fix(core): improve SmartPdf lifecycle management and update dependencies

ts/provider.openai.ts

@@ -1,5 +1,6 @@
 import * as plugins from './plugins.js';
 import * as paths from './paths.js';
+import { Readable } from 'stream';
 
 // Custom type definition for chat completion messages
 export type TChatCompletionRequestMessage = { 
@@ -20,7 +21,6 @@ export interface IOpenaiProviderOptions {
 export class OpenAiProvider extends MultiModalModel {
   private options: IOpenaiProviderOptions;
   public openAiApiClient: plugins.openai.default;
-  public smartpdfInstance: plugins.smartpdf.SmartPdf;
 
   constructor(optionsArg: IOpenaiProviderOptions) {
     super();
@@ -28,14 +28,16 @@ export class OpenAiProvider extends MultiModalModel {
   }
 
   public async start() {
+    await super.start();
     this.openAiApiClient = new plugins.openai.default({
       apiKey: this.options.openaiToken,
       dangerouslyAllowBrowser: true,
     });
-    this.smartpdfInstance = new plugins.smartpdf.SmartPdf();
   }
 
-  public async stop() {}
+  public async stop() {
+    await super.stop();
+  }
 
   public async chatStream(input: ReadableStream<Uint8Array>): Promise<ReadableStream<string>> {
     // Create a TextDecoder to handle incoming chunks
@@ -148,7 +150,8 @@ export class OpenAiProvider extends MultiModalModel {
       speed: 1,
     });
     const stream = result.body;
-    done.resolve(stream);
+    const nodeStream = Readable.fromWeb(stream as any);
+    done.resolve(nodeStream);
     return done.promise;
   }
 
@@ -164,13 +167,10 @@ export class OpenAiProvider extends MultiModalModel {
     let pdfDocumentImageBytesArray: Uint8Array[] = [];
 
     // Convert each PDF into one or more image byte arrays.
-    const smartpdfInstance = new plugins.smartpdf.SmartPdf();
-    await smartpdfInstance.start();
     for (const pdfDocument of optionsArg.pdfDocuments) {
-      const documentImageArray = await smartpdfInstance.convertPDFToPngBytes(pdfDocument);
+      const documentImageArray = await this.smartpdfInstance.convertPDFToPngBytes(pdfDocument);
       pdfDocumentImageBytesArray = pdfDocumentImageBytesArray.concat(documentImageArray);
     }
-    await smartpdfInstance.stop();
 
     console.log(`image smartfile array`);
     console.log(pdfDocumentImageBytesArray.map((smartfile) => smartfile.length));