/
JobSeekers.php
310 lines (260 loc) · 8.17 KB
/
JobSeekers.php
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<?php
declare(strict_types=1);
require_once __DIR__.'/../bootstrap.php';
/**
* JobSeeker aggregate root.
*/
class JobSeeker extends Broadway\EventSourcing\EventSourcedAggregateRoot
{
private $jobSeekerId;
private $jobs = [];
/**
* Factory method to create a job seeker.
*/
public static function startLookingForWork($jobSeekerId)
{
$jobSeeker = new self();
// After instantiation of the object we apply the "JobSeekerStartedLookingForWorkEvent".
$jobSeeker->apply(new JobSeekerStartedLookingForWorkEvent($jobSeekerId));
return $jobSeeker;
}
/**
* Every aggregate root will expose its id.
*
* @return string
*/
public function getAggregateRootId(): string
{
return $this->jobSeekerId;
}
public function heldJob($jobId, $title, $description)
{
if (array_key_exists($jobId, $this->jobs)) {
throw new \InvalidArgumentException("Job {$jobId} already assigned to this job seeker.");
}
$this->apply(new JobWasAddedToJobSeekerEvent($this->jobSeekerId, $jobId, $title, $description));
}
public function removeAccidentallyAddedJob($jobId)
{
$this->apply(new AccidentallyAddedJobWasRemovedFromJobSeekerEvent($this->jobSeekerId, $jobId));
}
public function describeJob($jobId, $title, $description)
{
if (!array_key_exists($jobId, $this->jobs)) {
throw new \InvalidArgumentException("Job {$jobId} is not assigned to this job seeker.");
}
$this->jobs[$jobId]->describe($title, $description);
}
public function applyJobSeekerStartedLookingForWorkEvent(JobSeekerStartedLookingForWorkEvent $event)
{
$this->jobSeekerId = $event->jobSeekerId;
}
public function applyJobWasAddedToJobSeekerEvent(JobWasAddedToJobSeekerEvent $event)
{
$this->jobs[$event->jobId] = new Job(
$event->jobSeekerId,
$event->jobId,
$event->title,
$event->description
);
}
public function applyAccidentallyAddedJobWasRemovedFromJobSeekerEvent(
AccidentallyAddedJobWasRemovedFromJobSeekerEvent $event
) {
unset($this->jobs[$event->jobId]);
}
protected function getChildEntities(): array
{
return $this->jobs;
}
}
class Job extends Broadway\EventSourcing\SimpleEventSourcedEntity
{
private $jobSeekerId;
private $jobId;
private $title;
private $description;
public function __construct($jobSeekerId, $jobId, $title, $description)
{
$this->jobSeekerId = $jobSeekerId;
$this->jobId = $jobId;
$this->title = $title;
$this->description = $description;
}
public function describe($title, $description)
{
if ($title === $this->title && $description === $this->description) {
// If there is no change to the title and description we do not need to
// generate an event.
return;
}
$this->apply(new JobWasDescribedForJobSeekerEvent(
$this->jobSeekerId,
$this->jobId,
$title,
$description
));
}
public function applyJobWasDescribedForJobSeekerEvent(JobWasDescribedForJobSeekerEvent $event)
{
if ($event->jobId !== $this->jobId) {
// Make sure that we only apply events that are intended for
// *this* job instance and no others.
return;
}
$this->title = $event->title;
$this->description = $event->description;
}
}
class JobSeekerStartLookingForWorkCommand
{
public $jobSeekerId;
public function __construct($jobSeekerId)
{
$this->jobSeekerId = $jobSeekerId;
}
}
class JobSeekerStartedLookingForWorkEvent
{
public $jobSeekerId;
public function __construct($jobSeekerId)
{
$this->jobSeekerId = $jobSeekerId;
}
}
class AddJobToJobSeekerCommand
{
public $jobSeekerId;
public $jobId;
public $title;
public $description;
public function __construct($jobSeekerId, $jobId, $title, $description)
{
$this->jobSeekerId = $jobSeekerId;
$this->jobId = $jobId;
$this->title = $title;
$this->description = $description;
}
}
class JobWasAddedToJobSeekerEvent
{
public $jobSeekerId;
public $jobId;
public $title;
public $description;
public function __construct($jobSeekerId, $jobId, $title, $description)
{
$this->jobSeekerId = $jobSeekerId;
$this->jobId = $jobId;
$this->title = $title;
$this->description = $description;
}
}
class DescribeJobForJobSeekerCommand
{
public $jobSeekerId;
public $jobId;
public $title;
public $description;
public function __construct($jobSeekerId, $jobId, $title, $description)
{
$this->jobSeekerId = $jobSeekerId;
$this->jobId = $jobId;
$this->title = $title;
$this->description = $description;
}
}
class JobWasDescribedForJobSeekerEvent
{
public $jobSeekerId;
public $jobId;
public $title;
public $description;
public function __construct($jobSeekerId, $jobId, $title, $description)
{
$this->jobSeekerId = $jobSeekerId;
$this->jobId = $jobId;
$this->title = $title;
$this->description = $description;
}
}
class RemoveAccidentallyAddedJobFromJobSeekerCommand
{
public $jobSeekerId;
public $jobId;
public function __construct($jobSeekerId, $jobId)
{
$this->jobSeekerId = $jobSeekerId;
$this->jobId = $jobId;
}
}
class AccidentallyAddedJobWasRemovedFromJobSeekerEvent
{
public $jobSeekerId;
public $jobId;
public function __construct($jobSeekerId, $jobId)
{
$this->jobSeekerId = $jobSeekerId;
$this->jobId = $jobId;
}
}
/**
* A repository that will only store and retrieve JobSeeker aggregate roots.
*/
class JobSeekerRepository extends Broadway\EventSourcing\EventSourcingRepository
{
public function __construct(Broadway\EventStore\EventStore $eventStore, Broadway\EventHandling\EventBus $eventBus)
{
parent::__construct($eventStore, $eventBus, 'JobSeeker', new Broadway\EventSourcing\AggregateFactory\PublicConstructorAggregateFactory());
}
}
/*
* A command handler will be registered with the command bus and handle the
* commands that are dispatched.
*/
class JobSeekerCommandHandler extends Broadway\CommandHandling\SimpleCommandHandler
{
private $repository;
public function __construct(Broadway\EventSourcing\EventSourcingRepository $repository)
{
$this->repository = $repository;
}
/**
* A new job seeker aggregate root is created and added to the repository.
*/
protected function handleJobSeekerStartLookingForWorkCommand(JobSeekerStartLookingForWorkCommand $command)
{
$jobSeeker = JobSeeker::startLookingForWork($command->jobSeekerId);
$this->repository->save($jobSeeker);
}
/**
* An existing job seeker aggregate root is loaded and heldJob() is
* called.
*/
protected function handleAddJobToJobSeekerCommand(AddJobToJobSeekerCommand $command)
{
$jobSeeker = $this->repository->load($command->jobSeekerId);
$jobSeeker->heldJob($command->jobId, $command->title, $command->description);
$this->repository->save($jobSeeker);
}
/**
* An existing job seeker aggregate root is loaded and describeJob() is
* called.
*/
protected function handleDescribeJobForJobSeekerCommand(DescribeJobForJobSeekerCommand $command)
{
$jobSeeker = $this->repository->load($command->jobSeekerId);
$jobSeeker->describeJob($command->jobId, $command->title, $command->description);
$this->repository->save($jobSeeker);
}
/**
* An existing job seeker aggregate root is loaded and removeAccidentallyAddedJob()
* is called.
*/
protected function handleRemoveAccidentallyAddedJobFromJobSeekerCommand(RemoveAccidentallyAddedJobFromJobSeekerCommand $command)
{
$jobSeeker = $this->repository->load($command->jobSeekerId);
$jobSeeker->removeAccidentallyAddedJob($command->jobId);
$this->repository->save($jobSeeker);
}
}