52 lines
4.3 KiB
Markdown
52 lines
4.3 KiB
Markdown
# Infrastructure
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The shared [Hummingbird](https://github.com/hummingbird-project/hummingbird) toolkit the **Loud** services build on: declarative routing, hardened HTTP middlewares, pre-rendered localized responses, and page and asset scaffolding.
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## Overview
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| Role | Types |
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| --- | --- |
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| Routing | `RouterController`, `RouteCollectionBuilder`, the `addController` extension on `RouterMethods` |
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| Middlewares | `SecurityHeadersMiddleware`, `HTTPSRedirectMiddleware`, `TrailingSlashRedirectMiddleware`, `VaryMiddleware`, `RateLimitMiddleware`, `LocalizationMiddleware`, `NotFoundMiddleware` |
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| Pages and assets | `Page`, `Asset`, `AssetExtension`, `FingerprintAssets` |
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| Link previews | `SocialCard`, its `Image`, and the `Tag` meta tags it derives |
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| Structured data | `StructuredData`, the `Node`, `Property`, and `Value` types of its schema.org graph, and the open `Name` and `Kind` vocabularies |
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| Analytics | `Analytics`, the tracker script `Attribute`s it derives, and the `origin` its preconnect hint targets |
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| Responses | `CachedHTMLResponse`, `LocalizedHTMLCollectionResponse` |
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| Contexts | `LocalizedRequestContext` |
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| Constants | The `HTTPField.Name` header names, `Int.RateLimit` limits, and `String.Security` header values the middlewares default to |
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## Design rules
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The package holds only what every service can reuse. Anything a service owns is injected, never referenced.
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- **No site-specific content.** No page markup, no asset catalog, no `Bundle.module` lookups. What a type needs, it takes as a parameter: the `bundle:` whose String Catalog names the supported languages, the `document:` closure that builds a page for a locale, a `Page` conformer's `metadata` and its optional head concerns (`summary`, `canonicalURL`, `socialCard`, `structuredData`, `analytics`). URLs arrive absolute and fully formed — composing them stays with the page.
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- **Types own their format; `Page` renders generically.** Each head concern derives its own render-ready form — `SocialCard.tags`, `StructuredData.payload`, `Analytics.attributes` — which `Page` applies without knowing the vocabulary. A page's `scripts` and the tracker render as `defer`red head tags, the tracker preceded by a `preconnect` to its cross-origin host.
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- **Services fill the gaps once, via extensions.** A service restores its convenient call sites retroactively — the Website's `*+Defaults` are the pattern. The open schema.org vocabularies work the same way: the package declares the shared `Property.Name` and `Node.Kind` constants, a service adds its own.
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- **Method structs.** Single-operation types such as `FingerprintAssets` take lifetime-fixed configuration in `init` and per-call inputs in `callAsFunction`.
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## Layout
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Sources are split by visibility, then by kind, one type per file:
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```
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Sources/
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├── Public/ public API
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│ ├── Builders/ RouteCollectionBuilder
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│ ├── Enumerations/ AssetExtension
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│ ├── Extensions/ addController, plus the default header names and values
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│ ├── Methods/ FingerprintAssets
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│ ├── Middlewares/ the seven HTTP middlewares
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│ ├── Protocols/ Asset, LocalizedRequestContext, Page, RouterController
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│ ├── Responses/ CachedHTMLResponse, LocalizedHTMLCollectionResponse
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│ └── Types/ Analytics, SocialCard, StructuredData — each nesting its own types in a folder of that name
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└── Internal/
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├── Extensions/ implementation details (the String separators)
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└── Types/ implementation details (FNV1aHash)
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Tests/
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├── Cases/ the test suites, mirroring the Sources/ layout
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├── Catalogs/ the String Catalog fixture, copied verbatim so it loads on Linux
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└── Utils/ stubs (StubAsset, StubPage, …) and the suite Tag constants
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```
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## Testing
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Every suite carries a tag for the kind of API it exercises — `.asset`, `.extension`, `.middleware`, `.protocol`, `.type` — declared in `Tests/Utils/Extensions/Tag+Constants.swift`, so a run can be sliced by kind. A new suite takes the tag matching its subject, or adds one when none fits.
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## Requirements
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- Swift 6.3 toolchain (`swift-tools-version:6.3`).
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- macOS 15, matching the sibling packages. The services deploy to Linux containers; the packages declare no UI platforms.
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