userid != $user->id) {
fail("We have no record of that computer");
}
return $host;
}
// invariant: old_host.create_time < new_host.create_time
//
function merge_hosts($old_host, $new_host) {
if ($old_host->id == $new_host->id) {
fail("same host");
}
if (!hosts_compatible($old_host, $new_host)) {
fail("
Can't merge host $old_host->id into $new_host->id - they're incompatible");
}
echo "
Merging host $old_host->id into host $new_host->id\n";
// decay the average credit of both hosts
//
$now = time();
update_average($now, 0, 0, $old_host->expavg_credit, $old_host->expavg_time);
update_average($now, 0, 0, $new_host->expavg_credit, $new_host->expavg_time);
// update the database:
// - add credit from old to new host
// - change results to refer to new host
// - put old host in "zombie" state
// - update rpc_seqno if needed
//
$total_credit = $old_host->total_credit + $new_host->total_credit;
$recent_credit = $old_host->expavg_credit + $new_host->expavg_credit;
$result = mysql_query("update host set total_credit=$total_credit, expavg_credit=$recent_credit, expavg_time=$now where id=$new_host->id");
if (!$result) {
fail("Couldn't update credit of new computer");
}
$result = mysql_query("update result set hostid=$new_host->id where hostid=$old_host->id");
if (!$result) {
fail("Couldn't update results");
}
$result = mysql_query("update host set total_credit=0, expavg_credit=0, userid=0, rpc_seqno=$new_host->id where id=$old_host->id");
if (!$result) {
fail("Couldn't retire old computer");
}
echo "
Retired old computer $old_host->id\n";
}
db_init();
$user = get_logged_in_user();
page_head("Merge computer records");
$nhosts = get_int("nhosts");
$hostid = get_int("id_0");
$latest_host = get_host($hostid, $user);
for ($i=1; $i<$nhosts; $i++) {
$var = "id_$i";
$hostid = get_int($var, true);
if (!$hostid) continue;
$host = get_host($hostid, $user);
if ($host->create_time > $latest_host->create_time) {
merge_hosts($latest_host, $host);
$latest_host = $host;
} else {
merge_hosts($host, $latest_host);
}
// reread latest_host from database since we just
// updated its credits
//
$latest_host = lookup_host($latest_host->id);
}
echo "
Return to list of your computers
";
page_tail();
//Header("Location: show_host_detail.php?hostid=$latest_host->id");
?>