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<?php
namespace React\Promise;
interface ExtendedPromiseInterface extends PromiseInterface
{
/**
* Consumes the promise's ultimate value if the promise fulfills, or handles the
* ultimate error.
*
* It will cause a fatal error if either `$onFulfilled` or
* `$onRejected` throw or return a rejected promise.
*
* Since the purpose of `done()` is consumption rather than transformation,
* `done()` always returns `null`.
*
* @param callable|null $onFulfilled
* @param callable|null $onRejected
* @param callable|null $onProgress This argument is deprecated and should not be used anymore.
* @return void
*/
public function done(callable $onFulfilled = null, callable $onRejected = null, callable $onProgress = null);
/**
* Registers a rejection handler for promise. It is a shortcut for:
*
* ```php
* $promise->then(null, $onRejected);
* ```
*
* Additionally, you can type hint the `$reason` argument of `$onRejected` to catch
* only specific errors.
*
* @param callable $onRejected
* @return ExtendedPromiseInterface
*/
public function otherwise(callable $onRejected);
/**
* Allows you to execute "cleanup" type tasks in a promise chain.
*
* It arranges for `$onFulfilledOrRejected` to be called, with no arguments,
* when the promise is either fulfilled or rejected.
*
* * If `$promise` fulfills, and `$onFulfilledOrRejected` returns successfully,
* `$newPromise` will fulfill with the same value as `$promise`.
* * If `$promise` fulfills, and `$onFulfilledOrRejected` throws or returns a
* rejected promise, `$newPromise` will reject with the thrown exception or
* rejected promise's reason.
* * If `$promise` rejects, and `$onFulfilledOrRejected` returns successfully,
* `$newPromise` will reject with the same reason as `$promise`.
* * If `$promise` rejects, and `$onFulfilledOrRejected` throws or returns a
* rejected promise, `$newPromise` will reject with the thrown exception or
* rejected promise's reason.
*
* `always()` behaves similarly to the synchronous finally statement. When combined
* with `otherwise()`, `always()` allows you to write code that is similar to the familiar
* synchronous catch/finally pair.
*
* Consider the following synchronous code:
*
* ```php
* try {
* return doSomething();
* } catch(\Exception $e) {
* return handleError($e);
* } finally {
* cleanup();
* }
* ```
*
* Similar asynchronous code (with `doSomething()` that returns a promise) can be
* written:
*
* ```php
* return doSomething()
* ->otherwise('handleError')
* ->always('cleanup');
* ```
*
* @param callable $onFulfilledOrRejected
* @return ExtendedPromiseInterface
*/
public function always(callable $onFulfilledOrRejected);
/**
* Registers a handler for progress updates from promise. It is a shortcut for:
*
* ```php
* $promise->then(null, null, $onProgress);
* ```
*
* @param callable $onProgress
* @return ExtendedPromiseInterface
* @deprecated 2.6.0 Progress support is deprecated and should not be used anymore.
*/
public function progress(callable $onProgress);
}
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