views_handler_filter_term_node_tid_depth_join.inc
Definition of views_handler_filter_term_node_tid_depth_join.
File
-
modules/
taxonomy/ views_handler_filter_term_node_tid_depth_join.inc
View source
<?php
/**
* @file
* Definition of views_handler_filter_term_node_tid_depth_join.
*/
/**
* Filter handler for taxonomy terms with depth.
*
* This handler is actually part of the node table and has some restrictions,
* because it uses a subquery to find nodes with.
*
* @ingroup views_filter_handlers
*/
class views_handler_filter_term_node_tid_depth_join extends views_handler_filter_term_node_tid {
/**
* {@inheritdoc}
*/
public function operator_options($which = 'title') {
return array(
'or' => t('Is one of'),
);
}
/**
* {@inheritdoc}
*/
public function option_definition() {
$options = parent::option_definition();
$options['depth'] = array(
'default' => 0,
);
return $options;
}
/**
* {@inheritdoc}
*/
public function extra_options_form(&$form, &$form_state) {
parent::extra_options_form($form, $form_state);
$form['depth'] = array(
'#type' => 'weight',
'#title' => t('Depth'),
'#default_value' => $this->options['depth'],
'#description' => t('The depth will match nodes tagged with terms in the hierarchy. For example, if you have the term "fruit" and a child term "apple", with a depth of 1 (or higher) then filtering for the term "fruit" will get nodes that are tagged with "apple" as well as "fruit". If negative, the reverse is true; searching for "apple" will also pick up nodes tagged with "fruit" if depth is -1 (or lower).'),
);
}
/**
* {@inheritdoc}
*/
public function query() {
// If no filter values are present, then do nothing.
if (count($this->value) == 0) {
return;
}
elseif (count($this->value) == 1) {
// Somethis $this->value is an array with a single element so convert it.
if (is_array($this->value)) {
$this->value = current($this->value);
}
$operator = '=';
}
else {
$operator = 'IN';
// " IN ("
// . implode(', ', array_fill(0, sizeof($this->value), '%d'))
// . ")";
}
// The normal use of ensure_my_table() here breaks Views.
// So instead we trick the filter into using the alias of the base table.
// See http://drupal.org/node/271833
// If a relationship is set, we must use the alias it provides.
if (!empty($this->relationship)) {
$this->table_alias = $this->relationship;
}
elseif (isset($this->query->table_queue[$this->query->base_table]['alias'])) {
$this->table_alias = $this->query->table_queue[$this->query->base_table]['alias'];
}
else {
return;
}
// The tids variable can be an integer or an array of integers.
$tids = is_array($this->value) ? $this->value : array(
$this->value,
);
if ($this->options['depth'] > 0) {
// When the depth is positive search the children.
foreach ($tids as $tid) {
// The term must be loaded to get vid for use in taxonomy_get_tree().
if ($term = taxonomy_term_load($tid)) {
// For every tid argument find all the children down to the depth set
// in the options and save the tids for the condition.
$tree = taxonomy_get_tree($term->vid, $term->tid, (int) $this->options['depth']);
$tids = array_merge($tids, array_map('_taxonomy_get_tid_from_term', $tree));
}
}
}
elseif ($this->options['depth'] < 0) {
// When the depth is negative search the parents.
foreach ($tids as $tid) {
// For every tid argument find all the parents up to the depth set
// in the options and add the tids into the array. Since there is
// no taxonomy function to get all parents with a depth limit it
// is done here building a multidimensional array.
if ($term = taxonomy_term_load($tid)) {
// A variable is needed to track the current depth level.
$n = 0;
// Initialise our depth based parents array with the leaf term.
$parents[$n--][] = $term;
while ($n >= $this->options['depth']) {
// At each depth find the parents of the current terms.
// It is important to note that it is possible for a term to have
// multiple parents so get the parents of every parent and so on.
$parents[$n] = array();
foreach ($parents[$n + 1] as $term) {
$parents[$n] += taxonomy_get_parents($term->tid);
}
// Save all the tids for the condition.
$tids = array_merge($tids, array_map('_taxonomy_get_tid_from_term', $parents[$n]));
$n--;
}
}
}
}
// Check the size of the array and set the operator accordingly.
if (count($tids) > 1) {
$operator = 'IN';
}
else {
$tids = current($tids);
$operator = '=';
}
// Join on taxonomy index table.
$join = new views_join();
$join->table = 'taxonomy_index';
$join->field = 'nid';
$join->left_table = $this->table_alias;
$join->left_field = $this->real_field;
$join->type = 'INNER';
$join->extra = array(
array(
'field' => 'tid',
'value' => $tids,
'operator' => $operator,
),
);
}
}
Classes
Title | Deprecated | Summary |
---|---|---|
views_handler_filter_term_node_tid_depth_join | Filter handler for taxonomy terms with depth. |