1<?php
2
3namespace GuzzleHttp\Promise;
4
5/**
6 * A promise that has been fulfilled.
7 *
8 * Thenning off of this promise will invoke the onFulfilled callback
9 * immediately and ignore other callbacks.
10 */
11class FulfilledPromise implements PromiseInterface
12{
13    private $value;
14
15    public function __construct($value)
16    {
17        if (is_object($value) && method_exists($value, 'then')) {
18            throw new \InvalidArgumentException(
19                'You cannot create a FulfilledPromise with a promise.'
20            );
21        }
22
23        $this->value = $value;
24    }
25
26    public function then(
27        callable $onFulfilled = null,
28        callable $onRejected = null
29    ) {
30        // Return itself if there is no onFulfilled function.
31        if (!$onFulfilled) {
32            return $this;
33        }
34
35        $queue = Utils::queue();
36        $p = new Promise([$queue, 'run']);
37        $value = $this->value;
38        $queue->add(static function () use ($p, $value, $onFulfilled) {
39            if (Is::pending($p)) {
40                try {
41                    $p->resolve($onFulfilled($value));
42                } catch (\Throwable $e) {
43                    $p->reject($e);
44                } catch (\Exception $e) {
45                    $p->reject($e);
46                }
47            }
48        });
49
50        return $p;
51    }
52
53    public function otherwise(callable $onRejected)
54    {
55        return $this->then(null, $onRejected);
56    }
57
58    public function wait($unwrap = true, $defaultDelivery = null)
59    {
60        return $unwrap ? $this->value : null;
61    }
62
63    public function getState()
64    {
65        return self::FULFILLED;
66    }
67
68    public function resolve($value)
69    {
70        if ($value !== $this->value) {
71            throw new \LogicException("Cannot resolve a fulfilled promise");
72        }
73    }
74
75    public function reject($reason)
76    {
77        throw new \LogicException("Cannot reject a fulfilled promise");
78    }
79
80    public function cancel()
81    {
82        // pass
83    }
84}
85