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<?php |
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namespace eZ\Publish\Core\Repository\Strategy\ContentThumbnail; |
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use eZ\Publish\API\Repository\FieldTypeService; |
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use eZ\Publish\API\Repository\Values\Content\Content; |
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use eZ\Publish\API\Repository\Values\Content\Field; |
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use eZ\Publish\API\Repository\Values\Content\Thumbnail; |
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use eZ\Publish\API\Repository\Values\ContentType\ContentType; |
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use eZ\Publish\SPI\Repository\Strategy\ContentThumbnail\Field\ThumbnailStrategy as ContentFieldThumbnailStrategy; |
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use eZ\Publish\SPI\Repository\Strategy\ContentThumbnail\ThumbnailStrategy; |
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use eZ\Publish\SPI\Variation\Values\ImageVariation; |
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class FirstMatchingFieldStrategy implements ThumbnailStrategy |
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{ |
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/** @var \eZ\Publish\API\Repository\FieldTypeService */ |
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private $fieldTypeService; |
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/** @var \eZ\Publish\SPI\Repository\Strategy\ContentThumbnail\Field\ThumbnailStrategy */ |
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private $contentFieldStrategy; |
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public function __construct( |
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ContentFieldThumbnailStrategy $contentFieldStrategy, |
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FieldTypeService $fieldTypeService |
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) { |
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$this->contentFieldStrategy = $contentFieldStrategy; |
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$this->fieldTypeService = $fieldTypeService; |
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} |
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public function getThumbnail(ContentType $contentType, array $fields): ?Thumbnail |
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{ |
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$fieldDefinitions = $contentType->getFieldDefinitions(); |
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foreach ($fieldDefinitions as $fieldDefinition) { |
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$field = $this->getFieldByIdentifier($fieldDefinition->identifier, $fields); |
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if ($field === null) { |
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continue; |
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} |
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$fieldType = $this->fieldTypeService->getFieldType($fieldDefinition->fieldTypeIdentifier); |
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if ( |
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$fieldDefinition->isThumbnail |
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&& $this->contentFieldStrategy->hasStrategy($field->fieldTypeIdentifier) |
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&& !$fieldType->isEmptyValue($field->value) |
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) { |
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return $this->contentFieldStrategy->getThumbnail($field); |
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} |
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} |
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return null; |
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} |
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private function getFieldByIdentifier(string $identifier, array $fields): ?Field |
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{ |
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/** @var \eZ\Publish\API\Repository\Values\Content\Field $field */ |
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foreach ($fields as $field) { |
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if ($field->fieldDefIdentifier === $identifier) { |
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return $field; |
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} |
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} |
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return null; |
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} |
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} |
Let’s take a look at an example:
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
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: