<?php
    /**
     * Implementation of hook_init().
     *calling this hook causes the code below to execute before the page is loaded
     */


    function region_filter_init() {}
     //hook "nodeapi" is called when we are doing something to the node, in this "case" we are "viewing" the node.



    function region_filter_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {

      switch ($op) {

        case 'view':


            if( (arg(1) == 0)){ } //do not execute on homepage. if there are no aruments after the base url in arument one is thedelimagazine.com/argument1, if this is 0 then do nothing.


          else {

            $region = getRegion(); //get current region from deli.mmodule

            $national = 'national'; //store string 'national' in variable

            $count = count($node->taxonomy);//nstores number of key/value pairs in array,  if two terms are selected with the node/post then count == 2

            $terms = array();//initialize terms to array
            foreach($node->taxonomy as $term) {
              $terms[$term->name] = $term->name; //prints array of individual terms




            }


        /*case 1 new england*/

        //if there are less than 9 terms  and more than 2 and new england is in the array redirect to new england
        if( $count < 9 &&  $count > 2 && in_array('newengland', $terms) && $region != 'newengland')
        {
          $link = 'http://newengland.thedelimagazine.com/' . drupal_get_path_alias("node/$node->nid", $path_language = '');
              drupal_goto($link, $query = NULL, $fragment = NULL, $http_response_code = 301);
        }
        /*END case 1 new england*/



          /*case 2*/
              if($count == 2 && in_array('national', $terms) && is_numeric(arg(1))) { //if there are 2 terms in taxonomy && national is one of them & the first argument in url is a number such as thedelimagazine.com/12345 (before alias redirect)
              unset($terms['national']);        //remove national from array
              $value = array_shift($terms) ;//set value to the other term left. in array
              if($value == 'los angeles') {//fix for los angelas, because in deli module taxonomy term and subdomain are different only for los angeles
                $value = 'la';
              }

              if($region != $value) { //if region does not already = term (would cause redirect loop)

                  $link = 'http://' . $value . '.thedelimagazine.com/' . drupal_get_path_alias("node/$node->nid", $path_language = '');//go to term left in $value

                  drupal_goto($link, $query = NULL, $fragment = NULL, $http_response_code = 301);//drupal redirect function
              }
            }

            /* ++ END case 2++*/


            /* ++case 3 national+++*/
            else {

        if($count > 10  && in_array('national', $terms)  && $region != 'national' ) {    //if there are moer than 10 terms and national is in the array $terms, and the current region does not already =national
              $link = 'http://national.thedelimagazine.com/' . drupal_get_path_alias("node/$node->nid", $path_language = '');//then set $link to national.thedelimagazine.com.  drupl get path alias gets the path to the node and node id and converts it to clean readable urls that i implemented last year.
              drupal_goto($link, $query = NULL, $fragment = NULL, $http_response_code = 301);     //go to the $link
        }
             /* ++ END case 3 national++*/



             }
         }
          break;
      }
    }

function region_filter_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {

      switch ($op) {

        case 'view':


            if( (arg(1) == 0)){ } //do not execute on homepage. if there are no aruments after the base url in arument one is thedelimagazine.com/argument1, if this is 0 then do nothing.

else {

            $region = getRegion(); //get current region from deli.mmodule

            $national = 'national'; //store string 'national' in variable

$count = count($node->taxonomy);//nstores number of key/value pairs in array,  if two terms are selected with the node/post then count == 2

            $terms = array();//initialize terms to array
            foreach($node->taxonomy as $term) {
              $terms[$term->name] = $term->name; //prints array of individual terms




            }

/*case 1 new england*/

        //if there are less than 9 terms  and more than 2 and new england is in the array redirect to new england
        if( $count < 9 &&  $count > 2 && in_array('newengland', $terms) && $region != 'newengland')

{
          $link = 'http://newengland.thedelimagazine.com/' . drupal_get_path_alias("node/$node->nid", $path_language = '');
              drupal_goto($link, $query = NULL, $fragment = NULL, $http_response_code = 301);

/*case 2*/
              if($count == 2 && in_array('national', $terms) && is_numeric(arg(1))) { //if there are 2 terms in taxonomy && national is one of them & the first argument in url is a number such as thedelimagazine.com/12345 (before alias redirect)

unset($terms['national']);        //remove national from array
              $value = array_shift($terms) ;//set value to the other term left. in array
              if($value == 'los angeles') {//fix for los angelas, because in deli module taxonomy term and subdomain are different only for los angeles

$value = 'la';
              }

              if($region != $value) { //if region does not already = term (would cause redirect loop)

$link = 'http://' . $value . '.thedelimagazine.com/' . drupal_get_path_alias("node/$node->nid", $path_language = '');//go to term left in $value

                  drupal_goto($link, $query = NULL, $fragment = NULL, $http_response_code = 301);//drupal redirect function

/* ++ END case 2++*/


            /* ++case 3 national+++*/
            else {

        if($count > 10  && in_array('national', $terms)  && $region != 'national' ) {    //if there are moer than 10 terms and national is in the array $terms, and the current region does not already =national
              $link = 'http://national.thedelimagazine.com/' . drupal_get_path_alias("node/$node->nid", $path_language = '');//then set $link to national.thedelimagazine.com.  drupl get path alias gets the path to the node and node id and converts it to clean readable urls that i implemented last year.
              drupal_goto($link, $query = NULL, $fragment = NULL, $http_response_code = 301);     //go to the $link
        }
             /* ++ END case 3 national++*/



             }
         }
          break;
      }
    }

<?php
    // return the region that the user should be on for this node
    function determine_region($node)
    {

        $taxonomy_count = count($node->taxonomy);

        // I doubt this is neccesary, I don't know what
        // $node->taxonomy is, but perhaps you can use that rather
        // then copying the data into an array.
        $terms = array();
        foreach($node->taxonomy as $term) {
            $terms[$term->name] = $term->name;
        }

        // I really have no idea what the logic behind the region is
        if($taxonomy_count == 2 && in_array('national', $terms) && is_numeric(arg(1)))
        {
            $region = array_shift($terms);
            // los ageneles needs special case
            if($region == "los angeles")
            {
                $region = 'la';
            }
            return $region;
        }
        else if($taxonomy_count > 2 && $taxonomy_count < 9 && in_array('newengland', $terms)
        {
            return 'newengland';
        }
        else if($taxonomy_count > 10 &&  in_array('national', $terms) )
        {
            return 'national';
        }
        else
        {
            // none of the cases fit, we'll just keep the current region
            return getRegion();
        }

    }

    // redirect the user to a particular region and node
    function send_redirect($region, $node)
    {
        $link = 'http://' . $region . '.thedelimagazine.com/' . drupal_get_path_alias("node/$node->nid", $path_language = '');//go to term left in $value
        drupal_goto($link, $query = NULL, $fragment = NULL, $http_response_code = 301);
    }

    function region_filter_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
        // if viewing something other then the home page, consider redirecting
        if($op == 'view' && arg(1) != 0)
        {
            $correct_region = determine_region($node);
            // redirect to correct region if necessary.
            if( getRegion() != $correct_region )
            {
                send_redirect($correct_region, $node);
            }
        }
    }
?>