CZK implemented

src/controllers/admin_currencies.rs

@@ -0,0 +1,92 @@
+//! Admin management of the alternative display currencies.
+//!
+//! EUR is the base/transaction currency and is shown read-only for context. The
+//! admin sets each alternative currency's exchange rate (units per 1 EUR) and
+//! toggles whether buyers may switch to it. The currencies themselves are fixed
+//! and seeded by `initializers::currency_seeder`.
+
+use axum_extra::extract::cookie::CookieJar;
+use loco_rs::prelude::*;
+use sea_orm::{ActiveModelTrait, EntityTrait, QueryOrder, Set};
+use serde::Deserialize;
+use serde_json::json;
+
+use crate::{
+    controllers::i18n::current_lang,
+    models::currencies,
+    shared::{
+        currency::{self, BASE_CODE, BASE_SYMBOL},
+        guard,
+    },
+};
+
+#[derive(Debug, Deserialize)]
+struct CurrencyForm {
+    rate: String,
+    enabled: Option<String>,
+}
+
+fn is_checked(value: &Option<String>) -> bool {
+    matches!(value.as_deref(), Some("on" | "true" | "1"))
+}
+
+#[debug_handler]
+async fn index(
+    auth: auth::JWT,
+    jar: CookieJar,
+    ViewEngine(v): ViewEngine<TeraView>,
+    State(ctx): State<AppContext>,
+) -> Result<Response> {
+    guard::current_admin(auth, &ctx).await?;
+    let rows = currencies::Entity::find()
+        .order_by_asc(currencies::Column::Code)
+        .all(&ctx.db)
+        .await?;
+    let currencies_json: Vec<serde_json::Value> = rows
+        .iter()
+        .map(|c| {
+            json!({
+                "id": c.id,
+                "code": c.code,
+                "symbol": c.symbol,
+                "rate": currency::format_rate(c.rate_e4),
+                "enabled": c.enabled,
+            })
+        })
+        .collect();
+    format::view(
+        &v,
+        "admin/currencies/index.html",
+        json!({
+            "base_code": BASE_CODE,
+            "base_symbol": BASE_SYMBOL,
+            "currencies": currencies_json,
+            "lang": current_lang(&jar),
+        }),
+    )
+}
+
+#[debug_handler]
+async fn update(
+    auth: auth::JWT,
+    Path(id): Path<i32>,
+    State(ctx): State<AppContext>,
+    Form(form): Form<CurrencyForm>,
+) -> Result<Response> {
+    guard::current_admin(auth, &ctx).await?;
+    let row = currencies::Entity::find_by_id(id)
+        .one(&ctx.db)
+        .await?
+        .ok_or_else(|| Error::NotFound)?;
+    let mut active = row.into_active_model();
+    active.rate_e4 = Set(currency::parse_rate(&form.rate)?);
+    active.enabled = Set(is_checked(&form.enabled));
+    active.update(&ctx.db).await?;
+    format::redirect("/admin/currencies")
+}
+
+pub fn routes() -> Routes {
+    Routes::new()
+        .add("/admin/currencies", get(index))
+        .add("/admin/currencies/{id}", post(update))
+}