fixes #478, add new column user_infos.last_visit

This will speed up user edit popin opening, by avoiding to search in history for the last user visit.

The column user_infos.last_visit_from_history true/false says if the last_visit has already been search in history (to avoid making it twice). I could have implemented the search of last_visit for all users in the migration task 149 but in case of many users and long history, it would have taken years to execute...

include/functions.inc.php

@@ -411,6 +411,20 @@ function pwg_log($image_id = null, $image_type = null, $format_id = null)
 {
   global $conf, $user, $page;
 
+  $update_last_visit = true;
+  $update_last_visit = trigger_change('pwg_log_update_last_visit', $update_last_visit);
+
+  if ($update_last_visit)
+  {
+    $query = '
+UPDATE '.USER_INFOS_TABLE.'
+  SET last_visit = NOW(),
+      lastmodified = lastmodified
+  WHERE user_id = '.$user['id'].'
+';
+    pwg_query($query);
+  }
+
   $do_log = $conf['log'];
   if (is_admin())
   {

include/functions_user.inc.php

@@ -1614,4 +1614,46 @@ UPDATE '.USER_AUTH_KEYS_TABLE.'
 ;';
   pwg_query($query);
 }
+
+/**
+ * Gets the last visit (datetime) of a user, based on history table
+ *
+ * @since 2.9
+ * @param int $user_id
+ * @param boolean $save_in_user_infos to store result in user_infos.last_visit
+ * @return string date & time of last visit
+ */
+function get_user_last_visit_from_history($user_id, $save_in_user_infos=false)
+{
+  $last_visit = null;
+
+  $query = '
+SELECT
+    date,
+    time
+FROM '.HISTORY_TABLE.'
+  WHERE user_id = '.$user_id.'
+  ORDER BY id DESC
+  LIMIT 1
+;';
+  $result = pwg_query($query);
+  while ($row = pwg_db_fetch_assoc($result))
+  {
+    $last_visit = $row['date'].' '.$row['time'];
+  }
+
+  if ($save_in_user_infos)
+  {
+    $query = '
+UPDATE '.USER_INFOS_TABLE.'
+  SET last_visit = '.(is_null($last_visit) ? 'NULL' : "'".$last_visit."'").',
+      last_visit_from_history = \'true\',
+      lastmodified = lastmodified
+  WHERE user_id = '.$user_id.'
+';
+    pwg_query($query);
+  }
+
+  return $last_visit;
+}
 ?>

include/ws_functions/pwg.users.php

@@ -123,7 +123,8 @@ function ws_users_getList($params, &$service)
 
     $ui_fields = array(
       'status','level','language','theme','nb_image_page','recent_period','expand',
-      'show_nb_comments','show_nb_hits','enabled_high','registration_date'
+      'show_nb_comments','show_nb_hits','enabled_high','registration_date',
+      'last_visit'
       );
     foreach ($ui_fields as $field)
     {
@@ -154,6 +155,12 @@ SELECT DISTINCT ';
     $query.= '"" AS groups';
   }
 
+  if (isset($display['ui.last_visit']))
+  {
+    if (!$first) $query.= ', ';
+    $query.= 'ui.last_visit_from_history AS last_visit_from_history';
+  }
+
   $query.= '
   FROM '. USERS_TABLE .' AS u
     INNER JOIN '. USER_INFOS_TABLE .' AS ui
@@ -210,42 +217,25 @@ SELECT user_id, group_id
 
     if (isset($params['display']['last_visit']))
     {
-      $query = '
-SELECT
-    MAX(id) as history_id
-  FROM '.HISTORY_TABLE.'
-  WHERE user_id IN ('.implode(',', array_keys($users)).')
-  GROUP BY user_id
-;';
-      $history_ids = array_from_query($query, 'history_id');
-      
-      if (count($history_ids) == 0)
+      foreach ($users as $cur_user)
       {
-        $history_ids[] = -1;
-      }
-      
-      $query = '
-SELECT
-    user_id,
-    date,
-    time
-  FROM '.HISTORY_TABLE.'
-  WHERE id IN ('.implode(',', $history_ids).')
-;';
-      $result = pwg_query($query);
-      while ($row = pwg_db_fetch_assoc($result))
-      {
-        $last_visit = $row['date'].' '.$row['time'];
-        $users[ $row['user_id'] ]['last_visit'] = $last_visit;
-        
+        $last_visit = $cur_user['last_visit'];
+        $users[ $cur_user['id'] ]['last_visit'] = $last_visit;
+
+        if (!get_boolean($cur_user['last_visit_from_history']) and empty($last_visit))
+        {
+          $last_visit = get_user_last_visit_from_history($cur_user['id'], true);
+          $users[ $cur_user['id'] ]['last_visit'] = $last_visit;
+        }
+
         if (isset($params['display']['last_visit_string']))
         {
-          $users[ $row['user_id'] ]['last_visit_string'] = format_date($last_visit, array('day', 'month', 'year'));
+          $users[ $cur_user['id'] ]['last_visit_string'] = format_date($last_visit, array('day', 'month', 'year'));
         }
         
         if (isset($params['display']['last_visit_since']))
         {
-          $users[ $row['user_id'] ]['last_visit_since'] = time_since($last_visit, 'day');
+          $users[ $cur_user['id'] ]['last_visit_since'] = time_since($last_visit, 'day');
         }
       }
     }
@@ -632,4 +622,4 @@ SELECT
     ));
 }
 
-?>
+?>