use rocket::{
    Request,
    request::{self, FromRequest},
};

/// Represents contextual information about an HTTP request.
pub struct RequestContext {
    /// A flag indicating if the request is an HTMX request.
    ///
    /// This is determined by checking the presence of the `HX-Request` header.
    pub is_htmx: bool,
}

#[rocket::async_trait]
impl<'r> FromRequest<'r> for RequestContext {
    type Error = ();

    async fn from_request(req: &'r Request<'_>) -> request::Outcome<Self, Self::Error> {
        rocket::outcome::Outcome::Success(RequestContext {
            is_htmx: !req
                .headers()
                .get("HX-Request")
                .collect::<Vec<&str>>()
                .is_empty(),
        })
    }
}