BREAKING CHANGE(vercel-ai-sdk): migrate to Vercel AI SDK v6 and introduce provider registry (getModel) returning LanguageModelV3

ts_document/index.ts

@@ -0,0 +1,61 @@
+import * as plugins from './plugins.js';
+import type { LanguageModelV3 } from '@ai-sdk/provider';
+import type { ModelMessage } from 'ai';
+
+let smartpdfInstance: InstanceType<typeof plugins.smartpdf.SmartPdf> | null = null;
+
+async function ensureSmartpdf(): Promise<InstanceType<typeof plugins.smartpdf.SmartPdf>> {
+  if (!smartpdfInstance) {
+    smartpdfInstance = new plugins.smartpdf.SmartPdf();
+    await smartpdfInstance.start();
+  }
+  return smartpdfInstance;
+}
+
+export interface IDocumentOptions {
+  model: LanguageModelV3;
+  systemMessage?: string;
+  userMessage: string;
+  pdfDocuments: Uint8Array[];
+  messageHistory?: ModelMessage[];
+}
+
+export async function analyzeDocuments(options: IDocumentOptions): Promise<string> {
+  const pdf = await ensureSmartpdf();
+
+  const imagePages: Uint8Array[] = [];
+  for (const doc of options.pdfDocuments) {
+    const pages = await pdf.convertPDFToPngBytes(doc);
+    imagePages.push(...pages);
+  }
+
+  // Filter out empty buffers
+  const validPages = imagePages.filter(page => page && page.length > 0);
+
+  const result = await plugins.generateText({
+    model: options.model,
+    system: options.systemMessage,
+    messages: [
+      ...(options.messageHistory ?? []),
+      {
+        role: 'user',
+        content: [
+          { type: 'text', text: options.userMessage },
+          ...validPages.map(page => ({
+            type: 'image' as const,
+            image: page,
+            mimeType: 'image/png' as const,
+          })),
+        ],
+      },
+    ],
+  });
+  return result.text;
+}
+
+export async function stopSmartpdf(): Promise<void> {
+  if (smartpdfInstance) {
+    await smartpdfInstance.stop();
+    smartpdfInstance = null;
+  }
+}