views_handler_filter_term_node_tid_depth.inc in Views (for Drupal 7) 6.3
File
modules/taxonomy/views_handler_filter_term_node_tid_depth.inc
View source
<?php
class views_handler_filter_term_node_tid_depth extends views_handler_filter_term_node_tid {
function operator_options() {
return array(
'or' => t('Is one of'),
);
}
function option_definition() {
$options = parent::option_definition();
$options['depth'] = array(
'default' => 0,
);
return $options;
}
function extra_options_form(&$form, &$form_state) {
parent::extra_options_form($form, $form_state);
$form['depth'] = array(
'#type' => 'weight',
'#title' => t('Depth'),
'#default_value' => $this->options['depth'],
'#description' => t('The depth will match nodes tagged with terms in the hierarchy. For example, if you have the term "fruit" and a child term "apple", with a depth of 1 (or higher) then filtering for the term "fruit" will get nodes that are tagged with "apple" as well as "fruit". If negative, the reverse is true; searching for "apple" will also pick up nodes tagged with "fruit" if depth is -1 (or lower).'),
);
}
function query() {
if (count($this->value) == 0) {
return;
}
else {
if (count($this->value) == 1) {
$placeholder = " = %d";
}
else {
$placeholder = " IN (" . implode(', ', array_fill(0, sizeof($this->value), '%d')) . ")";
}
}
if (!empty($this->relationship)) {
$this->table_alias = $this->relationship;
}
else {
if (isset($this->query->table_queue[$this->query->base_table]['alias'])) {
$this->table_alias = $this->query->table_queue[$this->query->base_table]['alias'];
}
else {
return;
}
}
$subquery = "\n SELECT tn.vid FROM {term_node} tn\n";
$where = " WHERE tn.tid {$placeholder}\n";
$args = $this->value;
$last = "tn";
if ($this->options['depth'] > 0) {
$subquery .= " LEFT JOIN {term_hierarchy} th ON th.tid = tn.tid\n";
$last = "th";
foreach (range(1, abs($this->options['depth'])) as $count) {
$subquery .= " LEFT JOIN {term_hierarchy} th{$count} ON {$last}.parent = th{$count}.tid\n";
$where .= " OR th{$count}.tid {$placeholder}\n";
$args = array_merge($args, $this->value);
$last = "th{$count}";
}
}
else {
if ($this->options['depth'] < 0) {
foreach (range(1, abs($this->options['depth'])) as $count) {
$subquery .= " LEFT JOIN {term_hierarchy} th{$count} ON {$last}.tid = th{$count}.parent\n";
$where .= " OR th{$count}.tid {$placeholder}\n";
$args = array_merge($args, $this->value);
$last = "th{$count}";
}
}
}
$this->query
->add_where(0, "{$this->table_alias}.{$this->real_field} IN ({$subquery}{$where} )", $args);
}
}