1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
<?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();
$ret = Database::simpleQuery(
'SELECT l.locationid, l.locationname, lr.managerip, lr.tutoruuid, m.clientip as tutorip '
.'FROM location l '
.'INNER JOIN location_roomplan lr ON (l.locationid = lr.locationid)'
.'LEFT JOIN machine m ON (lr.tutoruuid = m.machineuuid)');
while ($row = $ret->fetch(PDO::FETCH_ASSOC)) {
if (Location::isLeaf($row['locationid'])) { // TODO: This creates extra queries, optimize?
$row['locationname'] = str_replace(',', ';', $row['locationname']); // comma probably not the best sep here
$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]);
}
}
}
|
