<?php
/* $Id: gmap_overlays.module,v 1.4 2008-09-30 21:53:47 bdragon Exp $ */
// vim:set ft=php:

/**
 * @file
 * Misc. overlays for GMap.
 */


/**
 * Implementation of hook_gmap().
 */
function gmap_overlays_gmap($op, &$map) {
  switch ($op) {
    case 'pre_theme_map':
      if (isset($map['overlay']) && is_array($map['overlay'])) {
        $path = drupal_get_path('module', 'gmap_overlays') .'/js/';
        foreach ($map['overlay'] as $overlay) {
          switch ($overlay['type']) {
            case 'clientsidekml':
              drupal_add_js(drupal_get_path('module', 'gmap_overlays') .'/thirdparty/egeoxml.js');
            case 'kml':
            case 'georss':
              drupal_add_js($path .'overlay_geoxml.js');
              break;
            case 'traffic':
              drupal_add_js($path .'overlay_traffic.js');
              break;
            case 'tile':
              drupal_add_js($path .'overlay_tile.js');
              break;
          }
        }
      }
      else {
        $map['overlay'] = array();
      }
      break;
    case 'macro_multiple':
      return array('overlay');
    case 'parse_macro':
      if (!empty($map['overlay'])) {
        $temp = $map['overlay'];
        $overlays = array();
        foreach ($temp as $overlay) {
          $s = array();
          $cp = strpos($overlay, ':');
          if ($cp !== false) {
            $front = explode('/', substr($overlay, 0, $cp));
            $s['type'] = strtolower($front[0]);
            $rest = substr($overlay, $cp+1);
            switch ($s['type']) {
              case 'kml':
              case 'clientsidekml':
              case 'georss':
                // $rest is just the url to fetch.
                $s['url'] = trim($rest);
                break;
              case 'tile':
                $s['options'] = array();
                $s['options']['tileUrlTemplate'] = trim($rest);
                $s['options']['isPng'] = TRUE;
                if ($front[1]) {
                  if ($front[1] == 'gif') {
                    $s['options']['isPng'] = FALSE;
                  }
                  else {
                    $s['options']['opacity'] = (float)$front[1];
                  }
                }
                if ($front[2]) {
                  $s['minZoom'] = (int)$front[2];
                }
                if ($front[3]) {
                  $s['maxZoom'] = (int)$front[3];
                }
                break;
            }
            $overlays[] = $s;
          }
        }
        return array('overlay' => $overlays);
      }
  }
}