peardb.php

PhpWiki是sourceforge的一个开源项目

    /* some variables and functions for DB backend abstraction (action=upgrade) */
    function database () {
        return $this->_dbh->dsn['database'];
    }
    function backendType() {
        return $this->_dbh->phptype;
    }
    function connection() {
        return $this->_dbh->connection;
    }
    function getRow($query) {
        return $this->_dbh->getRow($query);
    }

    function listOfTables() {
        return $this->_dbh->getListOf('tables');
    }
    function listOfFields($database,$table) {
        if ($this->backendType() == 'mysql') {
            $fields = array();
            assert(!empty($database));
            assert(!empty($table));
  	    $result = mysql_list_fields($database, $table, $this->_dbh->connection) or 
  	        trigger_error(__FILE__.':'.__LINE__.' '.mysql_error(), E_USER_WARNING);
  	    if (!$result) return array();
              $columns = mysql_num_fields($result);
            for ($i = 0; $i < $columns; $i++) {
                $fields[] = mysql_field_name($result, $i);
            }
            mysql_free_result($result);
            return $fields;
        } else {
            // TODO: try ADODB version?
            trigger_error("Unsupported dbtype and backend. Either switch to ADODB or check it manually.");
        }
    }

};

/**
 * This class is a generic iterator.
 *
 * WikiDB_backend_PearDB_iter only iterates over things that have
 * 'pagename', 'pagedata', etc. etc.
 *
 * Probably WikiDB_backend_PearDB_iter and this class should be merged
 * (most of the code is cut-and-paste :-( ), but I am trying to make
 * changes that could be merged easily.
 *
 * @author: Dan Frankowski
 */
class WikiDB_backend_PearDB_generic_iter
extends WikiDB_backend_iterator
{
    function WikiDB_backend_PearDB_generic_iter($backend, $query_result, $field_list = NULL) {
        if (DB::isError($query_result)) {
            // This shouldn't happen, I thought.
            $backend->_pear_error_callback($query_result);
        }
        
        $this->_backend = &$backend;
        $this->_result = $query_result;
    }

    function count() {
        if (!$this->_result)
            return false;
        return $this->_result->numRows();
    }
    
    function next() {
        $backend = &$this->_backend;
        if (!$this->_result)
            return false;

        $record = $this->_result->fetchRow(DB_FETCHMODE_ASSOC);
        if (!$record) {
            $this->free();
            return false;
        }
        
        return $record;
    }

    function free () {
        if ($this->_result) {
            $this->_result->free();
            $this->_result = false;
        }
    }
}

class WikiDB_backend_PearDB_iter
extends WikiDB_backend_PearDB_generic_iter
{

    function next() {
        $backend = &$this->_backend;
        if (!$this->_result)
            return false;

        $record = $this->_result->fetchRow(DB_FETCHMODE_ASSOC);
        if (!$record) {
            $this->free();
            return false;
        }
        
        $pagedata = $backend->_extract_page_data($record);
        $rec = array('pagename' => $record['pagename'],
                     'pagedata' => $pagedata);

        if (!empty($record['version'])) {
            $rec['versiondata'] = $backend->_extract_version_data($record);
            $rec['version'] = $record['version'];
        }
        
        return $rec;
    }
}

// word search
class WikiDB_backend_PearDB_search
extends WikiDB_backend_search
{
    function WikiDB_backend_PearDB_search(&$search, &$dbh) {
        $this->_dbh = $dbh;
        $this->_case_exact = $search->_case_exact;
    }
    function _pagename_match_clause($node) { 
        $word = $node->sql();
        if ($node->op == 'REGEX') { // posix regex extensions
            if (preg_match("/mysql/i", $this->_dbh->phptype))
                return "pagename REGEXP '$word'";
        } else {
            return ($this->_case_exact 
                    ? "pagename LIKE '$word'" 
                    : "LOWER(pagename) LIKE '$word'");
        }
    }
    function _fulltext_match_clause($node) { 
        $word = $node->sql();
        return $this->_pagename_match_clause($node)
               // probably convert this MATCH AGAINST or SUBSTR/POSITION without wildcards
               . ($this->_case_exact ? " OR content LIKE '$word'" 
                                     : " OR LOWER(content) LIKE '$word'");
    }
}

// $Log: PearDB.php,v $
// Revision 1.87  2005/02/10 19:04:24  rurban
// move getRow up one level to our backend class
//
// Revision 1.86  2005/01/29 19:51:02  rurban
// Bugs item #1077769 fixed by frugal.
// Deleted the wrong page. Fix all other tables also.
//
// Revision 1.85  2005/01/25 08:03:35  rurban
// support DATABASE_PERSISTENT besides dsn database?persistent=false; move lock_count up (per Charles Corrigan)
//
// Revision 1.84  2005/01/18 20:55:47  rurban
// reformatting and two bug fixes: adding missing parens
//
// Revision 1.83  2005/01/18 10:11:29  rurban
// Oops. Again thanks to Charles Corrigan
//
// Revision 1.82  2005/01/18 08:55:51  rurban
// fix quoting
//
// Revision 1.81  2005/01/17 08:53:09  rurban
// pagedata fix by Charles Corrigan
//
// Revision 1.80  2004/12/22 18:33:31  rurban
// fix page _id_cache logic for _get_pageid create_if_missing
//
// Revision 1.79  2004/12/10 02:45:27  rurban
// SQL optimization:
//   put _cached_html from pagedata into a new seperate blob, not huge serialized string.
//   it is only rarelely needed: for current page only, if-not-modified
//   but was extracted for every simple page iteration.
//
// Revision 1.78  2004/12/08 12:55:51  rurban
// support new non-destructive delete_page via generic backend method
//
// Revision 1.77  2004/12/06 19:50:04  rurban
// enable action=remove which is undoable and seeable in RecentChanges: ADODB ony for now.
// renamed delete_page to purge_page.
// enable action=edit&version=-1 to force creation of a new version.
// added BABYCART_PATH config
// fixed magiqc in adodb.inc.php
// and some more docs
//
// Revision 1.76  2004/11/30 17:45:53  rurban
// exists_links backend implementation
//
// Revision 1.75  2004/11/28 20:42:33  rurban
// Optimize PearDB _extract_version_data and _extract_page_data.
//
// Revision 1.74  2004/11/27 14:39:05  rurban
// simpified regex search architecture:
//   no db specific node methods anymore,
//   new sql() method for each node
//   parallel to regexp() (which returns pcre)
//   regex types bitmasked (op's not yet)
// new regex=sql
// clarified WikiDB::quote() backend methods:
//   ->quote() adds surrounsing quotes
//   ->qstr() (new method) assumes strings and adds no quotes! (in contrast to ADODB)
//   pear and adodb have now unified quote methods for all generic queries.
//
// Revision 1.73  2004/11/26 18:39:02  rurban
// new regex search parser and SQL backends (90% complete, glob and pcre backends missing)
//
// Revision 1.72  2004/11/25 17:20:51  rurban
// and again a couple of more native db args: backlinks
//
// Revision 1.71  2004/11/23 13:35:48  rurban
// add case_exact search
//
// Revision 1.70  2004/11/21 11:59:26  rurban
// remove final \n to be ob_cache independent
//
// Revision 1.69  2004/11/20 17:49:39  rurban
// add fast exclude support to SQL get_all_pages
//
// Revision 1.68  2004/11/20 17:35:58  rurban
// improved WantedPages SQL backends
// PageList::sortby new 3rd arg valid_fields (override db fields)
// WantedPages sql pager inexact for performance reasons:
//   assume 3 wantedfrom per page, to be correct, no getTotal()
// support exclude argument for get_all_pages, new _sql_set()
//
// Revision 1.67  2004/11/10 19:32:24  rurban
// * optimize increaseHitCount, esp. for mysql.
// * prepend dirs to the include_path (phpwiki_dir for faster searches)
// * Pear_DB version logic (awful but needed)
// * fix broken ADODB quote
// * _extract_page_data simplification
//
// Revision 1.66  2004/11/10 15:29:21  rurban
// * requires newer Pear_DB (as the internal one): quote() uses now escapeSimple for strings
// * ACCESS_LOG_SQL: fix cause request not yet initialized
// * WikiDB: moved SQL specific methods upwards
// * new Pear_DB quoting: same as ADODB and as newer Pear_DB.
//   fixes all around: WikiGroup, WikiUserNew SQL methods, SQL logging
//
// Revision 1.65  2004/11/09 17:11:17  rurban
// * revert to the wikidb ref passing. there's no memory abuse there.
// * use new wikidb->_cache->_id_cache[] instead of wikidb->_iwpcache, to effectively
//   store page ids with getPageLinks (GleanDescription) of all existing pages, which
//   are also needed at the rendering for linkExistingWikiWord().
//   pass options to pageiterator.
//   use this cache also for _get_pageid()
//   This saves about 8 SELECT count per page (num all pagelinks).
// * fix passing of all page fields to the pageiterator.
// * fix overlarge session data which got broken with the latest ACCESS_LOG_SQL changes
//
// Revision 1.64  2004/11/07 16:02:52  rurban
// new sql access log (for spam prevention), and restructured access log class
// dbh->quote (generic)
// pear_db: mysql specific parts seperated (using replace)
//
// Revision 1.63  2004/11/01 10:43:58  rurban
// seperate PassUser methods into seperate dir (memory usage)
// fix WikiUser (old) overlarge data session
// remove wikidb arg from various page class methods, use global ->_dbi instead
// ...
//
// Revision 1.62  2004/10/14 19:19:34  rurban
// loadsave: check if the dumped file will be accessible from outside.
// and some other minor fixes. (cvsclient native not yet ready)
//
// Revision 1.61  2004/10/14 17:19:17  rurban
// allow most_popular sortby arguments
//
// Revision 1.60  2004/07/09 10:06:50  rurban
// Use backend specific sortby and sortable_columns method, to be able to
// select between native (Db backend) and custom (PageList) sorting.
// Fixed PageList::AddPageList (missed the first)
// Added the author/creator.. name to AllPagesBy...
//   display no pages if none matched.
// Improved dba and file sortby().
// Use &$request reference
//
// Revision 1.59  2004/07/08 21:32:36  rurban
// Prevent from more warnings, minor db and sort optimizations
//
// Revision 1.58  2004/07/08 16:56:16  rurban
// use the backendType abstraction
//
// Revision 1.57  2004/07/05 12:57:54  rurban
// add mysql timeout
//
// Revision 1.56  2004/07/04 10:24:43  rurban
// forgot the expressions
//
// Revision 1.55  2004/07/03 16:51:06  rurban
// optional DBADMIN_USER:DBADMIN_PASSWD for action=upgrade (if no ALTER permission)
// added atomic mysql REPLACE for PearDB as in ADODB
// fixed _lock_tables typo links => link
// fixes unserialize ADODB bug in line 180
//
// Revision 1.54  2004/06/29 08:52:24  rurban
// Use ...version() $need_content argument in WikiDB also:
// To reduce the memory footprint for larger sets of pagelists,
// we don't cache the content (only true or false) and
// we purge the pagedata (_cached_html) also.
// _cached_html is only cached for the current pagename.
// => Vastly improved page existance check, ACL check, ...
//
// Now only PagedList info=content or size needs the whole content, esp. if sortable.
//
// Revision 1.53  2004/06/27 10:26:03  rurban
// oci8 patch by Philippe Vanhaesendonck + some ADODB notes+fixes
//
// Revision 1.52  2004/06/25 14:15:08  rurban
// reduce memory footprint by caching only requested pagedate content (improving most page iterators)
//
// Revision 1.51  2004/05/12 10:49:55  rurban
// require_once fix for those libs which are loaded before FileFinder and
//   its automatic include_path fix, and where require_once doesn't grok
//   dirname(__FILE__) != './lib'
// upgrade fix with PearDB
// navbar.tmpl: remove spaces for IE &nbsp; button alignment
//
// Revision 1.50  2004/05/06 17:30:39  rurban
// CategoryGroup: oops, dos2unix eol
// improved phpwiki_version:
//   pre -= .0001 (1.3.10pre: 1030.099)
//   -p1 += .001 (1.3.9-p1: 1030.091)
// improved InstallTable for mysql and generic SQL versions and all newer tables so far.
// abstracted more ADODB/PearDB methods for action=upgrade stuff:
//   backend->backendType(), backend->database(),
//   backend->listOfFields(),
//   backend->listOfTables(),
//
// Revision 1.49  2004/05/03 21:35:30  rurban
// don't use persistent connections with postgres
//
// Revision 1.48  2004/04/26 20:44:35  rurban
// locking table specific for better databases
//
// Revision 1.47  2004/04/20 00:06:04  rurban
// themable paging support
//
// Revision 1.46  2004/04/19 21:51:41  rurban
// php5 compatibility: it works!
//
// Revision 1.45  2004/04/16 14:19:39  rurban
// updated ADODB notes
//

// (c-file-style: "gnu")
// Local Variables:
// mode: php
// tab-width: 8
// c-basic-offset: 4
// c-hanging-comment-ender-p: nil
// indent-tabs-mode: nil
// End:   
?>