/*
Database functions:
MakePageHash($dbhash)
MakeDBHash($pagename, $pagehash)
OpenDataBase($dbname)
CloseDataBase($dbi)
RetrievePage($dbi, $pagename)
InsertPage($dbi, $pagename, $pagehash)
IsWikiPage($dbi, $pagename)
InitTitleSearch($dbi, $search)
TitleSearchNextMatch($dbi, &$pos)
InitFullSearch($dbi, $search)
FullSearchNextMatch($dbi, &$pos)
*/
// open a database and return the handle
// ignores MAX_DBM_ATTEMPTS
function OpenDataBase($dbinfo) {
global $msql_db;
if (! ($dbc = msql_pconnect())) {
echo "Cannot establish connection to database, giving up.";
echo "Error message: ", msql_error(), "
\n";
exit();
}
if (!msql_select_db($msql_db, $dbc)) {
echo "Cannot open database $msql_db, giving up.";
echo "Error message: ", msql_error(), "
\n";
exit();
}
$dbi['dbc'] = $dbc;
$dbi['table'] = $dbinfo['table']; // page metadata
$dbi['page_table'] = $dbinfo['page_table']; // page content
// echo "dbi[page_table]: $dbi[page_table], dbinfo[page_table]: $dbinfo[page_table]
\n";
return $dbi;
}
function CloseDataBase($dbi) {
// NOP function
// msql connections are established as persistant
// they cannot be closed through msql_close()
}
// Take form data and prepare it for the db
function MakeDBHash($pagename, $pagehash)
{
$pagehash["pagename"] = addslashes($pagename);
if (!isset($pagehash["flags"]))
$pagehash["flags"] = 0;
$pagehash["author"] = addslashes($pagehash["author"]);
$pagehash["refs"] = serialize($pagehash["refs"]);
return $pagehash;
}
// Take db data and prepare it for display
function MakePageHash($dbhash)
{
// unserialize/explode content
$dbhash['refs'] = unserialize($dbhash['refs']);
// retrieve page lines from other table
// $dbhash['content'] = explode("\n", $dbhash['content']);
return $dbhash;
}
// Return hash of page + attributes or default
function RetrievePage($dbi, $pagename) {
$pagename = addslashes($pagename);
$query = "select * from $dbi[table] where pagename='$pagename'";
if ($res = msql_query($query, $dbi['dbc'])) {
$dbhash = msql_fetch_array($res);
$query = "select lineno,line from $dbi[page_table] " .
"where pagename='$pagename' " .
"order by lineno";
if ($res = msql_query($query, $dbi[dbc])) {
$dbhash["content"] = array();
while ($row = msql_fetch_array($res)) {
$dbhash["content"][ $row["lineno"] ] = $row["line"];
}
}
return MakePageHash($dbhash);
}
return -1;
}
// Either insert or replace a key/value (a page)
function InsertPage($dbi, $pagename, $pagehash)
{
$pagehash = MakeDBHash($pagename, $pagehash);
// temporary hack until the time stuff is brought up to date
$pagehash["created"] = time();
$pagehash["lastmodified"] = time();
if (IsWikiPage($dbi, $pagename)) {
$PAIRS = "author='$pagehash[author]'," .
"created=$pagehash[created]," .
"flags=$pagehash[flags]," .
"lastmodified=$pagehash[lastmodified]," .
"pagename='$pagehash[pagename]'," .
"refs='$pagehash[refs]'," .
"version=$pagehash[version]";
$query = "UPDATE $dbi[table] SET $PAIRS WHERE pagename='$pagename'";
} else {
// do an insert
// build up the column names and values for the query
$COLUMNS = "author, created, flags, lastmodified, " .
"pagename, refs, version";
$VALUES = "'$pagehash[author]', " .
"$pagehash[created], $pagehash[flags], " .
"$pagehash[lastmodified], '$pagehash[pagename]', " .
"'$pagehash[refs]', $pagehash[version]";
$query = "INSERT INTO $dbi[table] ($COLUMNS) VALUES($VALUES)";
}
// echo "
Query: $query
\n";
// first, insert the metadata
$retval = msql_query($query, $dbi['dbc']);
if ($retval == false)
echo "Insert/update failed: ", msql_error(), "
\n";
// second, insert the page data
// remove old data from page_table
$query = "delete from $dbi[page_table] where pagename='$pagename'";
//echo "Delete query: $query
\n";
$retval = msql_query($query, $dbi['dbc']);
if ($retval == false)
echo "Delete on $dbi[page_table] failed: ", msql_error(), "
\n";
// insert the new lines
reset($pagehash["content"]);
for ($x = 0; $x < count($pagehash["content"]); $x++) {
$line = addslashes($pagehash["content"][$x]);
$query = "INSERT INTO $dbi[page_table] " .
"(pagename, lineno, line) " .
"VALUES('$pagename', $x, '$line')";
//echo "Page line insert query: $query
\n";
$retval = msql_query($query, $dbi['dbc']);
if ($retval == false)
echo "Insert into $dbi[page_table] failed: ", msql_error(), "
\n";;
}
}
function IsWikiPage($dbi, $pagename) {
$pagename = addslashes($pagename);
$query = "select pagename from $dbi[table] where pagename='$pagename'";
// echo "Query: $query
\n";
if ($res = msql_query($query, $dbi['dbc'])) {
return(msql_affected_rows($res));
}
}
// setup for title-search
function InitTitleSearch($dbi, $search) {
$search = addslashes($search);
$query = "select pagename from $dbi[table] " .
"where pagename clike '%$search%' order by pagename";
$res = msql_query($query, $dbi["dbc"]);
return $res;
}
// iterating through database
function TitleSearchNextMatch($dbi, $res) {
if($o = msql_fetch_object($res)) {
return $o->pagename;
}
else {
return 0;
}
}
// setup for full-text search
function InitFullSearch($dbi, $search) {
$search = addslashes($search);
$query = "select * from $dbi[table] where searchterms clike '%$search%'";
$res = msql_query($query, $dbi["dbc"]);
return $res;
}
// iterating through database
function FullSearchNextMatch($dbi, $res) {
if($hash = msql_fetch_array($res)) {
return MakePageHash($hash);
} else {
return 0;
}
}
?>