I18n fairing

src/i18n.rs

@@ -0,0 +1,42 @@
+use gettextrs::*;
+use rocket::{Data, Request, Rocket, fairing::{Fairing, Info, Kind}};
+
+const ACCEPT_LANG: &'static str = "Accept-Language";
+
+pub struct I18n {
+    domain: &'static str
+}
+
+impl I18n {
+    pub fn new(domain: &'static str) -> I18n {
+        I18n {
+            domain: domain
+        }
+    }
+}
+
+impl Fairing for I18n {
+    fn info(&self) -> Info {
+        Info {
+            name: "Gettext I18n",
+            kind: Kind::Attach | Kind::Request
+        }
+    }
+
+    fn on_attach(&self, rocket: Rocket) -> Result<Rocket, Rocket> {
+        bindtextdomain(self.domain, "/usr/local/share/locale");
+        textdomain(self.domain);
+        Ok(rocket)
+    }
+
+    fn on_request(&self, request: &mut Request, _: &Data) {
+        let lang = request
+            .headers()
+            .get_one(ACCEPT_LANG)
+            .unwrap_or("en")
+            .split(",")
+            .nth(0)
+            .unwrap_or("en");
+        setlocale(LocaleCategory::LcAll, format!("{}.UTF-8", lang.replace("-", "_")));
+    }
+}

src/main.rs

@@ -39,6 +39,7 @@ use std::env;
 
 mod activity_pub;
 mod db_conn;
+mod i18n;
 mod models;
 mod schema;
 mod routes;
@@ -128,5 +129,6 @@ fn main() {
         ])
         .manage(init_pool())
         .attach(Template::fairing())
+        .attach(i18n::I18n::new("plume"))
         .launch();
 }