|
|
import { ICancellable, Constructor } from "./interfaces";
|
|
|
import { Cancellation } from "./Cancellation";
|
|
|
|
|
|
let _nextOid = 0;
|
|
|
const _oid = typeof Symbol === "function" ?
|
|
|
Symbol("__implab__oid__") :
|
|
|
"__implab__oid__";
|
|
|
|
|
|
export function oid(instance: any): string | undefined {
|
|
|
if (isNull(instance))
|
|
|
return undefined;
|
|
|
|
|
|
if (_oid in instance)
|
|
|
return instance[_oid];
|
|
|
else
|
|
|
return (instance[_oid] = "oid_" + (++_nextOid));
|
|
|
}
|
|
|
|
|
|
export function keys<T>(arg: T): (Extract<keyof T, string>)[] {
|
|
|
return isObject(arg) && arg ? Object.keys(arg) as (Extract<keyof T, string>)[] : [];
|
|
|
}
|
|
|
|
|
|
export function argumentNotNull(arg: any, name: string) {
|
|
|
if (arg === null || arg === undefined)
|
|
|
throw new Error("The argument " + name + " can't be null or undefined");
|
|
|
}
|
|
|
|
|
|
export function argumentNotEmptyString(arg: any, name: string) {
|
|
|
if (typeof (arg) !== "string" || !arg.length)
|
|
|
throw new Error("The argument '" + name + "' must be a not empty string");
|
|
|
}
|
|
|
|
|
|
export function argumentNotEmptyArray(arg: any, name: string) {
|
|
|
if (!(arg instanceof Array) || !arg.length)
|
|
|
throw new Error("The argument '" + name + "' must be a not empty array");
|
|
|
}
|
|
|
|
|
|
export function argumentOfType(arg: any, type: Constructor<{}>, name: string) {
|
|
|
if (!(arg instanceof type))
|
|
|
throw new Error("The argument '" + name + "' type doesn't match");
|
|
|
}
|
|
|
|
|
|
export function isObject(val: any): val is object {
|
|
|
return typeof val === "object";
|
|
|
}
|
|
|
|
|
|
export function isNull(val: any) {
|
|
|
return (val === null || val === undefined);
|
|
|
}
|
|
|
|
|
|
export function isPrimitive(val: any): val is string | number | boolean | undefined | null {
|
|
|
return (val === null || val === undefined || typeof (val) === "string" ||
|
|
|
typeof (val) === "number" || typeof (val) === "boolean");
|
|
|
}
|
|
|
|
|
|
export function isInteger(val: any): val is number {
|
|
|
return parseInt(val, 10) === val;
|
|
|
}
|
|
|
|
|
|
export function isNumber(val: any): val is number {
|
|
|
return parseFloat(val) === val;
|
|
|
}
|
|
|
|
|
|
export function isString(val: any): val is string {
|
|
|
return typeof (val) === "string" || val instanceof String;
|
|
|
}
|
|
|
|
|
|
export function isPromise(val: any): val is PromiseLike<any> {
|
|
|
return val && typeof val.then === "function";
|
|
|
}
|
|
|
|
|
|
export function isCancellable(val: any): val is ICancellable {
|
|
|
return val && typeof val.cancel === "function";
|
|
|
}
|
|
|
|
|
|
export function isNullOrEmptyString(val: any): val is (string | null | undefined) {
|
|
|
return (val === null || val === undefined ||
|
|
|
((typeof (val) === "string" || val instanceof String) && val.length === 0))
|
|
|
}
|
|
|
|
|
|
export function isNotEmptyArray(arg: any): arg is Array<any> {
|
|
|
return (arg instanceof Array && arg.length > 0);
|
|
|
}
|
|
|
|
|
|
function _isStrictMode(this: any) {
|
|
|
return !this;
|
|
|
}
|
|
|
|
|
|
function _getNonStrictGlobal(this: any) {
|
|
|
return this;
|
|
|
}
|
|
|
|
|
|
export function getGlobal() {
|
|
|
// in es3 we can't use indirect call to eval, since it will
|
|
|
// be executed in the current call context.
|
|
|
if (!_isStrictMode()) {
|
|
|
return _getNonStrictGlobal();
|
|
|
} else {
|
|
|
// tslint:disable-next-line:no-eval
|
|
|
return eval.call(null, "this");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
export function get(member: string, context?: object) {
|
|
|
argumentNotEmptyString(member, "member");
|
|
|
let that = context || getGlobal();
|
|
|
const parts = member.split(".");
|
|
|
for (const m of parts) {
|
|
|
if (!m)
|
|
|
continue;
|
|
|
if (isNull(that = that[m]))
|
|
|
break;
|
|
|
}
|
|
|
return that;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Выполняет метод для каждого элемента массива, останавливается, когда
|
|
|
* либо достигнут конец массива, либо функция <c>cb</c> вернула
|
|
|
* значение.
|
|
|
*
|
|
|
* @param {Array | Object} obj массив элементов для просмотра
|
|
|
* @param {Function} cb функция, вызываемая для каждого элемента
|
|
|
* @param {Object} thisArg значение, которое будет передано в качестве
|
|
|
* <c>this</c> в <c>cb</c>.
|
|
|
* @returns Результат вызова функции <c>cb</c>, либо <c>undefined</c>
|
|
|
* если достигнут конец массива.
|
|
|
*/
|
|
|
export function each<T>(obj: T, cb: (v: T[keyof T], k: keyof T) => void): void;
|
|
|
export function each(obj: any, cb: any, thisArg?: any): any;
|
|
|
export function each(obj: any, cb: any, thisArg?: any) {
|
|
|
argumentNotNull(cb, "cb");
|
|
|
if (obj instanceof Array) {
|
|
|
for (let i = 0; i < obj.length; i++) {
|
|
|
const x = cb.call(thisArg, obj[i], i);
|
|
|
if (x !== undefined)
|
|
|
return x;
|
|
|
}
|
|
|
} else {
|
|
|
const _keys = Object.keys(obj);
|
|
|
for (const k of _keys) {
|
|
|
const x = cb.call(thisArg, obj[k], k);
|
|
|
if (x !== undefined)
|
|
|
return x;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/** Copies property values from a source object to the destination and returns
|
|
|
* the destination onject.
|
|
|
*
|
|
|
* @param dest The destination object into which properties from the source
|
|
|
* object will be copied.
|
|
|
* @param source The source of values which will be copied to the destination
|
|
|
* object.
|
|
|
* @param template An optional parameter specifies which properties should be
|
|
|
* copied from the source and how to map them to the destination. If the
|
|
|
* template is an array it contains the list of property names to copy from the
|
|
|
* source to the destination. In case of object the templates contains the map
|
|
|
* where keys are property names in the source and the values are property
|
|
|
* names in the destination object. If the template isn't specified then the
|
|
|
* own properties of the source are entirely copied to the destination.
|
|
|
*
|
|
|
*/
|
|
|
export function mixin<T extends object, S extends object>(dest: T, source: S, template?: string[] | object): T & S {
|
|
|
argumentNotNull(dest, "to");
|
|
|
const _res = dest as T & S;
|
|
|
|
|
|
if (isPrimitive(source))
|
|
|
return _res;
|
|
|
|
|
|
if (template instanceof Array) {
|
|
|
for (const p of template) {
|
|
|
if (p in source)
|
|
|
_res[p] = source[p];
|
|
|
}
|
|
|
} else if (template) {
|
|
|
const _keys = Object.keys(source);
|
|
|
for (const p of _keys) {
|
|
|
if (p in template)
|
|
|
_res[template[p]] = source[p];
|
|
|
}
|
|
|
} else {
|
|
|
const keys = Object.keys(source);
|
|
|
for (const p of keys)
|
|
|
_res[p] = source[p];
|
|
|
}
|
|
|
|
|
|
return _res;
|
|
|
}
|
|
|
|
|
|
/** Wraps the specified function to emulate an asynchronous execution.
|
|
|
* @param{Object} thisArg [Optional] Object which will be passed as 'this' to the function.
|
|
|
* @param{Function|String} fn [Required] Function wich will be wrapped.
|
|
|
*/
|
|
|
export function async(_fn: (...args: any[]) => any, thisArg: any): (...args: any[]) => PromiseLike<any> {
|
|
|
let fn = _fn;
|
|
|
|
|
|
if (arguments.length === 2 && !(fn instanceof Function))
|
|
|
fn = thisArg[fn];
|
|
|
|
|
|
if (fn == null)
|
|
|
throw new Error("The function must be specified");
|
|
|
|
|
|
function wrapresult(x, e?): PromiseLike<any> {
|
|
|
if (e) {
|
|
|
return {
|
|
|
then(cb, eb) {
|
|
|
try {
|
|
|
return eb ? wrapresult(eb(e)) : this;
|
|
|
} catch (e2) {
|
|
|
return wrapresult(null, e2);
|
|
|
}
|
|
|
}
|
|
|
};
|
|
|
} else {
|
|
|
if (x && x.then)
|
|
|
return x;
|
|
|
return {
|
|
|
then(cb) {
|
|
|
try {
|
|
|
return cb ? wrapresult(cb(x)) : this;
|
|
|
} catch (e2) {
|
|
|
return wrapresult(e2);
|
|
|
}
|
|
|
}
|
|
|
};
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return (...args) => {
|
|
|
try {
|
|
|
return wrapresult(fn.apply(thisArg, args));
|
|
|
} catch (e) {
|
|
|
return wrapresult(null, e);
|
|
|
}
|
|
|
};
|
|
|
}
|
|
|
|
|
|
type _AnyFn = (...args) => any;
|
|
|
|
|
|
export function delegate<T, K extends keyof T>(target: T, _method: (K | _AnyFn)) {
|
|
|
let method;
|
|
|
if (!(_method instanceof Function)) {
|
|
|
argumentNotNull(target, "target");
|
|
|
method = target[_method];
|
|
|
if (!(method instanceof Function))
|
|
|
throw new Error("'method' argument must be a Function or a method name");
|
|
|
} else {
|
|
|
method = _method;
|
|
|
}
|
|
|
|
|
|
return (...args) => {
|
|
|
return method.apply(target, args);
|
|
|
};
|
|
|
}
|
|
|
|
|
|
export function delay(timeMs: number, ct = Cancellation.none) {
|
|
|
ct.throwIfRequested();
|
|
|
return new Promise((resolve, reject) => {
|
|
|
const h = ct.register(e => {
|
|
|
clearTimeout(id);
|
|
|
reject(e);
|
|
|
// we don't nedd to unregister h, since ct is already disposed
|
|
|
});
|
|
|
const id = setTimeout(() => {
|
|
|
h.destroy();
|
|
|
resolve();
|
|
|
}, timeMs);
|
|
|
|
|
|
});
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Iterates over the specified array of items and calls the callback `cb`, if
|
|
|
* the result of the callback is a promise the next item from the array will be
|
|
|
* proceeded after the promise is resolved.
|
|
|
*
|
|
|
*/
|
|
|
export function pmap<T, T2>(
|
|
|
items: ArrayLike<T> | PromiseLike<ArrayLike<T>>,
|
|
|
cb: (item: T, i: number) => T2 | PromiseLike<T2>
|
|
|
): T2[] | PromiseLike<T2[]> {
|
|
|
argumentNotNull(cb, "cb");
|
|
|
|
|
|
if (isPromise(items)) {
|
|
|
return items.then(data => pmap(data, cb));
|
|
|
} else {
|
|
|
|
|
|
if (isNull(items) || !items.length)
|
|
|
return [];
|
|
|
|
|
|
let i = 0;
|
|
|
const result = new Array<T2>();
|
|
|
|
|
|
const next = (): any => {
|
|
|
while (i < items.length) {
|
|
|
const r = cb(items[i], i);
|
|
|
const ri = i;
|
|
|
i++;
|
|
|
if (isPromise(r)) {
|
|
|
return r.then(x => {
|
|
|
result[ri] = x;
|
|
|
return next();
|
|
|
});
|
|
|
} else {
|
|
|
result[ri] = r;
|
|
|
}
|
|
|
}
|
|
|
return result;
|
|
|
};
|
|
|
|
|
|
return next();
|
|
|
}
|
|
|
}
|
|
|
|
|
|
export function pfor<T>(
|
|
|
items: ArrayLike<T> | PromiseLike<ArrayLike<T>>,
|
|
|
cb: (item: T, i: number) => any
|
|
|
): void | PromiseLike<void> {
|
|
|
argumentNotNull(cb, "cb");
|
|
|
|
|
|
if (isPromise(items)) {
|
|
|
return items.then(data => pfor(data, cb));
|
|
|
} else {
|
|
|
if (isNull(items) || !items.length)
|
|
|
return;
|
|
|
|
|
|
let i = 0;
|
|
|
|
|
|
const next = (): any => {
|
|
|
while (i < items.length) {
|
|
|
const r = cb(items[i], i);
|
|
|
i++;
|
|
|
if (isPromise(r))
|
|
|
return r.then(next);
|
|
|
}
|
|
|
};
|
|
|
|
|
|
return next();
|
|
|
}
|
|
|
}
|
|
|
|
|
|
export function first<T>(sequence: ArrayLike<T>): T;
|
|
|
export function first<T>(sequence: PromiseLike<ArrayLike<T>>): PromiseLike<T>;
|
|
|
export function first<T>(
|
|
|
sequence: ArrayLike<T> | PromiseLike<ArrayLike<T>>,
|
|
|
cb: (x: T) => void,
|
|
|
err?: (x: Error) => void
|
|
|
): void;
|
|
|
/**
|
|
|
* Выбирает первый элемент из последовательности, или обещания, если в
|
|
|
* качестве параметра используется обещание, оно должно вернуть массив.
|
|
|
*
|
|
|
* @param {Function} cb обработчик результата, ему будет передан первый
|
|
|
* элемент последовательности в случае успеха
|
|
|
* @param {Function} err обработчик исключения, если массив пустой, либо
|
|
|
* не массив
|
|
|
*
|
|
|
* @remarks Если не указаны ни cb ни err, тогда функция вернет либо
|
|
|
* обещание, либо первый элемент.
|
|
|
* @async
|
|
|
*/
|
|
|
export function first<T>(
|
|
|
sequence: ArrayLike<T> | PromiseLike<ArrayLike<T>>,
|
|
|
cb?: (x: T) => void,
|
|
|
err?: (x: Error) => void
|
|
|
) {
|
|
|
if (isPromise(sequence)) {
|
|
|
return sequence.then(res => first(res, cb, err));
|
|
|
} else if (sequence && "length" in sequence) {
|
|
|
if (sequence.length === 0) {
|
|
|
if (err)
|
|
|
return err(new Error("The sequence is empty"));
|
|
|
else
|
|
|
throw new Error("The sequence is empty");
|
|
|
} else if (cb) {
|
|
|
return cb(sequence[0]);
|
|
|
} else {
|
|
|
return sequence[0];
|
|
|
}
|
|
|
} else {
|
|
|
if (err)
|
|
|
return err(new Error("The sequence is required"));
|
|
|
else
|
|
|
throw new Error("The sequence is required");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
export function firstWhere<T>(
|
|
|
sequence: ArrayLike<T>,
|
|
|
predicate: (x: T) => boolean
|
|
|
): T;
|
|
|
export function firstWhere<T>(
|
|
|
sequence: PromiseLike<ArrayLike<T>>,
|
|
|
predicate: (x: T) => boolean
|
|
|
): PromiseLike<T>;
|
|
|
export function firstWhere<T>(
|
|
|
sequence: ArrayLike<T> | PromiseLike<ArrayLike<T>>,
|
|
|
predicate: (x: T) => boolean,
|
|
|
cb: (x: T) => void,
|
|
|
err?: (x: Error) => void
|
|
|
): void;
|
|
|
|
|
|
export function firstWhere<T>(
|
|
|
sequence: ArrayLike<T> | PromiseLike<ArrayLike<T>>,
|
|
|
predicate?: (x: T) => boolean,
|
|
|
cb?: (x: T) => any,
|
|
|
err?: (x: Error) => any
|
|
|
) {
|
|
|
if (isPromise(sequence)) {
|
|
|
return sequence.then(res => firstWhere(res, predicate, cb, err));
|
|
|
} else if (sequence && "length" in sequence) {
|
|
|
if (sequence.length === 0) {
|
|
|
if (err)
|
|
|
err(new Error("The sequence is empty"));
|
|
|
else
|
|
|
throw new Error("The sequence is empty");
|
|
|
} else {
|
|
|
if (!predicate) {
|
|
|
return cb ? cb(sequence[0]) && void (0) : sequence[0];
|
|
|
} else {
|
|
|
for (let i = 0; i < sequence.length; i++) {
|
|
|
const v = sequence[i];
|
|
|
if (predicate(v))
|
|
|
return cb ? cb(v) : v;
|
|
|
}
|
|
|
if (err)
|
|
|
err(new Error("The sequence doesn't contain matching items"));
|
|
|
else
|
|
|
throw new Error("The sequence doesn't contain matching items");
|
|
|
}
|
|
|
}
|
|
|
} else {
|
|
|
if (err)
|
|
|
err(new Error("The sequence is required"));
|
|
|
else
|
|
|
throw new Error("The sequence is required");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
export function destroy(d: any) {
|
|
|
if (d && "destroy" in d)
|
|
|
d.destroy();
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Used to mark that the async operation isn't awaited intentionally.
|
|
|
* @param p The promise which represents the async operation.
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*/
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export function nowait(p: Promise<any>) {
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}
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/** represents already destroyed object.
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*/
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export const destroyed = {
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/** Calling to this method doesn't affect anything, noop.
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*/
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destroy() {
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}
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};
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