31 lines
1.5 KiB
Markdown
31 lines
1.5 KiB
Markdown
# Utility
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The general-purpose helpers the **Loud** services share: small, single-purpose methods with no dependencies beyond Foundation and no ties to any web framework.
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## Overview
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| Role | Types |
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| --- | --- |
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| Validation | `NormalizeEmail`, which reduces a submitted email address to its canonical form |
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## Design rules
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- **Dependency-free.** A helper belongs here only while it needs nothing beyond Foundation; one that grows a framework dependency belongs in the package owning that framework's concerns (e.g. `Infrastructure` for Hummingbird).
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- **Method structs.** Helpers hold their lifetime-fixed configuration in `init` and take only 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/
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└── Methods/ NormalizeEmail
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Tests/
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├── Cases/ the test suites, mirroring the Sources/ layout
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└── Utils/ 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 — `.method`, declared in `Tests/Utils/Extensions/Tag+Constants.swift` — so test plans and summaries can slice a run by kind. A new suite adopts 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 carry no UI platforms).
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- No package dependencies — Foundation only.
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