classes/plflagset.php

   1 <?php
   2 /*
   3  * Copyright (C) 2003-2008 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  */
  24 class PlFlagSet
  25 {
  26     /** string that holds the PlFlagSet */
  27     private $values = array();
  28
  29     /** the boundary between flags */
  30     private $sep;
  31
  32
  33     /** set flag
  34      * @param $flags services FROM coupures
  35      * @return VOID
  36      */
  37     public function __construct($flags = '', $sep = ',')
  38     {
  39         $this->sep = $sep;
  40         $splitted = explode($sep, $flags);
  41         foreach ($splitted as $part) {
  42             $this->values[$part] = true;
  43         }
  44     }
  45
  46
  47     /** add flag
  48      * @param $flag XXX
  49      * @return VOID
  50      */
  51     public function addFlag($flag)
  52     {
  53         if (empty($flag)) {
  54             return;
  55         }
  56         $this->values[$flag] = true;
  57     }
  58
  59
  60     /** test si flag ou pas
  61      * @param $flag XXX
  62      * @return 1 || 0
  63      */
  64     public function hasFlag($flag)
  65     {
  66         return !empty($flag) && isset($this->values[$flag]) && $this->values[$flag];
  67     }
  68
  69     /** test flag combination
  70      */
  71     public function hasFlagCombination($flag)
  72     {
  73         $perms = explode(',', $flag);
  74         foreach ($perms as $perm)
  75         {
  76             $ok = true;
  77             $rights = explode(':', $perm);
  78             foreach ($rights as $right) {
  79                 if (($right{0} == '!' && $this->hasFlag(substr($right, 1))) || !$this->hasFlag($right)) {
  80                     $ok = false;
  81                 }
  82             }
  83             if ($ok) {
  84                 return true;
  85             }
  86         }
  87         return false;
  88     }
  89
  90     /** remove flag
  91      * @param $flag XXX
  92      * @return VOID
  93      */
  94     public function rmFlag($flag)
  95     {
  96         if (empty($flag)) {
  97             return;
  98         }
  99         if (isset($this->values[$flag])) {
 100             unset($this->values[$flag]);
 101         }
 102     }
 103
 104
 105     /** return the PlFlagSet
 106      */
 107     public function flags()
 108     {
 109         $flags = '';
 110         foreach ($this->values as $key=>$value) {
 111             if (!empty($flags)) {
 112                 $flags .= $this->sep;
 113             }
 114             if ($value) {
 115                 $flags .= $key;
 116             }
 117         }
 118         return $flags;
 119     }
 120 }
 121
 122 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 123 ?>