Co::__construct() - Code Metrics - Inspection of "Tested client-01.php" - mpyw/co - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 097a75...93608a )

by Ryosuke

created 2016-07-18 10:30 UTC

Co::__construct() A

↳ Parent: Co

Complexity

Conditions	1
Paths	1

Size

Total Lines	1
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes	4
Bugs	0	Features	0

Metric	Value
c	4
b	0
f	0
dl	0
loc	1
ccs	0
cts	0
cp	0
rs	10
cc	1
eloc	1
nc	1
nop	0
crap	2

<?php

namespace mpyw\Co;
use mpyw\Co\Internal\Utils;
use mpyw\Co\Internal\CoOption;
use mpyw\Co\Internal\GeneratorContainer;
use mpyw\Co\Internal\CURLPool;

use React\Promise\Deferred;
use React\Promise\PromiseInterface;
use function React\Promise\all;

class Co implements CoInterface
{
    /**
     * Instance of myself.
     * @var Co
     */
    private static $self;

    /**
     * Options.
     * @var CoOption
     */
    private $options;

    /**
     * cURL request pool object.
     * @var CURLPool
     */
    private $pool;

    /**
     * Overwrite CoOption default.
     * @param array $options
     */
    public static function setDefaultOptions(array $options)
    {
        CoOption::setDefault($options);
    }

    /**
     * Get CoOption default as array.
     * @return array
     */
    public static function getDefaultOptions()
    {
        return CoOption::getDefault();
    }

    /**
     * Wait until value is recursively resolved to return it.
     * This function call must be atomic.
     * @param  mixed $value
     * @param  array $options
     * @return mixed
     */
    public static function wait($value, array $options = [])
    {
        try {
            if (self::$self) {
                throw new \BadMethodCallException('Co::wait() is already running. Use Co::async() instead.');
            }
            self::$self = new self;
            return self::$self->start($value, new CoOption($options));
        } finally {
            self::$self = null;
        }
    }

    /**
     * Value is recursively resolved, but we never wait it.
     * This function must be called along with Co::wait().
     * @param  mixed $value
     * @param  array $options
     */
    public static function async($value, array $options = [])
    {
        if (!self::$self) {
            throw new \BadMethodCallException(
                'Co::async() must be called along with Co::wait(). ' .
                'This method is mainly expected to be used in CURLOPT_WRITEFUNCTION callback.'
            );
        }
        self::$self->start($value, self::$self->options->reconfigure($options), false);
    }

    /**
     * External instantiation is forbidden.
     */
    private function __construct() {}

    /**
     * Start resovling.
     * @param  mixed    $value
     * @param  CoOption $options
     * @param  bool     $wait
     * @param  mixed    If $wait, return resolved value.
     */
    private function start($value, CoOption $options, $wait = true)
    {
        $this->options = $options;
        $this->pool = new CURLPool($options);
        // If $wait, final result is stored into referenced $return
        if ($wait) {
            $deferred = new Deferred;
            $deferred->promise()->done(function ($r) use (&$return) {
                $return = $r;
            });
        }
        // For convenience, all values are wrapped into generator
        $genfunc = function () use ($value) {
            yield CoInterface::RETURN_WITH => (yield $value);
        };
        $con = Utils::normalize($genfunc, $options);
        // We have to provide deferred object only if $wait
        $this->processGeneratorContainer($con, $wait ? $deferred : null);
        // We have to wait $return only if $wait
        if ($wait) {
            $this->pool->wait();
            return $return;
        }
    }

    /**
     * Handle resolving generators.
     * @param  GeneratorContainer $gc
     * @param  Deferred           $deferred
     */
    private function processGeneratorContainer(GeneratorContainer $gc, Deferred $deferred = null)
    {
        // If generator has no more yields...
        if (!$gc->valid()) {
            // If exception has been thrown in generator, we have to propagate it as rejected value
            if ($gc->thrown()) {
                $deferred && $deferred->reject($gc->getReturnOrThrown());
                return;
            }
            // Now we normalize returned value
            try {
                $returned = Utils::normalize($gc->getReturnOrThrown(), $gc->getOptions());
                $yieldables = Utils::getYieldables($returned);
                // If normalized value contains yieldables, we have to chain resolver
                if ($yieldables) {
                    $this->promiseAll($yieldables, true)->then(
                        self::getApplier($returned, $yieldables, [$deferred, 'resolve']),
                        [$deferred, 'reject']
                    );
                    return;
                }
                // Propagate normalized returned value
                $deferred && $deferred->resolve($returned);
            } catch (\RuntimeException $e) {
                // Propagate exception thrown in normalization
                $deferred && $deferred->reject($e);
            }
            return;
        }

        // Now we normalize yielded value
        try {
            $yielded = Utils::normalize($gc->current(), $gc->getOptions(), $gc->key());
        } catch (\RuntimeException $e) {
            // If exception thrown in normalization...
            //   - If generator accepts exception, we throw it into generator
            //   - If generator does not accept exception, we assume it as non-exception value
            $gc->throwAcceptable() ? $gc->throw_($e) : $gc->send($e);
            // Continue
            $this->processGeneratorContainer($gc, $deferred);
            return;
        }

        // Search yieldables from yielded value
        $yieldables = Utils::getYieldables($yielded);
        if (!$yieldables) {
            // If there are no yieldables, send yielded value back into generator
            $gc->send($yielded);
            // Continue
            $this->processGeneratorContainer($gc, $deferred);
            return;
        }

        // Chain resolver
        $this->promiseAll($yieldables, $gc->throwAcceptable())->then(
            self::getApplier($yielded, $yieldables, [$gc, 'send']),
            [$gc, 'throw_']
        )->always(function () use ($gc, $deferred) {
            // Continue
            $this->processGeneratorContainer($gc, $deferred);
        });
    }

    /**
     * Return function that apply changes in yieldables.
     * @param  mixed    $yielded
     * @param  array    $yieldables
     * @param  callable $next
     */
    private static function getApplier($yielded, $yieldables, callable $next)
    {
        return function (array $results) use ($yielded, $yieldables, $next) {
            foreach ($results as $hash => $resolved) {
                $current = &$yielded;
                foreach ($yieldables[$hash]['keylist'] as $key) {
                    $current = &$current[$key];
                }
                $current = $resolved;
            }
            $next($yielded);
        };
    }

    /**
     * Promise all changes in yieldables are prepared.
     * @param  array $yieldables
     * @param  bool  $throw_acceptable
     * @return PromiseInterface
     */
    private function promiseAll($yieldables, $throw_acceptable)
    {
        $promises = [];
        foreach ($yieldables as $yieldable) {
            $dfd = new Deferred;
            $promises[(string)$yieldable['value']] = $dfd->promise();
            // If caller cannot accept exception,
            // we handle rejected value as resolved.
            if (!$throw_acceptable) {
                $original_dfd = $dfd;
                $dfd = new Deferred;
                $absorber = function ($any) use ($original_dfd) {
                    $original_dfd->resolve($any);
                };
                $dfd->promise()->then($absorber, $absorber);
            }
            // Add or enqueue cURL handles
            if (Utils::isCurl($yieldable['value'])) {
                $this->pool->addOrEnqueue($yieldable['value'], $dfd);
                continue;
            }
            // Process generators
            if (Utils::isGeneratorContainer($yieldable['value'])) {
                $this->processGeneratorContainer($yieldable['value'], $dfd);
                continue;
            }
        }
        return all($promises);
    }
}


1		<?php
2
3		namespace mpyw\Co;
4		use mpyw\Co\Internal\Utils;
5		use mpyw\Co\Internal\CoOption;
6		use mpyw\Co\Internal\GeneratorContainer;
7		use mpyw\Co\Internal\CURLPool;
8
9		use React\Promise\Deferred;
10		use React\Promise\PromiseInterface;
11		use function React\Promise\all;
12
13		class Co implements CoInterface
14		{
15		/**
16		* Instance of myself.
17		* @var Co
18		*/
19		private static $self;
20
21		/**
22		* Options.
23		* @var CoOption
24		*/
25		private $options;
26
27		/**
28		* cURL request pool object.
29		* @var CURLPool
30		*/
31		private $pool;
32
33		/**
34		* Overwrite CoOption default.
35		* @param array $options
36		*/
37		public static function setDefaultOptions(array $options)
38		{
39		CoOption::setDefault($options);
40		}
41
42		/**
43		* Get CoOption default as array.
44		* @return array
45		*/
46		public static function getDefaultOptions()
47		{
48		return CoOption::getDefault();
49		}
50
51		/**
52		* Wait until value is recursively resolved to return it.
53		* This function call must be atomic.
54		* @param mixed $value
55		* @param array $options
56		* @return mixed
57		*/
58	4	public static function wait($value, array $options = [])
59	4	{
60		try {
61	4	if (self::$self) {
62		throw new \BadMethodCallException('Co::wait() is already running. Use Co::async() instead.');
63		}
64	4	self::$self = new self;
65	4	return self::$self->start($value, new CoOption($options));
66		} finally {
67	4	self::$self = null;
68		}
69		}
70
71		/**
72		* Value is recursively resolved, but we never wait it.
73		* This function must be called along with Co::wait().
74		* @param mixed $value
75		* @param array $options
76		*/
77	1	public static function async($value, array $options = [])
78	1	{
79	1	if (!self::$self) {
80		throw new \BadMethodCallException(
81		'Co::async() must be called along with Co::wait(). ' .
82		'This method is mainly expected to be used in CURLOPT_WRITEFUNCTION callback.'
83		);
84		}
85	1	self::$self->start($value, self::$self->options->reconfigure($options), false);
86	1	}
87
88		/**
89		* External instantiation is forbidden.
90		*/
91		private function __construct() {}
92
93		/**
94		* Start resovling.
95		* @param mixed $value
96		* @param CoOption $options
97		* @param bool $wait
98		* @param mixed If $wait, return resolved value.
99		*/
100	4	private function start($value, CoOption $options, $wait = true)
101	4	{
102	4	$this->options = $options;
103	4	$this->pool = new CURLPool($options);
104		// If $wait, final result is stored into referenced $return
105	4	if ($wait) {
106	4	$deferred = new Deferred;
107		$deferred->promise()->done(function ($r) use (&$return) {
108	4	$return = $r;
109	4	});
110		}
111		// For convenience, all values are wrapped into generator
112		$genfunc = function () use ($value) {
113	4	yield CoInterface::RETURN_WITH => (yield $value);
114	4	};
115	4	$con = Utils::normalize($genfunc, $options);
116		// We have to provide deferred object only if $wait
117	4	$this->processGeneratorContainer($con, $wait ? $deferred : null);
118		// We have to wait $return only if $wait
119	4	if ($wait) {
120	4	$this->pool->wait();
121	4	return $return;
122		}
123	1	}
124
125		/**
126		* Handle resolving generators.
127		* @param GeneratorContainer $gc
128		* @param Deferred $deferred
129		*/
130	4	private function processGeneratorContainer(GeneratorContainer $gc, Deferred $deferred = null)
131	4	{
132		// If generator has no more yields...
133	4	if (!$gc->valid()) {
134		// If exception has been thrown in generator, we have to propagate it as rejected value
135	4	if ($gc->thrown()) {
136		$deferred && $deferred->reject($gc->getReturnOrThrown());
137		return;
138		}
139		// Now we normalize returned value
140		try {
141	4	$returned = Utils::normalize($gc->getReturnOrThrown(), $gc->getOptions());
142	4	$yieldables = Utils::getYieldables($returned);
143		// If normalized value contains yieldables, we have to chain resolver
144	4	if ($yieldables) {
145	1	$this->promiseAll($yieldables, true)->then(
146	1	self::getApplier($returned, $yieldables, [$deferred, 'resolve']),
147	1	[$deferred, 'reject']
148		);
149	1	return;
150		}
151		// Propagate normalized returned value
152	4	$deferred && $deferred->resolve($returned);
153		} catch (\RuntimeException $e) {
154		// Propagate exception thrown in normalization
155		$deferred && $deferred->reject($e);
156		}
157	4	return;
158		}
159
160		// Now we normalize yielded value
161		try {
162	4	$yielded = Utils::normalize($gc->current(), $gc->getOptions(), $gc->key());
163		} catch (\RuntimeException $e) {
164		// If exception thrown in normalization...
165		// - If generator accepts exception, we throw it into generator
166		// - If generator does not accept exception, we assume it as non-exception value
167		$gc->throwAcceptable() ? $gc->throw_($e) : $gc->send($e);
168		// Continue
169		$this->processGeneratorContainer($gc, $deferred);
170		return;
171		}
172
173		// Search yieldables from yielded value
174	4	$yieldables = Utils::getYieldables($yielded);
175	4	if (!$yieldables) {
176		// If there are no yieldables, send yielded value back into generator
177	2	$gc->send($yielded);
178		// Continue
179	2	$this->processGeneratorContainer($gc, $deferred);
180	2	return;
181		}
182
183		// Chain resolver
184	3	$this->promiseAll($yieldables, $gc->throwAcceptable())->then(
185	3	self::getApplier($yielded, $yieldables, [$gc, 'send']),
186	3	[$gc, 'throw_']
187		)->always(function () use ($gc, $deferred) {
188		// Continue
189	3	$this->processGeneratorContainer($gc, $deferred);
190	3	});
191	3	}
192
193		/**
194		* Return function that apply changes in yieldables.
195		* @param mixed $yielded
196		* @param array $yieldables
197		* @param callable $next
198		*/
199	3	private static function getApplier($yielded, $yieldables, callable $next)
200	3	{
201		return function (array $results) use ($yielded, $yieldables, $next) {
202	3	foreach ($results as $hash => $resolved) {
203	3	$current = &$yielded;
204	3	foreach ($yieldables[$hash]['keylist'] as $key) {
205	3	$current = &$current[$key];
206		}
207	3	$current = $resolved;
208		}
209	3	$next($yielded);
210	3	};
211		}
212
213		/**
214		* Promise all changes in yieldables are prepared.
215		* @param array $yieldables
216		* @param bool $throw_acceptable
217		* @return PromiseInterface
218		*/
219	3	private function promiseAll($yieldables, $throw_acceptable)
220	3	{
221	3	$promises = [];
222	3	foreach ($yieldables as $yieldable) {
223	3	$dfd = new Deferred;
224	3	$promises[(string)$yieldable['value']] = $dfd->promise();
225		// If caller cannot accept exception,
226		// we handle rejected value as resolved.
227	3	if (!$throw_acceptable) {
228	1	$original_dfd = $dfd;
229	1	$dfd = new Deferred;
230	1	$absorber = function ($any) use ($original_dfd) {
231	1	$original_dfd->resolve($any);
232	1	};
233	1	$dfd->promise()->then($absorber, $absorber);
234		}
235		// Add or enqueue cURL handles
236	3	if (Utils::isCurl($yieldable['value'])) {
237	2	$this->pool->addOrEnqueue($yieldable['value'], $dfd);
238	2	continue;
239		}
240		// Process generators
241	2	if (Utils::isGeneratorContainer($yieldable['value'])) {
242	2	$this->processGeneratorContainer($yieldable['value'], $dfd);
243	2	continue;
244		}
245		}
246	3	return all($promises);
247		}
248		}
249

mpyw / co

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Co::__construct() A

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