Unexpected behavior in getRegisteredNames()

[jimsafley]

Omeka\ServiceManager\AbstractPluginManager::getRegisteredNames()

The method says it "returns only the names that are registered in configuration as invokable classes and factories," but, if aliases are present in the configuration, their keys overwrite the corresponding factory keys.

Take the following:

'my_service' => [
    'factories' => [
        'foo' => 'bar',
    ],
    'aliases' => [
        'baz' => 'foo',
    ],
],

I expect $manager->getRegisteredNames() to return ['foo'] but instead it returns ['baz'].

[jimsafley]

For a practical example:

    'extract_text_extractors' => [
        'factories' => [
            'catdoc' => ExtractText\Service\Extractor\CatdocFactory::class,
            'docx2txt' => ExtractText\Service\Extractor\Docx2txtFactory::class,
            'lynx' => ExtractText\Service\Extractor\LynxFactory::class,
            'pdftotext' => ExtractText\Service\Extractor\PdftotextFactory::class,
        ],
        'invokables' => [
            'filegetcontents' => ExtractText\Extractor\Filegetcontents::class,
        ],
        'aliases' => [
            'application/msword' => 'catdoc',
            'application/pdf' => 'pdftotext',
            'application/rtf' => 'catdoc',
            'application/vnd.openxmlformats-officedocument.wordprocessingml.document' => 'docx2txt',
            'text/html' => 'lynx',
            'text/plain' => 'filegetcontents',
        ],
    ],

$manager->getRegisteredNames() returns:

[
    'application/msword',
    'application/pdf',
    'application/rtf',
    'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
    'text/html',
    'text/plain',
    'filegetcontents',
]

but I expect:

[
    'catdoc',
    'docx2txt',
    'lynx',
    'pdftotext',
    'filegetcontents',
]