Completed
Push — feature/update-inst-conf-aggre... ( 8277a8...d31c76 )
by Michiel
04:24 queued 01:42
created

InstitutionSet::__construct()   A

Complexity

Conditions 3
Paths 2

Size

Total Lines 24

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 24
rs 9.536
c 0
b 0
f 0
cc 3
nc 2
nop 1
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<?php
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/**
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 * Copyright 2018 SURFnet B.V.
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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namespace Surfnet\Stepup\Configuration\Value;
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use ArrayIterator;
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use IteratorAggregate;
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use JsonSerializable;
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use Surfnet\Stepup\Exception\InvalidArgumentException;
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final class InstitutionSet implements JsonSerializable, IteratorAggregate
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{
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    /**
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     * @var array
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     */
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    private $institutionSet;
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    /**
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     * @param Institution[]
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     */
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    public function __construct(array $institutions)
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    {
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        // Verify only Institution value objects are collected in the set
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        array_walk(
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            $institutions,
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            function ($institution, $key) use ($institutions) {
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                if (!$institution instanceof Institution) {
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                    throw InvalidArgumentException::invalidType(
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                        Institution::class,
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                        'institutions',
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                        $institutions[$key]
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                    );
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                }
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            }
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        );
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        // Normalize (lowercase) the institutions for the test on unique entries below.
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        $institutionsLowerCased = array_map('strtolower', $institutions);
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        if ($institutionsLowerCased !== array_unique($institutionsLowerCased)) {
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            throw new InvalidArgumentException('Duplicate entries are not allowed in the InstitutionSet');
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        }
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        $this->institutionSet = $institutions;
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    }
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    public static function fromInstitutionConfig(array $institutions)
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    {
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        if (empty($institutions)) {
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            return new self($institutions);
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        }
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        $set = [];
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        foreach ($institutions as $institutionTitle) {
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            $set[] = new Institution($institutionTitle);
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        }
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        return new self($set);
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    }
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    public function equals(InstitutionSet $other)
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    {
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        // Compare the institution values of the sets
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        $currentValues = $this->toScalarArray();
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        $otherValues = $other->toScalarArray();
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        return $currentValues === $otherValues;
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    }
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    /**
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     * Return an array of institution values represented by their string value
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     */
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    public function toScalarArray()
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    {
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        return array_map('strval', $this->toArray());
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    }
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    private function toArray()
0 ignored issues
show
Documentation introduced by
The return type could not be reliably inferred; please add a @return annotation.

Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a @return annotation as described here.

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    {
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        return $this->getIterator()->getArrayCopy();
0 ignored issues
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Bug introduced by
It seems like you code against a concrete implementation and not the interface Traversable as the method getArrayCopy() does only exist in the following implementations of said interface: ArrayIterator, ArrayObject, DoctrineTest\Instantiato...tAsset\ArrayObjectAsset, DoctrineTest\Instantiato...lizableArrayObjectAsset, DoctrineTest\Instantiato...ceptionArrayObjectAsset, DoctrineTest\Instantiato...sset\WakeUpNoticesAsset, Issue523, RecursiveArrayIterator, Symfony\Component\Finder...rator\InnerNameIterator, Symfony\Component\Finder...rator\InnerSizeIterator, Symfony\Component\Finder...rator\InnerTypeIterator, Symfony\Component\Finder...or\MockFileListIterator, Symfony\Component\Form\E...r\ViolationPathIterator, Symfony\Component\Proper...ss\PropertyPathIterator, Symfony\Component\VarDum...\Caster\MyArrayIterator, Zend\Code\Annotation\AnnotationCollection, Zend\Code\Scanner\AnnotationScanner.

Let’s take a look at an example:

interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}

In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.

Available Fixes

  1. Change the type-hint for the parameter:

    class AuthSystem
    {
        public function authenticate(MyUser $user) { /* ... */ }
    }
    
  2. Add an additional type-check:

    class AuthSystem
    {
        public function authenticate(User $user)
        {
            if ($user instanceof MyUser) {
                $this->logger->info(/** ... */);
            }
    
            // or alternatively
            if ( ! $user instanceof MyUser) {
                throw new \LogicException(
                    '$user must be an instance of MyUser, '
                   .'other instances are not supported.'
                );
            }
    
        }
    }
    
Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case.
  1. Add the method to the interface:

    interface User
    {
        /** @return string */
        public function getPassword();
    
        /** @return string */
        public function getDisplayName();
    }
    
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    }
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    public function jsonSerialize()
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    {
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        return $this->institutionSet;
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    }
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    public function getIterator()
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    {
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        return new ArrayIterator($this->institutionSet);
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    }
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}
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