<?php rcs_id('$Id$');
/*
Database functions:
OpenDataBase($dbname)
CloseDataBase($dbi)
MakeDBHash($pagename, $pagehash)
MakePageHash($dbhash)
RetrievePage($dbi, $pagename, $pagestore)
InsertPage($dbi, $pagename, $pagehash)
SaveCopyToArchive($dbi, $pagename, $pagehash)
IsWikiPage($dbi, $pagename)
IsInArchive($dbi, $pagename)
RemovePage($dbi, $pagename)
IncreaseHitCount($dbi, $pagename)
GetHitCount($dbi, $pagename)
MakeSQLSearchClause($search, $column)
InitTitleSearch($dbi, $search)
TitleSearchNextMatch($dbi, $res)
InitFullSearch($dbi, $search)
FullSearchNextMatch($dbi, $res)
InitBackLinkSearch($dbi, $pagename)
BackLinkSearchNextMatch($dbi, &$pos)
InitMostPopular($dbi, $limit)
MostPopularNextMatch($dbi, $res)
GetAllWikiPageNames($dbi)
GetWikiPageLinks($dbi, $pagename)
SetWikiPageLinks($dbi, $pagename, $linklist)
*/
// open a database and return the handle
// ignores MAX_DBM_ATTEMPTS
function OpenDataBase($dbname) {
global $mysql_server, $mysql_user, $mysql_pwd, $mysql_db;
if (!($dbc = mysql_pconnect($mysql_server, $mysql_user, $mysql_pwd))) {
$msg = gettext ("Cannot establish connection to database, giving up.");
$msg .= "<BR>";
$msg .= sprintf(gettext ("MySQL error: %s"), mysql_error());
ExitWiki($msg);
}
if (!mysql_select_db($mysql_db, $dbc)) {
$msg = sprintf(gettext ("Cannot open database %s, giving up."), $mysql_db);
$msg .= "<BR>";
$msg .= sprintf(gettext ("MySQL error: %s"), mysql_error());
ExitWiki($msg);
}
$dbi['dbc'] = $dbc;
$dbi['table'] = $dbname;
return $dbi;
}
function CloseDataBase($dbi) {
// NOP function
// mysql connections are established as persistant
// they cannot be closed through mysql_close()
}
// prepare $pagehash for storing in mysql
function MakeDBHash($pagename, $pagehash)
{
$pagehash["pagename"] = addslashes($pagename);
if (!isset($pagehash["flags"]))
$pagehash["flags"] = 0;
$pagehash["author"] = addslashes($pagehash["author"]);
$pagehash["content"] = implode("\n", $pagehash["content"]);
$pagehash["content"] = addslashes($pagehash["content"]);
if (!isset($pagehash["refs"]))
$pagehash["refs"] = array();
$pagehash["refs"] = serialize($pagehash["refs"]);
return $pagehash;
}
// convert mysql result $dbhash to $pagehash
function MakePageHash($dbhash)
{
// unserialize/explode content
$dbhash['refs'] = unserialize($dbhash['refs']);
$dbhash['content'] = explode("\n", $dbhash['content']);
return $dbhash;
}
// Return hash of page + attributes or default
function RetrievePage($dbi, $pagename, $pagestore) {
$pagename = addslashes($pagename);
if ($res = mysql_query("select * from $pagestore where pagename='$pagename'", $dbi['dbc'])) {
if ($dbhash = mysql_fetch_array($res)) {
return MakePageHash($dbhash);
}
}
return -1;
}
// Either insert or replace a key/value (a page)
function InsertPage($dbi, $pagename, $pagehash)
{
global $WikiPageStore; // ugly hack
if ($dbi['table'] == $WikiPageStore) { // HACK
$linklist = ExtractWikiPageLinks($pagehash['content']);
SetWikiPageLinks($dbi, $pagename, $linklist);
}
$pagehash = MakeDBHash($pagename, $pagehash);
$COLUMNS = "author, content, created, flags, " .
"lastmodified, pagename, refs, version";
$VALUES = "'$pagehash[author]', '$pagehash[content]', " .
"$pagehash[created], $pagehash[flags], " .
"$pagehash[lastmodified], '$pagehash[pagename]', " .
"'$pagehash[refs]', $pagehash[version]";
if (!mysql_query("replace into $dbi[table] ($COLUMNS) values ($VALUES)",
$dbi['dbc'])) {
$msg = sprintf(gettext ("Error writing page '%s'"), $pagename);
$msg .= "<BR>";
$msg .= sprintf(gettext ("MySQL error: %s"), mysql_error());
ExitWiki($msg);
}
}
// for archiving pages to a seperate dbm
function SaveCopyToArchive($dbi, $pagename, $pagehash) {
global $ArchivePageStore;
$adbi = OpenDataBase($ArchivePageStore);
InsertPage($adbi, $pagename, $pagehash);
}
function IsWikiPage($dbi, $pagename) {
$pagename = addslashes($pagename);
if ($res = mysql_query("select count(*) from $dbi[table] where pagename='$pagename'", $dbi['dbc'])) {
return(mysql_result($res, 0));
}
return 0;
}
function IsInArchive($dbi, $pagename) {
global $ArchivePageStore;
$pagename = addslashes($pagename);
if ($res = mysql_query("select count(*) from $ArchivePageStore where pagename='$pagename'", $dbi['dbc'])) {
return(mysql_result($res, 0));
}
return 0;
}
function RemovePage($dbi, $pagename) {
global $WikiPageStore, $ArchivePageStore;
global $WikiLinksStore, $HitCountStore, $WikiScoreStore;
$pagename = addslashes($pagename);
$msg = gettext ("Cannot delete '%s' from table '%s'");
$msg .= "<br>\n";
$msg .= gettext ("MySQL error: %s");
if (!mysql_query("delete from $WikiPageStore where pagename='$pagename'", $dbi['dbc']))
ExitWiki(sprintf($msg, $pagename, $WikiPageStore, mysql_error()));
if (!mysql_query("delete from $ArchivePageStore where pagename='$pagename'", $dbi['dbc']))
ExitWiki(sprintf($msg, $pagename, $ArchivePageStore, mysql_error()));
if (!mysql_query("delete from $WikiLinksStore where frompage='$pagename'", $dbi['dbc']))
ExitWiki(sprintf($msg, $pagename, $WikiLinksStore, mysql_error()));
if (!mysql_query("delete from $HitCountStore where pagename='$pagename'", $dbi['dbc']))
ExitWiki(sprintf($msg, $pagename, $HitCountStore, mysql_error()));
if (!mysql_query("delete from $WikiScoreStore where pagename='$pagename'", $dbi['dbc']))
ExitWiki(sprintf($msg, $pagename, $WikiScoreStore, mysql_error()));
}
function IncreaseHitCount($dbi, $pagename)
{
global $HitCountStore;
$qpagename = addslashes($pagename);
$res = mysql_query("update $HitCountStore set hits=hits+1"
. " where pagename='$qpagename'",
$dbi['dbc']);
if (!mysql_affected_rows($dbi['dbc'])) {
$res = mysql_query("insert into $HitCountStore (pagename, hits)"
. " values ('$qpagename', 1)",
$dbi['dbc']);
}
return $res;
}
function GetHitCount($dbi, $pagename)
{
global $HitCountStore;
$qpagename = addslashes($pagename);
$res = mysql_query("select hits from $HitCountStore"
. " where pagename='$qpagename'",
$dbi['dbc']);
if (mysql_num_rows($res))
$hits = mysql_result($res, 0);
else
$hits = "0";
return $hits;
}
function MakeSQLSearchClause($search, $column)
{
$search = preg_replace("/\s+/", " ", trim($search));
$search = preg_replace('/(?=[%_\\\\])/', "\\", $search);
$search = addslashes($search);
$term = strtok($search, ' ');
$clause = '';
while($term) {
$word = strtolower("$term");
if ($word[0] == '-') {
$word = substr($word, 1);
$clause .= "not (LCASE($column) like '%$word%') ";
} else {
$clause .= "(LCASE($column) like '%$word%') ";
}
if ($term = strtok(' '))
$clause .= 'AND ';
}
return $clause;
}
// setup for title-search
function InitTitleSearch($dbi, $search) {
$clause = MakeSQLSearchClause($search, 'pagename');
$res = mysql_query("select pagename from $dbi[table] where $clause order by pagename", $dbi["dbc"]);
return $res;
}
// iterating through database
function TitleSearchNextMatch($dbi, $res) {
if($o = mysql_fetch_object($res)) {
return $o->pagename;
}
else {
return 0;
}
}
// setup for full-text search
function InitFullSearch($dbi, $search) {
$clause = MakeSQLSearchClause($search, 'content');
$res = mysql_query("select * from $dbi[table] where $clause", $dbi["dbc"]);
return $res;
}
// iterating through database
function FullSearchNextMatch($dbi, $res) {
if($hash = mysql_fetch_array($res)) {
return MakePageHash($hash);
}
else {
return 0;
}
}
// setup for back-link search
function InitBackLinkSearch($dbi, $pagename) {
global $WikiLinksStore;
$topage = addslashes($pagename);
$res = mysql_query( "SELECT DISTINCT frompage FROM $WikiLinksStore"
. " WHERE topage='$topage'"
. " ORDER BY frompage",
$dbi["dbc"]);
return $res;
}
// iterating through database
function BackLinkSearchNextMatch($dbi, $res) {
if($a = mysql_fetch_row($res)) {
return $a[0];
}
else {
return 0;
}
}
function InitMostPopular($dbi, $limit) {
global $HitCountStore;
$res = mysql_query("select * from $HitCountStore order by hits desc, pagename limit $limit", $dbi["dbc"]);
return $res;
}
function MostPopularNextMatch($dbi, $res) {
if ($hits = mysql_fetch_array($res))
return $hits;
else
return 0;
}
function GetAllWikiPageNames($dbi) {
global $WikiPageStore;
$res = mysql_query("select pagename from $WikiPageStore", $dbi["dbc"]);
$rows = mysql_num_rows($res);
for ($i = 0; $i < $rows; $i++) {
$pages[$i] = mysql_result($res, $i);
}
return $pages;
}
////////////////////////////////////////
// functionality for the wikilinks table
// takes a page name, returns array of scored incoming and outgoing links
function GetWikiPageLinks($dbi, $pagename) {
global $WikiLinksStore, $WikiScoreStore, $HitCountStore;
$pagename = addslashes($pagename);
$res = mysql_query("select topage, score from $WikiLinksStore, $WikiScoreStore where topage=pagename and frompage='$pagename' order by score desc, topage");
$rows = mysql_num_rows($res);
for ($i = 0; $i < $rows; $i++) {
$out = mysql_fetch_array($res);
$links['out'][] = array($out['topage'], $out['score']);
}
$res = mysql_query("select frompage, score from $WikiLinksStore, $WikiScoreStore where frompage=pagename and topage='$pagename' order by score desc, frompage");
$rows = mysql_num_rows($res);
for ($i = 0; $i < $rows; $i++) {
$out = mysql_fetch_array($res);
$links['in'][] = array($out['frompage'], $out['score']);
}
$res = mysql_query("select distinct pagename, hits from $WikiLinksStore, $HitCountStore where (frompage=pagename and topage='$pagename') or (topage=pagename and frompage='$pagename') order by hits desc, pagename");
$rows = mysql_num_rows($res);
for ($i = 0; $i < $rows; $i++) {
$out = mysql_fetch_array($res);
$links['popular'][] = array($out['pagename'], $out['hits']);
}
return $links;
}
// takes page name, list of links it contains
// the $linklist is an array where the keys are the page names
function SetWikiPageLinks($dbi, $pagename, $linklist) {
global $WikiLinksStore, $WikiScoreStore;
$frompage = addslashes($pagename);
// first delete the old list of links
mysql_query("delete from $WikiLinksStore where frompage='$frompage'",
$dbi["dbc"]);
// the page may not have links, return if not
if (! count($linklist))
return;
// now insert the new list of links
while (list($topage, $count) = each($linklist)) {
$topage = addslashes($topage);
if($topage != $frompage) {
mysql_query("insert into $WikiLinksStore (frompage, topage) " .
"values ('$frompage', '$topage')", $dbi["dbc"]);
}
}
// update pagescore
mysql_query("delete from $WikiScoreStore", $dbi["dbc"]);
mysql_query("insert into $WikiScoreStore select w1.topage, count(*) from $WikiLinksStore as w1, $WikiLinksStore as w2 where w2.topage=w1.frompage group by w1.topage", $dbi["dbc"]);
}
/* more mysql queries:
orphans:
select pagename from wiki left join wikilinks on pagename=topage where topage is NULL;
*/
?>
