initial commit of gitara site

src/initializers/view_engine.rs

@@ -0,0 +1,46 @@
+use async_trait::async_trait;
+use axum::{Extension, Router as AxumRouter};
+use fluent_templates::{ArcLoader, FluentLoader};
+use loco_rs::{
+    app::{AppContext, Initializer},
+    controller::views::{engines, ViewEngine},
+    Error, Result,
+};
+use tracing::info;
+
+const I18N_DIR: &str = "assets/i18n";
+// Kept outside `I18N_DIR`: fluent-templates >=0.13 scans top-level *.ftl files
+// in that dir as locales, and "shared" parses as a langid, so a shared.ftl
+// living there would be loaded twice and fail with a duplicate-resource error.
+const I18N_SHARED: &str = "assets/i18n_shared/shared.ftl";
+#[allow(clippy::module_name_repetitions)]
+pub struct ViewEngineInitializer;
+
+#[async_trait]
+impl Initializer for ViewEngineInitializer {
+    fn name(&self) -> String {
+        "view-engine".to_string()
+    }
+
+    async fn after_routes(&self, router: AxumRouter, _ctx: &AppContext) -> Result<AxumRouter> {
+        let tera_engine = if std::path::Path::new(I18N_DIR).exists() {
+            let arc = std::sync::Arc::new(
+                ArcLoader::builder(&I18N_DIR, unic_langid::langid!("sk"))
+                    .shared_resources(Some(&[I18N_SHARED.into()]))
+                    .customize(|bundle| bundle.set_use_isolating(false))
+                    .build()
+                    .map_err(|e| Error::string(&e.to_string()))?,
+            );
+            info!("locales loaded");
+
+            engines::TeraView::build()?.post_process(move |tera| {
+                tera.register_function("t", FluentLoader::new(arc.clone()));
+                Ok(())
+            })?
+        } else {
+            engines::TeraView::build()?
+        };
+
+        Ok(router.layer(Extension(ViewEngine::from(tera_engine))))
+    }
+}