function load_settings()
{
global $Now;
// load settings from database
$this->settings = array();
$this->settingTexts = array();
foreach ($this->opt_override ?: [] as $k => $v) {
if ($v === null) {
unset($this->opt[$k]);
} else {
$this->opt[$k] = $v;
}
}
$this->opt_override = [];
$this->_pc_seeall_cache = null;
$this->deadlineCache = null;
$result = $this->q_raw("select name, value, data from Settings");
while ($result && ($row = $result->fetch_row())) {
$this->settings[$row[0]] = (int) $row[1];
if ($row[2] !== null) {
$this->settingTexts[$row[0]] = $row[2];
}
if (substr($row[0], 0, 4) == "opt.") {
$okey = substr($row[0], 4);
$this->opt_override[$okey] = get($this->opt, $okey);
$this->opt[$okey] = $row[2] === null ? (int) $row[1] : $row[2];
}
}
Dbl::free($result);
// update schema
$this->sversion = $this->settings["allowPaperOption"];
if ($this->sversion < 108) {
require_once "updateschema.php";
$old_nerrors = Dbl::$nerrors;
updateSchema($this);
Dbl::$nerrors = $old_nerrors;
}
// invalidate all caches after loading from backup
if (isset($this->settings["frombackup"]) && $this->invalidate_caches()) {
$this->qe_raw("delete from Settings where name='frombackup' and value=" . $this->settings["frombackup"]);
unset($this->settings["frombackup"]);
} else {
$this->invalidate_caches(["rf" => true]);
}
// update options
if (isset($this->opt["ldapLogin"]) && !$this->opt["ldapLogin"]) {
unset($this->opt["ldapLogin"]);
}
if (isset($this->opt["httpAuthLogin"]) && !$this->opt["httpAuthLogin"]) {
unset($this->opt["httpAuthLogin"]);
}
// set conferenceKey
if (!isset($this->opt["conferenceKey"])) {
if (!isset($this->settingTexts["conf_key"]) && ($key = hotcrp_random_bytes(32)) !== false) {
$this->save_setting("conf_key", 1, $key);
}
$this->opt["conferenceKey"] = get($this->settingTexts, "conf_key", "");
}
// set capability key
if (!get($this->settings, "cap_key") && !get($this->opt, "disableCapabilities") && !(($key = hotcrp_random_bytes(16)) !== false && ($key = base64_encode($key)) && $this->save_setting("cap_key", 1, $key))) {
$this->opt["disableCapabilities"] = true;
}
// GC old capabilities
if (defval($this->settings, "__capability_gc", 0) < $Now - 86400) {
foreach (array($this->dblink, Contact::contactdb()) as $db) {
if ($db) {
Dbl::ql($db, "delete from Capability where timeExpires>0 and timeExpires<{$Now}");
}
}
$this->q_raw("insert into Settings (name, value) values ('__capability_gc', {$Now}) on duplicate key update value=values(value)");
$this->settings["__capability_gc"] = $Now;
}
$this->crosscheck_settings();
$this->crosscheck_options();
}
