EventProjectionist::callEventHandlers() - Code Metrics - Inspection of "add failing tests" - spatie/laravel-event-projector - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 54f797...c92ba1 )

by Freek

created 2018-06-20 14:41 UTC

EventProjectionist::callEventHandlers() C

↳ Parent: EventProjectionist

Complexity

Conditions	8
Paths	1

Size

Total Lines	44
Code Lines	24

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	44
rs	5.3846
c	0
b	0
f	0
cc	8
eloc	24
nc	1
nop	2

<?php

namespace Spatie\EventProjector;

use Exception;
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\Exceptions\InvalidEventHandler;
use Spatie\EventProjector\Events\EventHandlerFailedHandlingEvent;
use Spatie\EventProjector\Events\ProjectorDidNotHandlePriorEvents;

class EventProjectionist
{
    /** @var \Illuminate\Support\Collection */
    protected $projectors;

    /** @var \Illuminate\Support\Collection */
    protected $reactors;

    /** @var bool */
    protected $isReplayingEvents = false;

    /** @var int */
    protected $config;

    public function __construct(array $config)
    {
        $this->projectors = collect();

        $this->reactors = collect();

        $this->config = $config;

    }

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

    public function addProjector($projector): self
    {
        $this->guardAgainstInvalidEventHandler($projector);

        if ($this->alreadyAdded('projector', $projector)) {
            return $this;
        }

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

        return $this;
    }

    public function addProjectors(array $projectors): self
    {
        collect($projectors)->each(function ($projector) {
            $this->addProjector($projector);
        });

        return $this;
    }

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

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

    public function addReactor($reactor): self
    {
        $this->guardAgainstInvalidEventHandler($reactor);

        if ($this->alreadyAdded('reactor', $reactor)) {
            return $this;
        }

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

        return $this;
    }

    public function addReactors(array $reactors): self
    {
        collect($reactors)->each(function ($reactor) {
            $this->addReactor($reactor);
        });

        return $this;
    }

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

    public function storeEvent(ShouldBeStored $event)
    {
        $storedEvent = $this->config['stored_event_model']::createForEvent($event);

        $this->handleImmediately($storedEvent);

        dispatch(new HandleStoredEventJob($storedEvent))->onQueue($this->config['queue']);
    }

    public function handle(StoredEvent $storedEvent)
    {
        $this
            ->callEventHandlers($this->projectors, $storedEvent)
            ->callEventHandlers($this->reactors, $storedEvent);
    }

    public function handleImmediately(StoredEvent $storedEvent)
    {
        $projectors = $this->instantiate($this->projectors);

        $projectors = $projectors->filter->shouldBeCalledImmediately();

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

    protected function callEventHandlers(Collection $eventHandlers, StoredEvent $storedEvent): self
    {
        $eventHandlers
            ->pipe(function (Collection $eventHandlers) {
                return $this->instantiate($eventHandlers);
            })
            ->filter(function (EventHandler $eventHandler) use ($storedEvent) {
                if (! $eventHandler instanceof Projector) {
                    return true;
                }

                $event = $storedEvent->event;

                if (! $method = $eventHandler->methodNameThatHandlesEvent($event)) {
                    return false;
                }

                if (! method_exists($eventHandler, $method)) {
                    throw InvalidEventHandler::eventHandlingMethodDoesNotExist($eventHandler, $event, $method);
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

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

                return true;
            })
            ->filter(function (EventHandler $eventHandler) use ($storedEvent) {
                if ($eventHandler instanceof Projector) {
                    if (! $eventHandler->hasReceivedAllPriorEvents($storedEvent)) {
                        event(new ProjectorDidNotHandlePriorEvents($eventHandler, $storedEvent));

                        return false;
                    }
                }

                return true;
            })
            ->each(function (EventHandler $eventHandler) use ($storedEvent) {
                $eventWasHandledSuccessfully = $this->callEventHandler($eventHandler, $storedEvent);

                if ($eventHandler instanceof Projector && $eventWasHandledSuccessfully) {
                    $eventHandler->rememberReceivedEvent($storedEvent);
                }
            });

        return $this;
    }

    protected function callEventHandler(EventHandler $eventHandler, StoredEvent $storedEvent): bool
    {
        $event = $storedEvent->event;

        if (! $method = $eventHandler->methodNameThatHandlesEvent($event)) {
            return true;
        }

        try {
            app()->call([$eventHandler, $method], compact('event', 'storedEvent'));
        } catch (Exception $exception) {
            if (! $this->config['catch_exceptions']) {
                throw $exception;
            }

            $eventHandler->handleException($exception);

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

            return false;
        }

        return true;
    }

    public function replayEvents(Collection $projectors, int $afterStoredEventId = 0, callable $onEventReplayed = null)
    {
        $this->isReplayingEvents = true;

        event(new StartingEventReplay($projectors));

        $projectors = $this->instantiate($projectors);

        $this->callMethod($projectors, 'onStartingEventReplay');

        StoredEvent::query()
            ->after($afterStoredEventId ?? 0)
            ->chunk($this->config['replay_chunk_size'], function (Collection $storedEvents) use ($projectors, $onEventReplayed) {
                $storedEvents->each(function (StoredEvent $storedEvent) use ($projectors, $onEventReplayed) {
                    $this->callEventHandlers($projectors, $storedEvent);

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

        $this->isReplayingEvents = false;

        event(new FinishedEventReplay());

        $this->callMethod($projectors, 'onFinishedEventReplay');
    }

    protected function guardAgainstInvalidEventHandler($eventHandler)
    {
        if (! is_string($eventHandler)) {
            return;
        }

        if (! class_exists($eventHandler)) {
            throw InvalidEventHandler::doesNotExist($eventHandler);
        }
    }

    protected function instantiate(Collection $eventHandlers)
    {
        return $eventHandlers->map(function ($eventHandler) {
            if (is_string($eventHandler)) {
                $eventHandler = app($eventHandler);
            }

            return $eventHandler;
        });
    }

    protected function callMethod(Collection $eventHandlers, string $method): self
    {
        $eventHandlers
            ->filter(function (EventHandler $eventHandler) use ($method) {
                return method_exists($eventHandler, $method);
            })
            ->each(function (EventHandler $eventHandler) use ($method) {
                return app()->call([$eventHandler, $method]);
            });

        return $this;
    }

    protected function alreadyAdded(string $type, $eventHandler)
    {
        $eventHandlerClassName = is_string($eventHandler)
            ? $eventHandler
            : get_class($eventHandler);

        $variableName = "{$type}s";

        $currentEventHandlers = $this->$variableName->toArray();

        if (in_array($eventHandlerClassName, $currentEventHandlers)) {
            return $this;
        }
    }

    protected function getClassNames(Collection $eventHandlers): array
    {
        return $eventHandlers
            ->map(function ($eventHandler) {
                if (is_string($eventHandler)) {
                    return $eventHandler;
                }

                return get_class($eventHandler);
            })
            ->toArray();
    }
}


1			<?php
2
3			namespace Spatie\EventProjector;
4
5			use Exception;
6			use Illuminate\Support\Collection;
7			use Spatie\EventProjector\Models\StoredEvent;
8			use Spatie\EventProjector\Projectors\Projector;
9			use Spatie\EventProjector\EventHandlers\EventHandler;
10			use Spatie\EventProjector\Events\FinishedEventReplay;
11			use Spatie\EventProjector\Events\StartingEventReplay;
12			use Spatie\EventProjector\Exceptions\InvalidEventHandler;
13			use Spatie\EventProjector\Events\EventHandlerFailedHandlingEvent;
14			use Spatie\EventProjector\Events\ProjectorDidNotHandlePriorEvents;
15
16			class EventProjectionist
17			{
18			/** @var \Illuminate\Support\Collection */
19			protected $projectors;
20
21			/** @var \Illuminate\Support\Collection */
22			protected $reactors;
23
24			/** @var bool */
25			protected $isReplayingEvents = false;
26
27			/** @var int */
28			protected $config;
29
30			public function __construct(array $config)
31			{
32			$this->projectors = collect();
33
34			$this->reactors = collect();
35
36			$this->config = $config;
			0 ignored issues – show Documentation Bug introduced 2018-06-05 20:24 UTC by Report Bug Copy Issue Report It seems like `$config` of type `array` is incompatible with the declared type `integer` of property `$config`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
37			}
38
39			public function isReplayingEvents(): bool
40			{
41			return $this->isReplayingEvents;
42			}
43
44			public function addProjector($projector): self
45			{
46			$this->guardAgainstInvalidEventHandler($projector);
47
48			if ($this->alreadyAdded('projector', $projector)) {
49			return $this;
50			}
51
52			$this->projectors->push($projector);
53
54			return $this;
55			}
56
57			public function addProjectors(array $projectors): self
58			{
59			collect($projectors)->each(function ($projector) {
60			$this->addProjector($projector);
61			});
62
63			return $this;
64			}
65
66			public function getProjectors(): Collection
67			{
68			return $this->projectors;
69			}
70
71			public function getProjector(string $name): ?Projector
72			{
73			return $this
74			->instantiate($this->projectors)
75			->first(function (Projector $projector) use ($name) {
76			return $projector->getName() === $name;
77			});
78			}
79
80			public function addReactor($reactor): self
81			{
82			$this->guardAgainstInvalidEventHandler($reactor);
83
84			if ($this->alreadyAdded('reactor', $reactor)) {
85			return $this;
86			}
87
88			$this->reactors->push($reactor);
89
90			return $this;
91			}
92
93			public function addReactors(array $reactors): self
94			{
95			collect($reactors)->each(function ($reactor) {
96			$this->addReactor($reactor);
97			});
98
99			return $this;
100			}
101
102			public function getReactors(): Collection
103			{
104			return $this->reactors;
105			}
106
107			public function storeEvent(ShouldBeStored $event)
108			{
109			$storedEvent = $this->config['stored_event_model']::createForEvent($event);
110
111			$this->handleImmediately($storedEvent);
112
113			dispatch(new HandleStoredEventJob($storedEvent))->onQueue($this->config['queue']);
114			}
115
116			public function handle(StoredEvent $storedEvent)
117			{
118			$this
119			->callEventHandlers($this->projectors, $storedEvent)
120			->callEventHandlers($this->reactors, $storedEvent);
121			}
122
123			public function handleImmediately(StoredEvent $storedEvent)
124			{
125			$projectors = $this->instantiate($this->projectors);
126
127			$projectors = $projectors->filter->shouldBeCalledImmediately();
128
129			$this->callEventHandlers($projectors, $storedEvent);
130			}
131
132			protected function callEventHandlers(Collection $eventHandlers, StoredEvent $storedEvent): self
133			{
134			$eventHandlers
135			->pipe(function (Collection $eventHandlers) {
136			return $this->instantiate($eventHandlers);
137			})
138			->filter(function (EventHandler $eventHandler) use ($storedEvent) {
139			if (! $eventHandler instanceof Projector) {
140			return true;
141			}
142
143			$event = $storedEvent->event;
144
145			if (! $method = $eventHandler->methodNameThatHandlesEvent($event)) {
146			return false;
147			}
148
149			if (! method_exists($eventHandler, $method)) {
150			throw InvalidEventHandler::eventHandlingMethodDoesNotExist($eventHandler, $event, $method);
			0 ignored issues – show Documentation introduced 2018-06-15 13:58 UTC by Report Bug Copy Issue Report `$eventHandler` is of type `object<Spatie\EventProje...r\Projectors\Projector>`, but the function expects a `object<Spatie\EventProjector\Exceptions\object>`. 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...
151			}
152
153			return true;
154			})
155			->filter(function (EventHandler $eventHandler) use ($storedEvent) {
156			if ($eventHandler instanceof Projector) {
157			if (! $eventHandler->hasReceivedAllPriorEvents($storedEvent)) {
158			event(new ProjectorDidNotHandlePriorEvents($eventHandler, $storedEvent));
159
160			return false;
161			}
162			}
163
164			return true;
165			})
166			->each(function (EventHandler $eventHandler) use ($storedEvent) {
167			$eventWasHandledSuccessfully = $this->callEventHandler($eventHandler, $storedEvent);
168
169			if ($eventHandler instanceof Projector && $eventWasHandledSuccessfully) {
170			$eventHandler->rememberReceivedEvent($storedEvent);
171			}
172			});
173
174			return $this;
175			}
176
177			protected function callEventHandler(EventHandler $eventHandler, StoredEvent $storedEvent): bool
178			{
179			$event = $storedEvent->event;
180
181			if (! $method = $eventHandler->methodNameThatHandlesEvent($event)) {
182			return true;
183			}
184
185			try {
186			app()->call([$eventHandler, $method], compact('event', 'storedEvent'));
187			} catch (Exception $exception) {
188			if (! $this->config['catch_exceptions']) {
189			throw $exception;
190			}
191
192			$eventHandler->handleException($exception);
193
194			event(new EventHandlerFailedHandlingEvent($eventHandler, $storedEvent, $exception));
195
196			return false;
197			}
198
199			return true;
200			}
201
202			public function replayEvents(Collection $projectors, int $afterStoredEventId = 0, callable $onEventReplayed = null)
203			{
204			$this->isReplayingEvents = true;
205
206			event(new StartingEventReplay($projectors));
207
208			$projectors = $this->instantiate($projectors);
209
210			$this->callMethod($projectors, 'onStartingEventReplay');
211
212			StoredEvent::query()
213			->after($afterStoredEventId ?? 0)
214			->chunk($this->config['replay_chunk_size'], function (Collection $storedEvents) use ($projectors, $onEventReplayed) {
215			$storedEvents->each(function (StoredEvent $storedEvent) use ($projectors, $onEventReplayed) {
216			$this->callEventHandlers($projectors, $storedEvent);
217
218			if ($onEventReplayed) {
219			$onEventReplayed($storedEvent);
220			}
221			});
222			});
223
224			$this->isReplayingEvents = false;
225
226			event(new FinishedEventReplay());
227
228			$this->callMethod($projectors, 'onFinishedEventReplay');
229			}
230
231			protected function guardAgainstInvalidEventHandler($eventHandler)
232			{
233			if (! is_string($eventHandler)) {
234			return;
235			}
236
237			if (! class_exists($eventHandler)) {
238			throw InvalidEventHandler::doesNotExist($eventHandler);
239			}
240			}
241
242			protected function instantiate(Collection $eventHandlers)
243			{
244			return $eventHandlers->map(function ($eventHandler) {
245			if (is_string($eventHandler)) {
246			$eventHandler = app($eventHandler);
247			}
248
249			return $eventHandler;
250			});
251			}
252
253			protected function callMethod(Collection $eventHandlers, string $method): self
254			{
255			$eventHandlers
256			->filter(function (EventHandler $eventHandler) use ($method) {
257			return method_exists($eventHandler, $method);
258			})
259			->each(function (EventHandler $eventHandler) use ($method) {
260			return app()->call([$eventHandler, $method]);
261			});
262
263			return $this;
264			}
265
266			protected function alreadyAdded(string $type, $eventHandler)
267			{
268			$eventHandlerClassName = is_string($eventHandler)
269			? $eventHandler
270			: get_class($eventHandler);
271
272			$variableName = "{$type}s";
273
274			$currentEventHandlers = $this->$variableName->toArray();
275
276			if (in_array($eventHandlerClassName, $currentEventHandlers)) {
277			return $this;
278			}
279			}
280
281			protected function getClassNames(Collection $eventHandlers): array
282			{
283			return $eventHandlers
284			->map(function ($eventHandler) {
285			if (is_string($eventHandler)) {
286			return $eventHandler;
287			}
288
289			return get_class($eventHandler);
290			})
291			->toArray();
292			}
293			}
294

spatie / laravel-event-projector

Push — master ( 54f797...c92ba1 )

EventProjectionist::callEventHandlers() C

Complexity

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