package fcm import ( "errors" "net/http" ) // Option configurates Client with defined option. type Option func(*Client) error // WithEndpoint returns Option to configure FCM Endpoint. func WithEndpoint(endpoint string) Option { return func(c *Client) error { if endpoint == "" { return errors.New("invalid endpoint") } c.endpoint = endpoint return nil } } // WithHTTPClient returns Option to configure HTTP Client. func WithHTTPClient(httpClient *http.Client) Option { return func(c *Client) error { c.client = httpClient return nil } }