class views_plugin_argument_validate_node

class views_plugin_argument_validate_node extends views_plugin_argument_validate {
    
    /**
     * {@inheritdoc}
     */
    public function option_definition() {
        $options = parent::option_definition();
        $options['types'] = array(
            'default' => array(),
        );
        $options['access'] = array(
            'default' => FALSE,
            'bool' => TRUE,
        );
        $options['access_op'] = array(
            'default' => 'view',
        );
        $options['nid_type'] = array(
            'default' => 'nid',
        );
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function options_form(&$form, &$form_state) {
        $types = node_type_get_types();
        $options = array();
        foreach ($types as $type => $info) {
            $options[$type] = check_plain(t($info->name));
        }
        $form['types'] = array(
            '#type' => 'checkboxes',
            '#title' => t('Content types'),
            '#options' => $options,
            '#default_value' => $this->options['types'],
            '#description' => t('Choose one or more content types to validate with.'),
        );
        $form['access'] = array(
            '#type' => 'checkbox',
            '#title' => t('Validate user has access to the content'),
            '#default_value' => $this->options['access'],
        );
        $form['access_op'] = array(
            '#type' => 'radios',
            '#title' => t('Access operation to check'),
            '#options' => array(
                'view' => t('View'),
                'update' => t('Edit'),
                'delete' => t('Delete'),
            ),
            '#default_value' => $this->options['access_op'],
            '#dependency' => array(
                'edit-options-validate-options-node-access' => array(
                    TRUE,
                ),
            ),
        );
        $form['nid_type'] = array(
            '#type' => 'select',
            '#title' => t('Filter value format'),
            '#options' => array(
                'nid' => t('Node ID'),
                'nids' => t('Node IDs separated by , or +'),
            ),
            '#default_value' => $this->options['nid_type'],
        );
    }
    
    /**
     * {@inheritdoc}
     */
    public function options_submit(&$form, &$form_state, &$options = array()) {
        // Filter trash out of the options so we don't store giant unnecessary
        // arrays.
        $options['types'] = array_filter($options['types']);
    }
    
    /**
     * {@inheritdoc}
     */
    public function convert_options(&$options) {
        if (!isset($options['types']) && !empty($this->argument->options['validate_argument_node_type'])) {
            $options['types'] = isset($this->argument->options['validate_argument_node_type']) ? $this->argument->options['validate_argument_node_type'] : array();
            $options['access'] = !empty($this->argument->options['validate_argument_node_access']);
            $options['access_op'] = isset($this->argument->options['validate_argument_node_access_op']) ? $this->argument->options['validate_argument_node_access_op'] : 'view';
            $options['nid_type'] = isset($this->argument->options['validate_argument_nid_type']) ? $this->argument->options['validate_argument_nid_type'] : array();
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function validate_argument($argument) {
        $types = $this->options['types'];
        switch ($this->options['nid_type']) {
            case 'nid':
                if (!is_numeric($argument)) {
                    return FALSE;
                }
                $node = node_load($argument);
                if (!$node) {
                    return FALSE;
                }
                if (!empty($this->options['access'])) {
                    if (!node_access($this->options['access_op'], $node)) {
                        return FALSE;
                    }
                }
                // Save the title() handlers some work.
                $this->argument->validated_title = check_plain($node->title);
                if (empty($types)) {
                    return TRUE;
                }
                return isset($types[$node->type]);
                break;
            case 'nids':
                $nids = new stdClass();
                $nids->value = array(
                    $argument,
                );
                $nids = views_break_phrase($argument, $nids);
                if ($nids->value == array(
                    -1,
                )) {
                    return FALSE;
                }
                $test = drupal_map_assoc($nids->value);
                $titles = array();
                $result = db_query("SELECT * FROM {node} WHERE nid IN (:nids)", array(
                    ':nids' => $nids->value,
                ));
                foreach ($result as $node) {
                    if ($types && empty($types[$node->type])) {
                        return FALSE;
                    }
                    if (!empty($this->options['access'])) {
                        if (!node_access($this->options['access_op'], $node)) {
                            return FALSE;
                        }
                    }
                    $titles[] = check_plain($node->title);
                    unset($test[$node->nid]);
                }
                $this->argument->validated_title = implode($nids->operator == 'or' ? ' + ' : ', ', $titles);
                // If this is not empty, we did not find a nid.
                return empty($test);
        }
    }

}