CZK implemented

src/controllers/currency.rs

@@ -0,0 +1,39 @@
+//! Storefront display-currency switcher.
+//!
+//! Sets the `currency` cookie to the buyer's chosen display currency, then sends
+//! them back where they were. EUR is the base; any other code must name an
+//! enabled row in `currencies` or it falls back to EUR on the next render.
+
+use axum::{
+    http::{header, HeaderMap},
+    response::Redirect,
+};
+use loco_rs::prelude::*;
+use serde::Deserialize;
+
+use crate::controllers::i18n::back_path;
+use crate::shared::currency::{BASE_CODE, COOKIE};
+
+#[derive(Debug, Deserialize)]
+pub struct CurrencyForm {
+    pub currency: String,
+}
+
+#[debug_handler]
+async fn set_currency(headers: HeaderMap, Form(form): Form<CurrencyForm>) -> Result<Response> {
+    // Store the code uppercased; validation against the enabled set happens at
+    // render time (shared::currency::resolve), which falls back to EUR.
+    let code = form.currency.trim().to_uppercase();
+    let code = if code.is_empty() { BASE_CODE.to_string() } else { code };
+    let cookie = format!("{COOKIE}={code}; Path=/; Max-Age=31536000; SameSite=Lax");
+
+    Ok((
+        [(header::SET_COOKIE, cookie)],
+        Redirect::to(&back_path(&headers)),
+    )
+        .into_response())
+}
+
+pub fn routes() -> Routes {
+    Routes::new().add("/currency", post(set_currency))
+}