1 files changed, 55 insertions, 0 deletions
diff --git a/server/src/locale.rs b/server/src/locale.rs
new file mode 100644
index 0000000..6d16c17
--- /dev/null
+++ b/server/src/locale.rs
@@ -0,0 +1,55 @@
+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(lang_from_request(request))) })
+    }
+}
+
+pub(crate) fn lang_from_request(request: &Request) -> Language {
+    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)
+}