47 lines
1.4 KiB
PHP
47 lines
1.4 KiB
PHP
<?php
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declare(strict_types=1);
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namespace KTXF\Preview;
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use Closure;
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use InvalidArgumentException;
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use KTXF\Resource\BinaryResource;
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final readonly class PreviewSource
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{
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public string $mimeType;
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/**
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* @param Closure(): BinaryResource $resourceFactory
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*/
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public function __construct(
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public string $sourceType,
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public string $identity,
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public string $signature,
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string $mimeType,
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public ?int $size,
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public Closure $resourceFactory,
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) {
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if (preg_match('/^[a-z][a-z0-9-]*$/', $this->sourceType) !== 1) {
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throw new InvalidArgumentException('Preview source type must use lowercase letters, numbers, and hyphens');
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}
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if ($this->identity === '' || $this->signature === '') {
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throw new InvalidArgumentException('Preview sources require an identity and content signature');
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}
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if ($this->size !== null && $this->size < 0) {
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throw new InvalidArgumentException('Preview source size cannot be negative');
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}
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$this->mimeType = MimeType::normalize($mimeType);
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}
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public function open(): BinaryResource
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{
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$resource = ($this->resourceFactory)();
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if (!$resource instanceof BinaryResource) {
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throw new PreviewGenerationException('Preview source factory did not return a BinaryResource');
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}
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return $resource;
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}
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}
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