BuddyPress.org

standard disclaimer – i don’t plan on releasing this as a plugin (better suited as a core thing – created a trac ticket already and don’t want to support messing around with the dates outside of the normal scope)

warning: there is no way to auto-revert back the date_recorded for the activity but this will store the date_recorded in the activity meta table for safe keeping (on your own if you want to revert back and moving that date back)

function etiviti_bp_activity_bump_denied_activity_type_check( $type ) {

return in_array($type, array( 'tweet', 'bp_link_comment', 'bp_link_vote', 'joined_group', 'created_group', 'friendship_created', 'friendship_accepted', 'new_member' ) );

}



function etiviti_bp_activity_bump( $comment_id, $params ) {

global $bp, $wpdb;



extract( $params, EXTR_SKIP );



$activity_parent = bp_activity_get_specific( array( 'activity_ids' => $activity_id ) );



//make sure we have something

if ( !$activity_parent = $activity_parent['activities'][0] )

return;



//don't update if certain activity types - remove this if you don't care

if ( etiviti_bp_activity_bump_denied_activity_type_check( $activity_parent->type ) )

return;



//be nice and save the date_recorded

if ( !bp_activity_get_meta( $activity_id, 'bump_date_recorded') )

bp_activity_update_meta( $activity_id, 'bump_date_recorded', $activity_parent->date_recorded );



//naughty but some bug using BP_Activity_Activity and save()  - set the "new" date in order to bump this activity_parent wrap to the top

$wpdb->query( $wpdb->prepare( "UPDATE {$bp->activity->table_name} SET date_recorded = %s WHERE id = %d", gmdate( "Y-m-d H:i:s" ), $activity_id ) );



}

add_action( 'bp_activity_comment_posted', 'etiviti_bp_activity_bump', 1, 2 );

the etiviti_bp_activity_bump_denied_activity_type_check is purely optional – i like to restrict certain activity functions.

i have it working on my test site

http://etivite.com/ (just view the activity stream)

http://etivite.com/groups/buddypress/forum/topic/hack-bump-activity-to-the-top-when-a-comment-reply-is-made/