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<?php
/*
praktrack - tracking the parts of a portfolio review
Copyright (C) 2026 Friedrich Beckmann <friedrich.beckmann@tha.de>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
*/
include "setup.php";
my_session_start();
$login=false;
if (isset($_SESSION["login"])) {
$login = $_SESSION["login"];
}
if ($login !== "admin") {
header("Location: index.php");
exit;
}
?>
<!DOCTYPE html>
<html>
<body>
<table>
<tr>
<td>
<a href="admin-addusers.php">Add students</a>
</td>
<td>
<a href="admin-show.php">Show students</a>
</td>
<td>
<a href="logout.php">Logout</a>
</td>
</tr>
</table>
<h1>Add Users</h1>
<p> Die Teilnehmer werden aus dem Moodlekurs der Veranstaltung übernommen.
Dazu die Teilnehmer als csv exportieren. Die csv Datei
dann mit den Angaben zum Kurs und zum Semester hier hochladen. Die
csv Datei enthält die Namen, Matrikelnummer und die Gruppen.
</p>
<?php
if (!empty($_POST["upload"]) and $_POST["upload"] === "upload") {
$pfach = $_POST["fach"];
$psemester = $_POST["semester"];
$newstudents = [];
$newgroups = [];
} else {
$pfach = empty($_SESSION["fach"]) ? "" :$_SESSION["fach"];
$psemester = empty($_SESSION["semester"]) ? "" :$_SESSION["semester"];
$newstudents = empty($_SESSION["newstudents"]) ? [] :$_SESSION["newstudents"];
$newgroups = empty($_SESSION["newgroups"]) ? [] :$_SESSION["newgroups"];
}
unset($_SESSION["newstudents"]);
unset($_SESSION["newgroups"]);
unset($_SESSION["fach"]);
unset($_SESSION["semester"]);
// Check if student is in any group. If the student is found
// return the first groupname, otherwise FALSE
function is_student_in_any_group($matrikelnummer, $grouplist) {
if (empty($grouplist) or empty($matrikelnummer)) {
return FALSE;
}
foreach ($grouplist as $gname => $teilnehmerliste) {
if (in_array($matrikelnummer, $teilnehmerliste)) {
return $gname;
}
}
}
function parseuserfile($fname) {
global $pfach,$psemester,$newstudents,$newgroups,$students,$groups;
if (($fh = fopen($fname, "r")) !== FALSE) {
while (($line = fgetcsv($fh, 1000, ",", "\"", ""))) {
$vorname = $line[0];
$nachname = $line[1];
$matrikelnummer = is_numeric($line[2]) ? $line[2] : "";
$student = array (
"vorname" => $vorname,
"nachname" => $nachname,
"noten" => array (
$pfach => []
)
);
$newgruppe = "";
if (!empty($line[4])) {
$gruppen = str_getcsv($line[4],",","\"","");
foreach ($gruppen as $gruppe) {
if (preg_match("/.*-G[0-9].*/u", $gruppe) or
preg_match("/G[0-9].*/u", $gruppe) ) {
$newgruppe = trim($gruppe);
}
}
}
if (empty($newgruppe) or empty($matrikelnummer)) {
echo "<p>WARNING: $vorname $nachname has no group or no matrikelnummer.</p>";
} elseif (!empty($groups[$psemester][$pfach]) and
$gname = is_student_in_any_group($matrikelnummer, $groups[$psemester][$pfach])) {
echo "<p>WARNING: $matrikelnummer is already in $gname in database.</p>";
} elseif ($gname = is_student_in_any_group($matrikelnummer, $newgroups)) {
echo "<p>WARNING: $matrikelnummer is already in $gname in this file</p>";
} else {
if (empty($students[$matrikelnummer])) {
//db_student_new($matrikelnummer,$student);
echo "<p>Adding student $matrikelnummer</p>";
$newstudents[$matrikelnummer] = $student;
} elseif (!array_key_exists($pfach,$students[$matrikelnummer]["noten"])) {
echo "<p>Adding $pfach to student $matrikelnummer</p>";
$newstudents[$matrikelnummer] = $student;
} else {
echo "<p>WARNING: student $matrikelnummer is already in database.</p>";
}
if (empty($groups[$psemester][$pfach][$newgruppe])) {
if (empty($newgroups[$newgruppe])) {
$newgroups[$newgruppe] = [$matrikelnummer];
} elseif (!in_array($matrikelnummer,$newgroups[$newgruppe])) {
$newgroups[$newgruppe][] = $matrikelnummer;
} else {
echo "<p>WARNING: student $matrikelnummer is already in group $newgruppe</p>";
}
} elseif (!in_array($matrikelnummer,$groups[$psemester][$pfach][$newgruppe])) {
echo "<p>ERROR: TODO group $newgruppe without $matrikelnummer already in database but </p>";
} else {
echo "<p>WARNING: group $newgruppe with $matrikelnummer already in database</p>";
}
}
//echo "<p>",$vorname,$nachname,$matrikelnummer,$newgruppe,"</p>";
}
ksort($newgroups);
$_SESSION["newstudents"] = $newstudents;
$_SESSION["newgroups"] = $newgroups;
$_SESSION["fach"] = $pfach;
$_SESSION["semester"] = $psemester;
} else {
echo "<p>Error: Could not open file</p>";
return FALSE;
}
return;
}
echo "<form action=\"admin-addusers.php\" method=\"post\" enctype=\"multipart/form-data\">";
echo "<label for \"fach\">Fach: </label>";
echo "<select name=\"fach\">";
foreach ($pfp as $fach => $value) {
echo "<option value=\"$fach\">$fach</option>";
}
echo "</select>";
echo "<select name=\"semester\">";
foreach ($semester as $semestername) {
echo "<option value=\"$semestername\">$semestername</option>";
}
echo "</select>";
echo "<input type=\"file\" name=\"csvfile\" id=\"csvfile\">";
echo "<input type=\"submit\" name=\"upload\" value=\"upload\">";
if (!empty($_POST["save"]) and $_POST["save"] === "save") {
foreach ($newstudents as $matrikelnummer => $student) {
if (empty($students[$matrikelnummer])) {
db_student_new($matrikelnummer,$student);
} elseif (empty($students[$matrikelnummer]["noten"][$pfach])) {
db_student_add_fach($matrikelnummer,$pfach);
} else {
echo "<p>ERROR: $matrikelnummer with $pfach already in database.</p>";
}
}
foreach ($newgroups as $gname => $teilnehmerarray) {
db_group_new($psemester,$pfach,$gname,$teilnehmerarray);
}
$newstudents = [];
$newgroups = [];
echo "<h1>Saved.</h1>";
} elseif (!empty($_POST["cancel"]) and $_POST["cancel"] === "cancel") {
$newstudents = [];
$newgroups = [];
echo "<h1>Canceled.</h1>";
} elseif (!empty($_POST["upload"]) and $_POST["upload"] === "upload") {
$fname = $_FILES["csvfile"]["tmp_name"];
$ftype = $_FILES["csvfile"]["type"];
if (!empty($fname)) {
if ($ftype !== "text/csv") {
echo "<p>ERROR: Filetype must be csv</p>";
} else {
parseuserfile($fname);
}
}
}
if (!empty($newstudents) or !empty($newgroups)) {
echo "<table>";
echo "<tr>";
echo "<th>Semester</th>";
echo "<th>Prüfung</th>";
echo "<th>Gruppe</th>";
echo "<th>Nachname</th>";
echo "<th>Vorname</th>";
echo "</tr>";
foreach ($newgroups as $gname => $teilnehmera) {
foreach ($teilnehmera as $matrikelnummer) {
if (!empty($newstudents[$matrikelnummer])) {
$vorname = $newstudents[$matrikelnummer]["vorname"];
$nachname = $newstudents[$matrikelnummer]["nachname"];
} else {
$vorname = $students[$matrikelnummer]["vorname"];
$nachname = $students[$matrikelnummer]["nachname"];
}
echo "<tr>";
echo "<td>",$psemester,"</td>";
echo "<td>",$pfach,"</td>";
echo "<td>",$gname,"</td>";
echo "<td>",$nachname,"</td>";
echo "<td>",$vorname,"</td>";
echo "</tr>";
}
}
echo "</table>";
echo "<input type=\"submit\" name=\"save\" value=\"save\">";
echo "<input type=\"submit\" name=\"cancel\" value=\"cancel\">";
}
echo "</form>";
?>
</body>
</html>
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