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<?php // -*-php-*-
rcs_id('$Id: flatfile.php,v 1.2 2007/02/17 20:25:41 rurban Exp $');
/**
Copyright 1999,2005,2006 $ThePhpWikiProgrammingTeam
This file is part of PhpWiki.
PhpWiki is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
PhpWiki is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PhpWiki; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* Backend for handling file storage as pure, readable flatfiles,
* as with PageDump. All other methods are taken from file, which
* handles serialized pages.
* latest version_data is it page_data/
* previous ver_data is at ver_data/
* latest_ver should not be needed (todo)
*
* Author: Reini Urban, based on the file backend by Jochen Kalmbach
*/
require_once('lib/WikiDB/backend/file.php');
require_once('lib/loadsave.php');
class WikiDB_backend_flatfile
extends WikiDB_backend_file
{
// *********************************************************************
// common file load / save functions:
// FilenameForPage is from loadsave.php
function _pagename2filename($type, $pagename, $version) {
$fpagename = FilenameForPage($pagename);
if (strstr($fpagename, "/")) {
$fpagename = preg_replace("/\//", "%2F", $fpagename);
}
return $this->_dir_names[$type].'/'.$fpagename;
/* if ($version == 0)
return $this->_dir_names[$type].'/'.FilenameForPage($pagename);
else
return $this->_dir_names[$type].'/'.FilenameForPage($pagename).'--'.$version;
*/
}
// Load/Save Page-Data
function _loadPageData($pagename) {
if ($this->_page_data != NULL) {
if ($this->_page_data['pagename'] == $pagename) {
return $this->_page_data;
}
}
//$pd = $this->_loadPage('page_data', $pagename, 0);
$filename = $this->_pagename2filename('page_data', $pagename, 0);
if (!file_exists($filename)) return NULL;
if (!filesize($filename)) return array();
if ($fd = @fopen($filename, "rb")) {
$locked = flock($fd, 1); // Read lock
if (!$locked) {
ExitWiki("Timeout while obtaining lock. Please try again");
}
if ($data = fread($fd, filesize($filename))) {
// This is the only difference from file:
if ($parts = ParseMimeifiedPages($data)) {
$pd = $parts[0];
}
//if ($set_pagename == true)
$pd['pagename'] = $pagename;
//if ($version != 0) $pd['version'] = $version;
if (!is_array($pd))
ExitWiki(sprintf(gettext("'%s': corrupt file"),
htmlspecialchars($filename)));
}
fclose($fd);
}
if ($pd != NULL)
$this->_page_data = $pd;
if ($this->_page_data != NULL) {
if ($this->_page_data['pagename'] == $pagename) {
return $this->_page_data;
}
}
return array(); // no values found
}
/** Store latest version as full page_data flatfile,
* earlier versions as file backend ver_data.
* _cached_html will not be stored.
* If the given ($pagename,$version) is already in the database,
* this method completely overwrites any stored data for that version.
*/
function _saveVersionData($pagename, $version, $data) {
// check if this is a newer version:
if ($this->_getLatestVersion($pagename) < $version) {
// write new latest-version-info
$this->_setLatestVersion($pagename, $version);
// save it as latest page, not serialized version hash
// TODO: load latest version data and merge it with new pagedata
$this->_savePageData($pagename, array('versiondata' => $data));
} else { // save/update old version data hash
$this->_savePage('ver_data', $pagename, $version, $data);
}
}
// This is different to file and not yet finished.
// TODO: fields not being saved as page_data should be saved to ver_data
// Store as full page_data flatfile
// pagedata: date, pagename, hits
// versiondata: _cached_html and the rest
function _savePageData($pagename, $data) {
$type = 'page_data';
$version = 1;
$filename = $this->_pagename2filename($type, $pagename, $version);
// Construct a dummy page_revision object
$page = new WikiDB_Page($this->_wikidb, $pagename);
// data may be pagedate or versiondata updates
if (USECACHE and empty($data['pagedata'])) {
$cache =& $this->_wikidb->_cache;
if (!empty($cache->_pagedata_cache[$pagename])
and is_array($cache->_pagedata_cache[$pagename]))
{
$cachedata = &$cache->_pagedata_cache[$pagename];
foreach($data as $key => $val)
$cachedata[$key] = $val;
} else {
$cache->_pagedata_cache[$pagename] = $data;
}
}
//unset ($data['pagedata']);
//if (empty($data['versiondata']))
// $data['versiondata'] = $data;
// TODO:
// with versiondata merge it with previous pagedata, not to overwrite with empty pagedata
// with pagedata merge it with previous versiondata, not to overwrite with empty versiondata (content)
$olddata = $this->_loadPageData($pagename);
if (isset($data['version'])) {
$version = $data['version'];
$latestversion = $this->_getLatestVersion($pagename);
if ($latestversion < $version) {
$oldversiondata = $this->_loadVersionData($pagename, $latestversion);
if ($oldversiondata)
$olddata['versiondata'] = array_merge($oldversiondata, $olddata['versiondata']);
}
}
$data['pagedata'] = array_merge($olddata['pagedata'], $data['pagedata']);
$data['versiondata'] = array_merge($olddata['versiondata'], $data['versiondata']);
if (empty($data['versiondata']['%content']))
$data['versiondata']['%content'] = $olddata['content'];
$current = new WikiDB_PageRevision($this->_wikidb, $pagename, $version, $data['versiondata']);
unset ($data['versiondata']);
foreach ($data as $k => $v) {
if ($k == 'pagedata')
$current->_data = array_merge($current->_data, $v);
elseif ($k == 'versiondata')
$current->_data = array_merge($current->_data, $v);
else
$current->_data[$k] = $v;
}
$this->_page_data = $current->_data;
$pagedata = "Date: " . Rfc2822DateTime($current->get('mtime')) . "\r\n";
$pagedata .= sprintf("Mime-Version: 1.0 (Produced by PhpWiki %s)\r\n",
PHPWIKI_VERSION);
$pagedata .= MimeifyPageRevision($page, $current);
if ($fd = fopen($filename, 'a+b')) {
$locked = flock($fd, 2); // Exclusive blocking lock
if (!$locked) {
ExitWiki("Timeout while obtaining lock. Please try again");
}
rewind($fd);
ftruncate($fd, 0);
$len = strlen($pagedata);
$num = fwrite($fd, $pagedata, $len);
assert($num == $len);
fclose($fd);
} else {
ExitWiki("Error while writing page '$pagename'");
}
}
};
//class WikiDB_backend_flatfile_iter extends WikiDB_backend_file_iter {};
// $Log: flatfile.php,v $
// Revision 1.2 2007/02/17 20:25:41 rurban
// improve _savepage a bit. still not working though.
//
// Revision 1.1 2007/01/02 13:19:47 rurban
// new flatfile backend (readable page files)
//
//
// For emacs users
// Local Variables:
// mode: php
// tab-width: 8
// c-basic-offset: 4
// c-hanging-comment-ender-p: nil
// indent-tabs-mode: nil
// End:
?>
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