initial commit of gitara site

src/controllers/i18n.rs

@@ -0,0 +1,63 @@
+use axum::{
+    http::{header, HeaderMap},
+    response::Redirect,
+};
+use loco_rs::prelude::*;
+use serde::Deserialize;
+
+pub const LANG_COOKIE: &str = "lang";
+
+#[derive(Debug, Deserialize)]
+pub struct LangForm {
+    pub lang: String,
+}
+
+pub fn current_lang(jar: &axum_extra::extract::cookie::CookieJar) -> String {
+    match jar
+        .get(LANG_COOKIE)
+        .map(|cookie| cookie.value().to_string())
+    {
+        Some(ref lang) if lang == "en" => "en".to_string(),
+        _ => "sk".to_string(),
+    }
+}
+
+#[debug_handler]
+async fn set_lang(headers: HeaderMap, Form(form): Form<LangForm>) -> Result<Response> {
+    let lang = if form.lang == "en" { "en" } else { "sk" };
+    let cookie = format!("{LANG_COOKIE}={lang}; Path=/; Max-Age=31536000; SameSite=Lax");
+
+    Ok((
+        [(header::SET_COOKIE, cookie)],
+        Redirect::to(&back_path(&headers)),
+    )
+        .into_response())
+}
+
+fn back_path(headers: &HeaderMap) -> String {
+    let raw = headers
+        .get(header::REFERER)
+        .and_then(|value| value.to_str().ok())
+        .unwrap_or("/");
+
+    if raw.starts_with('/') {
+        return raw.to_string();
+    }
+
+    if let Some(after_scheme) = raw.split_once("://").map(|(_, rest)| rest) {
+        if let Some(path_start) = after_scheme.find('/') {
+            let path = &after_scheme[path_start..];
+            return if path.starts_with('/') {
+                path.to_string()
+            } else {
+                "/".to_string()
+            };
+        }
+    }
+
+    "/".to_string()
+}
+
+pub fn routes() -> Routes {
+    Routes::new().add("/lang", post(set_lang))
+}