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<?php
/*
* vvv - API to Panel - vvv
*/
HandleParameters();
/**
* Handles the API parameters.
*/
function HandleParameters()
{
$get = Request::get('get', 0, 'string');
$uuid = Request::get('uuid', false, 'string');
$output = false;
if ($get === "timestamp") {
$output = array('ts' => getLastChangeTs($uuid));
} elseif ($get === "machines") {
$locationIds = LocationInfo::getLocationsOr404($uuid);
$output = array();
InfoPanel::appendMachineData($output, $locationIds, true);
$output = array_values($output);
} elseif ($get === "config") {
$type = InfoPanel::getConfig($uuid, $output);
if ($type === false) {
http_response_code(404);
die('Panel not found');
}
} elseif ($get === "pcstates") {
$locationIds = LocationInfo::getLocationsOr404($uuid);
$output = getPcStates($locationIds, $uuid);
} elseif ($get === "locationtree") {
$locationIds = LocationInfo::getLocationsOr404($uuid);
$output = getLocationTree($locationIds);
} elseif ($get === "calendar") {
$locationIds = LocationInfo::getLocationsOr404($uuid);
$output = getCalendar($locationIds);
}
if ($output !== false) {
Header('Content-Type: application/json; charset=utf-8');
echo json_encode($output);
} else {
http_response_code(404);
echo 'Unknown get option';
}
}
/**
* Get last config modification timestamp for given panel.
* This is incomplete however, as it wouldn't react to the
* linked room plan being edited, or added/removed PCs
* etc. So the advice would simply be "if you want the
* panel to reload automatically, hit the edit button
* and click save". Might even add a shortcut
* reload-button to the list of panels at some point.
*
* @param string $paneluuid panels uuid
* @return int UNIX_TIMESTAMP
*/
function getLastChangeTs($paneluuid)
{
$panel = Database::queryFirst('SELECT lastchange, locationids FROM locationinfo_panel WHERE paneluuid = :paneluuid',
compact('paneluuid'));
if ($panel === false) {
http_response_code(404);
die('Panel not found');
}
$lastChange = array((int)$panel['lastchange']);
if (!empty($panel['locationids'])) {
$res = Database::simpleQuery('SELECT lastchange FROM locationinfo_locationconfig
WHERE locationid IN (:locs)', array('locs' => explode(',', $panel['locationids'])));
while (($lc = $res->fetchColumn()) !== false) {
$lastChange[] = (int)$lc;
}
}
return max($lastChange);
}
/**
* Gets the pc states of the given locations.
*
* @param int[] $idList list of the location ids.
* @return array aggregated PC states
*/
function getPcStates($idList, $paneluuid)
{
$pcStates = array();
foreach ($idList as $id) {
$pcStates[$id] = array(
'id' => $id,
'idle' => 0,
'occupied' => 0,
'offline' => 0,
'broken' => 0,
'standby' => 0,
);
}
$locationInfoList = array();
InfoPanel::appendMachineData($locationInfoList, $idList);
$panel = Database::queryFirst('SELECT paneluuid, panelconfig FROM locationinfo_panel WHERE paneluuid = :paneluuid',
compact('paneluuid'));
$config = json_decode($panel['panelconfig'], true);
foreach ($locationInfoList as $locationInfo) {
$id = $locationInfo['id'];
foreach ($locationInfo['machines'] as $pc) {
$key = strtolower($pc['pcState']);
if (isset($pcStates[$id][$key])) {
if ($config['roomplanner']) {
if (isset($pc['x']) && isset($pc['y'])) {
$pcStates[$id][$key]++;
}
} else {
$pcStates[$id][$key]++;
}
}
}
}
return array_values($pcStates);
}
/**
* Gets the location tree of the given locations.
*
* @param int[] $idList Array list of the locations.
* @return array location tree data
*/
function getLocationTree($idList)
{
if (in_array(0, $idList)) {
return array_values(Location::getTree());
}
$locations = Location::getTree();
$ret = findLocations($locations, $idList);
return $ret;
}
function findLocations($locations, $idList)
{
$ret = array();
foreach ($locations as $location) {
if (in_array($location['locationid'], $idList)) {
$ret[] = $location;
} elseif (!empty($location['children'])) {
$ret = array_merge($ret, findLocations($location['children'], $idList));
}
}
return $ret;
}
// ########## <Calendar> ###########
/**
* Gets the calendar of the given ids.
*
* @param int[] $idList list with the location ids.
* @return array Calendar.
*/
function getCalendar($idList)
{
if (empty($idList))
return [];
// Build SQL query for multiple ids.
$query = "SELECT l.locationid, l.serverid, l.serverlocationid, s.servertype, s.credentials
FROM `locationinfo_locationconfig` AS l
INNER JOIN locationinfo_coursebackend AS s ON (s.serverid = l.serverid)
WHERE l.locationid IN (:idlist)
ORDER BY s.servertype ASC";
$dbquery = Database::simpleQuery($query, array('idlist' => array_values($idList)));
$serverList = array();
while ($dbresult = $dbquery->fetch(PDO::FETCH_ASSOC)) {
if (!isset($serverList[$dbresult['serverid']])) {
$serverList[$dbresult['serverid']] = array(
'credentials' => json_decode($dbresult['credentials'], true),
'type' => $dbresult['servertype'],
'idlist' => array()
);
}
$serverList[$dbresult['serverid']]['idlist'][] = $dbresult['locationid'];
}
$resultArray = array();
foreach ($serverList as $serverid => $server) {
$serverInstance = CourseBackend::getInstance($server['type']);
if ($serverInstance === false) {
EventLog::warning('Cannot fetch schedule for location (' . implode(', ', $server['idlist']) . ')'
. ': Backend type ' . $server['type'] . ' unknown. Disabling location.');
Database::exec("UPDATE locationinfo_locationconfig SET serverid = NULL WHERE locationid IN (:lid)",
array('lid' => $server['idlist']));
continue;
}
$credentialsOk = $serverInstance->setCredentials($serverid, $server['credentials']);
if ($credentialsOk) {
$calendarFromBackend = $serverInstance->fetchSchedule($server['idlist']);
} else {
$calendarFromBackend = array();
}
LocationInfo::setServerError($serverid, $serverInstance->getErrors());
if (is_array($calendarFromBackend)) {
foreach ($calendarFromBackend as $key => $value) {
$resultArray[] = array(
'id' => $key,
'calendar' => $value,
);
}
}
}
return $resultArray;
}
// ########## </Calendar> ##########
|
