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class StringFilter in Drupal 10

Same name and namespace in other branches
  1. 8 core/modules/views/src/Plugin/views/filter/StringFilter.php \Drupal\views\Plugin\views\filter\StringFilter
  2. 9 core/modules/views/src/Plugin/views/filter/StringFilter.php \Drupal\views\Plugin\views\filter\StringFilter

Basic textfield filter to handle string filtering commands including equality, like, not like, etc.

Plugin annotation

@ViewsFilter("string");

Hierarchy

Expanded class hierarchy of StringFilter

Related topics

Views filter handler plugins
Plugins that handle views filtering.

File

core/modules/views/src/Plugin/views/filter/StringFilter.php, line 17

Namespace

Drupal\views\Plugin\views\filter
View source 
class StringFilter extends FilterPluginBase {

  /**
   * All words separated by spaces or sentences encapsulated by double quotes.
   */
  const WORDS_PATTERN = '/ (-?)("[^"]+"|[^" ]+)/i';

  /**
   * Exposed filter options.
   *
   * @var bool
   */
  protected $alwaysMultiple = TRUE;

  /**
   * The database connection.
   *
   * @var \Drupal\Core\Database\Connection
   */
  protected $connection;

  /**
   * Constructs a new StringFilter object.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Database\Connection $connection
   *   The database connection.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, Connection $connection) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->connection = $connection;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container
      ->get('database'));
  }
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['expose']['contains']['required'] = [
      'default' => FALSE,
    ];
    $options['expose']['contains']['placeholder'] = [
      'default' => '',
    ];
    return $options;
  }

  /**
   * {@inheritdoc}
   */
  public function defaultExposeOptions() {
    parent::defaultExposeOptions();
    $this->options['expose']['placeholder'] = NULL;
  }

  /**
   * {@inheritdoc}
   */
  public function buildExposeForm(&$form, FormStateInterface $form_state) {
    parent::buildExposeForm($form, $form_state);
    $form['expose']['placeholder'] = [
      '#type' => 'textfield',
      '#default_value' => $this->options['expose']['placeholder'],
      '#title' => $this
        ->t('Placeholder'),
      '#size' => 40,
      '#description' => $this
        ->t('Hint text that appears inside the field when empty.'),
    ];
  }

  /**
   * This kind of construct makes it relatively easy for a child class
   * to add or remove functionality by overriding this function and
   * adding/removing items from this array.
   */
  public function operators() {
    $operators = [
      '=' => [
        'title' => $this
          ->t('Is equal to'),
        'short' => $this
          ->t('='),
        'method' => 'opEqual',
        'values' => 1,
      ],
      '!=' => [
        'title' => $this
          ->t('Is not equal to'),
        'short' => $this
          ->t('!='),
        'method' => 'opEqual',
        'values' => 1,
      ],
      'contains' => [
        'title' => $this
          ->t('Contains'),
        'short' => $this
          ->t('contains'),
        'method' => 'opContains',
        'values' => 1,
      ],
      'word' => [
        'title' => $this
          ->t('Contains any word'),
        'short' => $this
          ->t('has word'),
        'method' => 'opContainsWord',
        'values' => 1,
      ],
      'allwords' => [
        'title' => $this
          ->t('Contains all words'),
        'short' => $this
          ->t('has all'),
        'method' => 'opContainsWord',
        'values' => 1,
      ],
      'starts' => [
        'title' => $this
          ->t('Starts with'),
        'short' => $this
          ->t('begins'),
        'method' => 'opStartsWith',
        'values' => 1,
      ],
      'not_starts' => [
        'title' => $this
          ->t('Does not start with'),
        'short' => $this
          ->t('not_begins'),
        'method' => 'opNotStartsWith',
        'values' => 1,
      ],
      'ends' => [
        'title' => $this
          ->t('Ends with'),
        'short' => $this
          ->t('ends'),
        'method' => 'opEndsWith',
        'values' => 1,
      ],
      'not_ends' => [
        'title' => $this
          ->t('Does not end with'),
        'short' => $this
          ->t('not_ends'),
        'method' => 'opNotEndsWith',
        'values' => 1,
      ],
      'not' => [
        'title' => $this
          ->t('Does not contain'),
        'short' => $this
          ->t('!has'),
        'method' => 'opNotLike',
        'values' => 1,
      ],
      'shorterthan' => [
        'title' => $this
          ->t('Length is shorter than'),
        'short' => $this
          ->t('shorter than'),
        'method' => 'opShorterThan',
        'values' => 1,
      ],
      'longerthan' => [
        'title' => $this
          ->t('Length is longer than'),
        'short' => $this
          ->t('longer than'),
        'method' => 'opLongerThan',
        'values' => 1,
      ],
      'regular_expression' => [
        'title' => $this
          ->t('Regular expression'),
        'short' => $this
          ->t('regex'),
        'method' => 'opRegex',
        'values' => 1,
      ],
    ];

    // if the definition allows for the empty operator, add it.
    if (!empty($this->definition['allow empty'])) {
      $operators += [
        'empty' => [
          'title' => $this
            ->t('Is empty (NULL)'),
          'method' => 'opEmpty',
          'short' => $this
            ->t('empty'),
          'values' => 0,
        ],
        'not empty' => [
          'title' => $this
            ->t('Is not empty (NOT NULL)'),
          'method' => 'opEmpty',
          'short' => $this
            ->t('not empty'),
          'values' => 0,
        ],
      ];
    }
    return $operators;
  }

  /**
   * Build strings from the operators() for 'select' options.
   */
  public function operatorOptions($which = 'title') {
    $options = [];
    foreach ($this
      ->operators() as $id => $info) {
      $options[$id] = $info[$which];
    }
    return $options;
  }
  public function adminSummary() {
    if ($this
      ->isAGroup()) {
      return $this
        ->t('grouped');
    }
    if (!empty($this->options['exposed'])) {
      return $this
        ->t('exposed');
    }
    $options = $this
      ->operatorOptions('short');
    $output = '';
    if (!empty($options[$this->operator])) {
      $output = $options[$this->operator];
    }
    if (in_array($this->operator, $this
      ->operatorValues(1))) {
      $output .= ' ' . $this->value;
    }
    return $output;
  }
  protected function operatorValues($values = 1) {
    $options = [];
    foreach ($this
      ->operators() as $id => $info) {
      if (isset($info['values']) && $info['values'] == $values) {
        $options[] = $id;
      }
    }
    return $options;
  }

  /**
   * Provide a simple textfield for equality.
   */
  protected function valueForm(&$form, FormStateInterface $form_state) {

    // We have to make some choices when creating this as an exposed
    // filter form. For example, if the operator is locked and thus
    // not rendered, we can't render dependencies; instead we only
    // render the form items we need.
    $which = 'all';
    if (!empty($form['operator'])) {
      $source = ':input[name="options[operator]"]';
    }
    if ($exposed = $form_state
      ->get('exposed')) {
      $identifier = $this->options['expose']['identifier'];
      if (empty($this->options['expose']['use_operator']) || empty($this->options['expose']['operator_id'])) {

        // exposed and locked.
        $which = in_array($this->operator, $this
          ->operatorValues(1)) ? 'value' : 'none';
      }
      else {
        $source = ':input[name="' . $this->options['expose']['operator_id'] . '"]';
      }
    }
    if ($which == 'all' || $which == 'value') {
      $form['value'] = [
        '#type' => 'textfield',
        '#title' => $this
          ->t('Value'),
        '#size' => 30,
        '#default_value' => $this->value,
      ];
      if (!empty($this->options['expose']['placeholder'])) {
        $form['value']['#attributes']['placeholder'] = $this->options['expose']['placeholder'];
      }
      $user_input = $form_state
        ->getUserInput();
      if ($exposed && !isset($user_input[$identifier])) {
        $user_input[$identifier] = $this->value;
        $form_state
          ->setUserInput($user_input);
      }
      if ($which == 'all') {

        // Setup #states for all operators with one value.
        foreach ($this
          ->operatorValues(1) as $operator) {
          $form['value']['#states']['visible'][] = [
            $source => [
              'value' => $operator,
            ],
          ];
        }
      }
    }
    if (!isset($form['value'])) {

      // Ensure there is something in the 'value'.
      $form['value'] = [
        '#type' => 'value',
        '#value' => NULL,
      ];
    }
  }

  /**
   * Get the query operator.
   *
   * @return string
   *   Returns LIKE or NOT LIKE or the database specific equivalent based on the
   *   query's operator.
   */
  public function operator() {
    return $this
      ->getConditionOperator($this->operator == '=' ? 'LIKE' : 'NOT LIKE');
  }

  /**
   * Get specified condition operator mapping value.
   *
   * @param string $operator
   *   Condition operator.
   *
   * @return string
   *   Specified condition operator mapping value.
   */
  protected function getConditionOperator($operator) {
    $mapping = $this->connection
      ->mapConditionOperator($operator);
    return $mapping['operator'] ?? $operator;
  }

  /**
   * Add this filter to the query.
   *
   * Due to the nature of fapi, the value and the operator have an unintended
   * level of indirection. You will find them in $this->operator
   * and $this->value respectively.
   */
  public function query() {
    $this
      ->ensureMyTable();
    $field = "{$this->tableAlias}.{$this->realField}";
    $info = $this
      ->operators();
    if (!empty($info[$this->operator]['method'])) {
      $this
        ->{$info[$this->operator]['method']}($field);
    }
  }
  public function opEqual($field) {
    $this->query
      ->addWhere($this->options['group'], $field, $this->value, $this
      ->operator());
  }
  protected function opContains($field) {
    $operator = $this
      ->getConditionOperator('LIKE');
    $this->query
      ->addWhere($this->options['group'], $field, '%' . $this->connection
      ->escapeLike($this->value) . '%', $operator);
  }
  protected function opContainsWord($field) {
    $where = $this->operator == 'word' ? $this->query
      ->getConnection()
      ->condition('OR') : $this->query
      ->getConnection()
      ->condition('AND');

    // Don't filter on empty strings.
    if (empty($this->value)) {
      return;
    }
    preg_match_all(static::WORDS_PATTERN, ' ' . $this->value, $matches, PREG_SET_ORDER);
    $operator = $this
      ->getConditionOperator('LIKE');
    foreach ($matches as $match) {
      $phrase = FALSE;

      // Strip off phrase quotes
      if ($match[2][0] == '"') {
        $match[2] = substr($match[2], 1, -1);
        $phrase = TRUE;
      }
      $words = trim($match[2], ',?!();:-');
      $words = $phrase ? [
        $words,
      ] : preg_split('/ /', $words, -1, PREG_SPLIT_NO_EMPTY);
      foreach ($words as $word) {
        $where
          ->condition($field, '%' . $this->connection
          ->escapeLike(trim($word, " ,!?")) . '%', $operator);
      }
    }
    if ($where
      ->count() === 0) {
      return;
    }

    // previously this was a call_user_func_array but that's unnecessary
    // as views will unpack an array that is a single arg.
    $this->query
      ->addWhere($this->options['group'], $where);
  }
  protected function opStartsWith($field) {
    $operator = $this
      ->getConditionOperator('LIKE');
    $this->query
      ->addWhere($this->options['group'], $field, $this->connection
      ->escapeLike($this->value) . '%', $operator);
  }
  protected function opNotStartsWith($field) {
    $operator = $this
      ->getConditionOperator('NOT LIKE');
    $this->query
      ->addWhere($this->options['group'], $field, $this->connection
      ->escapeLike($this->value) . '%', $operator);
  }
  protected function opEndsWith($field) {
    $operator = $this
      ->getConditionOperator('LIKE');
    $this->query
      ->addWhere($this->options['group'], $field, '%' . $this->connection
      ->escapeLike($this->value), $operator);
  }
  protected function opNotEndsWith($field) {
    $operator = $this
      ->getConditionOperator('NOT LIKE');
    $this->query
      ->addWhere($this->options['group'], $field, '%' . $this->connection
      ->escapeLike($this->value), $operator);
  }
  protected function opNotLike($field) {
    $operator = $this
      ->getConditionOperator('NOT LIKE');
    $this->query
      ->addWhere($this->options['group'], $field, '%' . $this->connection
      ->escapeLike($this->value) . '%', $operator);
  }
  protected function opShorterThan($field) {
    $placeholder = $this
      ->placeholder();

    // Type cast the argument to an integer because the SQLite database driver
    // has to do some specific alterations to the query base on that data type.
    $this->query
      ->addWhereExpression($this->options['group'], "LENGTH({$field}) < {$placeholder}", [
      $placeholder => (int) $this->value,
    ]);
  }
  protected function opLongerThan($field) {
    $placeholder = $this
      ->placeholder();

    // Type cast the argument to an integer because the SQLite database driver
    // has to do some specific alterations to the query base on that data type.
    $this->query
      ->addWhereExpression($this->options['group'], "LENGTH({$field}) > {$placeholder}", [
      $placeholder => (int) $this->value,
    ]);
  }

  /**
   * Filters by a regular expression.
   *
   * @param string $field
   *   The expression pointing to the queries field, for example "foo.bar".
   */
  protected function opRegex($field) {
    $this->query
      ->addWhere($this->options['group'], $field, $this->value, 'REGEXP');
  }
  protected function opEmpty($field) {
    if ($this->operator == 'empty') {
      $operator = "IS NULL";
    }
    else {
      $operator = "IS NOT NULL";
    }
    $this->query
      ->addWhere($this->options['group'], $field, NULL, $operator);
  }

}

Members

Namesort descending Modifiers Type Description Overrides
FilterPluginBase::$always_required public property Disable the possibility to allow an exposed input to be optional.
FilterPluginBase::$group_info public property Contains the information of the selected item in a grouped filter.
FilterPluginBase::$no_operator public property Disable the possibility to use operators. 1
FilterPluginBase::$operator public property Contains the operator which is used on the query.
FilterPluginBase::$value public property Contains the actual value of the field,either configured in the views ui or entered in the exposed filters.
FilterPluginBase::acceptExposedInput public function Determines if the input from a filter should change the generated query. 2
FilterPluginBase::addGroupForm public function Add a new group to the exposed filter groups.
FilterPluginBase::arrayFilterZero protected static function Filter by no empty values, though allow the use of (string) "0".
FilterPluginBase::buildExposedFiltersGroupForm protected function Build the form to let users create the group of exposed filters.
FilterPluginBase::buildExposedForm public function Render our chunk of the exposed filter form when selecting.
FilterPluginBase::buildGroupForm public function Displays the Build Group form.
FilterPluginBase::buildGroupOptions protected function Provide default options for exposed filters.
FilterPluginBase::buildGroupSubmit protected function Save new group items, re-enumerates and remove groups marked to delete.
FilterPluginBase::buildGroupValidate protected function Validate the build group options form.
FilterPluginBase::buildOptionsForm public function Provide the basic form which calls through to subforms. 2
FilterPluginBase::buildValueWrapper protected function Builds wrapper for value and operator forms.
FilterPluginBase::canBuildGroup protected function Determine if a filter can be converted into a group.
FilterPluginBase::canExpose public function Determine if a filter can be exposed. 5
FilterPluginBase::canGroup public function Can this filter be used in OR groups? 1
FilterPluginBase::convertExposedInput public function Transform the input from a grouped filter into a standard filter.
FilterPluginBase::exposedInfo public function Tell the renderer about our exposed form. This only needs to be overridden for particularly complex forms. And maybe not even then.
FilterPluginBase::exposedTranslate protected function Make some translations to a form item to make it more suitable to exposing.
FilterPluginBase::getCacheContexts public function The cache contexts associated with this object. Overrides CacheableDependencyInterface::getCacheContexts 6
FilterPluginBase::getCacheMaxAge public function The maximum age for which this object may be cached. Overrides CacheableDependencyInterface::getCacheMaxAge
FilterPluginBase::getCacheTags public function The cache tags associated with this object. Overrides CacheableDependencyInterface::getCacheTags 1
FilterPluginBase::groupForm public function Build a form containing a group of operator | values to apply as a single filter.
FilterPluginBase::groupMultipleExposedInput public function Returns the options available for a grouped filter that users checkboxes as widget, and therefore has to be applied several times, one per item selected.
FilterPluginBase::hasValidGroupedValue protected function Determines if the given grouped filter entry has a valid value. 1
FilterPluginBase::init public function Overrides \Drupal\views\Plugin\views\HandlerBase::init(). 2
FilterPluginBase::isAGroup public function Returns TRUE if the exposed filter works like a grouped filter.
FilterPluginBase::multipleExposedInput public function Returns TRUE if users can select multiple groups items of a grouped exposed filter.
FilterPluginBase::operatorForm protected function Options form subform for setting the operator. 5
FilterPluginBase::operatorSubmit public function Perform any necessary changes to the form values prior to storage.
FilterPluginBase::operatorValidate protected function Validate the operator form.
FilterPluginBase::prepareFilterSelectOptions protected function Sanitizes the HTML select element's options.
FilterPluginBase::showBuildGroupButton protected function Shortcut to display the build_group/hide button.
FilterPluginBase::showBuildGroupForm public function Shortcut to display the exposed options form.
FilterPluginBase::showExposeButton public function Shortcut to display the expose/hide button.
FilterPluginBase::showOperatorForm public function Shortcut to display the operator form.
FilterPluginBase::showValueForm protected function Shortcut to display the value form.
FilterPluginBase::storeExposedInput public function
FilterPluginBase::storeGroupInput public function If set to remember exposed input in the session, store it there.
FilterPluginBase::submitOptionsForm public function Simple submit handler.
FilterPluginBase::trustedCallbacks public static function
FilterPluginBase::validate public function 2
FilterPluginBase::validateExposeForm public function Validate the options form.
FilterPluginBase::validateIdentifier protected function Validates a filter identifier.
FilterPluginBase::validateOptionsForm public function Simple validate handler. 1
FilterPluginBase::valueSubmit protected function Perform any necessary changes to the form values prior to storage. 1
FilterPluginBase::valueValidate protected function Validate the options form. 2
StringFilter::$alwaysMultiple protected property Exposed filter options. Overrides FilterPluginBase::$alwaysMultiple
StringFilter::$connection protected property The database connection.
StringFilter::adminSummary public function Display the filter on the administrative summary. Overrides FilterPluginBase::adminSummary
StringFilter::buildExposeForm public function Options form subform for exposed filter options. Overrides FilterPluginBase::buildExposeForm
StringFilter::create public static function
StringFilter::defaultExposeOptions public function Provide default options for exposed filters. Overrides FilterPluginBase::defaultExposeOptions
StringFilter::defineOptions protected function Overrides FilterPluginBase::defineOptions 1
StringFilter::getConditionOperator protected function Get specified condition operator mapping value.
StringFilter::opContains protected function 1
StringFilter::opContainsWord protected function 1
StringFilter::opEmpty protected function 1
StringFilter::opEndsWith protected function 1
StringFilter::opEqual public function 1
StringFilter::operator public function Get the query operator.
StringFilter::operatorOptions public function Build strings from the operators() for 'select' options. Overrides FilterPluginBase::operatorOptions
StringFilter::operators public function This kind of construct makes it relatively easy for a child class to add or remove functionality by overriding this function and adding/removing items from this array.
StringFilter::operatorValues protected function
StringFilter::opLongerThan protected function
StringFilter::opNotEndsWith protected function 1
StringFilter::opNotLike protected function 1
StringFilter::opNotStartsWith protected function 1
StringFilter::opRegex protected function Filters by a regular expression. 1
StringFilter::opShorterThan protected function
StringFilter::opStartsWith protected function 1
StringFilter::query public function Add this filter to the query. Overrides FilterPluginBase::query 1
StringFilter::valueForm protected function Provide a simple textfield for equality. Overrides FilterPluginBase::valueForm
StringFilter::WORDS_PATTERN constant All words separated by spaces or sentences encapsulated by double quotes.
StringFilter::__construct public function Constructs a new StringFilter object.