Merge branch 'dto-serlialization' into extender-dtos

Author: JasonTheAdams

src/Files/DTO/File.php

@@ -403,10 +403,14 @@ public function toArray(): array
             'mimeType' => $this->getMimeType(),
         ];
 
-        if ($this->fileType->isRemote() && $this->url !== null) {
+        if ($this->url !== null) {
             $data['url'] = $this->url;
         } elseif ($this->base64Data !== null) {
             $data['base64Data'] = $this->base64Data;
+        } else {
+            throw new RuntimeException(
+                'File requires either url or base64Data. This should not be a possible condition.'
+            );
         }
 
         return $data;

src/Messages/DTO/Message.php

@@ -122,7 +122,7 @@ public function toArray(): array
      *
      * @since n.e.x.t
      *
-     * @return UserMessage|ModelMessage|SystemMessage
+     * @return Message The specific message class based on the role.
      */
     final public static function fromArray(array $array): Message
     {

src/Messages/DTO/MessagePart.php

@@ -5,6 +5,7 @@
 namespace WordPress\AiClient\Messages\DTO;
 
 use InvalidArgumentException;
+use RuntimeException;
 use WordPress\AiClient\Common\AbstractDataValueObject;
 use WordPress\AiClient\Files\DTO\File;
 use WordPress\AiClient\Messages\Enums\MessagePartTypeEnum;
@@ -229,14 +230,19 @@ public function toArray(): array
     {
         $data = ['type' => $this->type->value];
 
-        if ($this->type->isText() && $this->text !== null) {
+        if ($this->text !== null) {
             $data['text'] = $this->text;
-        } elseif ($this->type->isFile() && $this->file !== null) {
+        } elseif ($this->file !== null) {
             $data['file'] = $this->file->toArray();
-        } elseif ($this->type->isFunctionCall() && $this->functionCall !== null) {
+        } elseif ($this->functionCall !== null) {
             $data['functionCall'] = $this->functionCall->toArray();
-        } elseif ($this->type->isFunctionResponse() && $this->functionResponse !== null) {
+        } elseif ($this->functionResponse !== null) {
             $data['functionResponse'] = $this->functionResponse->toArray();
+        } else {
+            throw new RuntimeException(
+                'MessagePart requires one of: text, file, functionCall, or functionResponse. '
+                . 'This should not be a possible condition.'
+            );
         }
 
         return $data;