Zonit.Extensions 10.0.0-preview.15

Zonit.Extensions

Framework-agnostic value-object foundation for the Zonit.Extensions ecosystem. Trim- and AOT-clean, no ASP.NET Core dependency, no DI registration of any kind — you reference the package and name the types.

dotnet add package Zonit.Extensions

There is no AddZonitExtensions(). Anything that tells you to call a setup method for this package is wrong.

Every other Zonit.Extensions.* package depends on this one, so these types are always available once any of them is installed.

What's inside

Everything below is in namespace Zonit.Extensions.

Plus a few utilities:

• BaseException / BaseException<TErrorCode> (also in Zonit.Extensions) — i18n-ready errors that keep key, template and parameters separable.
• Zonit.Extensions.Text — word/sentence counters, reading time, readability, whitespace and smart-quote normalization.
• Zonit.Extensions.Xml — XmlConvertible, a culture-invariant object ↔ XML helper for flat types.
• Zonit.Extensions.Reflection — AssemblyProvider, assembly/type scanning (explicitly not AOT-safe; both methods carry [RequiresUnreferencedCode]).

Sole third-party dependency: Diacritics, used by UrlSlug to fold accented characters.

The shape every value object shares

• readonly struct (Url is a plain struct so it can cache its parsed Uri; Schedule is a readonly record struct)
• Empty static — which is default(T) — plus a HasValue flag. Price, Money and FileSize use Zero instead; Color uses Transparent.
• A hand-written JsonConverter attached with [JsonConverter]: no registration, no reflection, no source-generator context needed on your side.
• A TypeConverter for ASP.NET Core model binding and IConfiguration — except Price and Money, which you bind as decimal.
• IParsable<T> where a string representation makes sense.

The rule that matters most

Constructors and implicit string conversions throw. TryCreate / TryParse do not.

Title t1 = untrustedInput;                    // ArgumentException past 60 characters
Title.TryCreate(untrustedInput, out var t2);  // false, t2 == Title.Empty

And because these are structs, != null compiles and is always true. Test HasValue.

Highlights

Permission — wildcard authorization tokens

Permission read     = "orders.read";
Permission writeAll = "orders.*";

writeAll.Implies(read);                              // true
writeAll.Implies(new Permission("orders"));          // true  — trailing * matches zero tokens
writeAll.Implies(new Permission("orders.read.all")); // false — and only one token

A trailing * matches zero or one token, not the whole subtree. Drives [RequirePermission("orders.read")] in Zonit.Extensions.Auth.

Identity — lightweight actor snapshot

var actor = new Identity(
    id: userId,
    name: new Title("Alice"),
    roles: [new Role("admin")],
    permissions: [new Permission("orders.*")]);

actor.IsInRole(new Role("admin"));    // true
actor.HasPermission("orders.read");   // true (implicit string -> Permission)
actor.HasSnapshot;                    // true

Equality is by Id only, so a hydrated snapshot equals the bare Identity(id) it came from.

Credential — kind auto-detected from the value

new Credential("alice@example.com").Kind;   // CredentialKind.Email
new Credential("+48 600 100 200").Kind;     // CredentialKind.Phone   (Value "+48600100200")
new Credential("alice").Kind;               // CredentialKind.Username
new Credential(Guid.NewGuid()).Kind;        // CredentialKind.Id

Input longer than 254 characters is rejected before any regex runs.

Money — culture-free parsing

var inv = CultureInfo.InvariantCulture;

Price.TryParse("19,99", null, out var a);   // 19.99
Price.TryParse("19.99", null, out var b);   // 19.99  — same value, whatever the host culture
Currency.PLN.Format(19.99m, inv);           // "19.99 zł"   — symbol after
Currency.USD.Format(19.99m, inv);           // "$19.99"     — symbol before
Currency.JPY.Format(1999m, inv);            // "¥1,999"     — 0 decimal digits

Parsing is culture-free by design; formatting is not — Format defaults to CultureInfo.CurrentCulture for the number part, as do Price.ToString() and Money.ToString().

Asset — MIME from the magic bytes, not the file name

byte[] bytes = await File.ReadAllBytesAsync("upload.pdf");
var asset = new Asset(bytes, "upload.pdf");

asset.Signature;      // e.g. SignatureType.Png if the bytes are really a PNG
asset.MediaType;      // "image/png" — the content wins over the extension
asset.OriginalName;   // "upload.pdf" — preserved as supplied
asset.Validate(AssetValidationOptions.Documents()).Errors;
// "File content is 'image/png' but the name 'upload.pdf' claims 'application/pdf'."

Asset takes ownership of the array you pass in — it does not copy. Do not mutate that array afterwards.

Color — OKLCH

Color c = "#3498db";
c.Lighten(0.1).Hex;   // "#58B8FD"
c.CssOklch;           // "oklch(65.31% 0.1347 242.69)"
c.Mix(Color.FromHex("#e74c3c"), 0.5);

Persist Color.Hex, not CssOklch — the OKLCH string does not currently parse back to the same colour.

Persistence

Identity, Organization and Project persist as a single Guid column. Their name/slug/roles snapshot is not stored and is not lazily loaded — after a plain read, HasSnapshot is false. Hydration is an explicit, opt-in call in Zonit.Extensions.Databases; these value objects perform no I/O of their own.

modelBuilder.Entity<Order>()
    .Property(o => o.Author)
    .HasConversion(v => v.Id, id => id == Guid.Empty ? Identity.Empty : new Identity(id));

Note that HasConversion takes an Expression, so the read side cannot contain an out var declaration. String-backed value objects need a small static helper — the full recipe set is in the docs below.

Documentation

The authoritative docs ship inside the package and are installed into a consuming repository's .zonit/extensions/core/ (plus .cursor/rules/, .github/instructions/ and .claude/skills/ when those editors are detected) at build time:

In this repository they live under Instruction/extensions/core/. Disable the install with <ZonitExtInstructions>false</ZonitExtInstructions>.

See also

• Zonit.Extensions.Auth — authorization built on Permission / Role / Identity.
• Zonit.Extensions.Cultures — translations and culture state built on Culture.
• Zonit.Extensions.Organizations — tenant context built on Organization.
• Zonit.Extensions.Projects — project context built on Project.
• Zonit.Extensions.Website — Blazor / ASP.NET Core integration.

License

MIT — see LICENSE.