<?php

/**
 * Shows the similarity of the node.
 *
 * @ingroup views_field_handlers
 */
class similarterms_handler_field_similar extends views_handler_field {
  function option_definition() {
    $options = parent::option_definition();
    $options['count_type'] = array('default' => 1);
    $options['percent_suffix'] = array('default' => 1);
    return $options;
  }

  function options_form(&$form, &$form_state) {
    parent::options_form($form, $form_state);

    $form['count_type'] = array(
      '#type' => 'radios',
      '#title' => t('Display type'),
      '#default_value' => $this->options['count_type'],
      '#options' => array(
        0 => t('Show count of common terms'),
        1 => t('Show as percentage'),
      ),
    );

    $form['percent_suffix'] = array(
      '#type' => 'checkbox',
      '#title' => t('Append % when showing percentage'),
      '#default_value' => !empty($this->options['percent_suffix']),
    );
  }

  function query() {
    $params = array(
      'function' => 'count',
    );
    $this->field_alias = $this->query->add_field('node', 'nid', NULL, $params);
  }

  function render($values) {
    if ($this->options['count_type'] == 0) {
      return $values->{$this->field_alias};
    }
    elseif ($this->view->tids) {
      $output = round($values->{$this->field_alias}/count($this->view->tids) * 100);
      if (!empty($this->options['percent_suffix'])) {
        $output .= '%';
      }
      return $output;
    }

  }
}