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<?php
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/**
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* @file
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* Definition of views_handler_sort_menu_hierarchy.
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*/
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/**
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* Sort in menu hierarchy order.
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*
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* Given a field name of 'p' this produces an ORDER BY on p1, p2, ..., p9;
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* and optionally injects multiple joins to {menu_links} to sort by weight
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* and title as well.
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*
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* This is only really useful for the {menu_links} table.
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*
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* @ingroup views_sort_handlers
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*/
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class views_handler_sort_menu_hierarchy extends views_handler_sort {
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/**
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* {@inheritdoc}
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*/
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public function option_definition() {
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$options = parent::option_definition();
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$options['sort_within_level'] = array('default' => FALSE);
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return $options;
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}
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/**
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* {@inheritdoc}
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*/
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public function options_form(&$form, &$form_state) {
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parent::options_form($form, $form_state);
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$form['sort_within_level'] = array(
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'#type' => 'checkbox',
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'#title' => t('Sort within each hierarchy level'),
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'#description' => t('Enable this to sort the items within each level of the hierarchy by weight and title. Warning: this may produce a slow query.'),
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'#default_value' => $this->options['sort_within_level'],
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);
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}
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/**
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* {@inheritdoc}
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*/
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public function query() {
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$this->ensure_my_table();
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$max_depth = isset($this->definition['max depth']) ? $this->definition['max depth'] : MENU_MAX_DEPTH;
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for ($i = 1; $i <= $max_depth; ++$i) {
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if ($this->options['sort_within_level']) {
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$join = new views_join();
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$join->construct('menu_links', $this->table_alias, $this->field . $i, 'mlid');
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$menu_links = $this->query->add_table('menu_links', NULL, $join);
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$this->query->add_orderby($menu_links, 'weight', $this->options['order']);
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$this->query->add_orderby($menu_links, 'link_title', $this->options['order']);
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}
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// We need this even when also sorting by weight and title, to make sure
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// that children of two parents with the same weight and title are
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// correctly separated.
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$this->query->add_orderby($this->table_alias, $this->field . $i, $this->options['order']);
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}
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}
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}
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