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<?php
// $Id$

/**
 * @file
 * Support for ArcGIS into GMap.
 *
 * This module implements support for ArcGIS API into a GMap.
 */

/**
 * Implementation of hook_gmap().
 */
function gmap_arcgis_gmap($op, &$map) {
  if ($op == 'pre_theme_map') {
    /**
     * Use $map to change and add custom overlays into
     * a given map instance.
     */
    if (isset($map['arcgis'])) {
      /**
       * Make sure that shapes js code are loaded.
       *
       * This is needed as a workaround to the current GMap
       * module that doesn't add shapes js if $map['shapes']
       * wasn't previously defined.
       */
      if (!empty($map['shapes'])) {
        $gmap_path = drupal_get_path('module', 'gmap') .'/js/';
        drupal_add_js($gmap_path .'shapeloader_static.js');
        drupal_add_js($gmap_path .'gmap_shapes.js');
      }

      /**
       * The order to load the following js code is important.
       */

      // Add Google js API
      $key    = variable_get('googlemap_api_key', '');
      $script = '<script type="text/javascript" ';
      drupal_set_html_head($script .'src="http://www.google.com/jsapi?key='. $key .'"></script>');

      // Add ArcGIS js API
      drupal_set_html_head($script .'src="http://serverapi.arcgisonline.com/jsapi/gmaps/?v=1.4"></script>');

      // Setup Map Id
      drupal_add_js(array('gmap_arcgis' => array('id' => $map['id'])), 'setting');

      /**
       * Setup polygons and labels. Labels have the following format:
       *
       *   $map['arcgis']['labels'] = array($layer1 [, $layer2 [,... $layerN]]);
       *
       * Where $layer is
       *
       *   $layer = array($layer_uri, $fields, $content, $icon);
       *
       * Where $layer_uri is a MapService layer, $fields is an array with
       * a pair of layer fields to pass to the query, $content is a string
       * with the content to display for each marker and $icon is an array
       * with parameteres from a GIcon class
       *
       *   $icon = array($shadow, $image, $info_size, $shadow_size,
       *                 $info_anchor, $info_window_anchor);
       *
       * For more info on the GIcon class, see
       * http://code.google.com/intl/pt-BR/apis/maps/documentation/reference.html#GIcon
       *
       * Example:
       *
       *   $labels = array(
       *       array("http://mapservice/layer1", array('id', 'name'), array(
       *           NULL, 'http://path/to/icon.png',
       *           array(20, 34), array(37, 34), array(9, 34), array(9, 2)
       *           )
       *         ),
       *       array("http://mapservice/layer2"),
       *   );
       */
      if (isset($map['arcgis']['polygons'])) {
        drupal_add_js(array('gmap_arcgis' => array('polygons' => $map['arcgis']['polygons'])), 'setting');
      }
      if (isset($map['arcgis']['labels'])) {
        drupal_add_js(array('gmap_arcgis' => array('labels'   => $map['arcgis']['labels'])),   'setting');
      }

      // Add custom js
      $gmap_arcgis_path = drupal_get_path('module', 'gmap_arcgis') .'/';
      drupal_add_js($gmap_arcgis_path .'gmap_arcgis.js');
    }
  }
}