BuddyPress Sync Activities Favourite with Activities Reactions.

bp_activities_sync_favorites.php

<?php
/**
 * BuddyPress Sync Activities Favourite with Activities Reactions.
 * */
add_action( 'bp_init', function() {

    if ( ! function_exists( 'yzar_option' ) ) {
        return;
    }

    // Get the results
    $users = get_users( array( 'fields' => 'id' ) );

    $reactions = new YOUZIFY_AREACTIONS_Query();

    $favorite_reaction_id = yzar_option( 'yz_favorite_reaction_id', 'yz_emoji_1' );

    foreach ( $users as $user_id ) {

        $my_favs = bp_get_user_meta( $user_id, 'bp_favorite_activities', true );

        if ( ! empty( $my_favs ) ) {
            foreach( $my_favs as $activity_id ) {

                $args = array(
                    'emoji_id'      => $favorite_reaction_id,
                    'activity_id'   => $activity_id,
                    'user_id'       => $user_id
                );

                $reactions->save_reaction( $args );

            }
        }

    }

}, 10 );