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1 | <?php |
2 | /* |
3 | * Copyright (C) 2003-2004 Polytechnique.org |
4 | * http://opensource.polytechnique.org/ |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | |
21 | |
22 | /** class for describing flags |
23 | */ |
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24 | class Flagset |
25 | { |
26 | /** string that holds the flagset */ |
27 | private $value; |
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28 | |
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29 | /** the boundary between flags */ |
30 | private $sep = ","; |
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31 | |
32 | |
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33 | /** set flag |
34 | * @param $flags services FROM coupures |
35 | * @return VOID |
36 | */ |
37 | public function __construct($flags = "") |
38 | { |
39 | $this->value = $flags; |
40 | } |
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41 | |
42 | |
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43 | /** add flag |
44 | * @param $flag XXX |
45 | * @return VOID |
46 | */ |
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47 | public function addFlag($flag) |
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48 | { |
49 | if (!$flag) return; |
50 | if (!$this->hasflag($flag)) { |
51 | if ($this->value) |
52 | $this->value .= $this->sep; |
53 | $this->value .= $flag; |
54 | } |
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55 | } |
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56 | |
57 | |
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58 | /** test si flag ou pas |
59 | * @param $flag XXX |
60 | * @return 1 || 0 |
61 | */ |
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62 | public function hasFlag($flag) |
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63 | { |
64 | $tok = strtok($this->value,$this->sep); |
65 | while ($tok) { |
66 | if ($tok==$flag) return 1; |
67 | $tok = strtok($this->sep); |
68 | } |
69 | return 0; |
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70 | } |
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71 | |
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72 | /** test flag combination |
73 | */ |
74 | public function hasFlagCombination($flag) |
75 | { |
76 | $perms = explode(',', $flag); |
77 | foreach ($perms as $perm) |
78 | { |
79 | $ok = true; |
80 | $rights = explode(':', $perm); |
81 | foreach ($rights as $right) { |
82 | if (($right{0} == '!' && $this->hasFlag(substr($right, 1))) || !$this->hasFlag($right)) { |
83 | $ok = false; |
84 | } |
85 | } |
86 | if ($ok) { |
87 | return true; |
88 | } |
89 | } |
90 | return false; |
91 | } |
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92 | |
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93 | /** remove flag |
94 | * @param $flag XXX |
95 | * @return VOID |
96 | */ |
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97 | public function rmFlag($flag) |
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98 | { |
99 | if (!$flag) return; |
100 | $newvalue = ""; |
101 | $tok = strtok($this->value,$this->sep); |
102 | while ($tok) { |
103 | if ($tok!=$flag) { |
104 | if ($newvalue) |
105 | $newvalue .= $this->sep; |
106 | $newvalue .= $tok; |
107 | } |
108 | $tok = strtok($this->sep); |
109 | } |
110 | $this->value=$newvalue; |
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111 | } |
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112 | |
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113 | /** return the flagset |
114 | */ |
115 | public function flags() |
116 | { |
117 | return $this->value; |
118 | } |
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119 | } |
120 | |
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121 | // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: |
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122 | ?> |