Location Filtering BP

add_action( 'bp_members_directory_order_options', 'mycred_pro_add_sorting_options' );
function mycred_pro_add_sorting_options() {
    if(is_user_logged_in()):
    ?>
        <option value="points-asc">Distance: Closest to me</option>
        <option value="points-desc">Distance: Farthest from me</option>
    <?php
    endif;
}

add_action( 'bp_pre_user_query', 'mycred_pro_pre_user_query' );
function mycred_pro_pre_user_query( $BP_User_Query ) {
    // Only run this if one of our custom options is selected
    if ( in_array( $BP_User_Query->query_vars['type'], array( 'points-asc', 'points-desc' ) ) ) {
        global $wpdb, $scope;

        // Adjust SELECT
        $BP_User_Query->uid_clauses['select'] = "
            select distinct um.user_id, um.meta_value as latitude, um2.meta_value as longitude
            from wp_usermeta as um
            left join wp_usermeta as um2 on um.user_id=um2.user_id and um2.meta_key = 'geo_long'
            ";

        // Adjust WHERE
        $BP_User_Query->uid_clauses['where'] = "WHERE um.meta_key='geo_lat'";

        //Additional Custom WHERE
        if(bp_current_action() == 'my-friends'){
            $friends_list = friends_get_friend_user_ids( bp_loggedin_user_id(), false, true );

            foreach($friends_list as $friend):
                $ids_to_include[] = $friend['user_id'];
            endforeach;

        }else{
            $ids_to_include = explode("=", $scope);
            $ids_to_include = explode(",",$ids_to_include[1]);
        }

        $ids_string = "";

        $ids_to_include = array_diff($ids_to_include, array(bp_loggedin_user_id()));
        $id_count = 0;

        foreach($ids_to_include as $id){
            if($id == ""){
                continue;
            }else{
                if($id_count == 0)
                    $ids_string .= " AND (um.user_id = ".$id;
                else
                    $ids_string .= " OR um.user_id = ".$id;

                $id_count++;
            }
        }
        if($ids_string != "")
            $ids_string .= ")";

        $BP_User_Query->uid_clauses['where'] .= $ids_string;

        // Adjust ORDER BY
        $BP_User_Query->uid_clauses['orderby'] = "ORDER BY (((acos(sin((".get_user_meta(get_current_user_id(), "geo_lat",true)."*pi()/180)) * sin((latitude*pi()/180))+cos((".get_user_meta(get_current_user_id(), "geo_lat",true)."*pi()/180)) * cos((latitude*pi()/180)) * cos(((".get_user_meta(get_current_user_id(), "geo_long",true)."- longitude)*pi()/180))))*180/pi())*60*1.1515)";

        // Adjust ORDER
        $BP_User_Query->uid_clauses['order'] = ( $BP_User_Query->query_vars['type'] == 'points-asc' ) ? 'ASC' : 'DESC';

    }
}


function getDistanceBetweenPointsNew($latitude1, $longitude1, $latitude2, $longitude2, $unit = 'Mi') {
     $theta = $longitude1 - $longitude2;
     $distance = (sin(deg2rad($latitude1)) * sin(deg2rad($latitude2))) + (cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * cos(deg2rad($theta)));
     $distance = acos($distance);
     $distance = rad2deg($distance);
     $distance = $distance * 60 * 1.1515; switch($unit) {
          case 'Mi': break; case 'Km' : $distance = $distance * 1.609344;
     }
     return (round($distance,2));
}

function set_lat_long( $field_id, $value ){
    global $bp;

    if($field_id == 36){
    $url = "http://maps.googleapis.com/maps/api/geocode/json?address=".$value."&sensor=false";

    $response = wp_remote_get($url);
    $geodata = json_decode($response['body'], true);

    $lat = $geodata["results"][0]["geometry"]["location"]["lat"];
    $long = $geodata["results"][0]["geometry"]["location"]["lng"];
    update_user_meta($bp->displayed_user->id, "geo_lat", $lat);
    update_user_meta($bp->displayed_user->id, "geo_long", $long);
    }
}

add_action( 'xprofile_profile_field_data_updated', 'set_lat_long', 1, 2 );

//Credit: Godavid33 :)