bp_profile_repeaters_update_field_data( $user_id,  $posted_field_ids,  $errors,  $old_values,  $new_values )

function bp_profile_repeaters_update_field_data ( $user_id, $posted_field_ids, $errors, $old_values, $new_values ) {
    global $wpdb;
    $bp = buddypress();
    
    if ( !empty( $errors ) ) {
        return;
    }
    
    $field_group_id = $wpdb->get_var( $wpdb->prepare( "SELECT group_id FROM {$bp->profile->table_name_fields} WHERE id = %d", $posted_field_ids[ 0 ] ) );
    
    $is_repeater_enabled = 'on' == BP_XProfile_Group::get_group_meta( $field_group_id, 'is_repeater_enabled' ) ? true : false;
    if ( !$is_repeater_enabled ) {
        return;
    }
    
    // First, clear the data for deleted fields, if any
    if ( isset( $_POST['deleted_field_ids'] ) && !empty( $_POST['deleted_field_ids'] ) ) {
        $deleted_field_ids = wp_parse_id_list( $_POST['deleted_field_ids'] );
        foreach ( $deleted_field_ids as $deleted_field_id ) {
            xprofile_delete_field_data( $deleted_field_id, $user_id );
        }
    }
    
    $field_set_sequence = wp_parse_id_list( $_POST['repeater_set_sequence'] );
    
    //We'll take the data from all clone fields and dump it into the main/template field.
    //This is done to ensure that search etc, work smoothly.
    $main_field_data = array();
    
    $counter = 1;
    foreach( (array) $field_set_sequence as $field_set_number ) {
        //Find all fields in this set, take their values and update the data for corresponding fields in set number $counter
        $fields_of_current_set = $wpdb->get_col( 
            "SELECT object_id FROM {$bp->profile->table_name_meta} WHERE meta_key = '_clone_number' AND meta_value = {$field_set_number} "
            . " AND object_id IN (". implode( ',', $posted_field_ids ) .") and object_type = 'field' " 
        );

        if ( !empty( $fields_of_current_set ) && !is_wp_error( $fields_of_current_set ) ) {
            foreach ( $fields_of_current_set as $field_of_current_set ) {
                $cloned_from = $wpdb->get_var( "SELECT meta_value FROM {$bp->profile->table_name_meta} WHERE object_id = {$field_of_current_set} AND meta_key = '_cloned_from' " );
                
                $sql = "SELECT m1.object_id FROM {$bp->profile->table_name_meta} AS m1 JOIN {$bp->profile->table_name_meta} AS m2 ON m1.object_id = m2.object_id " 
                    . " WHERE m1.object_type = 'field' AND m1.meta_key = '_cloned_from' AND m1.meta_value = {$cloned_from} "
                    . " AND m2.meta_key = '_clone_number' AND m2.meta_value = {$counter} ";
                $corresponding_field_id = $wpdb->get_var( $sql );
                if ( !empty( $corresponding_field_id ) ) {
                    $new_data = isset( $new_values[ $field_of_current_set ][ 'value' ] ) ? $new_values[ $field_of_current_set ][ 'value' ] : '';
                    $new_visibility_level = isset( $new_values[ $field_of_current_set ][ 'visibility' ] ) ? $new_values[ $field_of_current_set ][ 'visibility' ] : '';
                    xprofile_set_field_visibility_level( $corresponding_field_id, $user_id, $new_visibility_level );

	                $type = $wpdb->get_var( $wpdb->prepare( "SELECT `type` FROM {$wpdb->prefix}bp_xprofile_fields WHERE id = %d", $corresponding_field_id ) );

	                if ( 'datebox' === $type ) {
		                $new_data = $new_data.' 00:00:00';
	                }
	                xprofile_set_field_data( $corresponding_field_id, $user_id, $new_data );
                    
                    if ( !isset( $main_field_data[ $cloned_from ] ) ) {
                        $main_field_data[ $cloned_from ] = array();
                    }

                    $main_field_data[ $cloned_from ][] = is_array( $new_values[ $field_of_current_set ][ 'value' ] ) ? implode( ' ', $new_values[ $field_of_current_set ][ 'value' ] ) : $new_values[ $field_of_current_set ][ 'value' ];
                }
            }
        }
    
        $counter++;
    }
    
    if ( !empty( $main_field_data ) ) {
        foreach ( $main_field_data as $main_field_id => $values ) {
            $values_str = implode( ' ', $values );
            xprofile_set_field_data( $main_field_id, $user_id, $values_str );
        }
    }
    
    bp_set_profile_field_set_count( $field_group_id, $user_id, count( $field_set_sequence ) );
}