*** empty log message ***

git-svn-id: http://piwigo.org/svn/trunk@21 68402e56-0260-453c-a942-63ccdbb3a9ee

1 files changed, 104 insertions, 0 deletions

diff --git a/include/functions_group.inc.php b/include/functions_group.inc.php
new file mode 100644
index 000000000..f8987ab29
--- /dev/null
+++ b/include/functions_group.inc.php
@@ -0,0 +1,104 @@
+<?php
+/***************************************************************************
+ *                           functions_group.inc.php                       *
+ *                            --------------------                         *
+ *   application          : PhpWebGallery 1.3                              *
+ *   author               : Pierrick LE GALL <pierrick@z0rglub.com>        *
+ *                                                                         *
+ ***************************************************************************
+
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation;                                         *
+ *                                                                         *
+ ***************************************************************************/
+
+// get_group_restrictions returns an array containing all unaccessible
+// category ids.
+function get_group_restrictions( $group_id )
+{
+  // 1. retrieving ids of private categories
+  $query = 'SELECT id';
+  $query.= ' FROM '.PREFIX_TABLE.'categories';
+  $query.= " WHERE status = 'private'";
+  $query.= ';';
+  $result = mysql_query( $query );
+  $privates = array();
+  while ( $row = mysql_fetch_array( $result ) )
+  {
+    array_push( $privates, $row['id'] );
+  }
+  // 2. retrieving all authorized categories for the group
+  $authorized = array();
+  $query = 'SELECT cat_id';
+  $query.= ' FROM '.PREFIX_TABLE.'group_access';
+  $query.= ' WHERE group_id = '.$group_id;
+  $query.= ';';
+  $result = mysql_query( $query );
+  while ( $row = mysql_fetch_array( $result ) )
+  {
+    array_push( $authorized, $row['cat_id'] );
+  }
+
+  $forbidden = array();
+  foreach ( $privates as $private ) {
+    if ( !in_array( $private, $authorized ) )
+    {
+      array_push( $forbidden, $private );
+    }
+  }
+
+  return $forbidden;
+}
+
+// get_all_group_restrictions returns an array with ALL unaccessible
+// category ids, including sub-categories
+function get_all_group_restrictions( $group_id )
+{
+  $restricted_cats = get_group_restrictions( $group_id );
+  foreach ( $restricted_cats as $restricted_cat ) {
+    $sub_restricted_cats = get_subcats_id( $restricted_cat );
+    foreach ( $sub_restricted_cats as $sub_restricted_cat ) {
+      array_push( $restricted_cats, $sub_restricted_cat );
+    }
+  }
+  return $restricted_cats;
+}
+
+// The function is_group_allowed returns :
+//      - 0 : if the category is allowed with this $restrictions array
+//      - 1 : if this category is not allowed
+//      - 2 : if an uppercat category is not allowed
+function is_group_allowed( $category_id, $restrictions )
+{
+  $lowest_category_id = $category_id;
+                
+  $is_root = false;
+  while ( !$is_root and !in_array( $category_id, $restrictions ) )
+  {
+    $query = 'SELECT id_uppercat';
+    $query.= ' FROM '.PREFIX_TABLE.'categories';
+    $query.= ' WHERE id = '.$category_id;
+    $query.= ';';
+    $row = mysql_fetch_array( mysql_query( $query ) );
+    if ( $row['id_uppercat'] == '' )
+    {
+      $is_root = true;
+    }
+    $category_id = $row['id_uppercat'];
+  }
+                
+  if ( in_array( $lowest_category_id, $restrictions ) )
+  {
+    return 1;
+  }
+  if ( in_array( $category_id, $restrictions ) )
+  {
+    return 2;
+  }
+  // this group is allowed to go in this category
+  return 0;
+}
+?>
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