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<?php
// $Id$
/**
* Complex filter to handle filtering for many to one relationships,
* such as terms (many terms per node) or roles (many roles per user).
*
* The construct method needs to be overridden to provide a list of options;
* alternately, the value_form and admin_summary methods need to be overriden
* to provide something that isn't just a select list.
*/
class views_handler_filter_many_to_one extends views_handler_filter_in_operator {
function init(&$view, &$options) {
parent::init($view, $options);
$this->helper = new views_many_to_one_helper($this);
}
function option_definition() {
$options = parent::option_definition();
$options['operator']['default'] = 'or';
$options['value']['default'] = array();
return $options;
}
function operators() {
$operators = array(
'or' => array(
'title' => t('Is one of'),
'short' => t('or'),
'short_single' => t('='),
'method' => 'op_helper',
'values' => 1,
'ensure_my_table' => 'helper',
),
'and' => array(
'title' => t('Is all of'),
'short' => t('and'),
'short_single' => t('='),
'method' => 'op_helper',
'values' => 1,
'ensure_my_table' => 'helper',
),
'not' => array(
'title' => t('Is none of'),
'short' => t('not'),
'short_single' => t('<>'),
'method' => 'op_helper',
'values' => 1,
'ensure_my_table' => 'helper',
),
);
// if the definition allows for the empty operator, add it.
if (!empty($this->definition['allow empty'])) {
$operators += array(
'empty' => array(
'title' => t('Is empty (NULL)'),
'method' => 'op_empty',
'short' => t('empty'),
'values' => 0,
),
'not empty' => array(
'title' => t('Is not empty (NULL)'),
'method' => 'op_empty',
'short' => t('not empty'),
'values' => 0,
),
);
}
return $operators;
}
var $value_form_type = 'select';
function value_form(&$form, &$form_state) {
parent::value_form($form, $form_state);
if (empty($form_state['exposed'])) {
$this->helper->options_form($form, $form_state);
}
}
/**
* Override ensure_my_table so we can control how this joins in.
* The operator actually has influence over joining.
*/
function ensure_my_table() {
// Defer to helper if the operator specifies it.
$info = $this->operators();
if (isset($info[$this->operator]['ensure_my_table']) && $info[$this->operator]['ensure_my_table'] == 'helper') {
return $this->helper->ensure_my_table();
}
return parent::ensure_my_table();
}
function op_helper() {
if (empty($this->value)) {
return;
}
$this->helper->add_filter();
}
}