class views_handler_filter_term_node_tid

class views_handler_filter_term_node_tid extends views_handler_filter_many_to_one {
    
    /**
     * Stores the exposed input for this filter.
     */
    public $validated_exposed_input = NULL;
    
    /**
     * {@inheritdoc}
     */
    public function init(&$view, &$options) {
        parent::init($view, $options);
        if (!empty($this->definition['vocabulary'])) {
            $this->options['vocabulary'] = $this->definition['vocabulary'];
        }
        // Convert legacy vid option to machine name vocabulary.
        if (isset($this->options['vid']) && !empty($this->options['vid']) & empty($this->options['vocabulary'])) {
            $vocabularies = taxonomy_get_vocabularies();
            $vid = $this->options['vid'];
            if (isset($vocabularies[$vid], $vocabularies[$vid]->machine_name)) {
                $this->options['vocabulary'] = $vocabularies[$vid]->machine_name;
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function has_extra_options() {
        return TRUE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function get_value_options() {
        // Don't overwrite the value options.
    }
    
    /**
     * {@inheritdoc}
     */
    public function option_definition() {
        $options = parent::option_definition();
        $options['type'] = array(
            'default' => 'textfield',
        );
        $options['limit'] = array(
            'default' => TRUE,
            'bool' => TRUE,
        );
        $options['vocabulary'] = array(
            'default' => 0,
        );
        $options['hierarchy'] = array(
            'default' => 0,
        );
        $options['error_message'] = array(
            'default' => TRUE,
            'bool' => TRUE,
        );
        $options['optgroups'] = array(
            'default' => 0,
        );
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function extra_options_form(&$form, &$form_state) {
        $vocabularies = taxonomy_get_vocabularies();
        $options = array();
        foreach ($vocabularies as $voc) {
            $options[$voc->machine_name] = check_plain($voc->name);
        }
        if ($this->options['limit']) {
            // We only do this when the form is displayed.
            if (empty($this->options['vocabulary'])) {
                $first_vocabulary = reset($vocabularies);
                $this->options['vocabulary'] = $first_vocabulary->machine_name;
            }
            if (empty($this->definition['vocabulary'])) {
                $form['vocabulary'] = array(
                    '#type' => 'radios',
                    '#title' => t('Vocabulary'),
                    '#options' => $options,
                    '#description' => t('Select which vocabulary to show terms for in the regular options.'),
                    '#default_value' => $this->options['vocabulary'],
                );
            }
        }
        $form['type'] = array(
            '#type' => 'radios',
            '#title' => t('Selection type'),
            '#options' => array(
                'select' => t('Dropdown'),
                'textfield' => t('Autocomplete'),
            ),
            '#default_value' => $this->options['type'],
        );
        $form['hierarchy'] = array(
            '#type' => 'checkbox',
            '#title' => t('Show hierarchy in dropdown'),
            '#default_value' => !empty($this->options['hierarchy']),
            '#dependency' => array(
                'radio:options[type]' => array(
                    'select',
                ),
            ),
        );
        $form['optgroups'] = array(
            '#type' => 'checkbox',
            '#title' => t('Show groups in dropdown'),
            '#default_value' => !empty($this->options['optgroups']),
            '#dependency' => array(
                'radio:options[type]' => array(
                    'select',
                ),
            ),
        );
    }
    
    /**
     * {@inheritdoc}
     */
    public function value_form(&$form, &$form_state) {
        $vocabulary = taxonomy_vocabulary_machine_name_load($this->options['vocabulary']);
        if (empty($vocabulary) && $this->options['limit']) {
            $form['markup'] = array(
                '#markup' => '<div class="form-item">' . t('An invalid vocabulary is selected. Please change it in the options.') . '</div>',
            );
            return;
        }
        if ($this->options['type'] == 'textfield') {
            $default = '';
            if ($this->value) {
                $result = taxonomy_term_load_multiple($this->value);
                foreach ($result as $entity_term) {
                    if ($default) {
                        $default .= ', ';
                    }
                    $default .= entity_label('taxonomy_term', $entity_term);
                }
            }
            $form['value'] = array(
                '#title' => $this->options['limit'] ? t('Select terms from vocabulary @voc', array(
                    '@voc' => $vocabulary->name,
                )) : t('Select terms'),
                '#type' => 'textfield',
                '#default_value' => $default,
            );
            if ($this->options['limit']) {
                $form['value']['#autocomplete_path'] = 'admin/views/ajax/autocomplete/taxonomy/' . $vocabulary->vid;
            }
        }
        else {
            $options = array();
            if (!empty($this->options['hierarchy']) && $this->options['limit']) {
                $tree = taxonomy_get_tree($vocabulary->vid, 0, NULL, TRUE);
                $options = array();
                if (!empty($tree)) {
                    if (!empty($this->options['optgroups'])) {
                        foreach ($tree as $term) {
                            $term_name = entity_label('taxonomy_term', $term);
                            if ($term->parents[0] == 0) {
                                $parent_name = $term_name;
                            }
                            else {
                                $options[$parent_name][$term->tid] = str_repeat('-', $term->depth - 1) . $term_name;
                            }
                        }
                    }
                    else {
                        foreach ($tree as $term) {
                            $options[$term->tid] = str_repeat('-', $term->depth) . entity_label('taxonomy_term', $term);
                        }
                    }
                }
            }
            else {
                $query = db_select('taxonomy_term_data', 'td');
                $query->innerJoin('taxonomy_vocabulary', 'tv', 'td.vid = tv.vid');
                $query->fields('td');
                $query->orderby('tv.weight');
                $query->orderby('tv.name');
                $query->orderby('td.weight');
                $query->orderby('td.name');
                $query->addTag('taxonomy_term_access');
                if ($this->options['limit']) {
                    $query->condition('tv.machine_name', $vocabulary->machine_name);
                }
                $result = $query->execute();
                $tids = array();
                foreach ($result as $term) {
                    $tids[] = $term->tid;
                }
                $entities = taxonomy_term_load_multiple($tids);
                foreach ($entities as $entity_term) {
                    $options[$entity_term->tid] = entity_label('taxonomy_term', $entity_term);
                }
            }
            $default_value = (array) $this->value;
            if (!empty($form_state['exposed'])) {
                $identifier = $this->options['expose']['identifier'];
                if (!empty($this->options['expose']['reduce'])) {
                    $options = $this->reduce_value_options($options);
                    if (!empty($this->options['expose']['multiple']) && empty($this->options['expose']['required'])) {
                        $default_value = array();
                    }
                }
                if (empty($this->options['expose']['multiple'])) {
                    if (empty($this->options['expose']['required']) && (empty($default_value) || !empty($this->options['expose']['reduce']))) {
                        $default_value = 'All';
                    }
                    elseif (empty($default_value)) {
                        $keys = array_keys($options);
                        $default_value = array_shift($keys);
                    }
                    elseif ($default_value == array(
                        '',
                    )) {
                        $default_value = 'All';
                    }
                    else {
                        $copy = $default_value;
                        $default_value = array_shift($copy);
                    }
                }
            }
            $form['value'] = array(
                '#type' => 'select',
                '#title' => $this->options['limit'] ? t('Select terms from vocabulary @voc', array(
                    '@voc' => $vocabulary->name,
                )) : t('Select terms'),
                '#multiple' => TRUE,
                '#options' => $options,
                '#size' => min(9, count($options)),
                '#default_value' => $default_value,
            );
            if (!empty($form_state['exposed']) && isset($identifier) && !isset($form_state['input'][$identifier])) {
                $form_state['input'][$identifier] = $default_value;
            }
        }
        if (empty($form_state['exposed'])) {
            // Retain the helper option.
            $this->helper
                ->options_form($form, $form_state);
            // Show help text if not exposed to end users.
            $form['value']['#description'] = t('Leave blank for all. Otherwise, the first selected term will be the default instead of "Any".');
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function value_validate($form, &$form_state) {
        // We only validate if they've chosen the text field style.
        if ($this->options['type'] != 'textfield') {
            return;
        }
        $values = drupal_explode_tags($form_state['values']['options']['value']);
        $tids = $this->validate_term_strings($form['value'], $values);
        if ($tids) {
            $form_state['values']['options']['value'] = $tids;
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function accept_exposed_input($input) {
        if (empty($this->options['exposed'])) {
            return TRUE;
        }
        // We need to know the operator, which is normally set in
        // views_handler_filter::accept_exposed_input(), before we actually call
        // the parent version of ourselves.
        if (!empty($this->options['expose']['use_operator']) && !empty($this->options['expose']['operator_id']) && isset($input[$this->options['expose']['operator_id']])) {
            $this->operator = $input[$this->options['expose']['operator_id']];
        }
        // If view is an attachment and is inheriting exposed filters, then assume
        // exposed input has already been validated.
        if (!empty($this->view->is_attachment) && $this->view->display_handler
            ->uses_exposed()) {
            $this->validated_exposed_input = (array) $this->view->exposed_raw_input[$this->options['expose']['identifier']];
        }
        // If we're checking for EMPTY or NOT, we don't need any input, and we can
        // say that our input conditions are met by just having the right operator.
        if ($this->operator == 'empty' || $this->operator == 'not empty') {
            return TRUE;
        }
        // If it's non-required and there's no value don't bother filtering.
        if (!$this->options['expose']['required'] && empty($this->validated_exposed_input)) {
            return FALSE;
        }
        $rc = parent::accept_exposed_input($input);
        if ($rc) {
            // If we have previously validated input, override.
            if (!$this->is_a_group() && isset($this->validated_exposed_input)) {
                $this->value = $this->validated_exposed_input;
            }
        }
        return $rc;
    }
    
    /**
     * {@inheritdoc}
     */
    public function exposed_validate(&$form, &$form_state) {
        if (empty($this->options['exposed'])) {
            return;
        }
        $identifier = $this->options['expose']['identifier'];
        // We only validate if they've chosen the text field style.
        if ($this->options['type'] != 'textfield') {
            if (isset($form_state['values'][$identifier]) && $form_state['values'][$identifier] != 'All') {
                $this->validated_exposed_input = (array) $form_state['values'][$identifier];
            }
            return;
        }
        if (empty($this->options['expose']['identifier'])) {
            return;
        }
        $values = drupal_explode_tags($form_state['values'][$identifier]);
        $tids = $this->validate_term_strings($form[$identifier], $values);
        if ($tids) {
            $this->validated_exposed_input = $tids;
        }
    }
    
    /**
     * Validate the user string. Since this can come from either the form
     * or the exposed filter, this is abstracted out a bit so it can
     * handle the multiple input sources.
     *
     * @param array $form
     *   The form which is used, either the views ui or the exposed filters.
     * @param array $values
     *   The taxonomy names which will be converted to tids.
     *
     * @return array
     *   The taxonomy ids fo all validated terms.
     */
    public function validate_term_strings(&$form, $values) {
        if (empty($values)) {
            return array();
        }
        $tids = array();
        $names = array();
        $missing = array();
        foreach ($values as $value) {
            $missing[strtolower($value)] = TRUE;
            $names[] = $value;
        }
        if (!$names) {
            return FALSE;
        }
        $query = db_select('taxonomy_term_data', 'td');
        $query->innerJoin('taxonomy_vocabulary', 'tv', 'td.vid = tv.vid');
        $query->fields('td');
        $query->condition('td.name', $names);
        $query->condition('tv.machine_name', $this->options['vocabulary']);
        $query->addTag('taxonomy_term_access');
        $result = $query->execute();
        foreach ($result as $term) {
            unset($missing[strtolower($term->name)]);
            $tids[] = $term->tid;
        }
        if ($missing && !empty($this->options['error_message'])) {
            form_error($form, format_plural(count($missing), 'Unable to find term: @terms', 'Unable to find terms: @terms', array(
                '@terms' => implode(', ', array_keys($missing)),
            )));
        }
        elseif ($missing && empty($this->options['error_message'])) {
            $tids = array(
                0,
            );
        }
        return $tids;
    }
    
    /**
     * {@inheritdoc}
     */
    public function value_submit($form, &$form_state) {
        // Prevent array_filter from messing up our arrays in parent submit.
    }
    
    /**
     * {@inheritdoc}
     */
    public function expose_form(&$form, &$form_state) {
        parent::expose_form($form, $form_state);
        if ($this->options['type'] != 'select') {
            unset($form['expose']['reduce']);
        }
        $form['error_message'] = array(
            '#type' => 'checkbox',
            '#title' => t('Display error message'),
            '#default_value' => !empty($this->options['error_message']),
        );
    }
    
    /**
     * {@inheritdoc}
     */
    public function admin_summary() {
        // Set up $this->value_options for the parent summary.
        $this->value_options = array();
        if ($this->value) {
            $this->value = array_filter($this->value);
            $result = taxonomy_term_load_multiple($this->value);
            foreach ($result as $entity_term) {
                $this->value_options[$entity_term->tid] = entity_label('taxonomy_term', $entity_term);
            }
        }
        return parent::admin_summary();
    }

}