Mapress pro : use taxonomies to generate maps

Mappress pro, a plugin for wordpress, is worth its price : it can automatically create maps from custom fields adresses. I needed the possibility to create maps from a specific taxonomy, and this requires some hacking. here's the way to go for serious coders who want, like me, to spend one  intense hour . hope mappress pro incorporates that for future buyers !!

FIRST STEP : create a new configuration option for mappress to specify the custom taxonomy

• in mappress.php

add_setting_field('customTaxonomyMap', __("Custom Taxonomy", 'mappress'), array(&this, 'setTaxonomy'), 'mappress', 'mappress_pro_settings'));

function set_custom_taxonomy_map() {
$options = Mappress_Options::get();
$pro_link = "<a href='http://wphostreviews.com/mappress/mappress-pro' title='MapPress Pro'>MapPress Pro</a>";
printf(__("This setting requires %s.  Automatically create maps from custom taxonomy.", 'mappress'), $pro_link);
}
in mappress_pro.php

• function set_custom_taxonomy_map()
  {        $options = Mappress_Options::get();
      echo __(" Update map when terms are added to a post in the following taxonomy  ", "mappress");
          echo "<input type='text' size='30' name='mappress_options[customTaxonomyMap]' value='"  . $options->customTaxonomyMap. "'/>";}

• and in mappress_api, don't forget to declare your new option as class variable of Mappress_Options
  $customTaxonomyMap=""

SECOND STEP : implement action hooks to create the map when the post is saved

• in mappress_pro.php, function Mappress_Pro()

          if ($options->customTaxonomyMap) {
                  add_action('deleted_term_relationships', array(&$this, 'term_delete'), 10, 4);
                  add_action('added_term_relationship', array(&$this, 'term_added'), 10, 4);
          }

• and

   function getTaxonomyMapKey($taxonomy)
    {
        return "tax" . $taxonomy;
    }
  function term_added($postid, $termId) // poleouest
  {
       $options = Mappress_Options::get();
      $taxonomy=$options->customTaxonomyMap;
      $mapMetaKey=$this->getTaxonomyMapKey($taxonomy);
      $pois=array();
      $this->term_delete($postid, $termId);
      $terms=get_the_terms( $postid, $taxonomy );
        foreach( $terms as $term ) {
            $city=$term->name;
          add_post_meta($postid,"hello",$city);
      if ($city!="")
      {$atts = array("address" => $city);
      $atts = $this->scrub_atts($atts);
  
     $poi = new Mappress_Poi($atts);
     $result = $poi->geocode(true);
     $pois[] = $poi;
      $map = new Mappress_Map();
  
          // Update with new POIs
          $map->update(array('pois' => $pois, 'title' => $city, 'metaKey' =>$mapMetaKey, 'center' => array('lat' => 0, 'lng' => 0)));
          $map->save($postid);
      }
        }
  }
  function term_delete($postid, $termId) // poleouest
  {
       $options = Mappress_Options::get();
      $taxonomy=$options->customTaxonomyMap;
      $mapMetaKey=$this->getTaxonomyMapKey($taxonomy);
       $map = Mappress_Map::get_post_map($postid, null, $mapMetaKey);
     if ($map)  $map->delete();
  }