Localization support for the Website service (#10)

This PR contains the work done to introduce server-side localization support to the **Website** service so the landing and error pages are served in the visitor's negotiated language, backed by a new reusable Localization package. To provide further details about the work: * Created the _Localization_ package — a bundle-bound `Localize` method and a `LanguageList` type. * Language negotiation — `NegotiateLanguage` method picks the best supported language from the request's _Accept-Language_ header (falling back to the default); the `LocalizationMiddleware` middleware resolves it per request and stores it on a new `LocalizedRequestContext` / `WebsiteRequestContext` context. * Localized responses — `LocalizedHTMLCollectionResponse` pre-renders each page once per language and caches the bytes (with `Content-Language` + `Vary: Accept-Language`), reused by the `RootController` controller and `NotFoundMiddleware` middleware. * The `CachedHTMLResponse` response gained custom-header support. * Localized pages — the `IndexPage` and `ErrorPage` pages now resolve their strings via `Localize` method; * Added `Localizable.xcstrings` catalogs. * Wired the `LocalizationMiddleware` middlewaer into the router. Reviewed-on: rock-n-code/loud-amsterdam#10 Co-authored-by: Javier Cicchelli <javier@rock-n-code.com> Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>
2026-06-29 23:08:36 +00:00
parent 847058d642
commit 6c66ea74cc
24 changed files with 858 additions and 49 deletions
@@ -1,4 +1,5 @@
 import Elementary
+import Foundation
 import Testing

@testable import WebsiteCore
@@ -10,11 +11,14 @@ struct ErrorPageTests {

    @Test
    func `renders its markup`() {
-        let html = ErrorPage().render()
+        let html = ErrorPage(
+            locale: .init(identifier: "en")
+        ).render()

        #expect(html.contains("<!DOCTYPE html>"))
+        #expect(html.contains(#"lang="en""#))
        #expect(html.contains("Page Not Found"))
-        #expect(html.contains("does not exist"))
+        #expect(html.contains("Sorry, but the page you were trying to view does not exist."))
        #expect(html.contains("/css/error.css"))
    }