# ZB.MOM.WW.Configuration

Startup configuration-validation library for the **ZB.MOM.WW SCADA family** (OtOpcUa, MxAccessGateway, ScadaBridge). These are **libraries, not a service** — the package is linked directly into the consuming application at build time. There is no central validation process; all validation runs in-process at startup.

The library normalizes the three-project configuration-validation surface: a failure-accumulating `IValidateOptions` base, reusable rule primitives, a bind+validate+`ValidateOnStart` DI extension, and a pre-host `ConfigPreflight` aggregator for raw `IConfiguration` — so the plumbing is written once and domain rules stay per-project.

**Built at 0.1.0. Adopted by OtOpcUa, MxAccessGateway, and ScadaBridge on 2026-06-01** (local default branches; not yet pushed to remotes). Adoption tracked in `~/Desktop/scadaproj/components/configuration/GAPS.md`.

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## Package

| Package | Responsibilities | Key Dependencies |
|---|---|---|
| `ZB.MOM.WW.Configuration` | `OptionsValidatorBase<TOptions>` (abstract `IValidateOptions` base, failure-accumulating), `ValidationBuilder` (rule primitives: `Required`, `Port`, `HostPort`, `PositiveTimeSpan`, `OneOf`, `MinCount`, `RequireThat`, `Add`), `ServiceCollectionExtensions.AddValidatedOptions` (bind + validator + `ValidateOnStart` in one call), `ConfigPreflight` (fluent pre-host raw-`IConfiguration` checker). | `Microsoft.Extensions.Options`, `Microsoft.Extensions.Options.ConfigurationExtensions`, `Microsoft.Extensions.Configuration.Abstractions`, `Microsoft.Extensions.DependencyInjection.Abstractions` |

Single package; no ASP.NET Core framework reference.

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## Build, test, and pack commands

```bash
# From ZB.MOM.WW.Configuration/

# Build
dotnet build ZB.MOM.WW.Configuration.slnx

# Test (no external dependencies required)
dotnet test ZB.MOM.WW.Configuration.slnx

# Pack (one .nupkg lands in artifacts/)
dotnet pack ZB.MOM.WW.Configuration.slnx -c Release -o ./artifacts
```

Test breakdown:

| Assembly | Tests |
|---|---|
| `ZB.MOM.WW.Configuration.Tests` | 27 |
| **Total** | **27** |

`GeneratePackageOnBuild` is off — pack explicitly with the command above.

---

## Source layout

```
ZB.MOM.WW.Configuration/
├── Directory.Build.props          # version (0.1.0), TFM (net10.0), central package mgmt
├── Directory.Packages.props       # pinned package versions
├── ZB.MOM.WW.Configuration.slnx   # solution file
├── src/
│   └── ZB.MOM.WW.Configuration/   # library project
│       ├── OptionsValidatorBase.cs
│       ├── ValidationBuilder.cs
│       ├── Checks.cs                 # internal shared rule wording
│       ├── ServiceCollectionExtensions.cs
│       └── ConfigPreflight.cs
└── tests/
    └── ZB.MOM.WW.Configuration.Tests/   # xUnit test project (27 tests)
```

---

## Status

Part of the **scadaproj component-normalization family** — this is the configuration + validation component. Built at **0.1.0**. **Adopted by OtOpcUa, MxAccessGateway, and ScadaBridge on 2026-06-01** (local default branches; not yet pushed to remotes) — per-app result is tracked in:

- `~/Desktop/scadaproj/components/configuration/GAPS.md`

Design documentation:

- `~/Desktop/scadaproj/components/configuration/spec/SPEC.md` — normalized validation target
- `~/Desktop/scadaproj/components/configuration/shared-contract/ZB.MOM.WW.Configuration.md` — proposed shared-library API
- `~/Desktop/scadaproj/components/configuration/current-state/` — per-project current state (code-verified)