Promise::resolver() - Code Metrics - ThrusterIO/promise - Measure and Improve Code Quality continuously with Scrutinizer

Promise::resolver() B
last analyzed 2016-01-21 21:19 UTC

↳ Parent: Promise

Complexity

Conditions	3
Paths	1

Size

Total Lines	30
Code Lines	20

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	17
CRAP Score	3

Metric	Value
dl	0
loc	30
ccs	17
cts	17
cp	1
rs	8.8571
cc	3
eloc	20
nc	1
nop	3
crap	3

<?php

namespace Thruster\Component\Promise;

/**
 * Class Promise
 *
 * @package Thruster\Component\Promise
 * @author  Aurimas Niekis <[email protected]>
 */
class Promise implements ExtendedPromiseInterface, CancellablePromiseInterface
{
    /**
     * @var callable
     */
    private $canceller;

    private $result;

    /**
     * @var array
     */
    private $handlers;

    /**
     * @var array
     */
    private $progressHandlers;

    /**
     * @var int
     */
    private $requiredCancelRequests;

    /**
     * @var int
     */
    private $cancelRequests;

    public function __construct(callable $resolver, callable $canceller = null)
    {
        $this->handlers = [];
        $this->progressHandlers = [];

        $this->requiredCancelRequests = 0;
        $this->cancelRequests         = 0;

        $this->canceller = $canceller;
        $this->call($resolver);
    }

    public function then(
        callable $onFulfilled = null,
        callable $onRejected = null,
        callable $onProgress = null
    ) : PromiseInterface {
        if (null !== $this->result) {
            return $this->result()->then($onFulfilled, $onRejected, $onProgress);
        }

        if (null === $this->canceller) {
            return new static($this->resolver($onFulfilled, $onRejected, $onProgress));
        }

        $this->requiredCancelRequests++;

        return new static($this->resolver($onFulfilled, $onRejected, $onProgress), function () {
            if (++$this->cancelRequests < $this->requiredCancelRequests) {
                return;
            }

            $this->cancel();
        });
    }

    public function done(callable $onFulfilled = null, callable $onRejected = null, callable $onProgress = null)
    {
        if (null !== $this->result) {
            return $this->result()->done($onFulfilled, $onRejected, $onProgress);
        }

        $this->handlers[] = function (ExtendedPromiseInterface $promise) use ($onFulfilled, $onRejected) {
            $promise
                ->done($onFulfilled, $onRejected);
        };

        if ($onProgress) {
            $this->progressHandlers[] = $onProgress;
        }
    }

    public function otherwise(callable $onRejected) : ExtendedPromiseInterface
    {
        return $this->then(null, function ($reason) use ($onRejected) {
            if (!_checkTypehint($onRejected, $reason)) {
                return new RejectedPromise($reason);
            }

            return $onRejected($reason);
        });
    }

    public function always(callable $onFulfilledOrRejected) : ExtendedPromiseInterface
    {
        return $this->then(function ($value) use ($onFulfilledOrRejected) {
            return resolve($onFulfilledOrRejected())->then(function () use ($value) {
                return $value;
            });
        }, function ($reason) use ($onFulfilledOrRejected) {
            return resolve($onFulfilledOrRejected())->then(function () use ($reason) {
                return new RejectedPromise($reason);
            });
        });
    }

    public function progress(callable $onProgress) : ExtendedPromiseInterface
    {
        return $this->then(null, null, $onProgress);
    }

    public function cancel()
    {
        if (null === $this->canceller || null !== $this->result) {
            return;
        }

        $this->call($this->canceller);
    }

    private function resolver(callable $onFulfilled = null, callable $onRejected = null, callable $onProgress = null)
    {
        return function ($resolve, $reject, $notify) use ($onFulfilled, $onRejected, $onProgress) {
            if ($onProgress) {
                $progressHandler = function ($update) use ($notify, $onProgress) {
                    try {
                        $notify($onProgress($update));
                    } catch (\Exception $e) {
                        $notify($e);
                    }
                };
            } else {
                $progressHandler = $notify;
            }

            $this->handlers[] = function (ExtendedPromiseInterface $promise) use (
                $onFulfilled,
                $onRejected,
                $resolve,
                $reject,
                $progressHandler
            ) {
                $promise
                    ->then($onFulfilled, $onRejected)
                    ->done($resolve, $reject, $progressHandler);
            };

            $this->progressHandlers[] = $progressHandler;
        };
    }

    private function resolve($value = null)
    {
        if (null !== $this->result) {
            return;
        }

        $this->settle(resolve($value));
    }

    private function reject($reason = null)
    {
        if (null !== $this->result) {
            return;
        }

        $this->settle(reject($reason));
    }

    private function notify($update = null)
    {
        if (null !== $this->result) {
            return;
        }

        foreach ($this->progressHandlers as $handler) {
            $handler($update);
        }
    }

    private function settle(ExtendedPromiseInterface $promise)
    {
        $handlers = $this->handlers;

        $this->progressHandlers = $this->handlers = [];
        $this->result           = $promise;

        foreach ($handlers as $handler) {
            $handler($promise);
        }
    }

    private function result()
    {
        while ($this->result instanceof self && null !== $this->result->result) {
            $this->result = $this->result->result;
        }

        return $this->result;
    }

    private function call(callable $callback)
    {
        try {
            $callback(
                function ($value = null) {
                    $this->resolve($value);
                },
                function ($reason = null) {
                    $this->reject($reason);
                },
                function ($update = null) {
                    $this->notify($update);
                }
            );
        } catch (\Exception $e) {
            $this->reject($e);
        }
    }
}


1		<?php
2
3		namespace Thruster\Component\Promise;
4
5		/**
6		* Class Promise
7		*
8		* @package Thruster\Component\Promise
9		* @author Aurimas Niekis <[email protected]>
10		*/
11		class Promise implements ExtendedPromiseInterface, CancellablePromiseInterface
12		{
13		/**
14		* @var callable
15		*/
16		private $canceller;
17
18		private $result;
19
20		/**
21		* @var array
22		*/
23		private $handlers;
24
25		/**
26		* @var array
27		*/
28		private $progressHandlers;
29
30		/**
31		* @var int
32		*/
33		private $requiredCancelRequests;
34
35		/**
36		* @var int
37		*/
38		private $cancelRequests;
39
40	383	public function __construct(callable $resolver, callable $canceller = null)
41		{
42	383	$this->handlers = [];
43	383	$this->progressHandlers = [];
44
45	383	$this->requiredCancelRequests = 0;
46	383	$this->cancelRequests = 0;
47
48	383	$this->canceller = $canceller;
49	383	$this->call($resolver);
50	383	}
51
52	271	public function then(
53		callable $onFulfilled = null,
54		callable $onRejected = null,
55		callable $onProgress = null
56		) : PromiseInterface {
57	271	if (null !== $this->result) {
58	141	return $this->result()->then($onFulfilled, $onRejected, $onProgress);
59		}
60
61	139	if (null === $this->canceller) {
62	112	return new static($this->resolver($onFulfilled, $onRejected, $onProgress));
63		}
64
65	27	$this->requiredCancelRequests++;
66
67		return new static($this->resolver($onFulfilled, $onRejected, $onProgress), function () {
68	9	if (++$this->cancelRequests < $this->requiredCancelRequests) {
69	6	return;
70		}
71
72	9	$this->cancel();
73	27	});
74		}
75
76	94	public function done(callable $onFulfilled = null, callable $onRejected = null, callable $onProgress = null)
77		{
78	94	if (null !== $this->result) {
79	36	return $this->result()->done($onFulfilled, $onRejected, $onProgress);
80		}
81
82		$this->handlers[] = function (ExtendedPromiseInterface $promise) use ($onFulfilled, $onRejected) {
83		$promise
84	40	->done($onFulfilled, $onRejected);
85	16	};
86
87	58	if ($onProgress) {
88	16	$this->progressHandlers[] = $onProgress;
89		}
90	58	}
91
92	21	public function otherwise(callable $onRejected) : ExtendedPromiseInterface
93		{
94		return $this->then(null, function ($reason) use ($onRejected) {
95	15	if (!_checkTypehint($onRejected, $reason)) {
96	3	return new RejectedPromise($reason);
97		}
98
99	12	return $onRejected($reason);
100	21	});
101		}
102
103	66	public function always(callable $onFulfilledOrRejected) : ExtendedPromiseInterface
104		{
105		return $this->then(function ($value) use ($onFulfilledOrRejected) {
106		return resolve($onFulfilledOrRejected())->then(function () use ($value) {
107	21	return $value;
108	27	});
109		}, function ($reason) use ($onFulfilledOrRejected) {
110		return resolve($onFulfilledOrRejected())->then(function () use ($reason) {
111	18	return new RejectedPromise($reason);
112	24	});
113	66	});
114		}
115
116	6	public function progress(callable $onProgress) : ExtendedPromiseInterface
117		{
118	6	return $this->then(null, null, $onProgress);
119		}
120
121	54	public function cancel()
122		{
123	54	if (null === $this->canceller \|\| null !== $this->result) {
124	24	return;
125		}
126
127	33	$this->call($this->canceller);
128	33	}
129
130	139	private function resolver(callable $onFulfilled = null, callable $onRejected = null, callable $onProgress = null)
131		{
132		return function ($resolve, $reject, $notify) use ($onFulfilled, $onRejected, $onProgress) {
133	139	if ($onProgress) {
134		$progressHandler = function ($update) use ($notify, $onProgress) {
135		try {
136	34	$notify($onProgress($update));
137	3	} catch (\Exception $e) {
138	3	$notify($e);
139		}
140	34	};
141		} else {
142	111	$progressHandler = $notify;
143		}
144
145		$this->handlers[] = function (ExtendedPromiseInterface $promise) use (
146	93	$onFulfilled,
147	93	$onRejected,
148	93	$resolve,
149	93	$reject,
150	93	$progressHandler
151		) {
152		$promise
153	93	->then($onFulfilled, $onRejected)
154	93	->done($resolve, $reject, $progressHandler);
155	90	};
156
157	139	$this->progressHandlers[] = $progressHandler;
158	139	};
159		}
160
161	214	private function resolve($value = null)
162		{
163	214	if (null !== $this->result) {
164	11	return;
165		}
166
167	214	$this->settle(resolve($value));
168	208	}
169
170	160	private function reject($reason = null)
171		{
172	160	if (null !== $this->result) {
173	6	return;
174		}
175
176	160	$this->settle(reject($reason));
177	142	}
178
179	46	private function notify($update = null)
180		{
181	46	if (null !== $this->result) {
182	6	return;
183		}
184
185	40	foreach ($this->progressHandlers as $handler) {
186	40	$handler($update);
187		}
188	37	}
189
190	321	private function settle(ExtendedPromiseInterface $promise)
191		{
192	321	$handlers = $this->handlers;
193
194	321	$this->progressHandlers = $this->handlers = [];
195	321	$this->result = $promise;
196
197	321	foreach ($handlers as $handler) {
198	126	$handler($promise);
199		}
200	300	}
201
202	177	private function result()
203		{
204	177	while ($this->result instanceof self && null !== $this->result->result) {
205		$this->result = $this->result->result;
206		}
207
208	177	return $this->result;
209		}
210
211	383	private function call(callable $callback)
212		{
213		try {
214	383	$callback(
215		function ($value = null) {
216	214	$this->resolve($value);
217	383	},
218		function ($reason = null) {
219	156	$this->reject($reason);
220	383	},
221	383	function ($update = null) {
222	46	$this->notify($update);
223	383	}
224		);
225	4	} catch (\Exception $e) {
226	4	$this->reject($e);
227		}
228	383	}
229		}
230

ThrusterIO / promise

Promise::resolver() B last analyzed 2016-01-21 21:19 UTC

Complexity

Size

Duplication

Code Coverage

Duplication Side-by-Side

Filter issues like

Promise::resolver() B
last analyzed 2016-01-21 21:19 UTC