AggregateRepository::getChildEntitiesByType() - Code Metrics - Inspection of "Merge pull request #21 from matthiasnoback/require..." - matthiasnoback/TalisORM - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 7c6dec...eed99e )

by Matthias

created 2018-10-24 18:03 UTC

AggregateRepository::getChildEntitiesByType() A

↳ Parent: AggregateRepository

Complexity

Conditions	2
Paths	2

Size

Total Lines	19
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	13
CRAP Score	2

Importance

Changes

Metric	Value
cc	2
eloc	10
nc	2
nop	2
dl	0
loc	19
ccs	13
cts	13
cp	1
crap	2
rs	9.9332
c	0
b	0
f	0

<?php

namespace TalisOrm;

use Doctrine\DBAL\Connection;
use Doctrine\DBAL\Driver\ResultStatement;
use InvalidArgumentException;
use function is_a;
use LogicException;
use PDO;
use TalisOrm\DomainEvents\EventDispatcher;
use Webmozart\Assert\Assert;

final class AggregateRepository
{
    /**
     * @var Connection
     */
    private $connection;

    /**
     * @var EventDispatcher
     */
    private $eventDispatcher;

    public function __construct(Connection $connection, EventDispatcher $eventDispatcher)
    {
        $this->connection = $connection;
        $this->eventDispatcher = $eventDispatcher;
    }

    /**
     * @param Aggregate $aggregate
     * @throws ConcurrentUpdateOccurred (only when you use optimistic concurrency locking)
     * @return void
     */
    public function save(Aggregate $aggregate)
    {
        $this->connection->transactional(function () use ($aggregate) {
            $this->insertOrUpdate($aggregate);

            foreach ($aggregate->deletedChildEntities() as $childEntity) {
                $this->connection->delete(
                    $this->connection->quoteIdentifier($childEntity::tableName()),
                    $childEntity->identifier()
                );
            }

            foreach ($aggregate->childEntitiesByType() as $type => $childEntities) {
                foreach ($childEntities as $childEntity) {
                    $this->insertOrUpdate($childEntity);
                }
            }
        });

        $this->eventDispatcher->dispatch($aggregate->releaseEvents());
    }

    /**
     * @param string $aggregateClass
     * @param AggregateId $aggregateId
     * @return Aggregate
     */
    public function getById($aggregateClass, AggregateId $aggregateId)
    {
        Assert::string($aggregateClass);

        if (!is_a($aggregateClass, Aggregate::class, true)) {
            throw new InvalidArgumentException(sprintf(
                'Class "%s" has to implement "%s"',
                $aggregateClass,
                Aggregate::class
            ));
        }

        $aggregateState = $this->getAggregateState($aggregateClass, $aggregateId);

        $childEntitiesByType = $this->getChildEntitiesByType($aggregateClass, $aggregateId);

        $aggregate = $aggregateClass::fromState($aggregateState, $childEntitiesByType);

        if (!$aggregate instanceof $aggregateClass || !$aggregate instanceof Aggregate) {
            throw new LogicException(sprintf(
                'Method "%s::fromState()" was expected to return an instance of "%1$s"',
                $aggregateClass
            ));
        }

        return $aggregate;
    }

    /**
     * @param string $aggregateClass
     * @param AggregateId $aggregateId
     * @return array
     */
    private function getAggregateState($aggregateClass, AggregateId $aggregateId)
    {
        $aggregateStates = $this->fetchAll(
            $aggregateClass::tableName(),
            $aggregateClass::identifierForQuery($aggregateId)
        );

        if (\count($aggregateStates) === 0) {
            throw new AggregateNotFoundException(sprintf(
                'Could not find aggregate of type "%s" with id "%s"',
                $aggregateClass,
                $aggregateId
            ));
        }

        $aggregateState = reset($aggregateStates);

        Assert::isArray($aggregateState);

        return $aggregateState;
    }

    /**
     * @param string $aggregateClass
     * @param AggregateId $aggregateId
     * @return array[]
     */
    private function getChildEntitiesByType($aggregateClass, AggregateId $aggregateId)
    {
        $childEntitiesByType = [];

        foreach ($aggregateClass::childEntityTypes() as $childEntityType) {
            $childEntityStates = $this->fetchAll(
                $childEntityType::tableName(),
                $childEntityType::identifierForQuery($aggregateId)
            );

            $childEntitiesByType[$childEntityType] = array_map(
                function (array $childEntityState) use ($childEntityType) {
                    return $childEntityType::fromState($childEntityState);
                },
                $childEntityStates
            );
        }

        return $childEntitiesByType;
    }

    public function delete(Aggregate $aggregate)
    {
        $this->connection->transactional(function () use ($aggregate) {
            $this->connection->delete(
                $this->connection->quoteIdentifier($aggregate::tableName()),
                $aggregate->identifier()
            );

            foreach ($aggregate->childEntitiesByType() as $type => $childEntities) {
                foreach ($childEntities as $childEntity) {
                    /** @var ChildEntity $childEntity */
                    $this->connection->delete(
                        $this->connection->quoteIdentifier($childEntity::tableName()),
                        $childEntity->identifier()
                    );
                }
            }
        });
    }

    private function insertOrUpdate(Entity $entity)
    {
        if ($entity->isNew()) {
            $this->connection->insert(
                $this->connection->quoteIdentifier($entity::tableName()),
                $entity->state()
            );
        } else {
            $state = $entity->state();
            if (array_key_exists(Aggregate::VERSION_COLUMN, $state)) {
                $aggregateVersion = $state[Aggregate::VERSION_COLUMN];
                $aggregateVersionInDb = (int)$this->select(
                    Aggregate::VERSION_COLUMN,
                    $entity->tableName(),
                    $entity->identifier()
                )->fetchColumn();
                if ($aggregateVersionInDb >= $aggregateVersion) {
                    throw ConcurrentUpdateOccurred::ofEntity($entity);
                }
            }
            $this->connection->update(
                $this->connection->quoteIdentifier($entity::tableName()),
                $state,
                $entity->identifier()
            );
        }
    }

    /**
     * @param string $tableName
     * @param array $identifier
     * @return array[]
     */
    private function fetchAll($tableName, array $identifier)
    {
        Assert::string($tableName);

        return $this->select('*', $tableName, $identifier)->fetchAll(PDO::FETCH_ASSOC);
    }

    /**
     * This method might have been on Connection itself...
     *
     * @param string $selectExpression
     * @param string $tableExpression
     * @param array $where
     * @return ResultStatement
     */
    private function select($selectExpression, $tableExpression, array $where)
    {
        Assert::string($selectExpression);
        Assert::string($tableExpression);

        $conditions = [];
        $values = [];
        foreach ($where as $columnName => $value) {
            $conditions[] = $columnName . ' = ?';
            $values[] = $value;
        }

        $sql = 'SELECT ' . $selectExpression
            . ' FROM ' . $this->connection->quoteIdentifier($tableExpression)
            . ' WHERE ' . implode(' AND ', $conditions);

        return $this->connection->executeQuery($sql, $values);
    }
}


1		<?php
2
3		namespace TalisOrm;
4
5		use Doctrine\DBAL\Connection;
6		use Doctrine\DBAL\Driver\ResultStatement;
7		use InvalidArgumentException;
8		use function is_a;
9		use LogicException;
10		use PDO;
11		use TalisOrm\DomainEvents\EventDispatcher;
12		use Webmozart\Assert\Assert;
13
14		final class AggregateRepository
15		{
16		/**
17		* @var Connection
18		*/
19		private $connection;
20
21		/**
22		* @var EventDispatcher
23		*/
24		private $eventDispatcher;
25
26	24	public function __construct(Connection $connection, EventDispatcher $eventDispatcher)
27		{
28	24	$this->connection = $connection;
29	24	$this->eventDispatcher = $eventDispatcher;
30	24	}
31
32		/**
33		* @param Aggregate $aggregate
34		* @throws ConcurrentUpdateOccurred (only when you use optimistic concurrency locking)
35		* @return void
36		*/
37	23	public function save(Aggregate $aggregate)
38		{
39		$this->connection->transactional(function () use ($aggregate) {
40	23	$this->insertOrUpdate($aggregate);
41
42	23	foreach ($aggregate->deletedChildEntities() as $childEntity) {
43	2	$this->connection->delete(
44	2	$this->connection->quoteIdentifier($childEntity::tableName()),
45	2	$childEntity->identifier()
46	2	);
47	23	}
48
49	23	foreach ($aggregate->childEntitiesByType() as $type => $childEntities) {
50	22	foreach ($childEntities as $childEntity) {
51	10	$this->insertOrUpdate($childEntity);
52	22	}
53	23	}
54	23	});
55
56	23	$this->eventDispatcher->dispatch($aggregate->releaseEvents());
57	23	}
58
59		/**
60		* @param string $aggregateClass
61		* @param AggregateId $aggregateId
62		* @return Aggregate
63		*/
64	22	public function getById($aggregateClass, AggregateId $aggregateId)
65		{
66	22	Assert::string($aggregateClass);
67
68	22	if (!is_a($aggregateClass, Aggregate::class, true)) {
69	1	throw new InvalidArgumentException(sprintf(
70	1	'Class "%s" has to implement "%s"',
71	1	$aggregateClass,
72		Aggregate::class
73	1	));
74		}
75
76	21	$aggregateState = $this->getAggregateState($aggregateClass, $aggregateId);
77
78	19	$childEntitiesByType = $this->getChildEntitiesByType($aggregateClass, $aggregateId);
79
80	19	$aggregate = $aggregateClass::fromState($aggregateState, $childEntitiesByType);
81
82	19	if (!$aggregate instanceof $aggregateClass \|\| !$aggregate instanceof Aggregate) {
83	1	throw new LogicException(sprintf(
84	1	'Method "%s::fromState()" was expected to return an instance of "%1$s"',
85		$aggregateClass
86	1	));
87		}
88
89	18	return $aggregate;
90		}
91
92		/**
93		* @param string $aggregateClass
94		* @param AggregateId $aggregateId
95		* @return array
96		*/
97	21	private function getAggregateState($aggregateClass, AggregateId $aggregateId)
98		{
99	21	$aggregateStates = $this->fetchAll(
100	21	$aggregateClass::tableName(),
101	21	$aggregateClass::identifierForQuery($aggregateId)
102	21	);
103
104	21	if (\count($aggregateStates) === 0) {
105	4	throw new AggregateNotFoundException(sprintf(
106	4	'Could not find aggregate of type "%s" with id "%s"',
107	4	$aggregateClass,
108		$aggregateId
109	4	));
110		}
111
112	19	$aggregateState = reset($aggregateStates);
113
114	19	Assert::isArray($aggregateState);
115
116	19	return $aggregateState;
117		}
118
119		/**
120		* @param string $aggregateClass
121		* @param AggregateId $aggregateId
122		* @return array[]
123		*/
124	19	private function getChildEntitiesByType($aggregateClass, AggregateId $aggregateId)
125		{
126	19	$childEntitiesByType = [];
127
128	19	foreach ($aggregateClass::childEntityTypes() as $childEntityType) {
129	18	$childEntityStates = $this->fetchAll(
130	18	$childEntityType::tableName(),
131	18	$childEntityType::identifierForQuery($aggregateId)
132	18	);
133
134	18	$childEntitiesByType[$childEntityType] = array_map(
135		function (array $childEntityState) use ($childEntityType) {
136	8	return $childEntityType::fromState($childEntityState);
137	18	},
138		$childEntityStates
139	18	);
140	19	}
141
142	19	return $childEntitiesByType;
143		}
144
145		public function delete(Aggregate $aggregate)
146		{
147	4	$this->connection->transactional(function () use ($aggregate) {
148	4	$this->connection->delete(
149	4	$this->connection->quoteIdentifier($aggregate::tableName()),
150	4	$aggregate->identifier()
151	4	);
152
153	4	foreach ($aggregate->childEntitiesByType() as $type => $childEntities) {
154	4	foreach ($childEntities as $childEntity) {
155		/** @var ChildEntity $childEntity */
156	2	$this->connection->delete(
157	2	$this->connection->quoteIdentifier($childEntity::tableName()),
158	2	$childEntity->identifier()
159	2	);
160	4	}
161	4	}
162	4	});
163	4	}
164
165	23	private function insertOrUpdate(Entity $entity)
166		{
167	23	if ($entity->isNew()) {
168	23	$this->connection->insert(
169	23	$this->connection->quoteIdentifier($entity::tableName()),
170	23	$entity->state()
171	23	);
172	23	} else {
173	10	$state = $entity->state();
174	10	if (array_key_exists(Aggregate::VERSION_COLUMN, $state)) {
175	10	$aggregateVersion = $state[Aggregate::VERSION_COLUMN];
176	10	$aggregateVersionInDb = (int)$this->select(
177	10	Aggregate::VERSION_COLUMN,
178	10	$entity->tableName(),
179	10	$entity->identifier()
180	10	)->fetchColumn();
181	10	if ($aggregateVersionInDb >= $aggregateVersion) {
182	4	throw ConcurrentUpdateOccurred::ofEntity($entity);
183		}
184	10	}
185	10	$this->connection->update(
186	10	$this->connection->quoteIdentifier($entity::tableName()),
187	10	$state,
188	10	$entity->identifier()
189	10	);
190		}
191	23	}
192
193		/**
194		* @param string $tableName
195		* @param array $identifier
196		* @return array[]
197		*/
198	21	private function fetchAll($tableName, array $identifier)
199		{
200	21	Assert::string($tableName);
201
202	21	return $this->select('*', $tableName, $identifier)->fetchAll(PDO::FETCH_ASSOC);
203		}
204
205		/**
206		* This method might have been on Connection itself...
207		*
208		* @param string $selectExpression
209		* @param string $tableExpression
210		* @param array $where
211		* @return ResultStatement
212		*/
213	21	private function select($selectExpression, $tableExpression, array $where)
214		{
215	21	Assert::string($selectExpression);
216	21	Assert::string($tableExpression);
217
218	21	$conditions = [];
219	21	$values = [];
220	21	foreach ($where as $columnName => $value) {
221	21	$conditions[] = $columnName . ' = ?';
222	21	$values[] = $value;
223	21	}
224
225		$sql = 'SELECT ' . $selectExpression
226	21	. ' FROM ' . $this->connection->quoteIdentifier($tableExpression)
227	21	. ' WHERE ' . implode(' AND ', $conditions);
228
229	21	return $this->connection->executeQuery($sql, $values);
230		}
231		}
232

matthiasnoback / TalisORM

Push — master ( 7c6dec...eed99e )

AggregateRepository::getChildEntitiesByType() A

Complexity

Size

Duplication

Code Coverage

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