChangePassword() ) {
1390 trigger_error(sprintf("Attempt to change an external password for '%s'",
1391 $this->_userid), E_USER_ERROR);
1394 return $this->_authdb->changePass($this->userid, $passwd);
1397 function mayChangePassword() {
1398 return $this->_authdb->auth_update;
1405 var $auth_dsn = false, $auth_check = false;
1406 var $auth_crypt_method = 'crypt', $auth_update = false;
1407 var $group_members = false, $user_groups = false;
1408 var $pref_update = false, $pref_select = false;
1411 function WikiAuthDB($DBAuthParams) {
1412 foreach ($DBAuthParams as $key => $value) {
1413 $this->$key = $value;
1415 if (!$this->auth_dsn) {
1416 trigger_error(_("no \$DBAuthParams['dsn'] provided"), E_USER_ERROR);
1419 // compare auth DB to the existing page DB. reuse if it's on the same database.
1420 if (isa($this->_backend, 'WikiDB_backend_PearDB') and
1421 $this->_backend->_dsn == $this->auth_dsn) {
1422 $this->_dbh = &$this->_backend->_dbh;
1423 return $this->_backend;
1425 include_once("lib/WikiDB/SQL.php");
1426 return new WikiDB_SQL($DBAuthParams);
1429 function param_missing ($param) {
1430 trigger_error(sprintf(_("No \$DBAuthParams['%s'] provided."), $param), E_USER_ERROR);
1434 function getPrefs($prefs) {
1435 if ($this->pref_select) {
1436 $statement = $this->_backend->Prepare($this->pref_select);
1437 return unserialize($this->_backend->Execute($statement,
1438 $prefs->get('userid')));
1440 param_missing('pref_select');
1445 function setPrefs($prefs) {
1446 if ($this->pref_write) {
1447 $statement = $this->_backend->Prepare($this->pref_write);
1448 return $this->_backend->Execute($statement,
1449 $prefs->get('userid'), serialize($prefs->_prefs));
1451 param_missing('pref_write');
1456 function createUser ($pref) {
1457 if ($this->user_create) {
1458 $statement = $this->_backend->Prepare($this->user_create);
1459 return $this->_backend->Execute($statement,
1460 $prefs->get('userid'), serialize($prefs->_prefs));
1462 param_missing('user_create');
1467 function exists($userid) {
1468 if ($this->user_check) {
1469 $statement = $this->_backend->Prepare($this->user_check);
1470 return $this->_backend->Execute($statement, $prefs->get('userid'));
1472 param_missing('user_check');
1477 function pwcheck($userid, $pass) {
1478 if ($this->auth_check) {
1479 $statement = $this->_backend->Prepare($this->auth_check);
1480 return $this->_backend->Execute($statement, $userid, $pass);
1482 param_missing('auth_check');
1491 // c-basic-offset: 4
1492 // c-hanging-comment-ender-p: nil
1493 // indent-tabs-mode: nil