Projectionist::addEventHandler() - Code Metrics - Inspection of "Auto discover event handlers" - spatie/laravel-event-projector - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#148)

by Freek

created 2019-04-16 13:48 UTC

Projectionist::addEventHandler() A

↳ Parent: Projectionist

Complexity

Conditions	5
Paths	8

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	26
rs	9.1928
c	0
b	0
f	0
cc	5
nc	8
nop	1

<?php

namespace Spatie\EventProjector;

use Exception;
use Illuminate\Support\Arr;
use Illuminate\Support\Collection;
use Spatie\EventProjector\Models\StoredEvent;
use Spatie\EventProjector\Projectors\Projector;
use Spatie\EventProjector\EventHandlers\EventHandler;
use Spatie\EventProjector\Events\FinishedEventReplay;
use Spatie\EventProjector\Events\StartingEventReplay;
use Spatie\EventProjector\Projectors\QueuedProjector;
use Spatie\EventProjector\Exceptions\InvalidEventHandler;
use Spatie\EventProjector\EventHandlers\EventHandlerCollection;
use Spatie\EventProjector\Events\EventHandlerFailedHandlingEvent;

final class Projectionist
{
    /** @var \Spatie\EventProjector\EventHandlers\EventHandlerCollection */
    private $projectors;

    /** @var \Spatie\EventProjector\EventHandlers\EventHandlerCollection */
    private $reactors;

    /** @var bool */
    private $catchExceptions;

    /** @var bool */
    private $replayChunkSize;

    /** @var string */
    private $storedEventClass;

    /** @var bool */
    private $isProjecting = false;

    /** @var bool */
    private $isReplaying = false;

    public function __construct(array $config)
    {
        $this->projectors = new EventHandlerCollection();
        $this->reactors = new EventHandlerCollection();

        $this->catchExceptions = $config['catch_exceptions'];
        $this->replayChunkSize = $config['replay_chunk_size'];
        $this->storedEventClass = $config['stored_event_model'];
    }

    public function addProjector($projector): Projectionist
    {
        if (is_string($projector)) {
            $projector = app($projector);
        }

        if (! $projector instanceof Projector) {
            throw InvalidEventHandler::notAProjector($projector);
        }

        $this->projectors->add($projector);

        return $this;
    }

    public function withoutEventHandlers(array $eventHandlers = null): Projectionist
    {
        if (is_null($eventHandlers)) {
            $this->projectors = new EventHandlerCollection();
            $this->reactors = new EventHandlerCollection();

            return $this;
        }

        $eventHandlers = Arr::wrap($eventHandlers);

        $this->projectors->remove($eventHandlers);

        $this->reactors->remove($eventHandlers);

        return $this;
    }

    public function withoutEventHandler(string $eventHandler): Projectionist
    {
        return $this->withoutEventHandlers([$eventHandler]);
    }

    public function addProjectors(array $projectors): Projectionist
    {
        foreach ($projectors as $projector) {
            $this->addProjector($projector);
        }

        return $this;
    }

    public function getProjectors(): Collection
    {
        return $this->projectors->all();
    }

    public function getProjector(string $name): ?Projector
    {
        return $this->projectors->all()->first(function (Projector $projector) use ($name) {
            return $projector->getName() === $name;
        });
    }

    public function addReactor($reactor): Projectionist
    {
        if (is_string($reactor)) {
            $reactor = app($reactor);
        }

        if (! $reactor instanceof EventHandler) {
            throw InvalidEventHandler::notAnEventHandler($reactor);
        }

        $this->reactors->add($reactor);

        return $this;
    }

    public function addReactors(array $reactors): Projectionist
    {
        foreach ($reactors as $reactor) {
            $this->addReactor($reactor);
        }

        return $this;
    }

    public function getReactors(): Collection
    {
        return $this->reactors->all();
    }

    public function addEventHandler($eventHandlerClass)
    {
        if (! is_string($eventHandlerClass)) {
            $eventHandlerClass = get_class($eventHandlerClass);
        }

        if (is_subclass_of($eventHandlerClass, Projector::class)) {
            $this->addProjector($eventHandlerClass);

            return;
        }

        if (is_subclass_of($eventHandlerClass, QueuedProjector::class)) {
            $this->addProjector($eventHandlerClass);

            return;
        }

        if (is_subclass_of($eventHandlerClass, EventHandler::class)) {
            $this->addReactor($eventHandlerClass);

            return;
        }

        throw InvalidEventHandler::notAnEventHandlingClassName($eventHandlerClass);
    }

    public function addEventHandlers(array $eventHandlers)
    {
        foreach ($eventHandlers as $eventHandler) {
            $this->addEventHandler($eventHandler);
        }
    }

    public function handle(StoredEvent $storedEvent): void
    {
        $projectors = $this->projectors
            ->forEvent($storedEvent)
            ->reject(function (Projector $projector) {
                return $projector->shouldBeCalledImmediately();
            });

        $this->applyStoredEventToProjectors(
            $storedEvent,
            $projectors
        );

        $this->applyStoredEventToReactors(
            $storedEvent,
            $this->reactors->forEvent($storedEvent)
        );
    }

    public function handleWithSyncProjectors(StoredEvent $storedEvent): void
    {
        $projectors = $this->projectors
            ->forEvent($storedEvent)
            ->filter(function (Projector $projector) {
                return $projector->shouldBeCalledImmediately();
            });

        $this->applyStoredEventToProjectors($storedEvent, $projectors);
    }

    public function isProjecting(): bool
    {
        return $this->isProjecting;
    }

    private function applyStoredEventToProjectors(StoredEvent $storedEvent, Collection $projectors): void
    {
        $this->isProjecting = true;

        foreach ($projectors as $projector) {
            $this->callEventHandler($projector, $storedEvent);
        }

        $this->isProjecting = false;
    }

    private function applyStoredEventToReactors(StoredEvent $storedEvent, Collection $reactors): void
    {
        foreach ($reactors as $reactor) {
            $this->callEventHandler($reactor, $storedEvent);
        }
    }

    private function callEventHandler(EventHandler $eventHandler, StoredEvent $storedEvent): bool
    {
        try {
            $eventHandler->handle($storedEvent);
        } catch (Exception $exception) {
            if (! $this->catchExceptions) {
                throw $exception;
            }

            $eventHandler->handleException($exception);

            event(new EventHandlerFailedHandlingEvent($eventHandler, $storedEvent, $exception));

            return false;
        }

        return true;
    }

    public function isReplaying(): bool
    {
        return $this->isReplaying;
    }

    public function replay(
        Collection $projectors,
        int $startingFromEventId = 0,
        callable $onEventReplayed = null
    ): void {
        $projectors = new EventHandlerCollection($projectors);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

        $this->isReplaying = true;

        if ($startingFromEventId === 0) {
            $projectors->all()->each(function (Projector $projector) {
                if (method_exists($projector, 'resetState')) {
                    $projector->resetState();

                }
            });
        }

        event(new StartingEventReplay($projectors->all()));

        $projectors->call('onStartingEventReplay');

        $this->storedEventClass::query()

            ->startingFrom($startingFromEventId ?? 0)
            ->chunk($this->replayChunkSize, function (Collection $storedEvents) use ($projectors, $onEventReplayed) {
                $storedEvents->each(function (StoredEvent $storedEvent) use ($projectors, $onEventReplayed) {
                    $this->applyStoredEventToProjectors(
                        $storedEvent,
                        $projectors->forEvent($storedEvent)
                    );

                    if ($onEventReplayed) {
                        $onEventReplayed($storedEvent);
                    }
                });
            });

        $this->isReplaying = false;

        event(new FinishedEventReplay());

        $projectors->call('onFinishedEventReplay');
    }
}


1			<?php
2
3			namespace Spatie\EventProjector;
4
5			use Exception;
6			use Illuminate\Support\Arr;
7			use Illuminate\Support\Collection;
8			use Spatie\EventProjector\Models\StoredEvent;
9			use Spatie\EventProjector\Projectors\Projector;
10			use Spatie\EventProjector\EventHandlers\EventHandler;
11			use Spatie\EventProjector\Events\FinishedEventReplay;
12			use Spatie\EventProjector\Events\StartingEventReplay;
13			use Spatie\EventProjector\Projectors\QueuedProjector;
14			use Spatie\EventProjector\Exceptions\InvalidEventHandler;
15			use Spatie\EventProjector\EventHandlers\EventHandlerCollection;
16			use Spatie\EventProjector\Events\EventHandlerFailedHandlingEvent;
17
18			final class Projectionist
19			{
20			/** @var \Spatie\EventProjector\EventHandlers\EventHandlerCollection */
21			private $projectors;
22
23			/** @var \Spatie\EventProjector\EventHandlers\EventHandlerCollection */
24			private $reactors;
25
26			/** @var bool */
27			private $catchExceptions;
28
29			/** @var bool */
30			private $replayChunkSize;
31
32			/** @var string */
33			private $storedEventClass;
34
35			/** @var bool */
36			private $isProjecting = false;
37
38			/** @var bool */
39			private $isReplaying = false;
40
41			public function __construct(array $config)
42			{
43			$this->projectors = new EventHandlerCollection();
44			$this->reactors = new EventHandlerCollection();
45
46			$this->catchExceptions = $config['catch_exceptions'];
47			$this->replayChunkSize = $config['replay_chunk_size'];
48			$this->storedEventClass = $config['stored_event_model'];
49			}
50
51			public function addProjector($projector): Projectionist
52			{
53			if (is_string($projector)) {
54			$projector = app($projector);
55			}
56
57			if (! $projector instanceof Projector) {
58			throw InvalidEventHandler::notAProjector($projector);
59			}
60
61			$this->projectors->add($projector);
62
63			return $this;
64			}
65
66			public function withoutEventHandlers(array $eventHandlers = null): Projectionist
67			{
68			if (is_null($eventHandlers)) {
69			$this->projectors = new EventHandlerCollection();
70			$this->reactors = new EventHandlerCollection();
71
72			return $this;
73			}
74
75			$eventHandlers = Arr::wrap($eventHandlers);
76
77			$this->projectors->remove($eventHandlers);
78
79			$this->reactors->remove($eventHandlers);
80
81			return $this;
82			}
83
84			public function withoutEventHandler(string $eventHandler): Projectionist
85			{
86			return $this->withoutEventHandlers([$eventHandler]);
87			}
88
89			public function addProjectors(array $projectors): Projectionist
90			{
91			foreach ($projectors as $projector) {
92			$this->addProjector($projector);
93			}
94
95			return $this;
96			}
97
98			public function getProjectors(): Collection
99			{
100			return $this->projectors->all();
101			}
102
103			public function getProjector(string $name): ?Projector
104			{
105			return $this->projectors->all()->first(function (Projector $projector) use ($name) {
106			return $projector->getName() === $name;
107			});
108			}
109
110			public function addReactor($reactor): Projectionist
111			{
112			if (is_string($reactor)) {
113			$reactor = app($reactor);
114			}
115
116			if (! $reactor instanceof EventHandler) {
117			throw InvalidEventHandler::notAnEventHandler($reactor);
118			}
119
120			$this->reactors->add($reactor);
121
122			return $this;
123			}
124
125			public function addReactors(array $reactors): Projectionist
126			{
127			foreach ($reactors as $reactor) {
128			$this->addReactor($reactor);
129			}
130
131			return $this;
132			}
133
134			public function getReactors(): Collection
135			{
136			return $this->reactors->all();
137			}
138
139			public function addEventHandler($eventHandlerClass)
140			{
141			if (! is_string($eventHandlerClass)) {
142			$eventHandlerClass = get_class($eventHandlerClass);
143			}
144
145			if (is_subclass_of($eventHandlerClass, Projector::class)) {
146			$this->addProjector($eventHandlerClass);
147
148			return;
149			}
150
151			if (is_subclass_of($eventHandlerClass, QueuedProjector::class)) {
152			$this->addProjector($eventHandlerClass);
153
154			return;
155			}
156
157			if (is_subclass_of($eventHandlerClass, EventHandler::class)) {
158			$this->addReactor($eventHandlerClass);
159
160			return;
161			}
162
163			throw InvalidEventHandler::notAnEventHandlingClassName($eventHandlerClass);
164			}
165
166			public function addEventHandlers(array $eventHandlers)
167			{
168			foreach ($eventHandlers as $eventHandler) {
169			$this->addEventHandler($eventHandler);
170			}
171			}
172
173			public function handle(StoredEvent $storedEvent): void
174			{
175			$projectors = $this->projectors
176			->forEvent($storedEvent)
177			->reject(function (Projector $projector) {
178			return $projector->shouldBeCalledImmediately();
179			});
180
181			$this->applyStoredEventToProjectors(
182			$storedEvent,
183			$projectors
184			);
185
186			$this->applyStoredEventToReactors(
187			$storedEvent,
188			$this->reactors->forEvent($storedEvent)
189			);
190			}
191
192			public function handleWithSyncProjectors(StoredEvent $storedEvent): void
193			{
194			$projectors = $this->projectors
195			->forEvent($storedEvent)
196			->filter(function (Projector $projector) {
197			return $projector->shouldBeCalledImmediately();
198			});
199
200			$this->applyStoredEventToProjectors($storedEvent, $projectors);
201			}
202
203			public function isProjecting(): bool
204			{
205			return $this->isProjecting;
206			}
207
208			private function applyStoredEventToProjectors(StoredEvent $storedEvent, Collection $projectors): void
209			{
210			$this->isProjecting = true;
211
212			foreach ($projectors as $projector) {
213			$this->callEventHandler($projector, $storedEvent);
214			}
215
216			$this->isProjecting = false;
217			}
218
219			private function applyStoredEventToReactors(StoredEvent $storedEvent, Collection $reactors): void
220			{
221			foreach ($reactors as $reactor) {
222			$this->callEventHandler($reactor, $storedEvent);
223			}
224			}
225
226			private function callEventHandler(EventHandler $eventHandler, StoredEvent $storedEvent): bool
227			{
228			try {
229			$eventHandler->handle($storedEvent);
230			} catch (Exception $exception) {
231			if (! $this->catchExceptions) {
232			throw $exception;
233			}
234
235			$eventHandler->handleException($exception);
236
237			event(new EventHandlerFailedHandlingEvent($eventHandler, $storedEvent, $exception));
238
239			return false;
240			}
241
242			return true;
243			}
244
245			public function isReplaying(): bool
246			{
247			return $this->isReplaying;
248			}
249
250			public function replay(
251			Collection $projectors,
252			int $startingFromEventId = 0,
253			callable $onEventReplayed = null
254			): void {
255			$projectors = new EventHandlerCollection($projectors);
			0 ignored issues – show Documentation introduced 2018-07-11 11:49 UTC by Report Bug Copy Issue Report `$projectors` is of type `object<Illuminate\Support\Collection>`, but the function expects a `array`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
256
257			$this->isReplaying = true;
258
259			if ($startingFromEventId === 0) {
260			$projectors->all()->each(function (Projector $projector) {
261			if (method_exists($projector, 'resetState')) {
262			$projector->resetState();
			0 ignored issues – show Bug introduced 2019-04-08 16:03 UTC by Report Bug Copy Issue Report The method `resetState()` does not seem to exist on `object<Spatie\EventProje...r\Projectors\Projector>`. This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces. This is most likely a typographical error or the method has been renamed. Loading history...
263			}
264			});
265			}
266
267			event(new StartingEventReplay($projectors->all()));
268
269			$projectors->call('onStartingEventReplay');
270
271			$this->storedEventClass::query()
			0 ignored issues – show Bug introduced 2019-04-13 16:11 UTC by Report Bug Copy Issue Report The method `query` cannot be called on `$this->storedEventClass` (of type `string`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
272			->startingFrom($startingFromEventId ?? 0)
273			->chunk($this->replayChunkSize, function (Collection $storedEvents) use ($projectors, $onEventReplayed) {
274			$storedEvents->each(function (StoredEvent $storedEvent) use ($projectors, $onEventReplayed) {
275			$this->applyStoredEventToProjectors(
276			$storedEvent,
277			$projectors->forEvent($storedEvent)
278			);
279
280			if ($onEventReplayed) {
281			$onEventReplayed($storedEvent);
282			}
283			});
284			});
285
286			$this->isReplaying = false;
287
288			event(new FinishedEventReplay());
289
290			$projectors->call('onFinishedEventReplay');
291			}
292			}
293

spatie / laravel-event-projector

Pull Request — master (#148)

Projectionist::addEventHandler() A

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