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domain-objects

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A simple, convenient way to represent domain objects, leverage domain knowledge, and add runtime validation in your code base.

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/** biome-ignore-all lint/suspicious/noExplicitAny: in this file, we depend on `any` to make it generic enough to reuse */ import type { Ref as RefType } from '../reference/Ref.type'; import type { DomainObjectShape, Refable } from '../reference/Refable'; /** * In Domain Driven Design, a Reference is a special type of Domain Literal that represents a reference to another Domain Object. * * A Domain Reference: * - contains only the identifying properties of the referenced object * - is immutable (like all Domain Literals) * - is used to refer to Domain Entities or Domain Events without including their full data * * The purpose of a Domain Reference is to enable lightweight references between domain objects without circular dependencies or data duplication. * * For example: * - A `SeaTurtleRef { uuid: string }` is a reference to a SeaTurtle by its primary key * - A `SeaTurtleRef { seawaterSecurityNumber: string }` is a reference to a SeaTurtle by its unique key * * Note: * - `Ref` is a flexible reference type that accepts either primary or unique key references * - Use `RefByPrimary` or `RefByUnique` when you need to be specific about the reference type */ export type Ref<TDobj extends Refable<TShape, TPrimary, TUnique>, TShape extends DomainObjectShape = any, // todo: update DomainObjectShape -> DomainReferenceableInstance to enable extraction of primary and unique keys via types, when typescript supports constructor inference from instances TPrimary extends readonly string[] = any, TUnique extends readonly string[] = any> = RefType<TDobj, TShape, TPrimary, TUnique>; export declare const Ref: { new <TDobj extends Refable<TShape, TPrimary, TUnique>, TShape extends DomainObjectShape = any, TPrimary extends readonly string[] = any, TUnique extends readonly string[] = any>(props: Ref<TDobj, TShape, TPrimary, TUnique>): Ref<TDobj, TShape, TPrimary, TUnique>; /** * .what = an interface via which to construct instances w/ immute operations * * .why = * - immute operations such as .clone produce more maintainable code by preventing unexpected mutations * - these immute operations provide a safe pit of success for common operations */ build<TDobj extends Refable<TShape, TPrimary, TUnique>, TShape extends DomainObjectShape = any, TPrimary extends readonly string[] = any, TUnique extends readonly string[] = any>(props: Ref<TDobj, TShape, TPrimary, TUnique>): Ref<TDobj, TShape, TPrimary, TUnique>; /** * .what = an interface via which to construct instances w/ immute operations * * .why = * - immute operations such as .clone produce more maintainable code by preventing unexpected mutations * - these immute operations provide a safe pit of success for common operations */ as<TDobj extends Refable<TShape, TPrimary, TUnique>, TShape extends DomainObjectShape = any, TPrimary extends readonly string[] = any, TUnique extends readonly string[] = any>(props: Ref<TDobj, TShape, TPrimary, TUnique>): Ref<TDobj, TShape, TPrimary, TUnique>; };