<?php

/**
 * @file
 * Allows a stock property in the path to be used to filter a view
 *
 * @ingroup tripal_stock
 * @ingroup views_argument_handlers
 */
class views_handler_argument_stockprop_id extends views_handler_argument_string {

  function options_form(&$form, &$form_state) {
    parent::options_form($form, $form_state);
    unset($form['glossary']);
    unset($form['limit']);
    unset($form['add_table']);
    unset($form['require_value']);

    //get options & display as options
    $previous_db = tripal_db_set_active('chado');
    $result = db_query("SELECT cvt.cvterm_id as type_id, cvt.name FROM cvterm cvt WHERE cvt.cvterm_id IN (SELECT type_id FROM stockprop)");
    tripal_db_set_active($previous_db);
    $types = array();
    while ($r = db_fetch_object($result)) {
      $types[$r->type_id] = $r->name;
    }
    $form['stockprop_type_id'] = array(
      '#type' => 'radios',
      '#title' => t('Property Types'),
      '#options' => $types,
      '#default_value' => $this->options['stockprop_type_id'],
      '#required' => TRUE,
      '#description' => t('Select the type of property represented by this argument.'),
    );

    $operators = array(
      '=' => t('Is equal to'),
      '!=' => t('Is not equal to'),
      '~' => t('Contains'),
      '!~' => t('Does not contain'),
      'IS NOT NULL' => t('Is Present (Not Empty)'),
      'IS NULL' => t('Is Absent (Empty)'),
    );
    $form['operator'] = array(
      '#type' => 'radios',
      '#title' => 'Operator',
      '#description' => t('Specify how to compare the argument with the property values.'),
      '#options' => $operators,
      '#default_value' => $this->options['operator'],
      '#required' => TRUE,
    );
  }

  /**
   * Build the query based upon the formula
   */
  function query() {
    $argument = $this->argument;
    if (!empty($this->options['transform_dash'])) {
      $argument = strtr($argument, '-', ' ');
    }

    if (preg_match('/IS NOT NULL/', $this->options['operator'])) {
      $new_where_sql = "stock.stock_id IN (SELECT stockprop.stock_id FROM stockprop WHERE stockprop.type_id=" . $this->options['stockprop_type_id'] . ")";
    }
    elseif (preg_match('/IS NULL/', $this->options['operator'])) {
      $new_where_sql = "stock.stock_id NOT IN (SELECT stockprop.stock_id FROM stockprop WHERE stockprop.type_id=" . $this->options['stockprop_type_id'] . ")";
    }
    else {
      $new_where_sql = "stock.stock_id IN (SELECT stockprop.stock_id FROM stockprop "
              . "WHERE stockprop.type_id=" . $this->options['stockprop_type_id'] . " AND stockprop.value" . $this->options['operator'] . "'" . $argument . "')";
    }
    $this->query->add_where($this->options['group'], $new_where_sql);
  }

}