101 lines
3.1 KiB
JavaScript
101 lines
3.1 KiB
JavaScript
"use strict";
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import { Logger } from "@ethersproject/logger";
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import { version } from "./_version";
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const logger = new Logger(version);
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export function defineReadOnly(object, name, value) {
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Object.defineProperty(object, name, {
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enumerable: true,
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value: value,
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writable: false,
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});
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}
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// Crawl up the constructor chain to find a static method
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export function getStatic(ctor, key) {
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for (let i = 0; i < 32; i++) {
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if (ctor[key]) {
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return ctor[key];
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}
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if (!ctor.prototype || typeof (ctor.prototype) !== "object") {
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break;
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}
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ctor = Object.getPrototypeOf(ctor.prototype).constructor;
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}
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return null;
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}
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export function resolveProperties(object) {
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let promises = Object.keys(object).map((key) => {
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let value = object[key];
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if (!(value instanceof Promise)) {
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return Promise.resolve({ key: key, value: value });
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}
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return value.then((value) => {
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return { key: key, value: value };
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});
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});
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return Promise.all(promises).then((results) => {
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let result = {};
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return results.reduce((accum, result) => {
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accum[result.key] = result.value;
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return accum;
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}, result);
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});
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}
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export function checkProperties(object, properties) {
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if (!object || typeof (object) !== "object") {
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logger.throwArgumentError("invalid object", "object", object);
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}
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Object.keys(object).forEach((key) => {
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if (!properties[key]) {
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logger.throwArgumentError("invalid object key - " + key, "transaction:" + key, object);
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}
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});
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}
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export function shallowCopy(object) {
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let result = {};
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for (let key in object) {
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result[key] = object[key];
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}
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return result;
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}
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let opaque = { bigint: true, boolean: true, number: true, string: true };
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// Returns a new copy of object, such that no properties may be replaced.
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// New properties may be added only to objects.
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export function deepCopy(object) {
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// Opaque objects are not mutable, so safe to copy by assignment
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if (object === undefined || object === null || opaque[typeof (object)]) {
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return object;
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}
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// Arrays are mutable, so we need to create a copy
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if (Array.isArray(object)) {
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return Object.freeze(object.map((item) => deepCopy(item)));
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}
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if (typeof (object) === "object") {
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// Immutable objects are safe to just use
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if (Object.isFrozen(object)) {
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return object;
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}
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let result = {};
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for (let key in object) {
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let value = object[key];
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if (value === undefined) {
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continue;
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}
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defineReadOnly(result, key, deepCopy(value));
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}
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return result;
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}
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// The function type is also immutable, so safe to copy by assignment
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if (typeof (object) === "function") {
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return object;
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}
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throw new Error("Cannot deepCopy " + typeof (object));
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}
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export class Description {
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constructor(info) {
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for (let key in info) {
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this[key] = deepCopy(info[key]);
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}
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Object.freeze(this);
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}
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}
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