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