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path: root/server/src/routes/locale.rs
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use jellybase::locale::Language;
use rocket::{
    outcome::Outcome,
    request::{self, FromRequest},
    Request,
};
use std::ops::Deref;

pub struct AcceptLanguage(pub Language);
impl Deref for AcceptLanguage {
    type Target = Language;
    fn deref(&self) -> &Self::Target {
        &self.0
    }
}
impl<'r> FromRequest<'r> for AcceptLanguage {
    type Error = ();

    fn from_request<'life0, 'async_trait>(
        request: &'r Request<'life0>,
    ) -> ::core::pin::Pin<
        Box<
            dyn ::core::future::Future<Output = request::Outcome<Self, Self::Error>>
                + ::core::marker::Send
                + 'async_trait,
        >,
    >
    where
        'r: 'async_trait,
        'life0: 'async_trait,
        Self: 'async_trait,
    {
        Box::pin(async move {
            Outcome::Success(AcceptLanguage(
                request
                    .headers()
                    .get_one("accept-language")
                    .and_then(|h| {
                        h.split(",")
                            .filter_map(|e| {
                                let code = e.split(";").next()?;
                                let code = code.split_once("-").unwrap_or((code, "")).0;
                                match code {
                                    "en" => Some(Language::English),
                                    "de" => Some(Language::German),
                                    _ => None,
                                }
                            })
                            .next()
                    })
                    .unwrap_or(Language::English),
            ))
        })
    }
}