@decaf-ts/decorator-validation
Version:
simple decorator based validation engine
66 lines • 7.04 kB
JavaScript
import { Model } from "./Model.js";
/**
* @summary Helper Function to override constructors
*
* @template M the model instance type
*
* @param {Function} constructor
* @param {any[]} [args]
* @return {M} the new instance
*
* @function construct
* @memberOf module:decorator-validation
*/
export function construct(constructor, ...args) {
const _constr = (...argz) => new constructor(...argz);
_constr.prototype = constructor.prototype;
return _constr(...args);
}
/**
* @summary Recursively finds the last prototype before Object
* @param {object} obj
*
* @function findLastProtoBeforeObject
* @memberOf module:decorator-validation
*/
export function findLastProtoBeforeObject(obj) {
let prototype = Object.getPrototypeOf(obj);
if (prototype === Object.prototype)
return obj;
while (prototype !== Object.prototype) {
prototype = Object.getPrototypeOf(prototype);
if (prototype === Object.prototype)
return prototype;
if (Object.getPrototypeOf(prototype) === Object.prototype)
return prototype;
}
throw new Error("Could not find proper prototype");
}
/**
* @sumary binds the {@link Model} class as a root prototype of the provided instance
*
* @param {unknown} obj
*
* @function bindModelPrototype
* @memberOf module:decorator-validation
*/
export function bindModelPrototype(obj) {
if (obj instanceof Model)
return;
function bindPrototype(objToOverride, prototype) {
Object.setPrototypeOf(objToOverride, prototype);
}
const prototype = Object.getPrototypeOf(obj);
if (prototype === Object.prototype) {
return bindPrototype(obj, Model.prototype);
}
while (prototype !== Object.prototype) {
const prot = Object.getPrototypeOf(prototype);
if (prot === Object.prototype ||
Object.getPrototypeOf(prot) === Object.prototype) {
return bindPrototype(prototype, Model.prototype);
}
}
throw new Error("Could not find proper prototype to bind");
}
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