<?php
// $Id: views_plugin_argument_validate_taxonomy_term.inc,v 1.3 2009/03/24 22:03:58 merlinofchaos Exp $
/**
 * @file
 * Contains the 'taxonomy term' argument validator plugin.
 */

/**
 * Validate whether an argument is an acceptable node.
 */
class views_plugin_argument_validate_taxonomy_term extends views_plugin_argument_validate {
  function validate_form(&$form, &$form_state) {
    $vocabularies = taxonomy_get_vocabularies();
    $options = array();
    foreach ($vocabularies as $voc) {
      $options[$voc->vid] = check_plain($voc->name);
    }

    $form['validate_argument_vocabulary'] = array(
      '#type' => 'checkboxes',
      '#prefix' => '<div id="edit-options-validate-argument-vocabulary-wrapper">',
      '#suffix' => '</div>',
      '#title' => t('Vocabularies'),
      '#options' => $options,
      '#default_value' => isset($this->argument->options['validate_argument_vocabulary']) ? $this->argument->options['validate_argument_vocabulary'] : array(),
      '#description' => t('If you wish to validate for specific vocabularies, check them; if none are checked, all terms will pass.'),
      '#process' => array('expand_checkboxes', 'views_process_dependency'),
      '#dependency' => array('edit-options-validate-type' => array($this->id)),
    );

    $form['validate_argument_type'] = array(
      '#type' => 'select',
      '#title' => t('Argument type'),
      '#options' => array(
        'tid' => t('Term ID'),
        'tids' => t('Term IDs separated by , or +'),
        'name' => t('Term name or synonym'),
        'convert' => t('Term name/synonym converted to Term ID'),
      ),
      '#default_value' => isset($this->argument->options['validate_argument_type']) ? $this->argument->options['validate_argument_type'] : 'tid',
      '#description' => t('Select the form of this argument; if using term name, it is generally more efficient to convert it to a term ID and use Taxonomy: Term ID rather than Taxonomy: Term Name" as an argument.'),
      '#process' => array('views_process_dependency'),
      '#dependency' => array('edit-options-validate-type' => array($this->id)),
    );

    $form['validate_argument_transform'] = array(
      '#type' => 'checkbox',
      '#title' => t('Transform dashes in URL to spaces in term name arguments'),
      '#default_value' => isset($this->argument->options['validate_argument_transform']) ? $this->argument->options['validate_argument_transform'] : FALSE,
      '#process' => array('views_process_dependency'),
      '#dependency' => array('edit-options-validate-type' => array($this->id)),
    );
  }

  function validate_argument($argument) {
    $vids = isset($this->argument->options['validate_argument_vocabulary']) ? array_filter($this->argument->options['validate_argument_vocabulary']) : array();
    $type = isset($this->argument->options['validate_argument_type']) ? $this->argument->options['validate_argument_type'] : 'tid';
    $transform = isset($this->argument->options['validate_argument_transform']) ? $this->argument->options['validate_argument_transform'] : FALSE;

    switch ($type) {
      case 'tid':
        if (!is_numeric($argument)) {
          return FALSE;
        }

        $result = db_fetch_object(db_query("SELECT * FROM {term_data} WHERE tid = %d", $argument));
        if (!$result) {
          return FALSE;
        }

        return empty($vids) || !empty($vids[$result->vid]);
      case 'tids':
        $tids = new stdClass();
        $tids->value = $argument;
        $tids = views_break_phrase($argument, $tids);
        if ($tids->value == array(-1)) {
          return FALSE;
        }

        $placeholders = implode(', ', array_fill(0, sizeof($tids->value), '%d'));

        $test = drupal_map_assoc($tids->value);
        $titles = array();

        $result = db_query("SELECT * FROM {term_data} WHERE tid IN ($placeholders)", $tids->value);
        while ($term = db_fetch_object($result)) {
          if ($vids && empty($vids[$term->vid])) {
            return FALSE;
          }

          $titles[] = check_plain($term->name);
          unset($test[$term->tid]);
        }

        $this->argument->validated_title = implode($tids->operator == 'or' ? ' + ' : ', ', $titles);
        // If this is not empty, we did not find a tid.
        return empty($test);
      case 'name':
      case 'convert':
        $and = '';
        if (!empty($vids)) {
          $and = " AND td.vid IN(" . implode(', ', $vids) . ')';
        }
        if ($transform) {
          $argument = str_replace('-', ' ', $argument);
        }
        $result = db_fetch_object(db_query("SELECT td.* FROM {term_data} td LEFT JOIN {term_synonym} ts ON ts.tid = td.tid WHERE (td.name = '%s' OR ts.name = '%s')$and", $argument, $argument));
        if (!$result) {
          return FALSE;
        }

        if ($type == 'convert') {
          $this->argument->argument = $result->tid;
        }

        return TRUE;
    }
  }
}
