BuddyPress.org

Forgive me if I’m just making a mistake, I’ve never tried what you’re suggesting, in the link you sent me, it asks me to go to this directory,

/bp-templates/bp-legacy/buddypress/

But when I go there, there’s no Template file to copy, just more folders.

Thoughts?

For the moment, as a temporary fix, I have completely removed the Notifications.php file from

public_html/wp-content/plugins/buddypress/bp-templates/bp-legacy/buddypress/members/single/notifications.php

Found the culprit and the fix here in case anyone encounters the same issue: https://codex.buddypress.org/themes/buddypress-companion-stylesheets/#existing-styled-themes

I am using the theme Matheson, but I tested it on Twenty Ten with all plugins deactivated except BuddyPress and it still happens.

Thanks @danbp ,
I´ll try to explain you:

I have a custom_post_type (celebrities). it real name is “famosos”.
BuddyPressUsers can mark any celebrity as fasvourite.
This part is working fine.
So now, I am trying to send a notification (to users that have marked as favorite certain celebriry) that “today” is that celebrity´s birthday.

For that purpose, I have a SQL query that works fine and gives me an array with budypress user id and the celebritie post id. (this is also working fine)

SO I have to setup a custom notificationa that checks every day that SQL QUery to gets users and celebrities ids to notify user about today´s birthday (of their favourite celebrities)

and this is what I did at first:

define( 'BP_ACTIVITY_CELBIRTHDAY_SLUG', 'celbirthday_notifier' );
function celbirthday_notifier_setup_globals () {
	
	$bp = buddypress();
	
	$bp->celbirthday_notifier = new stdClass();
	$bp->celbirthday_notifier->id = 'celbirthday_notifier'; //I asume others are not going to use this is
	$bp->celbirthday_notifier->slug = BP_ACTIVITY_CELBIRTHDAY_SLUG;
	$bp->celbirthday_notifier->notification_callback = 'celbirthday_notifier_format_notifications'; //show the notification
	
	$bp->active_components[$bp->celbirthday_notifier->id] = $bp->celbirthday_notifier->id;

	do_action( 'celbirthday_notifier_setup_globals' );
}

add_action( 'bp_setup_globals', 'celbirthday_notifier_setup_globals' );

and then try to format the notification:

function celbirthday_notifier_format_notifications( $action, $item_id, $secondary_item_id, $total_items, $format = 'string' ) {
 if ( 'new_birthday' === $action ) {
                $famoso_name =  get_the_title( $secondary_item_id );
		$subject = 'Celebrity birthday';
		$message = 'Say happy birthday to $famoso_name';
		$content = 'Tody is $famoso_name birthday .....somethin else ';
		if ( (int) $total_items > 1 ) {
          $text = sprintf( __( 'You have %d celebrities birthday', 'bbpress' ), (int) $total_items );
          $filter = 'bp_activity_at_message_notification_message';
      } else {
          if ( !empty( $secondary_item_id ) ) {
              //nada
          } else {
              $text = sprintf( __( 'You have %d new birthday of %s', 'bbpress' ), (int) $total_items, $famoso_name );
          }
          $filter = 'bp_activity_at_message_notification_message';
      }
	 }
      if ( 'string' === $format ) {  //falta definir $famoso_link y mas 
          $return = apply_filters( $filter, '<a href="' . esc_url( $famoso_link ) . '" title="birthday anounce">' . esc_html( $text ) . '</a>', (int) $total_items, $text, $famoso_link );
		// $message = apply_filters( 'bp_activity_at_message_notification_message', $message, $poster_name, $content, $message_link, $settings_link );

} } do_action( 'celbirthday_notifier_format_notifications', $action, $item_id, $secondary_item_id, $total_items );

and then add notification this way:

function buddypress_celebrities_add_notification( $fecha_act,  $famoso_name, $receiver_user_id) 
{    if ( bp_is_active( 'notifications' ) ) { 

	$fecha_act = date("Y-m-d");
	$res_birth = $wpdb->get_results( "SELECT wp_best_favs.user_id, wp_postmeta.post_id
					FROM wp_best_favs
					LEFT JOIN wp_postmeta ON ( wp_postmeta.post_id = wp_best_favs.celeb_ID ) 
					WHERE (
					wp_postmeta.meta_key =  'fecha_na')
					AND (DAY(  <code>wp_postmeta</code>.<code>meta_value</code> ) = DAY(  '$fecha_act' ))					AND (MONTH(  <code>wp_postmeta</code>.<code>meta_value</code> ) = MONTH(  '$fecha_act' )							)
									") ;
			$res_birth = array_filter($res_birth);  
			$matriz = objectToArray($res_birth);  //convertimos el array de objetos en array normal para manejarlo mas facil
			$current_time = bp_core_current_time();
			if(count($matriz)==0) { 
				// está vacío 
				}  else { 
					global $wpdb;
					$bp = buddypress();
					$subject = 'Celebrity birthday';
					$message = '1 Say happy birthday to $famoso_name';
					$content = '2 Say happy birthday to $famoso_name';
					foreach ($matriz as $v1) {
					
						$famoso_id = $v1[post_id];
						$famoso_name = get_the_title ($v1[post_id]);
						$receiver_user_id = $v1[user_id];
						
					$args = array(
							'user_id'           => $receiver_user_id,
							'item_id'           => $famoso_id,
							'secondary_item_id' => $famoso_id,
							'component_name'    => $bp->celbirthday_notifier->id,
							'component_action'  => 'new_birthday',
							'date_notified'     => $current_time,
							'is_new'            => 1,
	       					 );
							 
							 bp_notifications_add_notification( $args );
						 
			}	}  }	} add_action( 'new_birthday', 'buddypress_celebrities_add_notification', 10, 1 );

so far this is what I am trying to do, hope you understand.
Thanks in advance.

thanks @danpb. buddypress is really great!!! thanks again for your advises.