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php-ai-client
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Files
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DTO
<?php declare (strict_types=1); namespace WordPress\AiClient\Files\DTO; use WordPress\AiClient\Common\AbstractDataTransferObject; use WordPress\AiClient\Common\Exception\InvalidArgumentException; use WordPress\AiClient\Common\Exception\RuntimeException; use WordPress\AiClient\Files\Enums\FileTypeEnum; use WordPress\AiClient\Files\ValueObjects\MimeType; /** * Represents a file in the AI client. * * This DTO automatically detects whether a file is a URL, base64 data, or local file path * and handles them appropriately. * * @since 0.1.0 * * @phpstan-type FileArrayShape array{ * fileType: string, * url?: string, * mimeType: string, * base64Data?: string * } * * @extends AbstractDataTransferObject<FileArrayShape> */ class File extends AbstractDataTransferObject { public const KEY_FILE_TYPE = 'fileType'; public const KEY_MIME_TYPE = 'mimeType'; public const KEY_URL = 'url'; public const KEY_BASE64_DATA = 'base64Data'; /** * @var MimeType The MIME type of the file. */ private MimeType $mimeType; /** * @var FileTypeEnum The type of file storage. */ private FileTypeEnum $fileType; /** * @var string|null The URL for remote files. */ private ?string $url = null; /** * @var string|null The base64 data for inline files. */ private ?string $base64Data = null; /** * Constructor. * * @since 0.1.0 * * @param string $file The file string (URL, base64 data, or local path). * @param string|null $mimeType The MIME type of the file (optional). * @throws InvalidArgumentException If the file format is invalid or MIME type cannot be determined. */ public function __construct(string $file, ?string $mimeType = null) { // Detect and process the file type (will set MIME type if possible) $this->detectAndProcessFile($file, $mimeType); } /** * Detects the file type and processes it accordingly. * * @since 0.1.0 * * @param string $file The file string to process. * @param string|null $providedMimeType The explicitly provided MIME type. * @throws InvalidArgumentException If the file format is invalid or MIME type cannot be determined. */ private function detectAndProcessFile(string $file, ?string $providedMimeType): void { // Check if it's a URL if ($this->isUrl($file)) { $this->fileType = FileTypeEnum::remote(); $this->url = $file; $this->mimeType = $this->determineMimeType($providedMimeType, null, $file); return; } // Data URI pattern. $dataUriPattern = '/^data:(?:([a-zA-Z0-9][a-zA-Z0-9!#$&\-\^_+.]*\/[a-zA-Z0-9][a-zA-Z0-9!#$&\-\^_+.]*' . '(?:;[a-zA-Z0-9\-]+=[a-zA-Z0-9\-]+)*)?;)?base64,([A-Za-z0-9+\/]*={0,2})$/'; // Check if it's a data URI. if (preg_match($dataUriPattern, $file, $matches)) { $this->fileType = FileTypeEnum::inline(); $this->base64Data = $matches[2]; // Extract just the base64 data $extractedMimeType = empty($matches[1]) ? null : $matches[1]; $this->mimeType = $this->determineMimeType($providedMimeType, $extractedMimeType, null); return; } // Check if it's a local file path (before base64 check) if (file_exists($file) && is_file($file)) { $this->fileType = FileTypeEnum::inline(); $this->base64Data = $this->convertFileToBase64($file); $this->mimeType = $this->determineMimeType($providedMimeType, null, $file); return; } // Check if it's plain base64 if (preg_match('/^[A-Za-z0-9+\/]*={0,2}$/', $file)) { if ($providedMimeType === null) { throw new InvalidArgumentException('MIME type is required when providing plain base64 data without data URI format.'); } $this->fileType = FileTypeEnum::inline(); $this->base64Data = $file; $this->mimeType = new MimeType($providedMimeType); return; } throw new InvalidArgumentException('Invalid file provided. Expected URL, base64 data, or valid local file path.'); } /** * Checks if a string is a valid URL. * * @since 0.1.0 * * @param string $string The string to check. * @return bool True if the string is a URL. */ private function isUrl(string $string): bool { return filter_var($string, \FILTER_VALIDATE_URL) !== \false && preg_match('/^https?:\/\//i', $string); } /** * Converts a local file to base64. * * @since 0.1.0 * * @param string $filePath The path to the local file. * @return string The base64-encoded file data. * @throws RuntimeException If the file cannot be read. */ private function convertFileToBase64(string $filePath): string { $fileContent = @file_get_contents($filePath); if ($fileContent === \false) { throw new RuntimeException(sprintf('Unable to read file: %s', $filePath)); } return base64_encode($fileContent); } /** * Gets the file type. * * @since 0.1.0 * * @return FileTypeEnum The file type. */ public function getFileType(): FileTypeEnum { return $this->fileType; } /** * Checks if the file is an inline file. * * @since 0.1.0 * * @return bool True if the file is inline (base64/data URI). */ public function isInline(): bool { return $this->fileType->isInline(); } /** * Checks if the file is a remote file. * * @since 0.1.0 * * @return bool True if the file is remote (URL). */ public function isRemote(): bool { return $this->fileType->isRemote(); } /** * Gets the URL for remote files. * * @since 0.1.0 * * @return string|null The URL, or null if not a remote file. */ public function getUrl(): ?string { return $this->url; } /** * Gets the base64-encoded data for inline files. * * @since 0.1.0 * * @return string|null The plain base64-encoded data (without data URI prefix), or null if not an inline file. */ public function getBase64Data(): ?string { return $this->base64Data; } /** * Gets the data as a data URI for inline files. * * @since 0.1.0 * * @return string|null The data URI in format: data:[mimeType];base64,[data], or null if not an inline file. */ public function getDataUri(): ?string { if ($this->base64Data === null) { return null; } return sprintf('data:%s;base64,%s', $this->getMimeType(), $this->base64Data); } /** * Gets the MIME type of the file as a string. * * @since 0.1.0 * * @return string The MIME type string value. */ public function getMimeType(): string { return (string) $this->mimeType; } /** * Gets the MIME type object. * * @since 0.1.0 * * @return MimeType The MIME type object. */ public function getMimeTypeObject(): MimeType { return $this->mimeType; } /** * Checks if the file is a video. * * @since 0.1.0 * * @return bool True if the file is a video. */ public function isVideo(): bool { return $this->mimeType->isVideo(); } /** * Checks if the file is an image. * * @since 0.1.0 * * @return bool True if the file is an image. */ public function isImage(): bool { return $this->mimeType->isImage(); } /** * Checks if the file is audio. * * @since 0.1.0 * * @return bool True if the file is audio. */ public function isAudio(): bool { return $this->mimeType->isAudio(); } /** * Checks if the file is text. * * @since 0.1.0 * * @return bool True if the file is text. */ public function isText(): bool { return $this->mimeType->isText(); } /** * Checks if the file is a document. * * @since 0.1.0 * * @return bool True if the file is a document. */ public function isDocument(): bool { return $this->mimeType->isDocument(); } /** * Checks if the file is a specific MIME type. * * @since 0.1.0 * * @param string $type The mime type to check (e.g. 'image', 'text', 'video', 'audio'). * * @return bool True if the file is of the specified type. */ public function isMimeType(string $type): bool { return $this->mimeType->isType($type); } /** * Determines the MIME type from various sources. * * @since 0.1.0 * * @param string|null $providedMimeType The explicitly provided MIME type. * @param string|null $extractedMimeType The MIME type extracted from data URI. * @param string|null $pathOrUrl The file path or URL to extract extension from. * @return MimeType The determined MIME type. * @throws InvalidArgumentException If MIME type cannot be determined. */ private function determineMimeType(?string $providedMimeType, ?string $extractedMimeType, ?string $pathOrUrl): MimeType { // Prefer explicitly provided MIME type if ($providedMimeType !== null) { return new MimeType($providedMimeType); } // Use extracted MIME type from data URI if ($extractedMimeType !== null) { return new MimeType($extractedMimeType); } // Try to determine from file extension if ($pathOrUrl !== null) { $parsedUrl = parse_url($pathOrUrl); $path = $parsedUrl['path'] ?? $pathOrUrl; // Remove query string and fragment if present $cleanPath = strtok($path, '?#'); if ($cleanPath === \false) { $cleanPath = $path; } $extension = pathinfo($cleanPath, \PATHINFO_EXTENSION); if (!empty($extension)) { try { return MimeType::fromExtension($extension); } catch (InvalidArgumentException $e) { // Extension not recognized, continue to error unset($e); } } } throw new InvalidArgumentException('Unable to determine MIME type. Please provide it explicitly.'); } /** * {@inheritDoc} * * @since 0.1.0 */ public static function getJsonSchema(): array { return ['type' => 'object', 'oneOf' => [['properties' => [self::KEY_FILE_TYPE => ['type' => 'string', 'const' => FileTypeEnum::REMOTE, 'description' => 'The file type.'], self::KEY_MIME_TYPE => ['type' => 'string', 'description' => 'The MIME type of the file.', 'pattern' => '^[a-zA-Z0-9][a-zA-Z0-9!#$&\-\^_+.]*\/[a-zA-Z0-9]' . '[a-zA-Z0-9!#$&\-\^_+.]*$'], self::KEY_URL => ['type' => 'string', 'format' => 'uri', 'description' => 'The URL to the remote file.']], 'required' => [self::KEY_FILE_TYPE, self::KEY_MIME_TYPE, self::KEY_URL]], ['properties' => [self::KEY_FILE_TYPE => ['type' => 'string', 'const' => FileTypeEnum::INLINE, 'description' => 'The file type.'], self::KEY_MIME_TYPE => ['type' => 'string', 'description' => 'The MIME type of the file.', 'pattern' => '^[a-zA-Z0-9][a-zA-Z0-9!#$&\-\^_+.]*\/[a-zA-Z0-9]' . '[a-zA-Z0-9!#$&\-\^_+.]*$'], self::KEY_BASE64_DATA => ['type' => 'string', 'description' => 'The base64-encoded file data.']], 'required' => [self::KEY_FILE_TYPE, self::KEY_MIME_TYPE, self::KEY_BASE64_DATA]]]]; } /** * {@inheritDoc} * * @since 0.1.0 * * @return FileArrayShape */ public function toArray(): array { $data = [self::KEY_FILE_TYPE => $this->fileType->value, self::KEY_MIME_TYPE => $this->getMimeType()]; if ($this->url !== null) { $data[self::KEY_URL] = $this->url; } elseif (!$this->fileType->isRemote() && $this->base64Data !== null) { $data[self::KEY_BASE64_DATA] = $this->base64Data; } else { throw new RuntimeException('File requires either url or base64Data. This should not be a possible condition.'); } return $data; } /** * {@inheritDoc} * * @since 0.1.0 */ public static function fromArray(array $array): self { static::validateFromArrayData($array, [self::KEY_FILE_TYPE]); // Check which properties are set to determine how to construct the File $mimeType = $array[self::KEY_MIME_TYPE] ?? null; if (isset($array[self::KEY_URL])) { return new self($array[self::KEY_URL], $mimeType); } elseif (isset($array[self::KEY_BASE64_DATA])) { return new self($array[self::KEY_BASE64_DATA], $mimeType); } else { throw new InvalidArgumentException('File requires either url or base64Data.'); } } /** * Performs a deep clone of the file. * * This method ensures that the MimeType value object is cloned to prevent * any shared references between the original and cloned file. * * @since 0.4.2 */ public function __clone() { $this->mimeType = clone $this->mimeType; } }
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