Adding extension links to sitemap

Other extensions can add their links to sitemap using tm_seohtmlsitemap_prepare_custom_links event. Here is example how its done in Highlight extension:

1. add event listener in config.xml in frontend section:

   <events>
       <tm_seohtmlsitemap_prepare_custom_links>
           <observers>
               <highlight>
                   <class>highlight/observer</class>
                   <method>addLinks</method>
               </highlight>
           </observers>
       </tm_seohtmlsitemap_prepare_custom_links>
   </events>
   

2. create observer in Model/Observer.php:

   <?php
   class TM_Highlight_Model_Observer
   {
       /**
        * Add Highlight links to HTML Sitemap
        *
        * @param Varien_Event_Observer $observer
        * @return TM_Highlight_Model_Observer
        */
       public function addLinks($observer)
       {
           $links = $observer->getLinks();
           $pages = Mage::helper('highlight')->getPages();
           $links->addData($pages);
           return $this;
       }
   }
   

3. in helper you can add module specific code to get links array:

   <?php
   public function getPages()
   {
       $pages = array();
       // module specific code to get pages
       return $pages;
   }
   

   It should generate array in the following format:

   array(
       [link_1] => array(
           [name] => Link Text,
           [url] => Link URL
       ),
       [link_2] => array(
           [name] => Link Text,
           [url] => Link URL
       ),
       ...
   )
   

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