fix(ocr): ocr, switch tessdata_best with fast

README.md

@@ -20,4 +20,4 @@ Expense manager
         along with this program.  If not, see <https://www.gnu.org/licenses/>.
 ```
 
-The base app includes the [tessdata_best](https://github.com/tesseract-ocr/tessdata_best) English trained data, ©️ [tessdata_best / Tesseract contributors](https://github.com/tesseract-ocr/tessdata_best/graphs/contributors), used under the [Apache 2.0 license](https://github.com/tesseract-ocr/tessdata_best/blob/main/LICENSE)
+The base app includes the [tessdata_fast](https://github.com/tesseract-ocr/tessdata_fast) English trained data, ©️ [tessdata_fast / Tesseract contributors](https://github.com/tesseract-ocr/tessdata_fast/graphs/contributors), used under the [Apache 2.0 license](https://github.com/tesseract-ocr/tessdata_fast/blob/main/LICENSE)

android/app/src/main/AndroidManifest.xml

@@ -1,4 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:label="Prašule"
         android:name="${applicationName}"

lib/network/tessdata.dart

@@ -12,7 +12,7 @@ class TessdataApi {
   );
   static Future<List<String>> getAvailableData() async {
     var res = await _client.get(
-        "https://git.mnau.xyz/api/v1/repos/hernik/tessdata_best/contents",
+        "https://git.mnau.xyz/api/v1/repos/hernik/tessdata_fast/contents",
         options: Options(headers: {"Accept": "application/json"}));
     if ((res.statusCode ?? 500) > 399) {
       return Future.error("The server returned status code ${res.statusCode}");
@@ -28,25 +28,36 @@ class TessdataApi {
 
   static Future<void> deleteData(String name) async {
     var dataDir = Directory(await FlutterTesseractOcr.getTessdataPath());
+    if (!dataDir.existsSync()) {
+      dataDir.createSync();
+    }
     var dataFile = File("${dataDir.path}/$name.traineddata");
     if (!dataFile.existsSync()) return;
     dataFile.deleteSync();
   }
 
-  static Future<List<String>> getDownloadedData() async =>
+  static Future<List<String>> getDownloadedData() async {
-      Directory(await FlutterTesseractOcr.getTessdataPath())
+    var tessDir = Directory(await FlutterTesseractOcr.getTessdataPath());
+    if (!tessDir.existsSync()) {
+      tessDir.createSync();
+    }
+    return tessDir
         .listSync()
         .where((element) => element.path.endsWith(".traineddata"))
         .map<String>((e) => e.path.split("/").last)
         .toList();
+  }
 
   static Future<void> downloadData(String isoCode,
       {void Function(int, int)? callback}) async {
-    var file = File(
+    var tessDir = Directory(await FlutterTesseractOcr.getTessdataPath());
-        "${(await FlutterTesseractOcr.getTessdataPath())}/$isoCode.traineddata");
+    if (!tessDir.existsSync()) {
+      tessDir.createSync();
+    }
+    var file = File("${tessDir.path}/$isoCode.traineddata");
     if (file.existsSync()) return; // TODO: maybe ask to redownload?
     var res = await _client.get(
-        "https://git.mnau.xyz/hernik/tessdata_best/raw/branch/main/$isoCode.traineddata",
+        "https://git.mnau.xyz/hernik/tessdata_fast/raw/branch/main/$isoCode.traineddata",
         options: Options(responseType: ResponseType.bytes),
         onReceiveProgress: callback);
     if ((res.statusCode ?? 500) > 399) {

lib/views/home.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_slidable/flutter_slidable.dart';
 import 'package:flutter_speed_dial/flutter_speed_dial.dart';
+import 'package:flutter_tesseract_ocr/flutter_tesseract_ocr.dart';
 import 'package:grouped_list/grouped_list.dart';
 import 'package:image_picker/image_picker.dart';
 import 'package:intl/date_symbol_data_local.dart';
@@ -14,6 +15,7 @@ import 'package:prasule/pw/platformbutton.dart';
 import 'package:prasule/pw/platformdialog.dart';
 import 'package:prasule/views/create_entry.dart';
 import 'package:prasule/views/settings/settings.dart';
+import 'package:prasule/views/settings/tessdata_list.dart';
 import 'package:prasule/views/setup.dart';
 
 class HomeView extends StatefulWidget {
@@ -85,48 +87,8 @@ class _HomeViewState extends State<HomeView> {
           SpeedDialChild(
             child: const Icon(Icons.image),
             label: "Add through saved image",
-            onTap: () async {
+            onTap: () {
-              var availableLanguages = await TessdataApi.getDownloadedData();
+              startOcr(ImageSource.gallery);
-              if (mounted) {
-                var selectedLanguages =
-                    List<bool>.filled(availableLanguages.length, false);
-                selectedLanguages[
-                    availableLanguages.indexOf("eng.traineddata")] = true;
-                showDialog(
-                  context: context,
-                  builder: (c) => PlatformDialog(
-                    title: "Select languages for OCR",
-                    content: Column(
-                      children: [
-                        ...List.generate(
-                          availableLanguages.length,
-                          (index) => Row(
-                            children: [
-                              Checkbox(
-                                value: selectedLanguages[index],
-                                onChanged: (value) {
-                                  if (value == null ||
-                                      (selectedLanguages
-                                                  .where((element) => element)
-                                                  .length <=
-                                              1 &&
-                                          !value)) return;
-                                  selectedLanguages[index] = value;
-                                  setState(() {}); // todo: builder
-                                },
-                              ),
-                              const SizedBox(
-                                width: 10,
-                              ),
-                              Text(availableLanguages[index].split(".").first)
-                            ],
-                          ),
-                        )
-                      ],
-                    ),
-                  ),
-                );
-              }
             },
           ),
         ],
@@ -286,6 +248,102 @@ class _HomeViewState extends State<HomeView> {
     );
   }
 
+  Future<void> startOcr(ImageSource imgSrc) async {
+    var availableLanguages = await TessdataApi.getDownloadedData();
+    if (availableLanguages.isEmpty) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content:
+              const Text("You do not have any OCR language data downloaded"),
+          action: SnackBarAction(
+            label: "Download",
+            onPressed: () {
+              Navigator.of(context).push(
+                MaterialPageRoute(
+                  builder: (c) => const TessdataListView(),
+                ),
+              );
+            },
+          ),
+        ),
+      );
+      return;
+    }
+    if (!mounted) return;
+    var selectedLanguages = List<bool>.filled(availableLanguages.length, false);
+    if (selectedLanguages.length == 1) {
+      selectedLanguages[0] = true;
+    }
+    showDialog(
+      context: context,
+      builder: (c) => PlatformDialog(
+        actions: [
+          TextButton(
+              onPressed: () async {
+                final ImagePicker picker = ImagePicker();
+                final XFile? media = await picker.pickImage(source: imgSrc);
+                if (media == null) {
+                  if (mounted) Navigator.of(context).pop();
+                  return;
+                }
+                // get selected languages
+                var selected = availableLanguages
+                    .where((element) =>
+                        selectedLanguages[availableLanguages.indexOf(element)])
+                    .join("+")
+                    .replaceAll(".traineddata", "");
+                logger.i(selected);
+                var string = await FlutterTesseractOcr.extractText(media.path,
+                    language: selected,
+                    args: {
+                      //"psm": "4",
+                      "preserve_interword_spaces": "1",
+                    });
+                logger.i(string);
+                if (mounted) Navigator.of(context).pop();
+                return;
+              },
+              child: const Text("Ok")),
+          TextButton(
+              onPressed: () {
+                Navigator.of(c).pop();
+              },
+              child: const Text("Cancel")),
+        ],
+        title: "Select languages for OCR",
+        content: Column(
+          children: [
+            ...List.generate(
+              availableLanguages.length,
+              (index) => Row(
+                children: [
+                  Checkbox(
+                    value: selectedLanguages[index],
+                    onChanged: (value) {
+                      if (value == null ||
+                          (selectedLanguages
+                                      .where((element) => element)
+                                      .length <=
+                                  1 &&
+                              !value)) return;
+                      selectedLanguages[index] = value;
+                      setState(() {}); // todo: builder
+                    },
+                  ),
+                  const SizedBox(
+                    width: 10,
+                  ),
+                  Text(availableLanguages[index].split(".").first)
+                ],
+              ),
+            )
+          ],
+        ),
+      ),
+    );
+  }
+
   Future<void> getLostData() async {
     final ImagePicker picker = ImagePicker();
     final LostDataResponse response = await picker.retrieveLostData();

lib/views/settings/tessdata_list.dart

@@ -133,6 +133,7 @@ class _TessdataListViewState extends State<TessdataListView> {
   /// Used to find which `.traineddata` is already downloaded and which not
   /// so we can show it to the user
   void loadAllTessdata() async {
+    var tessDir = Directory(await FlutterTesseractOcr.getTessdataPath());
     var d = await TessdataApi.getAvailableData();
     var dataStatus = <Map<String, bool>>[];
     for (var data in d) {
@@ -140,8 +141,7 @@ class _TessdataListViewState extends State<TessdataListView> {
       e[data] = false;
       dataStatus.add(e);
     }
-    var appDir =
+    var appDir = tessDir.listSync();
-        Directory(await FlutterTesseractOcr.getTessdataPath()).listSync();
     for (var file in appDir) {
       if (file is! File ||
           !file.path.endsWith("traineddata") ||