docutain_sdk 1.3.0

Flutter plugin of the Docutain Scanner SDK for Android and iOS. High quality document scanning, data extraction, text recognition and PDF creation for your apps.

example/lib/main.dart

import 'dart:io';

import 'package:docutain_sdk/docutain_sdk_document_datareader.dart';
import 'package:docutain_sdk/docutain_sdk_logger.dart';
import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:path_provider/path_provider.dart';
import 'package:docutain_sdk/docutain_sdk.dart';
import 'package:docutain_sdk/docutain_sdk_ui.dart';
import 'package:docutain_sdk/docutain_sdk_document.dart';
import 'package:tuple/tuple.dart';
import 'package:open_file_plus/open_file_plus.dart';
import 'package:url_launcher/url_launcher.dart';

void main() {
  runApp(const MaterialApp(home: MyApp()));
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  bool _isDocutainPluginInitialized = false;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    initDocutainSdk();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('DocutainSDK'),
      ),
      body: Container(
          alignment: Alignment.center,
          padding: const EdgeInsets.all(16),
          child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                ElevatedButton(
                    onPressed: () async {
                      var traceFile = await DocutainSdkLogger.getTraceFile();
                      OpenFile.open(traceFile?.path);
                    },
                    child: const Text('GET TRACE FILE')),
                ElevatedButton(
                    onPressed: () async {
                      //do not access sdk methods if it is not yet successfully initialized
                      if (!_isDocutainPluginInitialized) {
                        _showSnackbar(
                            "Docutain SDK not initialized. Reason:\n${await DocutainSdk.getLastError()}");
                        return;
                      }

                      var scanConfig = DocumentScannerConfiguration();
                      
                      //instead of using the device's camera to scan documents (default), you can also run the
                      //Document Scanner on imported images, for example images picked by the user from the photo gallery
                      //scanConfig.source = Source.galleryMultiple;

                      //color theming
                      /*scanConfig.colorConfig.colorPrimary =
                          const Tuple2<Color, Color>(
                              Colors.purple, Colors.purple);
                      scanConfig.colorConfig.colorSecondary =
                          const Tuple2<Color, Color>(
                              Colors.purple, Colors.purple);
                      scanConfig.colorConfig.colorOnSecondary =
                          const Tuple2<Color, Color>(
                              Colors.white, Colors.black);
                      scanConfig.colorConfig.colorScanButtonsLayoutBackground =
                          const Tuple2<Color, Color>(
                              Colors.white, Colors.black);
                      scanConfig.colorConfig.colorScanButtonsForeground =
                          const Tuple2<Color, Color>(
                              Colors.black, Colors.white);
                      scanConfig.colorConfig.colorScanPolygon =
                          const Tuple2<Color, Color>(
                              Colors.purple, Colors.purple);
                      scanConfig.colorConfig.colorBottomBarBackground =
                          const Tuple2<Color, Color>(
                              Colors.purple, Colors.black);
                      scanConfig.colorConfig.colorBottomBarForeground =
                          const Tuple2<Color, Color>(
                              Colors.white, Colors.white);
                      scanConfig.colorConfig.colorTopBarBackground =
                          const Tuple2<Color, Color>(
                              Colors.purple, Colors.black);
                      scanConfig.colorConfig.colorTopBarForeground =
                          const Tuple2<Color, Color>(
                              Colors.white, Colors.white);*/

                      //optionally enable/disable editing possibilities depending on your needs
                      //check out https://docs.docutain.com/docs/Flutter/docScan for a complete list 
                      //of currently supported configuration values

                      //scanConfig.allowCaptureModeSetting = true;
                      //scanConfig.pageEditConfig.allowPageFilter = false;
                      //scanConfig.pageEditConfig.allowPageRotation = false;
                      //scanConfig.autoCapture = false;
                      //scanConfig.defaultScanFilter = ScanFilter.auto;
                      //...

                      // scanConfig.allowPageEditing  = false;
                      //start the document scanner and wait for the result
                      //true if user finished the scan process successfully, false if user canceled
                  
                      bool rcScan =
                          await DocutainSdkUi.scanDocument(scanConfig);
                      if (!rcScan) {
                        _showSnackbar("User canceled scan process.");
                        return;
                      }

                      //You can also import files into the backend (no UI) and run OCR text recognition,
                      //data analysis and PDF creation on it

                      /*
                      FilePickerResult? result = await FilePicker.platform
                          .pickFiles(
                              type: FileType.custom,
                              allowedExtensions: ['jpg', 'pdf']);
                      if (result == null) {
                        //user canceled the file picker
                        return;
                      }

                      try {
                        bool rcImport =
                            await DocutainSdkDocumentDataReader.loadFile(
                                result.files.single.path!,
                                password: "Password1+");
                        if (!rcImport) {
                          //an error occured
                          var error = await DocutainSdk.getLastError();
                          return;
                        }
                      } on PlatformException catch (exception) {
                        if (exception.code == "SecurityException") {
                          //file is encrypted and password was wrong or empty
                          return;
                        }
                      }
                      */

                      //get the page count of the currently scanned document
                      final pageCount = await DocutainSdkDocument.pageCount();

                      //get the detected text of the currently scanned document, if any available
                      final text =
                          await DocutainSdkDocumentDataReader.getText();

                      //get the detected data of the currently scanned document, if any available
                      final data =
                          await DocutainSdkDocumentDataReader.analyze();

                      //get the application documents directory where we want to save the pdf or image file
                      final directory =
                          await getApplicationDocumentsDirectory();

                      //you can export the scanned pages as local JPG files

                      /*
                      for (var i = 1; i <= pageCount; i++) {
                        var fileReturn = await DocutainSdkDocument.writeImage(
                            i, directory.path, "Image$i.jpg");
                      }
                      */

                      //You can also get the scanned pages as JPG Uint8List
                      //which you can use for further processing, for example wrapping it in ByteData

                      /*
                      for (var i = 1; i <= pageCount; i++) {
                        var bytes = await DocutainSdkDocument.getImageBytes(i,
                            pageSourceType: PageSourceType.cutFilter);
                      }
                      */

                      //generate the pdf from the scanned document
                      //returns the file if pdf was successfully generated, returns null if pdf creation failed
                      File? pdfFile = await DocutainSdkDocument.writePDF(
                          directory.path, "testPDF");

                      if (pdfFile != null) {
                        //open the generated pdf file for demonstration purposes
                        OpenFile.open(pdfFile.path);
                      } else {
                        //pdf creation failed, get the last error
                        _showSnackbar(
                            "PDF creation failed. Reason:\n${await DocutainSdk.getLastError()}");
                      }
                    },
                    child: const Text('START SCAN'))
              ])),
    );
  }

  void initDocutainSdk() async {
    //initialize the sdk with your key
    const licenseKey = "YOUR_LICENSE_KEY_HERE";
    bool isDocutainPluginInitialized = await DocutainSdk.initSDK(licenseKey);
    if (!isDocutainPluginInitialized) {
      if (licenseKey == "YOUR_LICENSE_KEY_HERE") {
        _showLicenseEmptyDialog();
      } else{
        _showLicenseErrorDialog(licenseKey);
      }
      //get the last error message
      String error = await DocutainSdk.getLastError();
      //implement handling to avoid accessing Docutain SDK when it is not initialized
    }


    //Reading payment state and BIC when getting the analyzed data is disabled by default
    //If you want to analyze these 2 fields as well, you need to set the AnalyzeConfig accordingly
    //A good place to do this, is right after initializing the Docutain SDK
    var analyzeConfig = AnalyzeConfiguration();
    analyzeConfig.readBIC = true;
    analyzeConfig.readPaymentState = true;
    if (!await DocutainSdkDocumentDataReader.setAnalyzeConfiguration(
        analyzeConfig)) {
      //get the last error message
      String error = await DocutainSdk.getLastError();
    }

    //set the log level depending on your needs
    await DocutainSdkLogger.setLogLevel(Level.verbose);

    if (!mounted) return;

    setState(() {
      _isDocutainPluginInitialized = isDocutainPluginInitialized;
    });
  }

  void _showSnackbar(String message) {
    SnackBar snackBar = SnackBar(
      content: Text(message),
    );

    ScaffoldMessenger.of(context).showSnackBar(snackBar);
  }

  Future<void> _showLicenseEmptyDialog() async {
    return showDialog<void>(
      context: context,
      barrierDismissible: false, // user must tap button!
      builder: (BuildContext context) {
        return AlertDialog(
          title: const Text('License needed'),
          content: const SingleChildScrollView(
            child: ListBody(
              children: <Widget>[
                Text(
                    'You need a trial license in order to run this example. You can generate a trial license key on our website for free.'),
              ],
            ),
          ),
          actions: <Widget>[
            TextButton(
              child: const Text('Get trial license'),
              onPressed: () async {
                await launchUrl(Uri.parse(
                    'https://sdk.docutain.com/TrialLicense?Source=3277320'));
              },
            ),
          ],
        );
      },
    );
  }

  Future<void> _showLicenseErrorDialog(String licenseKey) async {
    return showDialog<void>(
      context: context,
      barrierDismissible: false, // user must tap button!
      builder: (BuildContext context) {
        return AlertDialog(
          title: const Text('License error'),
          content: const SingleChildScrollView(
            child: ListBody(
              children: <Widget>[
                Text(
                    'A valid license key is required. Please contact our support to get an extended trial license.'),
              ],
            ),
          ),
          actions: <Widget>[
            TextButton(
              child: const Text('Contact Support'),
              onPressed: () async {
                await launchUrl(Uri.parse(
                    'mailto:[e-mail]?subject=Trial License Error&body=Please keep your following trial license key in this e-mail: $licenseKey'));
              },
            ),
          ],
        );
      },
    );
  }
}