Search.php

1. 8.x drupal/core/modules/search/lib/Drupal/search/Plugin/views/argument/Search.php
2. 8.x drupal/core/modules/search/lib/Drupal/search/Plugin/views/filter/Search.php

<?php

/**
 * @file
 * Definition of Drupal\search\Plugin\views\argument\Search.
 */
namespace Drupal\search\Plugin\views\argument;

use Drupal\views\Plugin\views\argument\ArgumentPluginBase;
use Drupal\Component\Annotation\PluginID;

/**
 * Argument that accepts query keys for search.
 *
 * @ingroup views_argument_handlers
 *
 * @PluginID("search")
 */
class Search extends ArgumentPluginBase {

  /**
   * Take sure that parseSearchExpression is runned and everything is set up for it.
   *
   * @param $input
   *    The search phrase which was input by the user.
   */
  function query_parse_search_expression($input) {
    if (!isset($this->search_query)) {
      $this->search_query = db_select('search_index', 'i', array(
        'target' => 'slave',
      ))
        ->extend('Drupal\\search\\ViewsSearchQuery');
      $this->search_query
        ->searchExpression($input, $this->view->base_table);
      $this->search_query
        ->publicParseSearchExpression();
    }
  }

  /**
   * Add this argument to the query.
   */
  public function query($group_by = FALSE) {
    $required = FALSE;
    $this
      ->query_parse_search_expression($this->argument);
    if (!isset($this->search_query)) {
      $required = TRUE;
    }
    else {
      $words = $this->search_query
        ->words();
      if (empty($words)) {
        $required = TRUE;
      }
    }
    if ($required) {
      if ($this->operator == 'required') {
        $this->query
          ->addWhere(0, 'FALSE');
      }
    }
    else {
      $search_index = $this
        ->ensureMyTable();
      $search_condition = db_and();

      // Create a new join to relate the 'search_total' table to our current 'search_index' table.
      $definition = array(
        'table' => 'search_total',
        'field' => 'word',
        'left_table' => $search_index,
        'left_field' => 'word',
      );
      $join = drupal_container()
        ->get('plugin.manager.views.join')
        ->createInstance('standard', $definition);
      $search_total = $this->query
        ->addRelationship('search_total', $join, $search_index);
      $this->search_score = $this->query
        ->addField('', "SUM({$search_index}.score * {$search_total}.count)", 'score', array(
        'aggregate' => TRUE,
      ));
      if (empty($this->query->relationships[$this->relationship])) {
        $base_table = $this->view->storage
          ->get('base_table');
      }
      else {
        $base_table = $this->query->relationships[$this->relationship]['base'];
      }
      $search_condition
        ->condition("{$search_index}.type", $base_table);
      if (!$this->search_query
        ->simple()) {
        $search_dataset = $this->query
          ->addTable('search_dataset');
        $conditions = $this->search_query
          ->conditions();
        $condition_conditions =& $conditions
          ->conditions();
        foreach ($condition_conditions as $key => &$condition) {

          // Take sure we just look at real conditions.
          if (is_numeric($key)) {

            // Replace the conditions with the table alias of views.
            $this->search_query
              ->condition_replace_string('d.', "{$search_dataset}.", $condition);
          }
        }
        $search_conditions =& $search_condition
          ->conditions();
        $search_conditions = array_merge($search_conditions, $condition_conditions);
      }
      else {

        // Stores each condition, so and/or on the filter level will still work.
        $or = db_or();
        foreach ($words as $word) {
          $or
            ->condition("{$search_index}.word", $word);
        }
        $search_condition
          ->condition($or);
      }
      $this->query
        ->addWhere(0, $search_condition);
      $this->query
        ->addGroupBy("{$search_index}.sid");
      $matches = $this->search_query
        ->matches();
      $placeholder = $this
        ->placeholder();
      $this->query
        ->addHavingExpression(0, "COUNT(*) >= {$placeholder}", array(
        $placeholder => $matches,
      ));
    }
  }

}