<?php

/**
 * @file
 * Defines location field type.
 */

/**
 * Implementation of hook_theme().
 */
function location_cck_theme() {
  return array(
    'location_cck_formatter_default' => array(
      'arguments' => array('element' => NULL),
    ),
    'location_cck_formatter_all' => array(
      'arguments' => array('element' => NULL),
    ),
    'location_cck_formatter_map' => array(
      'arguments' => array('element' => NULL),
    ),
    'location_cck_formatter_multiple' => array(
      'arguments' => array('element' => NULL),
    ),
    'location_cck_formatter_multiple_all' => array(
      'arguments' => array('element' => NULL),
    ),
    'location_cck_field_map' => array(
      'arguments' => array('locations' => NULL, 'field' => NULL),
    ),
    'location_cck_field_popup' => array(
      'arguments' => array('location' => NULL, 'field' => NULL),
    ),
  );
}

/**
 * Implementation of hook_field_info().
 */
function location_cck_field_info() {
  return array(
    'location' => array(
      'label' => t('Location'),
      'description' => t('Store a location.module location.'),
    ),
  );
}

/**
 * Implementation of hook_field_settings().
 */
function location_cck_field_settings($op, $field) {
  switch ($op) {
    case 'form':
      $form = array();
      $settings = isset($field['location_settings']) ? $field['location_settings'] : FALSE;
      $form['location_settings'] = location_settings($settings);

      // Multiple is handled by CCK.
      unset ($form['location_settings']['multiple']);
      // CCK handles weight, and collapsibility is not changeable.
      unset ($form['location_settings']['form']['weight']);
      unset ($form['location_settings']['form']['collapsible']);
      unset ($form['location_settings']['form']['collapsed']);
      unset ($form['location_settings']['display']['weight']);

      // We want to see the settings, so uncollapse them.
      $form['location_settings']['#collapsible'] = FALSE;
      $form['location_settings']['form']['#collapsed'] = FALSE;
      $form['location_settings']['display']['#collapsed'] = FALSE;

      // Add some GMap settings, if GMap is enabled.
      if (module_exists('gmap')) {
        $form['gmap_macro'] = array(
          '#type' => 'textarea',
          '#title' => t('GMap Macro'),
          '#rows' => 2,
          '#maxlength' => 500,
          '#description' => t('A macro to be used as a base map for this field.  This map will be recentered on the location, so the center is not that important.'),
          '#default_value' => !empty($field['gmap_macro']) ? $field['gmap_macro'] : '[gmap ]',
        );
        $options = gmap_get_marker_titles();
        $form['gmap_marker'] = array(
          '#type' => 'select',
          '#title' => t('GMap marker'),
          '#options' => $options,
          '#default_value' => !empty($field['gmap_marker']) ? $field['gmap_marker'] : 'drupal',
        );
      }
      else {
        // Preserve existing data, apply defaults even if gmap is disabled.
        $form['gmap_macro'] = array(
          '#type' => 'value',
          '#value' => !empty($field['gmap_macro']) ? $field['gmap_macro'] : '[gmap ]',
        );
        $form['gmap_marker'] = array(
          '#type' => 'value',
          '#value' => !empty($field['gmap_marker']) ? $field['gmap_marker'] : 'drupal',
        );
      }
      return $form;

    case 'save':
      return array('location_settings', 'gmap_macro', 'gmap_marker');

    case 'database columns':
      return array(
        'lid' => array(
          'type' => 'int',
          'unsigned' => TRUE,
          'not null' => FALSE,
        ),
      );

    case 'views data':
      // We want to for the most part use the CCK stuff, but we also want to
      // patch in a relationship so location's views support can target
      // cck fields directly.
      $table = content_views_tablename($field);
      $db_info = content_database_info($field);
      $field_alias = $db_info['columns']['lid']['column'];
      $data = content_views_field_views_data($field);
      $data[$table][$field_alias]['relationship'] = array(
        'base' => 'location',
        'field' => $field_alias,
        'handler' => 'views_handler_relationship',
        'label' => t('Location'), // @@@ Some sort of better name?
      );
      return $data;
  }
}

/**
 * Implementation of hook_field().
 */
function location_cck_field($op, &$node, $field, &$items, $teaser, $page) {
  switch ($op) {

    case 'insert':
    case 'update':
      // Store instances of locations by field name and vid.
      $criteria = array(
        'genid' => 'cck:'. $field['field_name'] .':'. $node->vid,
        'vid' => $node->vid,
        'nid' => $node->nid,
      );
      location_save_locations($items, $criteria);
      // CCK automatically picks up the new lids and stores them in its own tables.
      break;

    case 'load':
      $locations = array();
      // Locations are being cached by CCK now. Load the full location.
      foreach ($items as $item) {
        $locations[] = location_load_location($item['lid']);
      }
      return array($field['field_name'] => $locations);

    case 'sanitize':
      // Get the location information for the lid if it hasn't already been
      // loaded (in the hook_field() load $op using location_load_location()).
      // This is necessary for Views and any other modules that use the
      // content_format() function to render CCK fields because content_format()
      // doesn't call the "load" $op.
      foreach ($items as $delta => $item) {
        if (!isset($item['latitude'])) {
          $items[$delta] = array_merge(location_load_location($item['lid']), $items[$delta]);
        }
      }
      break;

    case 'delete':
      // Use the CCK storage to figure out the vids that need to be deleted,
      // and clean up all the applicable references.
      $db_info = content_database_info($field);
      $result = db_query('SELECT vid FROM {'. $db_info['table'] .'} WHERE nid = %d', $node->nid);
      while ($row = db_fetch_object($result)) {
        $genid = 'cck:'. $field['field_name'] .':'. $row->vid;
        $locs = array();
        location_save_locations($locs, array('genid' => $genid));
      }
      break;

    case 'delete revision':
      $genid = 'cck:'. $field['field_name'] .':'. $node->vid;
      $locs = array();
      location_save_locations($locs, array('genid' => $genid));
      break;
  }
}

/**
 * Implementation of hook_field_formatter_info().
 */
function location_cck_field_formatter_info() {
  $info = array(
    'default' => array(
      'label' => t('Default (address)'),
      'field types' => array('location'),
    ),
  );
  if (module_exists('gmap')) {
    $info['all'] = array(
      'label' => t('Address with map'),
      'field types' => array('location'),
    );
    $info['map'] = array(
      'label' => t('Map only'),
      'field types' => array('location'),
    );
    $info['multiple'] = array(
      'label' => t('Multiple field values on a single map'),
      'field types' => array('location'),
      'multiple values' => CONTENT_HANDLE_MODULE,
    );
    $info['multiple_all'] = array(
      'label' => t('Addresses with multiple field values on a single map'),
      'field types' => array('location'),
      'multiple values' => CONTENT_HANDLE_MODULE,
    );
  }
  return $info;
}

/**
 * Implementation of hook_widget_info().
 */
function location_cck_widget_info() {
  return array(
    'location' => array(
      'label' => t('Location Field'),
      'field types' => array('location'),
      // Location will set its own custom values.
      'callbacks' => array(
        //'default value' => CONTENT_CALLBACK_MODULE,
      ),
    ),
  );
}

/**
 * Implementation of hook_widget().
 */
function location_cck_widget(&$form, &$form_state, $field, $items, $delta = 0) {
  if ($field['widget']['type'] == 'location') {
    $settings = $field['location_settings'];

    // Load location data for existing locations.
    if (isset($items[$delta]['lid']) && $items[$delta]['lid']) {
      // Are we in a node preview?
      // If we aren't, then we only have the lid, because that's all cck
      // actually knows about internally. So, we have to pull in the location
      // at this point.
      if (empty($items[$delta]['cck_preview_in_progress'])) {
        $location = location_load_location($items[$delta]['lid']);
      }
      else {
        // Otherwise, the data was already populated and we're running
        // off the form state.
        $location = $items[$delta];
      }
    }
    // Load location data passed by cck.
    else if (isset($items[$delta]) && is_array($items[$delta]) && !empty($items[$delta])) {

      // Initialize empty location.
      $location = location_empty_location($settings);
      foreach ($items[$delta] as $k => $v) {
        $location[$k] = $v;
      }
      // We can't trust that CCK is giving us the right information.
      // It can't tell us whether $items is defaults or multistep values.
      // Location *needs* the defaults to match the initial field values,
      // so we re-calculate the defaults here and stash them into the settings.
      // @@@ There is still a bug here!
      // If you go back and edit something, and you hadn't set a location the
      // first time, CCK fails to set up the defaults properly!
      // I'm just going to leave it like that for now, because I don't know how
      // to work around it.
      $temp = content_default_value($form, $form_state, $field, 0);
      if (is_array($temp) && isset($temp[$delta]) && is_array($temp[$delta])) {
        foreach ($temp[$delta] as $k => $v) {
          $settings['form']['fields'][$k]['default'] = $v;
        }
      }
//      unset($location['location_settings']);
//      unset($location['locpick']);
    }

    $element = array(
      '#type' => 'location_element',
      '#title' => t($field['widget']['label']),
      '#description' => t($field['widget']['description']),
      '#required' => $field['required'],
      '#location_settings' => $settings,
      '#default_value' => $location,
    );
    // This is used to determine whether we are in a preview or not, because
    // several pieces of code work differently when previewing.
    $element['cck_preview_in_progress'] = array(
      '#type' => 'value',
      '#value' => TRUE,
    );
    return $element;
  }
}

/**
 * CCK Emptiness check.
 */
function location_cck_content_is_empty($item, $field) {
  $fields = array();
  if (location_is_empty($item, $fields)) {
    return TRUE;
  }
  return FALSE;
}

/**
 * Return an address for an individual item.
 */
function theme_location_cck_formatter_default($element) {
  $field = content_fields($element['#field_name'], $element['#type_name']);
  $hide = (isset($field['location_settings']['display']['hide'])) ? array_keys(array_filter($field['location_settings']['display']['hide'])) : array();
  $location = $element['#item'];
  if (!empty($location['cck_preview_in_progress'])) {
    // Our canary field is in place, we are in a node preview.
    $fields = array();
    // If the location isn't "empty", then theme it based on the current state
    // of the item.
    if (!location_is_empty($location, $fields)) {
      return theme('location', $location, $hide);
    }
  }
  else if (isset($location['lid']) && $location['lid']) {
    // "normal" viewing.
    // Location is already cached by CCK, so no need to load it.
    return theme('location', $location, $hide);
  }
}

/**
 * Return both an address and a map for an individual item.
 */
function theme_location_cck_formatter_all($element) {
  $content = '';
  $field = content_fields($element['#field_name'], $element['#type_name']);
  $hide = (isset($field['location_settings']['display']['hide'])) ? array_keys(array_filter($field['location_settings']['display']['hide'])) : array();
  $location = $element['#item'];
  if (!empty($location['cck_preview_in_progress'])) {
    // Our canary field is in place, we are in a node preview.
    $fields = array();
    // If the location isn't "empty", then theme it based on the current state
    // of the item.
    if (!location_is_empty($location, $fields)) {
      $content = theme('location', $location, $hide);
    }
  }
  else if (isset($location['lid']) && $location['lid']) {
    // "normal" viewing.
    // Location is already cached by CCK, so no need to load it.
    $content = theme('location', $location, $hide);
  }
  $content .= theme_location_cck_field_map(array($location), $field);
  return $content;
}

/**
 * Returns a map for an individual field value.
 */
function theme_location_cck_formatter_map($element) {
  $field = content_fields($element['#field_name'], $element['#type_name']);
  $location = $element['#item'];
  return theme_location_cck_field_map(array($location), $field);
}

/**
 * Alternate function to return a map with all
 * multiple values in the same map.
 */
function theme_location_cck_formatter_multiple($element) {
  $field = content_fields($element['#field_name'], $element['#type_name']);
  $locations = array();
  foreach (element_children($element) as $key) {
    $locations[$key] = $element[$key]['#item'];
  }
  return theme_location_cck_field_map($locations, $field);
}

/**
 * Return both a addresses and a single map with all location items.
 */
function theme_location_cck_formatter_multiple_all($element) {
  $content = '';
  $field = content_fields($element['#field_name'], $element['#type_name']);
  $hide = (isset($field['location_settings']['display']['hide'])) ? array_keys(array_filter($field['location_settings']['display']['hide'])) : array();
  $locations = array();
  foreach (element_children($element) as $key) {
    $location = $element[$key]['#item'];
    $locations[$key] = $location;
    if (!empty($location['cck_preview_in_progress'])) {
      // Our canary field is in place, we are in a node preview.
      $fields = array();
      // If the location isn't "empty", then theme it based on the current state
      // of the item.
      if (!location_is_empty($location, $fields)) {
        $content .= theme('location', $location, $hide);
      }
    }
    else if (isset($location['lid']) && $location['lid']) {
      // "normal" viewing.
      // Location is already cached by CCK, so no need to load it.
      $content .= theme('location', $location, $hide);
    }
  }
  $content .= theme_location_cck_field_map($locations, $field);
  return $content;
}

/**
 * Generate a GMap map for one or more location field values.
 *
 * Mostly just cut and paste from gmap_location
 * block view.
 */
function theme_location_cck_field_map($locations, $field) {
  $count = 0;
  $content = '';
  foreach ($locations as $location) {
    if (location_has_coordinates($location)) {
      $count++;
      $markername = isset($field['gmap_marker']) ? $field['gmap_marker'] : 'drupal';
      $markers[] = array(
        'latitude' => $location['latitude'],
        'longitude' => $location['longitude'],
        'markername' => $markername,
        'offset' => $count-1,
        'text' => theme('location_cck_field_popup', $location, $field),
      );
    }
  }
  if (!empty($markers)) {
    $macro = !empty($field['gmap_macro']) ? $field['gmap_macro'] : '[gmap ]';
    $map = gmap_parse_macro($macro);
    $map['latitude'] = $markers[0]['latitude'];
    $map['longitude'] = $markers[0]['longitude'];
    $map['markers'] = $markers;
    $map['id'] = gmap_get_auto_mapid();
    $content = theme('gmap', array('#settings' => $map));
  }
  return $content;
}

/**
 * Theme the GMap popup text for the field.
 */
function theme_location_cck_field_popup($location, $field) {
  $hide = (isset($field['location_settings']['display']['hide'])) ? array_keys(array_filter($field['location_settings']['display']['hide'])) : array();
  // Don't use a map link in a popup!
  // We're making the name into a title.
  $hide[] = 'map_link';
  $hide[] = 'name';

  $markertitle = $field['widget']['label'];
  if (!empty($location['name'])) {
    $markertitle = $location['name'];
  }
  return '<h4>'. $markertitle .'</h4>'. theme('location', $location, $hide);
}

/**
 * Implementation of hook_token_list().
 */
function location_cck_token_list($type = 'all') {
  if ($type == 'field') {
    $tokens = array();

    $fields = location_field_names(TRUE);
    // @@@ We really need to rethink fields in location..
    unset($fields['locpick']);
    foreach ($fields as $k => $v) {
      $tokens['location'][$k] = $v;
    }

    return $tokens;
  }
}

/**
 * Implementation of hook_token_values().
 */
function location_cck_token_values($type, $object = NULL) {
  if ($type == 'field') {
    $tokens = array();
    $item = $object[0];
    if ($item['lid']) {
      // If the location exists, we need to set up the tokens.

      $location = array(
        // There is no way to find out which elements to hide because $item does not contain
        // the 'location_settings' element, so for now, just set it to be an empty array.
        // See http://drupal.org/node/463618 for more infomation.
        'hide' => array(),
        'location' => location_load_location($item['lid']),
      );

      // @@@ This is rather silly, but I can't think of anything better at the moment.
      template_preprocess_location($location);

      $fields = location_field_names(TRUE);
      // @@@ We really need to rethink fields in location..
      unset($fields['locpick']);
      foreach ($fields as $k => $v) {
        if (isset($location[$k])) {
          $tokens[$k] = $location[$k];
        }
        else {
          $tokens[$k] = '';
        }
      }
    }
    return $tokens;
  }
}

/**
 * Implementation of hook_locationapi().
 */
function location_cck_locationapi(&$obj, $op, $a3 = NULL, $a4 = NULL, $a5 = NULL) {
  switch ($op) {
    case 'instance_links':
      foreach ($obj as $k => $v) {
        if (substr($v['genid'], 0, 4) == 'cck:') {
          $data = explode(':', $v['genid']);
          $obj[$k]['href'] = 'node/'. $data[2];
          $obj[$k]['title'] = t('CCK location');
          $obj[$k]['type'] = t('CCK location');
        }
      }
  }
}