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use crate::traits::IsStation;
use crate::travelynx::TrainRef;
use serde::de::DeserializeOwned;
pub mod iceportal;
pub mod zugportal;
pub fn choose_api(name: &str) -> &dyn OnBoardAPI {
match name {
"iceportal" => &iceportal::Iceportal {} as &dyn OnBoardAPI,
"zugportal" => &zugportal::Zugportal {} as &dyn OnBoardAPI,
_ => panic!("no such API known")
}
}
pub trait OnBoardAPI {
fn apiurl(&self) -> &'static str;
fn request(
&self,
debug: bool
) -> Result<Box<dyn OnBoardInfo>, serde_json::Error>;
}
pub fn request<Api, I>(
api: &Api,
debug: bool
) -> Result<Box<dyn OnBoardInfo>, serde_json::Error>
where
Api: OnBoardAPI,
I: OnBoardInfo + DeserializeOwned + 'static
{
let url: &'static str = api.apiurl();
match get_request::<I>(url) {
Ok(resp) => Ok(Box::new(resp)),
Err((err, resp)) => {
if debug {
eprintln!("{:?}\n\nError was:{:?}", resp, err);
}
Err(err)
}
}
}
pub trait OnBoardInfo {
fn guess_last_station(&self) -> Option<&dyn IsStation>;
fn get_train_ref(&self) -> TrainRef;
fn stops<'a>(
&'a self
) -> Box<dyn std::iter::Iterator<Item = &'a dyn IsStation> + 'a>;
}
fn get_request<R>(uri: &str) -> Result<R, (serde_json::Error, String)>
where
R: serde::de::DeserializeOwned
{
let resp: String = ureq::get(uri)
.call()
.unwrap_or_else(|err| exit_err(&err.to_string(), "get request failed"))
.into_string()
.unwrap_or_else(|err| {
exit_err(&err.to_string(), "get request response failed")
});
match serde_json::from_str::<R>(&resp) {
Ok(obj) => Ok(obj),
Err(err) => Err((err, resp))
}
}
fn exit_err(msg: &str, scope: &str) -> ! {
eprintln!("{}: {}", scope, msg);
std::process::exit(1)
}
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