includes/references.inc

   1 <?php
   2
   3 include_once($path_to_root . "/includes/db/references_db.inc");
   4
   5 class references
   6 {
   7
   8         function save($type, $id, $reference)
   9         {
  10                 add_reference($type, $id, $reference);
  11
  12                 references::save_last($reference, $type);
  13         }
  14
  15         function get($type, $id)
  16         {
  17                 return get_reference($type, $id);
  18         }
  19
  20         function delete($type, $id)
  21         {
  22                 delete_reference($type, $id);
  23         }
  24
  25         function exists($type, $reference)
  26         {
  27                 return (find_reference($type, $reference) != null);
  28         }
  29
  30         function save_last($reference, $type)
  31         {
  32                 $next = references::increment($reference);
  33                 save_next_reference($type, $next);
  34         }
  35
  36         function get_next($type)
  37         {
  38                 return get_next_reference($type);
  39         }
  40
  41         //------------------------------------
  42
  43         function is_valid($reference)
  44         {
  45                 return strlen(trim($reference)) > 0;
  46         }
  47
  48         function increment($reference)
  49         {
  50         if (is_numeric($reference))
  51                 return $reference + 1;
  52         else
  53                 return $reference;
  54         }
  55
  56         //------------------------------------
  57 }
  58
  59 //----------------------------------------------------------------------------
  60
  61 function is_new_reference($ref, $type)
  62 {
  63         $db_info = get_systype_db_info($type);
  64         $db_name = $db_info[0];
  65         $db_type = $db_info[1];
  66         $db_ref = $db_info[3];
  67
  68         if ($db_ref != null)
  69         {
  70                 $sql = "SELECT $db_ref FROM $db_name WHERE $db_ref='$ref'";
  71                 if ($db_type != null)
  72                         $sql .= " AND $db_type=$type";
  73
  74                 $result = db_query($sql, "could not test for unique reference");
  75
  76                 return (db_num_rows($result) == 0);
  77         }
  78
  79         // it's a type that doesn't use references - shouldn't be calling here, but say yes anyways
  80         return true;
  81 }
  82
  83 ?>