<?php
// $Id: exif_location.module,v 1.1.2.4 2010/10/08 17:57:43 rapsli Exp $

/**
 * implementation of hook_nodeapi
 * @param stdClass $node
 * @param string $op
 * @param string $a3
 * @param string $a4
 */
function exif_location_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
  switch ($op) {
    case 'update':
      //we are only going to update if we have said so
      if (!variable_get('exif_update', TRUE)) {
        break;
      }
    case 'insert':
      $lid = 0;
      /* Go get the location from EXIF fields */
      if (is_array($node->field_gps_gpslongitude) &&
          is_array($node->field_gps_gpslatitude)) {
        $longitude = $node->field_gps_gpslongitude[0]['value'];
        $latitude = $node->field_gps_gpslatitude[0]['value'];
        if (is_array($node->locations) && array_key_exists($lid, $node->locations)) {
          /*
           * We cannot just overwrite existing locations or they will
           * be created and not ammended by the loction module.
           */
          $node->locations[$lid]['longitude'] = $longitude;
          $node->locations[$lid]['latitude'] = $latitude;
        } 
        else {
          $node->locations[$lid] =
            array(
              'longitude' => $longitude,
              'latitude,' => $latitude,
            );
        }
        $lid++;

        /* Remove any other locations */
        while (array_key_exists($lid, $node->locations)) {
          $node->locations[$lid]['longitude'] = '';
          $node->locations[$lid]['latitude'] = '';
          $lid++;
        }
      }
      break;
  }
}

/**
 * Implementation of hook_form_alter
 * @param array $form
 * @param array $form_state
 * @param array $form_id
 */
function exif_location_form_alter(&$form, $form_state, $form_id) {
  /* Comment out the return below to enable this */
  return;
  /* Remove the location element from the node form */
  if (isset($form['#node']) &&
      $form['#node']->type == 'image' &&
      $form_id == $form['#node']->type .'_node_form') {
    $form['locations']['#access'] = FALSE;
  }
}