blob: 5dc94f67d26c5978610a2dfccdfd42df1c7f851a [file] [log] [blame]
// Type definitions for Q 1.5
// Project: https://github.com/kriskowal/q
// Definitions by: Barrie Nemetchek <https://github.com/bnemetchek>
// Andrew Gaspar <https://github.com/AndrewGaspar>
// John Reilly <https://github.com/johnnyreilly>
// Michel Boudreau <https://github.com/mboudreau>
// TeamworkGuy2 <https://github.com/TeamworkGuy2>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.3
export = Q;
export as namespace Q;
/**
* If value is a Q promise, returns the promise.
* If value is a promise from another library it is coerced into a Q promise (where possible).
* If value is not a promise, returns a promise that is fulfilled with value.
*/
declare function Q<T>(promise: PromiseLike<T> | T): Q.Promise<T>;
/**
* Calling with nothing at all creates a void promise
*/
declare function Q(): Q.Promise<void>;
declare namespace Q {
export type IWhenable<T> = PromiseLike<T> | T;
export type IPromise<T> = PromiseLike<T>;
export interface Deferred<T> {
promise: Promise<T>;
/**
* Calling resolve with a pending promise causes promise to wait on the passed promise, becoming fulfilled with its
* fulfillment value or rejected with its rejection reason (or staying pending forever, if the passed promise does).
* Calling resolve with a rejected promise causes promise to be rejected with the passed promise's rejection reason.
* Calling resolve with a fulfilled promise causes promise to be fulfilled with the passed promise's fulfillment value.
* Calling resolve with a non-promise value causes promise to be fulfilled with that value.
*/
resolve(value?: IWhenable<T>): void;
/**
* Calling reject with a reason causes promise to be rejected with that reason.
*/
reject(reason?: any): void;
/**
* Calling notify with a value causes promise to be notified of progress with that value. That is, any onProgress
* handlers registered with promise or promises derived from promise will be called with the progress value.
*/
notify(value: any): void;
/**
* Returns a function suitable for passing to a Node.js API. That is, it has a signature (err, result) and will
* reject deferred.promise with err if err is given, or fulfill it with result if that is given.
*/
makeNodeResolver(): (reason: any, value: T) => void;
}
export interface Promise<T> {
/**
* The then method from the Promises/A+ specification, with an additional progress handler.
*/
then<U>(onFulfill?: ((value: T) => IWhenable<U>) | null, onReject?: ((error: any) => IWhenable<U>) | null, onProgress?: ((progress: any) => any) | null): Promise<U>;
then<U = T, V = never>(onFulfill?: ((value: T) => IWhenable<U>) | null, onReject?: ((error: any) => IWhenable<V>) | null, onProgress?: ((progress: any) => any) | null): Promise<U | V>;
/**
* Like a finally clause, allows you to observe either the fulfillment or rejection of a promise, but to do so
* without modifying the final value. This is useful for collecting resources regardless of whether a job succeeded,
* like closing a database connection, shutting a server down, or deleting an unneeded key from an object.
* finally returns a promise, which will become resolved with the same fulfillment value or rejection reason
* as promise. However, if callback returns a promise, the resolution of the returned promise will be delayed
* until the promise returned from callback is finished. Furthermore, if the returned promise rejects, that
* rejection will be passed down the chain instead of the previous result.
*/
finally(finallyCallback: () => any): Promise<T>;
/**
* Alias for finally() (for non-ES5 browsers)
*/
fin(finallyCallback: () => any): Promise<T>;
/**
* Like then, but "spreads" the array into a variadic fulfillment handler. If any of the promises in the array are
* rejected, instead calls onRejected with the first rejected promise's rejection reason.
* This is especially useful in conjunction with all
*/
spread<U>(onFulfill: (...args: any[]) => IWhenable<U>, onReject?: (reason: any) => IWhenable<U>): Promise<U>;
/**
* A sugar method, equivalent to promise.then(undefined, onRejected).
*/
catch<U>(onRejected: (reason: any) => IWhenable<U>): Promise<U>;
/**
* Alias for catch() (for non-ES5 browsers)
*/
fail<U>(onRejected: (reason: any) => IWhenable<U>): Promise<U>;
/**
* A sugar method, equivalent to promise.then(undefined, undefined, onProgress).
*/
progress(onProgress: (progress: any) => any): Promise<T>;
/**
* Much like then, but with different behavior around unhandled rejection. If there is an unhandled rejection,
* either because promise is rejected and no onRejected callback was provided, or because onFulfilled or onRejected
* threw an error or returned a rejected promise, the resulting rejection reason is thrown as an exception in a
* future turn of the event loop.
* This method should be used to terminate chains of promises that will not be passed elsewhere. Since exceptions
* thrown in then callbacks are consumed and transformed into rejections, exceptions at the end of the chain are
* easy to accidentally, silently ignore. By arranging for the exception to be thrown in a future turn of the
* event loop, so that it won't be caught, it causes an onerror event on the browser window, or an uncaughtException
* event on Node.js's process object.
* Exceptions thrown by done will have long stack traces, if Q.longStackSupport is set to true. If Q.onerror is set,
* exceptions will be delivered there instead of thrown in a future turn.
* The Golden Rule of done vs. then usage is: either return your promise to someone else, or if the chain ends
* with you, call done to terminate it. Terminating with catch is not sufficient because the catch handler may
* itself throw an error.
*/
done(onFulfilled?: ((value: T) => any) | null, onRejected?: ((reason: any) => any) | null, onProgress?: ((progress: any) => any) | null): void;
/**
* If callback is a function, assumes it's a Node.js-style callback, and calls it as either callback(rejectionReason)
* when/if promise becomes rejected, or as callback(null, fulfillmentValue) when/if promise becomes fulfilled.
* If callback is not a function, simply returns promise.
*/
nodeify(callback: (reason: any, value: any) => void): Promise<T>;
/**
* Returns a promise to get the named property of an object. Essentially equivalent to
*
* @example
* promise.then(function (o) { return o[propertyName]; });
*/
get<U>(propertyName: string): Promise<U>;
set<U>(propertyName: string, value: any): Promise<U>;
delete<U>(propertyName: string): Promise<U>;
/**
* Returns a promise for the result of calling the named method of an object with the given array of arguments.
* The object itself is this in the function, just like a synchronous method call. Essentially equivalent to
*
* @example
* promise.then(function (o) { return o[methodName].apply(o, args); });
*/
post<U>(methodName: string, args: any[]): Promise<U>;
/**
* Returns a promise for the result of calling the named method of an object with the given variadic arguments.
* The object itself is this in the function, just like a synchronous method call.
*/
invoke<U>(methodName: string, ...args: any[]): Promise<U>;
/**
* Returns a promise for an array of the property names of an object. Essentially equivalent to
*
* @example
* promise.then(function (o) { return Object.keys(o); });
*/
keys(): Promise<string[]>;
/**
* Returns a promise for the result of calling a function, with the given array of arguments. Essentially equivalent to
*
* @example
* promise.then(function (f) {
* return f.apply(undefined, args);
* });
*/
fapply<U>(args: any[]): Promise<U>;
/**
* Returns a promise for the result of calling a function, with the given variadic arguments. Has the same return
* value/thrown exception translation as explained above for fbind.
* In its static form, it is aliased as Q.try, since it has semantics similar to a try block (but handling both
* synchronous exceptions and asynchronous rejections). This allows code like
*
* @example
* Q.try(function () {
* if (!isConnectedToCloud()) {
* throw new Error("The cloud is down!");
* }
* return syncToCloud();
* })
* .catch(function (error) {
* console.error("Couldn't sync to the cloud", error);
* });
*/
fcall<U>(...args: any[]): Promise<U>;
/**
* A sugar method, equivalent to promise.then(function () { return value; }).
*/
thenResolve<U>(value: U): Promise<U>;
/**
* A sugar method, equivalent to promise.then(function () { throw reason; }).
*/
thenReject<U = T>(reason?: any): Promise<U>;
/**
* Attaches a handler that will observe the value of the promise when it becomes fulfilled, returning a promise for
* that same value, perhaps deferred but not replaced by the promise returned by the onFulfilled handler.
*/
tap(onFulfilled: (value: T) => any): Promise<T>;
/**
* Returns a promise that will have the same result as promise, except that if promise is not fulfilled or rejected
* before ms milliseconds, the returned promise will be rejected with an Error with the given message. If message
* is not supplied, the message will be "Timed out after " + ms + " ms".
*/
timeout(ms: number, message?: string): Promise<T>;
/**
* Returns a promise that will have the same result as promise, but will only be fulfilled or rejected after at least
* ms milliseconds have passed.
*/
delay(ms: number): Promise<T>;
/**
* Returns whether a given promise is in the fulfilled state. When the static version is used on non-promises, the
* result is always true.
*/
isFulfilled(): boolean;
/**
* Returns whether a given promise is in the rejected state. When the static version is used on non-promises, the
* result is always false.
*/
isRejected(): boolean;
/**
* Returns whether a given promise is in the pending state. When the static version is used on non-promises, the
* result is always false.
*/
isPending(): boolean;
valueOf(): any;
/**
* Returns a "state snapshot" object, which will be in one of three forms:
*
* - { state: "pending" }
* - { state: "fulfilled", value: <fulfllment value> }
* - { state: "rejected", reason: <rejection reason> }
*/
inspect(): PromiseState<T>;
}
export interface PromiseState<T> {
state: "fulfilled" | "rejected" | "pending";
value?: T;
reason?: any;
}
/**
* Returns a "deferred" object with a:
* promise property
* resolve(value) method
* reject(reason) method
* notify(value) method
* makeNodeResolver() method
*/
export function defer<T>(): Deferred<T>;
/**
* Calling resolve with a pending promise causes promise to wait on the passed promise, becoming fulfilled with its
* fulfillment value or rejected with its rejection reason (or staying pending forever, if the passed promise does).
* Calling resolve with a rejected promise causes promise to be rejected with the passed promise's rejection reason.
* Calling resolve with a fulfilled promise causes promise to be fulfilled with the passed promise's fulfillment value.
* Calling resolve with a non-promise value causes promise to be fulfilled with that value.
*/
export function resolve<T>(object?: IWhenable<T>): Promise<T>;
/**
* Returns a promise that is rejected with reason.
*/
export function reject<T>(reason?: any): Promise<T>;
// If no value provided, returned promise will be of void type
export function when(): Promise<void>;
// if no fulfill, reject, or progress provided, returned promise will be of same type
export function when<T>(value: IWhenable<T>): Promise<T>;
// If a non-promise value is provided, it will not reject or progress
export function when<T, U>(value: IWhenable<T>, onFulfilled: (val: T) => IWhenable<U>, onRejected?: ((reason: any) => IWhenable<U>) | null, onProgress?: ((progress: any) => any) | null): Promise<U>;
/**
* (Deprecated) Returns a new function that calls a function asynchronously with the given variadic arguments, and returns a promise.
* Notably, any synchronous return values or thrown exceptions are transformed, respectively, into fulfillment values
* or rejection reasons for the promise returned by this new function.
* This method is especially useful in its static form for wrapping functions to ensure that they are always
* asynchronous, and that any thrown exceptions (intentional or accidental) are appropriately transformed into a
* returned rejected promise. For example:
*
* @example
* var getUserData = Q.fbind(function (userName) {
* if (!userName) {
* throw new Error("userName must be truthy!");
* }
* if (localCache.has(userName)) {
* return localCache.get(userName);
* }
* return getUserFromCloud(userName);
* });
*/
export function fbind<T>(method: (...args: any[]) => IWhenable<T>, ...args: any[]): (...args: any[]) => Promise<T>;
/**
* Returns a promise for the result of calling a function, with the given variadic arguments. Has the same return
* value/thrown exception translation as explained above for fbind.
* In its static form, it is aliased as Q.try, since it has semantics similar to a try block (but handling both synchronous
* exceptions and asynchronous rejections). This allows code like
*
* @example
* Q.try(function () {
* if (!isConnectedToCloud()) {
* throw new Error("The cloud is down!");
* }
* return syncToCloud();
* })
* .catch(function (error) {
* console.error("Couldn't sync to the cloud", error);
* });
*/
export function fcall<T>(method: (...args: any[]) => T, ...args: any[]): Promise<T>;
// but 'try' is a reserved word. This is the only way to get around this
/**
* Alias for fcall()
*/
export { fcall as try };
/**
* Returns a promise for the result of calling the named method of an object with the given variadic arguments.
* The object itself is this in the function, just like a synchronous method call.
*/
export function invoke<T>(obj: any, functionName: string, ...args: any[]): Promise<T>;
/**
* Alias for invoke()
*/
export function send<T>(obj: any, functionName: string, ...args: any[]): Promise<T>;
/**
* Alias for invoke()
*/
export function mcall<T>(obj: any, functionName: string, ...args: any[]): Promise<T>;
/**
* Creates a promise-returning function from a Node.js-style function, optionally binding it with the given
* variadic arguments. An example:
*
* @example
* var readFile = Q.nfbind(FS.readFile);
* readFile("foo.txt", "utf-8").done(function (text) {
* //...
* });
*
* Note that if you have a method that uses the Node.js callback pattern, as opposed to just a function, you will
* need to bind its this value before passing it to nfbind, like so:
*
* @example
* var Kitty = mongoose.model("Kitty");
* var findKitties = Q.nfbind(Kitty.find.bind(Kitty));
*
* The better strategy for methods would be to use Q.nbind, as shown below.
*/
export function nfbind<T>(nodeFunction: (...args: any[]) => any, ...args: any[]): (...args: any[]) => Promise<T>;
/**
* Alias for nfbind()
*/
export function denodeify<T>(nodeFunction: (...args: any[]) => any, ...args: any[]): (...args: any[]) => Promise<T>;
/**
* Creates a promise-returning function from a Node.js-style method, optionally binding it with the given
* variadic arguments. An example:
*
* @example
* var Kitty = mongoose.model("Kitty");
* var findKitties = Q.nbind(Kitty.find, Kitty);
* findKitties({ cute: true }).done(function (theKitties) {
* //...
* });
*/
export function nbind<T>(nodeFunction: (...args: any[]) => any, thisArg: any, ...args: any[]): (...args: any[]) => Promise<T>;
/**
* Calls a Node.js-style function with the given array of arguments, returning a promise that is fulfilled if the
* Node.js function calls back with a result, or rejected if it calls back with an error
* (or throws one synchronously). An example:
*
* @example
* Q.nfapply(FS.readFile, ["foo.txt", "utf-8"]).done(function (text) {
* });
*
* Note that this example only works because FS.readFile is a function exported from a module, not a method on
* an object. For methods, e.g. redisClient.get, you must bind the method to an instance before passing it to
* Q.nfapply (or, generally, as an argument to any function call):
*
* @example
* Q.nfapply(redisClient.get.bind(redisClient), ["user:1:id"]).done(function (user) {
* });
*
* The better strategy for methods would be to use Q.npost, as shown below.
*/
export function nfapply<T>(nodeFunction: (...args: any[]) => any, args: any[]): Promise<T>;
/**
* Calls a Node.js-style function with the given variadic arguments, returning a promise that is fulfilled if the
* Node.js function calls back with a result, or rejected if it calls back with an error
* (or throws one synchronously). An example:
*
* @example
* Q.nfcall(FS.readFile, "foo.txt", "utf-8").done(function (text) {
* });
*
* The same warning about functions vs. methods applies for nfcall as it does for nfapply. In this case, the better
* strategy would be to use Q.ninvoke.
*/
export function nfcall<T>(nodeFunction: (...args: any[]) => any, ...args: any[]): Promise<T>;
/**
* Calls a Node.js-style method with the given arguments array, returning a promise that is fulfilled if the method
* calls back with a result, or rejected if it calls back with an error (or throws one synchronously). An example:
*
* @example
* Q.npost(redisClient, "get", ["user:1:id"]).done(function (user) {
* });
*/
export function npost<T>(nodeModule: any, functionName: string, args: any[]): Promise<T>;
/**
* Calls a Node.js-style method with the given variadic arguments, returning a promise that is fulfilled if the
* method calls back with a result, or rejected if it calls back with an error (or throws one synchronously). An example:
*
* @example
* Q.ninvoke(redisClient, "get", "user:1:id").done(function (user) {
* });
*/
export function ninvoke<T>(nodeModule: any, functionName: string, ...args: any[]): Promise<T>;
/**
* Alias for ninvoke()
*/
export function nsend<T>(nodeModule: any, functionName: string, ...args: any[]): Promise<T>;
/**
* Returns a promise that is fulfilled with an array containing the fulfillment value of each promise, or is rejected with the same rejection reason as the first promise to be rejected.
*/
export function all<A, B, C, D, E, F>(promises: IWhenable<[IWhenable<A>, IWhenable<B>, IWhenable<C>, IWhenable<D>, IWhenable<E>, IWhenable<F>]>): Promise<[A, B, C, D, E, F]>;
/**
* Returns a promise that is fulfilled with an array containing the fulfillment value of each promise, or is rejected with the same rejection reason as the first promise to be rejected.
*/
export function all<A, B, C, D, E>(promises: IWhenable<[IWhenable<A>, IWhenable<B>, IWhenable<C>, IWhenable<D>, IWhenable<E>]>): Promise<[A, B, C, D, E]>;
/**
* Returns a promise that is fulfilled with an array containing the fulfillment value of each promise, or is rejected with the same rejection reason as the first promise to be rejected.
*/
export function all<A, B, C, D>(promises: IWhenable<[IWhenable<A>, IWhenable<B>, IWhenable<C>, IWhenable<D>]>): Promise<[A, B, C, D]>;
/**
* Returns a promise that is fulfilled with an array containing the fulfillment value of each promise, or is rejected with the same rejection reason as the first promise to be rejected.
*/
export function all<A, B, C>(promises: IWhenable<[IWhenable<A>, IWhenable<B>, IWhenable<C>]>): Promise<[A, B, C]>;
/**
* Returns a promise that is fulfilled with an array containing the fulfillment value of each promise, or is rejected with the same rejection reason as the first promise to be rejected.
*/
export function all<A, B>(promises: IWhenable<[IPromise<A>, IPromise<B>]>): Promise<[A, B]>;
export function all<A, B>(promises: IWhenable<[A, IPromise<B>]>): Promise<[A, B]>;
export function all<A, B>(promises: IWhenable<[IPromise<A>, B]>): Promise<[A, B]>;
export function all<A, B>(promises: IWhenable<[A, B]>): Promise<[A, B]>;
/**
* Returns a promise that is fulfilled with an array containing the fulfillment value of each promise, or is rejected with the same rejection reason as the first promise to be rejected.
*/
export function all<T>(promises: IWhenable<Array<IWhenable<T>>>): Promise<T[]>;
/**
* Returns a promise for the first of an array of promises to become settled.
*/
export function race<T>(promises: Array<IWhenable<T>>): Promise<T>;
/**
* Returns a promise that is fulfilled with an array of promise state snapshots, but only after all the original promises
* have settled, i.e. become either fulfilled or rejected.
*/
export function allSettled<T>(promises: IWhenable<Array<IWhenable<T>>>): Promise<Array<PromiseState<T>>>;
/**
* Deprecated Alias for allSettled()
*/
export function allResolved<T>(promises: IWhenable<Array<IWhenable<T>>>): Promise<Array<Promise<T>>>;
/**
* Like then, but "spreads" the array into a variadic fulfillment handler. If any of the promises in the array are
* rejected, instead calls onRejected with the first rejected promise's rejection reason. This is especially useful
* in conjunction with all.
*/
export function spread<T, U>(promises: Array<IWhenable<T>>, onFulfilled: (...args: T[]) => IWhenable<U>, onRejected?: (reason: any) => IWhenable<U>): Promise<U>;
/**
* Returns a promise that will have the same result as promise, except that if promise is not fulfilled or rejected
* before ms milliseconds, the returned promise will be rejected with an Error with the given message. If message
* is not supplied, the message will be "Timed out after " + ms + " ms".
*/
export function timeout<T>(promise: Promise<T>, ms: number, message?: string): Promise<T>;
/**
* Returns a promise that will have the same result as promise, but will only be fulfilled or rejected after at least ms milliseconds have passed.
*/
export function delay<T>(promiseOrValue: Promise<T> | T, ms: number): Promise<T>;
/**
* Returns a promise that will be fulfilled with undefined after at least ms milliseconds have passed.
*/
export function delay(ms: number): Promise<void>;
/**
* Returns whether a given promise is in the fulfilled state. When the static version is used on non-promises, the result is always true.
*/
export function isFulfilled(promise: Promise<any>): boolean;
/**
* Returns whether a given promise is in the rejected state. When the static version is used on non-promises, the result is always false.
*/
export function isRejected(promise: Promise<any>): boolean;
/**
* Returns whether a given promise is in the pending state. When the static version is used on non-promises, the result is always false.
*/
export function isPending(promiseOrObject: Promise<any> | any): boolean;
/**
* Synchronously calls resolver(resolve, reject, notify) and returns a promise whose state is controlled by the
* functions passed to resolver. This is an alternative promise-creation API that has the same power as the deferred
* concept, but without introducing another conceptual entity.
* If resolver throws an exception, the returned promise will be rejected with that thrown exception as the rejection reason.
* note: In the latest github, this method is called Q.Promise, but if you are using the npm package version 0.9.7
* or below, the method is called Q.promise (lowercase vs uppercase p).
*/
export function Promise<T>(resolver: (resolve: (val?: IWhenable<T>) => void, reject: (reason?: any) => void, notify: (progress: any) => void) => void): Promise<T>;
/**
* Creates a new version of func that accepts any combination of promise and non-promise values, converting them to their
* fulfillment values before calling the original func. The returned version also always returns a promise: if func does
* a return or throw, then Q.promised(func) will return fulfilled or rejected promise, respectively.
* This can be useful for creating functions that accept either promises or non-promise values, and for ensuring that
* the function always returns a promise even in the face of unintentional thrown exceptions.
*/
export function promised<T>(callback: (...args: any[]) => T): (...args: any[]) => Promise<T>;
/**
* Returns whether the given value is a Q promise.
*/
export function isPromise(object: any): object is Promise<any>;
/**
* Returns whether the given value is a promise (i.e. it's an object with a then function).
*/
export function isPromiseAlike(object: any): object is IPromise<any>;
/**
* If an object is not a promise, it is as "near" as possible.
* If a promise is rejected, it is as "near" as possible too.
* If it's a fulfilled promise, the fulfillment value is nearer.
* If it's a deferred promise and the deferred has been resolved, the
* resolution is "nearer".
*/
export function nearer<T>(promise: Promise<T>): T;
/**
* This is an experimental tool for converting a generator function into a deferred function. This has the potential
* of reducing nested callbacks in engines that support yield.
*/
export function async<T>(generatorFunction: any): (...args: any[]) => Promise<T>;
export function nextTick(callback: (...args: any[]) => any): void;
/**
* A settable property that will intercept any uncaught errors that would otherwise be thrown in the next tick of the
* event loop, usually as a result of done. Can be useful for getting the full
* stack trace of an error in browsers, which is not usually possible with window.onerror.
*/
export let onerror: (reason: any) => void;
/**
* A settable property that lets you turn on long stack trace support. If turned on, "stack jumps" will be tracked
* across asynchronous promise operations, so that if an uncaught error is thrown by done or a rejection reason's stack
* property is inspected in a rejection callback, a long stack trace is produced.
*/
export let longStackSupport: boolean;
/**
* Resets the global "Q" variable to the value it has before Q was loaded.
* This will either be undefined if there was no version or the version of Q which was already loaded before.
* @returns The last version of Q.
*/
export function noConflict(): typeof Q;
}