BuddyPress.org

so here’s a tweaked version and the latest in my custom tab efforts, fyi:

// passes MyClass scope into ajax query for custom Class Year activity filter

function bn_ajax_querystring_activity_filter( $query_string, $object, $filter, $scope, $page, $search_terms, $extras ) {



global $bp;



if ( !is_user_logged_in() || $object != 'activity' )

return $query_string;



$args = array();

parse_str( $query_string, $args );

$args['object'] = $bp->groups->id;



switch ($scope){



case 'myclass':



$slug = "usma-". bp_get_profile_field_data( array('field'=> 'Class Year', 'user_id' => $bp->loggedin_user->id));

$groupid = BP_Groups_Group::get_id_from_slug($slug);

$args['primary_id'] =  $groupid;

break;



case 'mycadetco':



$slug = bp_get_profile_field_data( array('field'=> 'Cadet Company', 'user_id' => $bp->loggedin_user->id));

$groupid = BP_Groups_Group::get_id_from_slug($slug);

$args['primary_id'] =  $groupid;

break;



case 'mybranch':



$slug = sanitize_title(bp_get_profile_field_data( array('field'=> 'Branch', 'user_id' => $bp->loggedin_user->id)));

$groupid = BP_Groups_Group::get_id_from_slug($slug);

$args['primary_id'] =  $groupid;

break;



default:



return $query_string;

}



return http_build_query( $args );

}

add_filter( 'bp_dtheme_ajax_querystring', 'bn_ajax_querystring_activity_filter', 1, 7 );

and the action:

function bn_add_activity_tab() {



if ( !is_user_logged_in() )

return false;

?>

<!-- default item-list-tabs activity-type-tabs



<ul> -->



</div><!-- default item-list-tabs activity-type-tabs -->



<div class="item-list-tabs activity-type-tabs" id="bn-tabs">



</ul>

<ul>

<li id="activity-myclass">

<a>" title="<?php _e( 'Activity for my Class Year', 'buddypress' ) ?>">

<?php printf( __( 'My Class', 'buddypress' ) ) ?>

</a>



<li id="activity-mycadetco">

<a>" title="<?php _e( 'Activity for my Cadet Company', 'buddypress' ) ?>">

<?php printf( __( 'My Cadet Company', 'buddypress' ) ) ?>

</a>



<li id="activity-mybranch">

<a>" title="<?php _e( 'Activity for my Army Branch', 'buddypress' ) ?>">

<?php printf( __( 'My Branch', 'buddypress' ) ) ?>

</a>



<?php

}

add_action( 'bp_activity_type_tabs', 'bn_add_activity_tab', 1, 2 );

A few things to note:

1. use the WP function sanitize_title() if you have a field that might return more than one word e.g. the group ‘Military Police’ returns ‘military police’ but transforms into ‘military-police’ (a pretty slug0 which gives you a correct slug now.

2. I added addl markup to force my new tabs into their own element.

3. Don’t be shy to make suggestions and keep improving this technique. I think many will use it to customize their installs.