public IActionResult Delete([FromBody] FavRadioStation favRadio)
        {
            var favouriteRadioStationsText = System.IO.File.ReadAllText("favourite-radio-stations.json");
            var stations = string.IsNullOrEmpty(favouriteRadioStationsText) ? new List <string>() : JsonSerializer.Deserialize <List <string> >(favouriteRadioStationsText);

            if (!stations.Contains(favRadio.RadioId))
            {
                return(BadRequest("Station is not in favourites"));
            }

            stations.Remove(favRadio.RadioId);
            var json = JsonSerializer.Serialize(stations);

            System.IO.File.WriteAllText("favourite-radio-stations.json", json);

            return(Ok(stations));
        }
        public IActionResult Post([FromBody] FavRadioStation favRadio)
        {
            if (string.IsNullOrEmpty(favRadio.RadioId))
            {
                return(BadRequest());
            }

            var favouriteRadioStationsText = System.IO.File.ReadAllText("favourite-radio-stations.json");
            var stations = string.IsNullOrEmpty(favouriteRadioStationsText) ? new string[0] : JsonSerializer.Deserialize <string[]>(favouriteRadioStationsText);

            if (stations.Contains(favRadio.RadioId))
            {
                return(BadRequest("Station is already in favourites"));
            }

            var newFavourites = stations.Append(favRadio.RadioId);
            var json          = JsonSerializer.Serialize(newFavourites);

            System.IO.File.WriteAllText("favourite-radio-stations.json", json);

            return(Ok(newFavourites));
        }