Display generated PDF on expense screen

moneymgr_mobile/lib/routes/scan/scan_screen.dart

@@ -1,8 +1,14 @@
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:alert_dialog/alert_dialog.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:flutter_pdfview/flutter_pdfview.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:logging/logging.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:scanbot_sdk/scanbot_sdk.dart';
 import 'package:scanbot_sdk/scanbot_sdk_ui_v2.dart';
 
 import '../../services/storage/expenses.dart';
@@ -10,7 +16,8 @@ import '../../services/storage/expenses.dart';
 part 'scan_screen.g.dart';
 
 @riverpod
-Future<String?> _scanDocument(Ref ref) async {
+Future<Uint8List?> _scanDocument(Ref ref) async {
+  DocumentDataExtractionResult d;
   var configuration = DocumentScanningFlow(
     appearance: DocumentFlowAppearanceConfiguration(
       statusBarMode: StatusBarMode.DARK,
@@ -23,7 +30,19 @@ Future<String?> _scanDocument(Ref ref) async {
   );
   var documentResult = await ScanbotSdkUiV2.startDocumentScanner(configuration);
 
-  return documentResult.data?.pdfURI;
+  if (documentResult.status != OperationStatus.OK) {
+    throw Exception("Scanner failed with status ${documentResult.status}");
+  }
+
+  // Convert result to PDF
+  var result = await ScanbotSdk.document.createPDFForDocument(
+    PDFFromDocumentParams(
+      documentID: documentResult.data!.uuid,
+      pdfConfiguration: PdfConfiguration(),
+    ),
+  );
+  final pdfPath = result.pdfFileUri.replaceFirst("file://", "");
+  return File(pdfPath).readAsBytes();
 }
 
 class ScanScreen extends HookConsumerWidget {
@@ -43,7 +62,7 @@ class ScanScreen extends HookConsumerWidget {
     // Perform a switch-case on the result to handle loading/error states
     return switch (boredSuggestion) {
       AsyncData(:final value) when value != null => ExpenseEditor(
-        filePath: value,
+        file: value,
         onFinished: (e) {},
       ),
 
@@ -97,18 +116,31 @@ class ScanErrorScreen extends StatelessWidget {
 }
 
 class ExpenseEditor extends HookWidget {
-  final String filePath;
+  final Uint8List file;
   final Function(Expense) onFinished;
 
   const ExpenseEditor({
     super.key,
-    required this.filePath,
+    required this.file,
     required this.onFinished,
   });
 
   @override
   Widget build(BuildContext context) {
-    // TODO: implement build
-    throw UnimplementedError();
+    return ListView(
+      children: [
+        SizedBox(
+          height: 200,
+          child: PDFView(
+            pdfData: file,
+            onError: (e) {
+              Logger.root.warning("Failed to render PDF $e");
+              alert(context, content: Text("Failed to render PDF $e"));
+            },
+            fitPolicy: FitPolicy.BOTH,
+          ),
+        ),
+      ],
+    );
   }
 }