admin/roles/allowoverride.php

   1 <?php
   2 /**
   3  * this page defines what roles can override (override roles in different context. For example,
   4  * we can say that Admin can override teacher roles in a course
   5  * To be able to override roles. If a user has moodle/role:override at context level
   6  * and be in the roles_allow_override table.
   7  */
   8     require_once('../../config.php');
   9     require_once($CFG->libdir.'/adminlib.php');
  10
  11     admin_externalpage_setup('defineroles');
  12
  13
  14     $sitecontext = get_context_instance(CONTEXT_SYSTEM, SITEID);
  15     require_capability('moodle/role:manage', $sitecontext);
  16
  17 /// form processiong here
  18
  19 /// get all roles
  20
  21     $roles = get_all_roles();
  22
  23     if ($grant = data_submitted()) {
  24
  25         foreach ($grant as $grole => $val) {
  26             if ($grole == 'dummy') {
  27                 continue;
  28             }
  29
  30             $string = explode('_', $grole);
  31             $temp[$string[1]][$string[2]] = 1; // if set, means can access
  32         }
  33
  34 // if current assignment is in data_submitted, ignore, else, write deny into db
  35         foreach ($roles as $srole) {
  36             foreach ($roles as $trole) {
  37                 if (isset($temp[$srole->id][$trole->id])) { // if set, need to write to db
  38                     if (!$record = get_record('role_allow_override', 'roleid', $srole->id, 'allowoverride', $trole->id)) {
  39                         allow_override($srole->id, $trole->id);
  40                     }
  41                 } else { //if set, means can access, attempt to remove it from db
  42                     delete_records('role_allow_override', 'roleid', $srole->id, 'allowoverride', $trole->id);
  43                 }
  44             }
  45         }
  46     }
  47 /// displaying form here
  48
  49     admin_externalpage_print_header();
  50
  51     $currenttab='allowoverride';
  52     require_once('managetabs.php');
  53
  54     $table->tablealign = 'center';
  55     $table->cellpadding = 5;
  56     $table->cellspacing = 0;
  57     $table->width = '90%';
  58     $table->align[] = 'right';
  59
  60 /// get all the roles identifier
  61     foreach ($roles as $role) {
  62         $rolesname[] = format_string($role->name);
  63         $roleids[] = $role->id;
  64         $table->align[] = 'center';
  65         $table->wrap[] = 'nowrap';
  66     }
  67
  68     $table->head = array_merge(array(''), $rolesname);
  69
  70     foreach ($roles as $role) {
  71         $beta = get_box_list($role->id, $roleids);
  72         $table->data[] = array_merge(array(format_string($role->name)), $beta);
  73     }
  74
  75     print_simple_box(get_string('configallowoverride', 'admin'), 'center');
  76
  77     echo '<form action="allowoverride.php" method="post">';
  78     print_table($table);
  79     echo '<div class="buttons"><input type="submit" value="'.get_string('savechanges').'"/>';
  80     echo '<input type="hidden" name="dummy" value="1" />'; // this is needed otherwise we do not know a form has been submitted
  81     echo '</div></form>';
  82
  83     admin_externalpage_print_footer();
  84
  85 // returns array
  86 function get_box_list($roleid, $arraylist){
  87
  88     foreach ($arraylist as $targetid) {
  89         if (get_record('role_allow_override', 'roleid', $roleid, 'allowoverride', $targetid)) {
  90             $array[] = '<input type="checkbox" name="s_'.$roleid.'_'.$targetid.'" value="1" checked="checked"/>';
  91         } else {
  92             $array[] = '<input type="checkbox" name="s_'.$roleid.'_'.$targetid.'" value="1" />';
  93         }
  94     }
  95     return $array;
  96 }
  97 ?>