Completed
Push — feature-output-formats ( 361247...47e05f )
by Arnaud
02:09
created

Alias::getPageAliases()   A

Complexity

Conditions 4
Paths 8

Size

Total Lines 16

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 16
rs 9.7333
c 0
b 0
f 0
cc 4
nc 8
nop 1
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<?php
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/*
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 * Copyright (c) Arnaud Ligny <[email protected]>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace Cecil\Generator;
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use Cecil\Collection\Page\Collection as PagesCollection;
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use Cecil\Collection\Page\Page;
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/**
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 * Class Alias.
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 */
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class Alias extends AbstractGenerator implements GeneratorInterface
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{
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    /**
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     * {@inheritdoc}
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     */
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    public function generate(PagesCollection $pagesCollection, \Closure $messageCallback)
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    {
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        $generatedPages = new PagesCollection();
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        /* @var $page Page */
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        foreach ($pagesCollection as $page) {
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            $aliases = $this->getPageAliases($page);
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            if (!empty($aliases)) {
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                foreach ($aliases as $alias) {
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                    /* @var $aliasPage Page */
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                    $pageId = $path = Page::slugify($alias);
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                    $aliasPage = (new Page())
0 ignored issues
show
Bug introduced by
It seems like you code against a specific sub-type and not the parent class Cecil\Collection\Item as the method setPath() does only exist in the following sub-classes of Cecil\Collection\Item: Cecil\Collection\Page\Page. Maybe you want to instanceof check for one of these explicitly?

Let’s take a look at an example:

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

class MyUser extends 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 sub-classes 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 parent class:

    abstract class User
    {
        /** @return string */
        abstract public function getPassword();
    
        /** @return string */
        abstract public function getDisplayName();
    }
    
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                        ->setId($pageId)
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                        ->setPath($path)
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                        ->setVariables([
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                            'layout'   => 'redirect',
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                            'redirect' => $page->getPath(),
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                            'title'    => $alias,
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                            'date'     => $page->getVariable('date'),
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                        ]);
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                    $generatedPages->add($aliasPage);
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                }
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            }
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        }
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        return $generatedPages;
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    }
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    /**
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     * Return aliases array.
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     *
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     * @param Page $page
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     *
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     * @return array
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     */
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    protected function getPageAliases(Page $page): array
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    {
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        $aliases = [];
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        if ($page->hasVariable('aliases')) { // backward compatibility
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            $aliases = $page->getVariable('aliases');
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        }
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        if ($page->hasVariable('alias')) {
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            $aliases = $page->getVariable('alias');
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        }
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        if (!is_array($aliases)) {
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            $aliases = [$aliases];
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        }
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        return $aliases;
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    }
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}
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