tmdb-rs 1.0.4

Async, fully-typed TMDB (API v3 + v4) client with compile-time append_to_response
Documentation 
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use crate::{CountryCode, Date, GuestSessionId, Language, SessionId};

/// a query param value; slices join with commas, as TMDB expects
pub trait ToParam {
    fn to_param(&self) -> String;
}

macro_rules! to_param {
    ($($t:ty),* $(,)?) => {$(
        impl ToParam for $t {
            fn to_param(&self) -> String {
                self.to_string()
            }
        }
    )*};
}

to_param!(
    u32,
    u64,
    i32,
    i64,
    f64,
    bool,
    &str,
    String,
    Date,
    SessionId,
    GuestSessionId,
    crate::endpoints::account::AccountSort,
    crate::endpoints::discover::MovieSort,
    crate::endpoints::find::ExternalSource,
    crate::endpoints::trending::TimeWindow,
    crate::endpoints::discover::TvSort,
);

impl ToParam for Language {
    fn to_param(&self) -> String {
        // TMDB wants 639-1; a few languages only have a 639-3 code
        self.to_639_1().unwrap_or_else(|| self.to_639_3()).into()
    }
}

impl ToParam for CountryCode {
    fn to_param(&self) -> String {
        self.alpha2().into()
    }
}

impl<T: ToParam> ToParam for &[T] {
    fn to_param(&self) -> String {
        self.iter()
            .map(ToParam::to_param)
            .collect::<Vec<_>>()
            .join(",")
    }
}

impl<T: ToParam> ToParam for Vec<T> {
    fn to_param(&self) -> String {
        self.as_slice().to_param()
    }
}