Method saveorder

/**
 * Saves the manually set order of records.
 *
 * @param   array    $pks    An array of primary key ids.
 * @param   integer  $order  +1 or -1
 *
 * @return  boolean  Boolean true on success, false on failure
 *
 * @since   1.6
 */
public function saveorder($pks = array(), $order = null)
{
    // Initialize re-usable member properties
    $this->initBatch();
    $conditions = array();
    if (empty($pks)) {
        Factory::getApplication()->enqueueMessage(Text::_($this->text_prefix . '_ERROR_NO_ITEMS_SELECTED'), 'error');
        return false;
    }
    $orderingField = $this->table->getColumnAlias('ordering');
    // Update ordering values
    foreach ($pks as $i => $pk) {
        $this->table->load((int) $pk);
        // We don't want to modify tags on reorder, not removing the tagsHelper removes all associated tags
        if ($this->table instanceof TaggableTableInterface) {
            $this->table->clearTagsHelper();
        }
        // Access checks.
        if (!$this->canEditState($this->table)) {
            // Prune items that you can't change.
            unset($pks[$i]);
            Log::add(Text::_('JLIB_APPLICATION_ERROR_EDITSTATE_NOT_PERMITTED'), Log::WARNING, 'jerror');
        } elseif ($this->table->{$orderingField} != $order[$i]) {
            $this->table->{$orderingField} = $order[$i];
            if (!$this->table->store()) {
                $this->setError($this->table->getError());
                return false;
            }
            // Remember to reorder within position and client_id
            $condition = $this->getReorderConditions($this->table);
            $found = false;
            foreach ($conditions as $cond) {
                if ($cond[1] == $condition) {
                    $found = true;
                    break;
                }
            }
            if (!$found) {
                $key = $this->table->getKeyName();
                $conditions[] = array($this->table->{$key}, $condition);
            }
        }
    }
    // Execute reorder for each category.
    foreach ($conditions as $cond) {
        $this->table->load($cond[0]);
        $this->table->reorder($cond[1]);
    }
    // Clear the component's cache
    $this->cleanCache();
    return true;
}