Added a pvs.ini file generator.

1 files changed, 154 insertions, 0 deletions

diff --git a/modules-available/roomplanner/inc/pvsgenerator.inc.php b/modules-available/roomplanner/inc/pvsgenerator.inc.php
new file mode 100644
index 00000000..21ee199b
--- /dev/null
+++ b/modules-available/roomplanner/inc/pvsgenerator.inc.php
@@ -0,0 +1,154 @@
+<?php
+
+define('X', 0);
+define('Y', 1);
+
+class PvsGenerator
+{
+
+    public static function generate()
+    {
+
+        if (!Module::isAvailable('locations')) {
+           die('sorry, but the locations module is required');
+        }
+
+
+
+        /* get all rooms */
+        $rooms = array();
+        $ret = Database::simpleQuery(
+                'SELECT l.locationid, l.locationname, l.managerip, l.tutoruuid, m.clientip as tutorip '
+                .'FROM location l LEFT JOIN machine m on l.tutoruuid = m.machineuuid', []);
+        while ($row = $ret->fetch(PDO::FETCH_ASSOC)) {
+            if (Location::isLeaf($row['locationid'])) {
+                $rooms[] = $row;
+            }
+        }
+        /* collect names */
+        $roomNames = array();
+
+        foreach($rooms as $room) {
+            $roomNames[] = $room['locationname'];
+        }
+
+        /* add [General]-block */
+        $config  = "[General]\n";
+        $config .= 'rooms=' . implode(', ', $roomNames) . "\n";
+        $config .= "allowClientQuit=True\n"; // TODO: remove this
+        $config .= "showLockDesktopButton=True\n"; // TODO: Make this configurable (or not)
+        $config .= "\n\n";
+
+        /* foreach room generate room-block */
+        foreach($rooms as $room) {
+            $config .= PvsGenerator::generateRoomBlock($room);
+            $config .= "\n";
+        }
+
+        return $config;
+    }
+
+    private static function generateRoomBlock($room)
+    {
+        $out = '[' . $room['locationname'] . "]\n";
+
+
+        /* find all clients in that room */
+        $machines = PvsGenerator::getMachines($room['locationid']);
+        /* manager */
+        $mgr = $room['managerip'];
+        $tutor = $room['tutorip'];
+        if ($mgr) {
+            $out .= 'mgrIP=' . $mgr . "\n";
+        }
+        /* tutor */
+        if ($tutor) {
+            $out .= 'tutorIP' . $tutor . "\n";
+        }
+
+        /* grid */
+        $out .= PvsGenerator::generateGrid($machines);
+
+        return $out;
+    }
+
+    private static function generateGrid($machines)
+    {
+        $out = "";
+
+        /* this is a virtual grid, we first need this to do some optimizations */
+        $grid = array();
+        /* add each contained client with position and ip */
+        foreach ($machines as $machine) {
+            $grid[$machine['clientip']] = [$machine['gridCol'], $machine['gridRow']];
+        }
+        /* find bounding box */
+        PvsGenerator::boundingBox($grid, $minX, $minY, $maxX, $maxY);
+        $clientSizeX = 4; /* TODO: optimize */
+        $clientSizeY = 4; /* TODO: optimize */
+        $sizeX = max($maxX - $minX + $clientSizeX, 1); /* never negative */
+        $sizeY = max($maxY - $minY + $clientSizeY, 1); /* and != 0 to avoid divide-by-zero in pvsmgr */
+
+        /* zoom all clients into bounding box */
+        foreach ($grid as $ip => $pos) {
+            $newX = $grid[$ip][X] - $minX;
+            $newY = $grid[$ip][Y] - $minY;
+            $grid[$ip] =  [$newX, $newY];
+        }
+
+        $out .= "gridSize=@Size($sizeX $sizeY)\n";
+        $out .= "clientSize=@Size($clientSizeX $clientSizeY)\n";
+        $out .= "client\\size=" . count($grid) . "\n";
+
+        $i = 1;
+        foreach ($grid as $ip => $pos) {
+            $out .= "client\\" . $i   . "\\ip=$ip\n";
+            $out .= "client\\" . $i++ . "\\pos=@Point(" . $pos[X] . ' ' . $pos[Y] . ")\n";
+        }
+
+        return $out;
+
+    }
+
+
+
+    private static function getMachines($roomid) {
+        $ret = Database::simpleQuery(
+            'SELECT clientip, position FROM machine WHERE locationid = :locationid',
+            ['locationid' => $roomid]);
+
+        $machines = array();
+
+		while ($row = $ret->fetch(PDO::FETCH_ASSOC)) {
+            $position = json_decode($row['position'], true);
+
+            $machine = array();
+            $machine['clientip'] = $row['clientip'];
+            $machine['gridRow'] = $position['gridRow'];
+            $machine['gridCol'] = $position['gridCol'];
+            $machine['tutor'] = false; /* TODO: find out if machine is default tutor */
+            $machine['manager'] = false; /* TODO: find out if machine is manager */
+
+            $machines[] = $machine;
+        }
+
+        return $machines;
+
+    }
+
+    private static function boundingBox($grid, &$minX, &$minY, &$maxX, &$maxY ) {
+        $minX =  PHP_INT_MAX; /* PHP_INT_MIN is only avaiable since PHP 7 */
+        $maxX = ~PHP_INT_MAX;
+        $minY =  PHP_INT_MAX;
+        $maxY = ~PHP_INT_MAX;
+
+        foreach ($grid as $pos) {
+            $minX = min($minX, $pos[X]);
+            $maxX = max($maxX, $pos[X]);
+            $minY = min($minY, $pos[Y]);
+            $maxY = max($maxY, $pos[Y]);
+        }
+    }
+
+}
+