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<?php
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/**
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* @file
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* Definition of views_handler_filter_search.
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*/
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/**
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* Field handler to provide simple renderer that allows linking to a node.
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*
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* @ingroup views_filter_handlers
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*/
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class views_handler_filter_search extends views_handler_filter {
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/**
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*
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*/
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public $always_multiple = TRUE;
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/**
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* Stores a viewsSearchQuery object to be able to use the search.module "api".
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*
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* @var viewsSearchQuery
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*/
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public $search_query = NULL;
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/**
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* Checks if the search query has been parsed.
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*/
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public $parsed = FALSE;
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/**
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* {@inheritdoc}
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*/
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public function option_definition() {
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$options = parent::option_definition();
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$options['operator']['default'] = 'optional';
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$options['remove_score'] = array('default' => FALSE, 'bool' => TRUE);
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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, $form_state);
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// Add an option to remove search scores from the query.
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$form['remove_score'] = array(
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'#type' => 'checkbox',
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'#title' => t('Remove search score'),
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'#description' => t('Check this box to remove the search score from the query. This can help reduce duplicate search results when using this filter.'),
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'#default_value' => $this->options['remove_score'],
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);
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}
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/**
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* Provide simple equality operator.
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*/
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public function operator_form(&$form, &$form_state) {
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$form['operator'] = array(
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'#type' => 'radios',
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'#title' => t('On empty input'),
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'#default_value' => $this->operator,
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'#options' => array(
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'optional' => t('Show All'),
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'required' => t('Show None'),
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),
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);
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}
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/**
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* Provide a simple textfield for equality.
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*/
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public function value_form(&$form, &$form_state) {
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$form['value'] = array(
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'#type' => 'textfield',
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'#size' => 15,
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'#default_value' => $this->value,
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'#attributes' => array('title' => t('Enter the terms you wish to search for.')),
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'#title' => empty($form_state['exposed']) ? t('Value') : '',
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);
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}
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/**
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* Validate the options form.
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*/
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public function exposed_validate(&$form, &$form_state) {
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if (!isset($this->options['expose']['identifier'])) {
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return;
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}
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$key = $this->options['expose']['identifier'];
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if (!empty($form_state['values'][$key])) {
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$this->query_parse_search_expression($form_state['values'][$key]);
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if (count($this->search_query->words()) == 0) {
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form_set_error($key, format_plural(variable_get('minimum_word_size', 3), 'You must include at least one positive keyword with 1 character or more.', 'You must include at least one positive keyword with @count characters or more.'));
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}
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}
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}
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/**
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* Make sure that parseSearchExpression is run and everything is set up.
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*
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* @param string $input
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* The search phrase which was input by the user.
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*/
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public function query_parse_search_expression($input) {
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if (!isset($this->search_query)) {
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$this->parsed = TRUE;
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$this->search_query = db_select('search_index', 'i', array('target' => 'slave'))->extend('viewsSearchQuery');
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$this->search_query->searchExpression($input, $this->view->base_table);
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$this->search_query->publicParseSearchExpression();
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}
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}
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/**
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* Add this filter to the query.
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*
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* Due to the nature of fapi, the value and the operator have an unintended
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* level of indirection. You will find them in $this->operator
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* and $this->value respectively.
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*/
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public function query() {
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// Since attachment views don't validate the exposed input, parse the search
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// expression if required.
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if (!$this->parsed) {
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$this->query_parse_search_expression($this->value);
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}
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$required = FALSE;
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if (!isset($this->search_query)) {
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$required = TRUE;
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}
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else {
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$words = $this->search_query->words();
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if (empty($words)) {
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$required = TRUE;
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}
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}
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if ($required) {
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if ($this->operator == 'required') {
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$this->query->add_where($this->options['group'], 'FALSE');
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}
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}
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else {
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$search_index = $this->ensure_my_table();
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$search_condition = db_and();
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if (!$this->options['remove_score']) {
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// Create a new join to relate the 'serach_total' table to our current
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// 'search_index' table.
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$join = new views_join();
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$join->construct('search_total', $search_index, 'word', 'word');
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$search_total = $this->query->add_relationship('search_total', $join, $search_index);
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$this->search_score = $this->query->add_field('', "$search_index.score * $search_total.count", 'score', array('aggregate' => TRUE, 'function' => 'sum'));
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}
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if (empty($this->query->relationships[$this->relationship])) {
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$base_table = $this->query->base_table;
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}
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else {
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$base_table = $this->query->relationships[$this->relationship]['base'];
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}
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$search_condition->condition("$search_index.type", $base_table);
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if (!$this->search_query->simple()) {
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$search_dataset = $this->query->add_table('search_dataset');
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$conditions = $this->search_query->conditions();
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$condition_conditions =& $conditions->conditions();
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foreach ($condition_conditions as $key => &$condition) {
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// Take sure we just look at real conditions.
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if (is_numeric($key)) {
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// Replace the conditions with the table alias of views.
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$this->search_query->condition_replace_string('d.', "$search_dataset.", $condition);
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}
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}
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$search_conditions =& $search_condition->conditions();
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$search_conditions = array_merge($search_conditions, $condition_conditions);
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}
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else {
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// Stores each condition, so and/or on the filter level will still work.
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$or = db_or();
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foreach ($words as $word) {
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$or->condition("$search_index.word", $word);
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}
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$search_condition->condition($or);
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}
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$this->query->add_where($this->options['group'], $search_condition);
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$this->query->add_groupby("$search_index.sid");
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$matches = $this->search_query->matches();
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$placeholder = $this->placeholder();
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$this->query->add_having_expression($this->options['group'], "COUNT(*) >= $placeholder", array($placeholder => $matches));
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}
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// Set to NULL to prevent PDO exception when views object is cached.
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$this->search_query = NULL;
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}
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}
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/**
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* Extends the core SearchQuery.
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*/
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class viewsSearchQuery extends SearchQuery {
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/**
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* {@inheritdoc}
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*/
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public function &conditions() {
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return $this->conditions;
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}
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/**
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* {@inheritdoc}
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*/
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public function words() {
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return $this->words;
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}
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/**
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* {@inheritdoc}
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*/
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public function simple() {
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return $this->simple;
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}
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/**
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* {@inheritdoc}
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*/
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public function matches() {
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return $this->matches;
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}
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/**
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* {@inheritdoc}
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*/
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public function publicParseSearchExpression() {
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return $this->parseSearchExpression();
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}
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/**
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* {@inheritdoc}
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*/
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public function condition_replace_string($search, $replace, &$condition) {
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if ($condition['field'] instanceof DatabaseCondition) {
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$conditions =& $condition['field']->conditions();
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foreach ($conditions as $key => &$subcondition) {
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if (is_numeric($key)) {
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$this->condition_replace_string($search, $replace, $subcondition);
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}
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}
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}
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else {
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$condition['field'] = str_replace($search, $replace, $condition['field']);
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}
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}
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}
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