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.
42 lines • 2.68 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getPrimaryIdentifier = void 0;
const helpful_errors_1 = require("helpful-errors");
const type_fns_1 = require("type-fns");
const assertDomainObjectIsSafeToManipulate_1 = require("../constraints/assertDomainObjectIsSafeToManipulate");
const isOfDomainEntity_1 = require("../instantiation/inherit/isOfDomainEntity");
const isOfDomainEvent_1 = require("../instantiation/inherit/isOfDomainEvent");
const isOfDomainLiteral_1 = require("../instantiation/inherit/isOfDomainLiteral");
const isOfDomainObject_1 = require("../instantiation/inherit/isOfDomainObject");
const DomainEntityPrimaryKeysMustBeDefinedError_1 = require("./DomainEntityPrimaryKeysMustBeDefinedError");
/**
* Extracts an object that identifies the domain object via primary key, for DomainEntity, DomainEvent, or DomainLiteral.
*
* Uses the definition of a DomainEntity, DomainEvent, or DomainLiteral in order to extract the primary key of the dobj, generically.
*/
const getPrimaryIdentifier = (obj) => {
// make sure its an instance of DomainObject
if (!(0, isOfDomainObject_1.isOfDomainObject)(obj))
throw new helpful_errors_1.BadRequestError('getUniqueIdentifier called on object that is not an instance of a DomainObject. Are you sure you instantiated the object? (Related: see `DomainObject.nested`)', { obj });
// make sure that its safe to manipulate
(0, assertDomainObjectIsSafeToManipulate_1.assertDomainObjectIsSafeToManipulate)(obj);
// handle DomainEntity, DomainEvent, and DomainLiteral
if ((0, isOfDomainEntity_1.isOfDomainEntity)(obj) || (0, isOfDomainEvent_1.isOfDomainEvent)(obj) || (0, isOfDomainLiteral_1.isOfDomainLiteral)(obj)) {
const className = obj.constructor.name;
const primaryKeys = obj.constructor.primary;
if (!primaryKeys)
throw new DomainEntityPrimaryKeysMustBeDefinedError_1.DomainEntityPrimaryKeysMustBeDefinedError({
entityName: className,
nameOfFunctionNeededFor: 'getPrimaryIdentifier',
});
const primary = (0, type_fns_1.pick)(obj, primaryKeys.flat());
return Object.keys(primary).length ? primary : undefined; // if no primary found in instance -> undefined
}
// throw error we get here, this is unexpected
throw new helpful_errors_1.UnexpectedCodePathError('unexpected domain object type for getUniqueIdentifier. expected DomainLiteral, DomainEntity, or DomainEvent', {
dobjClass: obj?.constructor?.name,
dobj: obj,
});
};
exports.getPrimaryIdentifier = getPrimaryIdentifier;
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