1. Куча / Говнокод #25304

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    fn do_get_summary(req: &HttpRequest<AppState>) -> SummaryFuture {
        let token = req.token().expect("ISE: token not verified during AuthMiddleware stage");
    
        let datetime = req.match_info()
            .get("timestamp")
            .and_then(|s| i64::from_str(s).ok())
            .map(|ts| NaiveDateTime::from_timestamp(ts, 0));
    
        let datetime = match datetime {
            Some(dt) => dt,
            None => return Box::new(future::result(Err(ServiceError::InvalidSetting {
                key: "timestamp".into(),
                hint: "local time in seconds since Unix Epoch".into()
            }.into())))
        };
    
        let db = req.state().db.clone();
    
        let settings = req.state().db
            .send(db::GetSettings(token.clone()))
            .map_err(failure::Error::from)
            // flatten error
            .and_then(|res| match res {
                Ok(settings) => Ok(settings),
                Err(err) => Err(err)
            });
    
        let fitbit = req.state().db
            .send(db::GetSettingsFitbit(token))
            .map_err(failure::Error::from)
            // Check if there is token and flatten error
            .and_then(|res| match res {
                Ok(fitbit) => {
                    if fitbit.client_token.is_none() {
                        Err(ServiceError::TokenExpired.into())
                    } else {
                        Ok(fitbit)
                    }
                },
                Err(err) => Err(err)
            });
    
        let headmaster = req.state().headmaster.clone();
    
        let summary_and_token = settings.join(fitbit)
            .and_then(move |(settings, fitbit)| -> Box<dyn Future<Item = (Summary, FitbitToken), Error = failure::Error>> {
                // Deserialize token
                let token = fitbit.client_token.expect("ISE: token option is not cleared");
                let fitbit_token = match FitbitToken::from_json(&token) {
                    Ok(token) => token,
                    Err(err) => return Box::new(future::err(ServiceError::TokenExpired.into()))
                };
    
                let headmaster_config = master::HeadmasterConfig {
                    minimum_active_time: settings.hourly_activity_goal,
                    max_accounted_active_minutes: settings.hourly_activity_limit.unwrap_or(settings.hourly_activity_goal * 3),
                    debt_limit: settings.hourly_debt_limit.unwrap_or(settings.hourly_activity_goal * 3),
                    day_begins_at: settings.day_starts_at,
                    day_ends_at: settings.day_ends_at,
                    day_length: settings.day_length.unwrap_or((settings.day_ends_at.hour() - settings.day_starts_at.hour()) as i32),
                    user_date_time: datetime,
                };
    
                let auth_data = FitbitAuthData {
                    id: fitbit.client_id,
                    secret: fitbit.client_secret,
                    token: fitbit_token,
                };
    
                let future = headmaster.send(master::GetSummary::<FitbitActivityGrabber>::new(headmaster_config, auth_data))
                    .map_err(failure::Error::from)
                    // flatten error
                    .and_then(|res| res);
    
                Box::new(future)
            });
    
        let summary = summary_and_token
            .and_then(move |(summary, fitbit_token)| {
                db.send(db::UpdateSettingsFitbit::new(
                    token, db::models::UpdateFitbitCredentials {
                        client_token: Some(Some(fitbit_token.to_json())),
                        ..Default::default()
                    }))
                    .map_err(failure::Error::from)
                    .and_then(|_| Ok(summary))
            });
    
        Box::new(summary)
    }

    Фьючи в Rust до рефакторинга -- тот еще говнокод

    Запостил: mersinvald, 12 Января 2019

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