javier
b6f9633420
This PR contains the work done to refactor the _Localization_ package and tidy the project a little bit. To provider further details about the work: * The `Negotiate` function was moved to the _Localization_ package. * The `WebsiteRequestContext` context no longer resolves a default language at creation; it starts empty and relies on the `LocalizationMiddleware` middleware to fill it in. * Fixed the local dependency path to Packages/Localization for the **Website** package as it only resolved inside the Xcode workspace before, breaking swift build, the Makefile, and the Docker build). * Updated the `README` file to document language negotiation, the GET /health route, and the full middleware chain; doc comments across the moved/renamed types were brought back in sync with the code. Reviewed-on: rock-n-code/loud-amsterdam#11 Co-authored-by: Javier Cicchelli <javier@rock-n-code.com> Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>
57 lines
1.8 KiB
Swift
57 lines
1.8 KiB
Swift
import HTTPTypes
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import Hummingbird
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import Localization
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/// Resolves the visitor's preferred language and records it on the request context.
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///
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/// Placed ahead of the localized responders in the middleware chain, it reads the request's
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/// `Accept-Language` header, negotiates the best supported match (falling back to the default
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/// language), and stores it on the context's ``LocalizedRequestContext/language``.
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///
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/// The request is otherwise passed through untouched — the URL and routing are not affected — so
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/// each page is served at its existing path and varies its content by header.
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public struct LocalizationMiddleware<Context: LocalizedRequestContext> {
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// MARK: Properties
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/// Negotiates the request's language from its `Accept-Language` header.
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private let negotiate: Negotiate
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// MARK: Initializers
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/// Creates a localization middleware that negotiates against the module's String Catalog languages.
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public init() {
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self.negotiate = .init(bundle: .module)
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}
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}
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// MARK: - RouterMiddleware
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extension LocalizationMiddleware: RouterMiddleware {
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// MARK: Functions
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/// Negotiates the request's language and records it on the context before passing it down.
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/// - Parameters:
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/// - request: the incoming request.
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/// - context: the context the request is resolved against.
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/// - next: the next responder in the middleware chain.
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/// - Returns: the downstream response.
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/// - Throws: any error thrown downstream.
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public func handle(
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_ request: Request,
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context: Context,
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next: (Request, Context) async throws -> Response
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) async throws -> Response {
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var context = context
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context.language = negotiate(
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acceptLanguage: request.headers[.acceptLanguage]
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)
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return try await next(request, context)
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}
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}
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