<?php
/*
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC. All rights reserved.                        |
 |                                                                    |
 | This work is published under the GNU AGPLv3 license with some      |
 | permitted exceptions and without any warranty. For full license    |
 | and copyright information, see https://civicrm.org/licensing       |
 +--------------------------------------------------------------------+
 */

/**
 * @file Provides Views integration for CiviCRM Multi-Select Country custom fields
 *
 * @author DaveJ
 * based on civicrm_handler_filter_custom_option and civicrm_handler_filter_state
 */
class civicrm_handler_filter_state_multi extends views_handler_filter_in_operator {

  public function construct() {
    parent::construct();
    if (!civicrm_initialize()) {
      return;
    }
  }

  public function get_value_options() {
    if (!isset($this->value_options)) {
      $states = CRM_Core_PseudoConstant::stateProvince();
      $options = array();
      if (is_array($states)) {
        foreach ($states as $id => $name) {
          $options[$id] = $name;
        }
      }
      $this->value_options = $options;
    }

    //* code to add country->state/province conditional options first determine if there's a country filter on this view if there is, load the country->state options into a JSON object we can attach via javascript. Remove the state options set above and attach the javascript handler

    // get the country filter
    $filters = is_array($this->view->filter) ? $this->view->filter : array();
    $state = '';
    foreach ($filters as $name => $handler) {
      if ($handler->definition['handler'] == 'civicrm_handler_filter_country_multi') {
        $country_field = $handler->field;
        $selected_countries = $loaded_list = array();
        if (isset($this->view->exposed_input[$country_field])
         && count((array) $this->view->exposed_input[$country_field])) {
          $selected_countries = (array) $this->view->exposed_input[$country_field];
        }
        $allowedCountries = array_keys($handler->value_options);
        if (empty($allowedCountries)) {
          $allowedCountries = array_keys(CRM_Core_PseudoConstant::country());
        }

        $result = db_query('SELECT id, name, country_id FROM {civicrm_state_province} WHERE country_id IN (:countries)',
          array(':countries' => $allowedCountries))->fetchAllAssoc('id');

        $state_html = array();
        foreach ($result as $state_id => $state) {
          if (empty($state_html[$state->country_id])) {
            $state_html[$state->country_id] = '';
          }
          $state_html[$state->country_id] .= '<option value="' . $state_id . '">' . $state->name . '</option>';
          if (in_array($state->country_id, $selected_countries)) {
            $loaded_list[$state_id] = $state->name;
          }
        }
        drupal_add_js(array('civicrm_views' => array('states' => $state_html)), 'setting');
        $c_object = json_encode($state_html);
      }
      if ($handler->definition['handler'] == 'civicrm_handler_filter_state_multi') {
        $state = $_GET[$handler->field] ?? NULL;
      }
    }

    // country filter exists, remove options, add js
    if (!empty($country_field)) {
      $this->value_options = $loaded_list;

      $fid = md5($country_field);
      $js = "(function ($) {
               Drupal.behaviors.civicrm_views_{$fid} = {
                 attach: function (context, settings) {
                   if ($('#edit-{$country_field}').val() && !settings.state) {
                      load_state();
                   }
                   function load_state() {
                     var country = $('#edit-{$country_field}');
                     var stateList = '<option value=\"All\">&lt;Any&gt;</option>';
                     var selectedCountries = country.val();
                     // ensure selectedCountries is an array
                     if ($.type(selectedCountries) === 'string') {
                       selectedCountries = [selectedCountries];
                     }
                     $.each(selectedCountries, function(index, selectedCountry) {
                       stateList = stateList + (Drupal.settings.civicrm_views.states[selectedCountry] || '');
                     });
                     $('select[name={$this->field}]').empty().html(stateList);
                   }
                   $('#edit-{$country_field}').change(load_state);
                 }
               }
             })(jQuery);";
      drupal_add_js($js, 'inline', 'footer');
      drupal_add_js(array('state' => $state), 'setting');
    }
  }

  public function operators() {
    $operators = parent::operators();
    $operators += array(
      'all' => array(
        'title' => t('Is all of'),
        'short' => t('all'),
        'method' => 'op_simple',
        'values' => 1,
      ),
    );

    return $operators;
  }

  public function op_simple() {
    if (empty($this->value)) {
      return;
    }

    $this->ensure_my_table();

    // negated operator uses AND, positive uses OR
    $op = $glue = NULL;
    switch ($this->operator) {
      case 'in':
        $op = ' LIKE ';
        $glue = ' OR ';
        break;

      case 'not in':
        $op = ' NOT LIKE ';
        $glue = ' AND ';
        break;

      case 'all':
        $clause = "$this->table_alias.$this->real_field IN (" . implode(',', $this->value) . ")";
        break;
    }

    if ($op) {
      foreach ($this->value as $value) {
        $clauses[] = "$this->table_alias.$this->real_field " . $op . "'%" . $value . "%'";
      }
      $clause = implode($glue, $clauses);
    }

    $this->query->add_where_expression($this->options['group'], $clause);
  }

}
