first rough version of exams-module.

1 files changed, 68 insertions, 60 deletions

diff --git a/modules-available/dozmod/api.inc.php b/modules-available/dozmod/api.inc.php
index 52c8dcfb..b37c668c 100644
--- a/modules-available/dozmod/api.inc.php
+++ b/modules-available/dozmod/api.inc.php
@@ -11,7 +11,7 @@
 
 
 if (!Module::isAvailable('locations')) {
-	die('require locations module');
+    die('require locations module');
 }
 
 
@@ -23,52 +23,52 @@ $availableRessources = ['vmx', 'test', 'netrules'];
 
 function cache_hash($obj)
 {
-	return md5(serialize($obj));
+    return md5(serialize($obj));
 }
 
 function cache_key_to_filename($key)
 {
-	return "/tmp/bwlp-slxadmin-cache-$key"; // TODO: hash
+    return "/tmp/bwlp-slxadmin-cache-$key"; // TODO: hash
 }
 
 function cache_put($key, $value)
 {
-	$filename = cache_key_to_filename($key);
-	file_put_contents($filename, $value);
+    $filename = cache_key_to_filename($key);
+    file_put_contents($filename, $value);
 }
 
 function cache_has($key)
 {
-	$filename = cache_key_to_filename($key);
-	$mtime = filemtime($filename);
+    $filename = cache_key_to_filename($key);
+    $mtime = filemtime($filename);
 
-	if (!$mtime) {
-		return false; // cache miss
-	}
-	if (time() - $mtime > CONFIG_DOZMOD_EXPIRE) {
-		return false;
-	} else {
-		return true;
-	}
+    if (!$mtime) {
+        return false; // cache miss
+    }
+    if (time() - $mtime > CONFIG_DOZMOD_EXPIRE) {
+        return false;
+    } else {
+        return true;
+    }
 }
 
 
 function cache_get($key)
 {
-	$filename = cache_key_to_filename($key);
-	return file_get_contents($filename);
+    $filename = cache_key_to_filename($key);
+    return file_get_contents($filename);
 }
 
 /* good for large binary files */
 function cache_get_passthru($key)
 {
-	$filename = cache_key_to_filename($key);
-	$fp = fopen($filename, "r");
-	if ($fp) {
-		fpassthru($fp);
-	} else {
-		Util::traceError("cannot open file");
-	}
+    $filename = cache_key_to_filename($key);
+    $fp = fopen($filename, "r");
+    if ($fp) {
+        fpassthru($fp);
+    } else {
+        Util::traceError("cannot open file");
+    }
 }
 
 /* END: Cache ---------------------------------------------------- */
@@ -88,56 +88,64 @@ function println($str) { echo "$str\n"; }
 * */
 function _getLecturesForLocations($locationIds)
 {
-	$ids = implode('%20', $locationIds);
-	$url = LIST_URL . "?locations=$ids";
-	$responseXML = Download::asString($url, 60, $code);
-	$xml = new SimpleXMLElement($responseXML);
 
-	$uuids = [];
-	foreach ($xml->eintrag as $e) {
-		$uuids[] = strval($e->uuid['param'][0]);
-	}
-	return $uuids;
+    /* if in any of the locations there is an exam active, consider the client
+    to be in "exam-mode" and only offer him exams (no lectures) */
+    $examMode = false;
+
+    if (Module::isAvailable('exams')) {
+        $examMode = Exams::isInExamMode($locationIds);
+    }
+    $ids = implode('%20', $locationIds);
+    $url = LIST_URL . "?locations=$ids" . ($examMode ? '&exams' : '');
+    $responseXML = Download::asString($url, 60, $code);
+    $xml = new SimpleXMLElement($responseXML);
+
+    $uuids = [];
+    foreach ($xml->eintrag as $e) {
+        $uuids[] = strval($e->uuid['param'][0]);
+    }
+    return $uuids;
 }
 
 /** Caching wrapper around _getLecturesForLocations() */
 function getLecturesForLocations($locationIds)
 {
-	$key = 'lectures_' . cache_hash($locationIds);
-	if (cache_has($key)) {
-		return unserialize(cache_get($key));
-	} else {
-		$value = _getLecturesForLocations($locationIds);
-		cache_put($key, serialize($value));
-		return $value;
-	}
+    $key = 'lectures_' . cache_hash($locationIds);
+    if (cache_has($key)) {
+        return unserialize(cache_get($key));
+    } else {
+        $value = _getLecturesForLocations($locationIds);
+        cache_put($key, serialize($value));
+        return $value;
+    }
 }
 
 function _getVMX($lecture_uuid)
 {
-	$url = VMX_URL . '/' . $lecture_uuid;
-	$response = Download::asString($url, 60, $code);
-	return $response;
+    $url = VMX_URL . '/' . $lecture_uuid;
+    $response = Download::asString($url, 60, $code);
+    return $response;
 }
 
 /** Caching wrapper around _getVMX() **/
 function getVMX($lecture_uuid)
 {
-	$key = 'vmx_' . $lecture_uuid;
-	if (cache_has($key)) {
-		cache_get_passthru($key);
-	} else {
-		$value = _getVMX($lecture_uuid);
-		cache_put($key, $value);
-		return $value;
-	}
+    $key = 'vmx_' . $lecture_uuid;
+    if (cache_has($key)) {
+        cache_get_passthru($key);
+    } else {
+        $value = _getVMX($lecture_uuid);
+        cache_put($key, $value);
+        return $value;
+    }
 }
 
 
 // -----------------------------------------------------------------------------//
 $ip = $_SERVER['REMOTE_ADDR'];
 if (substr($ip, 0, 7) === '::ffff:') {
-	$ip = substr($ip, 7);
+    $ip = substr($ip, 7);
 }
 
 /* request data, don't trust */
@@ -145,10 +153,10 @@ $resource   = Request::get('resource', false, 'string');
 $lecture    = Request::get('lecture', false, 'string');
 
 if ($resource === false) {
-	Util::traceError("you have to specify the 'resource' parameter");
+    Util::traceError("you have to specify the 'resource' parameter");
 }
 if ($lecture === false) {
-	Util::traceError("you have to specify the 'lecture' parameter");
+    Util::traceError("you have to specify the 'lecture' parameter");
 }
 
 /* lookup location id(s) */
@@ -161,18 +169,18 @@ $lectures = getLecturesForLocations($location_ids);
 /* validate request -------------------------------------------- */
 /* check resources */
 if (!in_array($resource, $availableRessources)) {
-	Util::traceError("unknown resource: $resource");
+    Util::traceError("unknown resource: $resource");
 }
 
 /* check that the user requests a lecture that he is allowed to have */
 if (!in_array($lecture, $lectures)) {
-	Util::traceError("client is not allowed to access this lecture: $lecture");
+    Util::traceError("client is not allowed to access this lecture: $lecture");
 }
 
 if ($resource === 'vmx') {
-	echo getVMX($lecture);
+    echo getVMX($lecture);
 } else if ($resource === 'test') {
-	echo "Here's your special test data!";
+    echo "Here's your special test data!";
 } else {
-	echo "I don't know how to give you that resource";
+    echo "I don't know how to give you that resource";
 }