Use numSubOrdindates inconjuction with VLV to count total

2 files changed, 12 insertions, 3 deletions

diff --git a/config/main.inc.php.dist b/config/main.inc.php.dist
index 7eac777e0..96997b40d 100644
--- a/config/main.inc.php.dist
+++ b/config/main.inc.php.dist
@@ -536,6 +536,7 @@ $rcmail_config['ldap_public']['Verisign'] = array(
   'filter'        => '(objectClass=inetOrgPerson)',      // used for basic listing (if not empty) and will be &'d with search queries. example: status=act
   'fuzzy_search'  => true,    // server allows wildcard search
   'vlv'           => false,   // Enable Virtual List View to mor efficiently fetch paginated data (if server supports it)
+  'numsub_filter' => '(objectClass=organizationalUnit)',   // with VLV, we also use numSubOrdinates to query the total number of records. Set this filter to get all numSubOrdinates attributes for counting
   'sizelimit'     => '0',     // Enables you to limit the count of entries fetched. Setting this to 0 means no limit.
   'timelimit'     => '0',     // Sets the number of seconds how long is spend on the search. Setting this to 0 means no limit.
 
diff --git a/program/include/rcube_ldap.php b/program/include/rcube_ldap.php
index e377de7fd..4ea4f6046 100644
--- a/program/include/rcube_ldap.php
+++ b/program/include/rcube_ldap.php
@@ -884,10 +884,18 @@ class rcube_ldap extends rcube_addressbook
 
             $this->_debug("C: Search [".$filter."]");
 
-            // when using VLV, we need to issue listing command first in order to get the full count
+            // when using VLV, we get the total count by...
             if (!$count && $function != 'ldap_read' && $this->prop['vlv']) {
-                if ($this->_exec_search(true))
-                    $this->vlv_count = ldap_count_entries($this->conn, $this->ldap_result);
+                // ...either reading numSubOrdinates attribute
+                if ($this->prop['numsub_filter'] && ($result_count = @$function($this->conn, $this->base_dn, $this->prop['numsub_filter'], array('numSubOrdinates'), 0, 0, 0))) {
+                    $counts = ldap_get_entries($this->conn, $result_count);
+                    for ($this->vlv_count = $j = 0; $j < $counts['count']; $j++)
+                        $this->vlv_count += $counts[$j]['numsubordinates'][0];
+                    $this->_debug("D: total numsubordinates = " . $this->vlv_count);
+                }
+                else  // ...or by fetching all records dn and count them
+                    $this->vlv_count = $this->_exec_search(true);
+                
                 $this->vlv_active = $this->_vlv_set_controls();
             }