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Editing: MessagePart.php
<?php declare (strict_types=1); namespace WordPress\AiClient\Messages\DTO; use WordPress\AiClient\Common\AbstractDataTransferObject; use WordPress\AiClient\Common\Exception\InvalidArgumentException; use WordPress\AiClient\Common\Exception\RuntimeException; use WordPress\AiClient\Files\DTO\File; use WordPress\AiClient\Messages\Enums\MessagePartChannelEnum; use WordPress\AiClient\Messages\Enums\MessagePartTypeEnum; use WordPress\AiClient\Tools\DTO\FunctionCall; use WordPress\AiClient\Tools\DTO\FunctionResponse; /** * Represents a part of a message. * * Messages can contain multiple parts of different types, such as text, files, * function calls, etc. This DTO encapsulates one such part. * * @since 0.1.0 * * @phpstan-import-type FileArrayShape from File * @phpstan-import-type FunctionCallArrayShape from FunctionCall * @phpstan-import-type FunctionResponseArrayShape from FunctionResponse * * @phpstan-type MessagePartArrayShape array{ * channel: string, * type: string, * thoughtSignature?: string, * text?: string, * file?: FileArrayShape, * functionCall?: FunctionCallArrayShape, * functionResponse?: FunctionResponseArrayShape * } * * @extends AbstractDataTransferObject<MessagePartArrayShape> */ class MessagePart extends AbstractDataTransferObject { public const KEY_CHANNEL = 'channel'; public const KEY_TYPE = 'type'; public const KEY_THOUGHT_SIGNATURE = 'thoughtSignature'; public const KEY_TEXT = 'text'; public const KEY_FILE = 'file'; public const KEY_FUNCTION_CALL = 'functionCall'; public const KEY_FUNCTION_RESPONSE = 'functionResponse'; /** * @var MessagePartChannelEnum The channel this message part belongs to. */ private MessagePartChannelEnum $channel; /** * @var MessagePartTypeEnum The type of this message part. */ private MessagePartTypeEnum $type; /** * @var string|null Thought signature for extended thinking. */ private ?string $thoughtSignature = null; /** * @var string|null Text content (when type is TEXT). */ private ?string $text = null; /** * @var File|null File data (when type is FILE). */ private ?File $file = null; /** * @var FunctionCall|null Function call request (when type is FUNCTION_CALL). */ private ?FunctionCall $functionCall = null; /** * @var FunctionResponse|null Function response (when type is FUNCTION_RESPONSE). */ private ?FunctionResponse $functionResponse = null; /** * Constructor that accepts various content types and infers the message part type. * * @since 0.1.0 * * @param mixed $content The content of this message part. * @param MessagePartChannelEnum|null $channel The channel this part belongs to. Defaults to CONTENT. * @param string|null $thoughtSignature Optional thought signature for extended thinking. * @throws InvalidArgumentException If an unsupported content type is provided. */ public function __construct($content, ?MessagePartChannelEnum $channel = null, ?string $thoughtSignature = null) { $this->channel = $channel ?? MessagePartChannelEnum::content(); $this->thoughtSignature = $thoughtSignature; if (is_string($content)) { $this->type = MessagePartTypeEnum::text(); $this->text = $content; } elseif ($content instanceof File) { $this->type = MessagePartTypeEnum::file(); $this->file = $content; } elseif ($content instanceof FunctionCall) { $this->type = MessagePartTypeEnum::functionCall(); $this->functionCall = $content; } elseif ($content instanceof FunctionResponse) { $this->type = MessagePartTypeEnum::functionResponse(); $this->functionResponse = $content; } else { $type = is_object($content) ? get_class($content) : gettype($content); throw new InvalidArgumentException(sprintf('Unsupported content type %s. Expected string, File, ' . 'FunctionCall, or FunctionResponse.', $type)); } } /** * Gets the channel this message part belongs to. * * @since 0.1.0 * * @return MessagePartChannelEnum The channel. */ public function getChannel(): MessagePartChannelEnum { return $this->channel; } /** * Gets the type of this message part. * * @since 0.1.0 * * @return MessagePartTypeEnum The type. */ public function getType(): MessagePartTypeEnum { return $this->type; } /** * Gets the thought signature. * * @since 1.3.0 * * @return string|null The thought signature or null if not set. */ public function getThoughtSignature(): ?string { return $this->thoughtSignature; } /** * Gets the text content. * * @since 0.1.0 * * @return string|null The text content or null if not a text part. */ public function getText(): ?string { return $this->text; } /** * Gets the file. * * @since 0.1.0 * * @return File|null The file or null if not a file part. */ public function getFile(): ?File { return $this->file; } /** * Gets the function call. * * @since 0.1.0 * * @return FunctionCall|null The function call or null if not a function call part. */ public function getFunctionCall(): ?FunctionCall { return $this->functionCall; } /** * Gets the function response. * * @since 0.1.0 * * @return FunctionResponse|null The function response or null if not a function response part. */ public function getFunctionResponse(): ?FunctionResponse { return $this->functionResponse; } /** * {@inheritDoc} * * @since 0.1.0 */ public static function getJsonSchema(): array { $channelSchema = ['type' => 'string', 'enum' => MessagePartChannelEnum::getValues(), 'description' => 'The channel this message part belongs to.']; $thoughtSignatureSchema = ['type' => 'string', 'description' => 'Thought signature for extended thinking.']; return ['oneOf' => [['type' => 'object', 'properties' => [self::KEY_CHANNEL => $channelSchema, self::KEY_TYPE => ['type' => 'string', 'const' => MessagePartTypeEnum::text()->value], self::KEY_TEXT => ['type' => 'string', 'description' => 'Text content.'], self::KEY_THOUGHT_SIGNATURE => $thoughtSignatureSchema], 'required' => [self::KEY_TYPE, self::KEY_TEXT], 'additionalProperties' => \false], ['type' => 'object', 'properties' => [self::KEY_CHANNEL => $channelSchema, self::KEY_TYPE => ['type' => 'string', 'const' => MessagePartTypeEnum::file()->value], self::KEY_FILE => File::getJsonSchema(), self::KEY_THOUGHT_SIGNATURE => $thoughtSignatureSchema], 'required' => [self::KEY_TYPE, self::KEY_FILE], 'additionalProperties' => \false], ['type' => 'object', 'properties' => [self::KEY_CHANNEL => $channelSchema, self::KEY_TYPE => ['type' => 'string', 'const' => MessagePartTypeEnum::functionCall()->value], self::KEY_FUNCTION_CALL => FunctionCall::getJsonSchema(), self::KEY_THOUGHT_SIGNATURE => $thoughtSignatureSchema], 'required' => [self::KEY_TYPE, self::KEY_FUNCTION_CALL], 'additionalProperties' => \false], ['type' => 'object', 'properties' => [self::KEY_CHANNEL => $channelSchema, self::KEY_TYPE => ['type' => 'string', 'const' => MessagePartTypeEnum::functionResponse()->value], self::KEY_FUNCTION_RESPONSE => FunctionResponse::getJsonSchema(), self::KEY_THOUGHT_SIGNATURE => $thoughtSignatureSchema], 'required' => [self::KEY_TYPE, self::KEY_FUNCTION_RESPONSE], 'additionalProperties' => \false]]]; } /** * {@inheritDoc} * * @since 0.1.0 * * @return MessagePartArrayShape */ public function toArray(): array { $data = [self::KEY_CHANNEL => $this->channel->value, self::KEY_TYPE => $this->type->value]; if ($this->text !== null) { $data[self::KEY_TEXT] = $this->text; } elseif ($this->file !== null) { $data[self::KEY_FILE] = $this->file->toArray(); } elseif ($this->functionCall !== null) { $data[self::KEY_FUNCTION_CALL] = $this->functionCall->toArray(); } elseif ($this->functionResponse !== null) { $data[self::KEY_FUNCTION_RESPONSE] = $this->functionResponse->toArray(); } else { throw new RuntimeException('MessagePart requires one of: text, file, functionCall, or functionResponse. ' . 'This should not be a possible condition.'); } if ($this->thoughtSignature !== null) { $data[self::KEY_THOUGHT_SIGNATURE] = $this->thoughtSignature; } return $data; } /** * {@inheritDoc} * * @since 0.1.0 */ public static function fromArray(array $array): self { if (isset($array[self::KEY_CHANNEL])) { $channel = MessagePartChannelEnum::from($array[self::KEY_CHANNEL]); } else { $channel = null; } $thoughtSignature = $array[self::KEY_THOUGHT_SIGNATURE] ?? null; // Check which properties are set to determine how to construct the MessagePart if (isset($array[self::KEY_TEXT])) { return new self($array[self::KEY_TEXT], $channel, $thoughtSignature); } elseif (isset($array[self::KEY_FILE])) { return new self(File::fromArray($array[self::KEY_FILE]), $channel, $thoughtSignature); } elseif (isset($array[self::KEY_FUNCTION_CALL])) { return new self(FunctionCall::fromArray($array[self::KEY_FUNCTION_CALL]), $channel, $thoughtSignature); } elseif (isset($array[self::KEY_FUNCTION_RESPONSE])) { return new self(FunctionResponse::fromArray($array[self::KEY_FUNCTION_RESPONSE]), $channel, $thoughtSignature); } else { throw new InvalidArgumentException('MessagePart requires one of: text, file, functionCall, or functionResponse.'); } } /** * Performs a deep clone of the message part. * * This method ensures that nested objects (file, function call, function response) * are cloned to prevent modifications to the cloned part from affecting the original. * * @since 0.4.2 */ public function __clone() { if ($this->file !== null) { $this->file = clone $this->file; } if ($this->functionCall !== null) { $this->functionCall = clone $this->functionCall; } if ($this->functionResponse !== null) { $this->functionResponse = clone $this->functionResponse; } } }
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