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ccn/Services/Website/Sources/Library/Internal/Pages/ErrorPage.swift
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javier 6c66ea74cc 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

64 lines
1.7 KiB
Swift

import Elementary
import Foundation
import Localization
/// The HTML page rendered for a not-found response, with its text localized to a given locale.
struct ErrorPage: HTMLDocument, Sendable {
// MARK: Properties
/// The locale the page content is localized to.
private let locale: Locale
/// Resolves the page's text from the bundled String Catalog for the page's ``locale``.
private let localize: Localize
// MARK: Initializers
/// Creates a not-found page localized to the given locale.
/// - Parameter locale: the locale the page content is localized to.
init(
locale: Locale
) {
self.locale = locale
self.localize = .init(bundle: .module)
}
// MARK: Document
/// The page's content: a localized heading and explanatory message.
var body: some HTML {
h1 {
localize("error.heading", locale: locale)
}
p {
localize("error.message", locale: locale)
}
}
/// The metadata and stylesheet link placed in the document head.
var head: some HTML {
meta(.charset(.utf8))
meta(
.name(.viewport),
.content("width=device-width, initial-scale=1")
)
link(
.rel(.stylesheet),
.href("/css/error.css")
)
}
/// The document language, derived from the page's locale and falling back to the default language.
var lang: String {
locale.language.languageCode?.identifier
?? LanguageList(bundle: .module).default
}
/// The localized document title.
var title: String {
localize("error.title", locale: locale)
}
}