Update Requirements (#541)

* Update package requiremenst

* github workflow updates

* ios build updates

* Theme adjustments

* Further updates

* Fix typo

* Deprecated imperative apply of Flutter's Gradle plugins

Ref: https://docs.flutter.dev/release/breaking-changes/flutter-gradle-plugin-apply

* Refactor wedge scanner

* Add context checks

* Adjust behaviour if testing

* Further refactoring

* Moar checks

* Logic fix

* Fix for wedge scanner test

* Fix for barcode processing

* Fix

* Yet another fix

lib/barcode/barcode.dart

@@ -2,6 +2,7 @@ import "package:flutter/material.dart";
 
 import "package:flutter_speed_dial/flutter_speed_dial.dart";
 import "package:flutter_tabler_icons/flutter_tabler_icons.dart";
+import "package:inventree/helpers.dart";
 import "package:inventree/inventree/sales_order.dart";
 import "package:inventree/preferences.dart";
 import "package:inventree/widget/order/sales_order_detail.dart";
@@ -46,17 +47,20 @@ Future<void> barcodeFailure(String msg, dynamic extra) async {
       msg,
       success: false,
     onAction: () {
-        OneContext().showDialog(
-          builder: (BuildContext context) => SimpleDialog(
-            title: Text(L10().barcodeError),
-            children: <Widget>[
-              ListTile(
-                title: Text(L10().responseData),
-                subtitle: Text(extra.toString())
-              )
-            ]
-          )
-        );
+        if (hasContext()) {
+          OneContext().showDialog(
+              builder: (BuildContext context) =>
+                  SimpleDialog(
+                      title: Text(L10().barcodeError),
+                      children: <Widget>[
+                        ListTile(
+                            title: Text(L10().responseData),
+                            subtitle: Text(extra.toString())
+                        )
+                      ]
+                  )
+          );
+        }
     }
   );
 }
@@ -277,17 +281,20 @@ class BarcodeScanHandler extends BarcodeHandler {
         success: false,
         onAction: () {
 
-          OneContext().showDialog(
-              builder: (BuildContext context) => SimpleDialog(
-                title: Text(L10().unknownResponse),
-                children: <Widget>[
-                  ListTile(
-                    title: Text(L10().responseData),
-                    subtitle: Text(data.toString()),
-                  )
-                ],
-              )
-          );
+          if (hasContext()) {
+            OneContext().showDialog(
+                builder: (BuildContext context) =>
+                    SimpleDialog(
+                      title: Text(L10().unknownResponse),
+                      children: <Widget>[
+                        ListTile(
+                          title: Text(L10().responseData),
+                          subtitle: Text(data.toString()),
+                        )
+                      ],
+                    )
+            );
+          }
         }
     );
   }

lib/barcode/controller.dart

@@ -1,4 +1,5 @@
 import "package:flutter/material.dart";
+import "package:inventree/helpers.dart";
 import "package:one_context/one_context.dart";
 
 import "package:inventree/preferences.dart";
@@ -43,7 +44,7 @@ class InvenTreeBarcodeControllerState extends State<InvenTreeBarcodeController>
    * Barcode data should be passed as a string
    */
   Future<void> handleBarcodeData(String? data) async {
-    
+
     // Check that the data is valid, and this view is still mounted
     if (!mounted || data == null || data.isEmpty) {
       return;
@@ -58,7 +59,11 @@ class InvenTreeBarcodeControllerState extends State<InvenTreeBarcodeController>
       processingBarcode = true;
     });
 
-    BuildContext? context = OneContext.hasContext ? OneContext().context : null;
+    BuildContext? context;
+
+    if (hasContext()) {
+      context = OneContext.hasContext ? OneContext().context : null;
+    }
 
     showLoadingOverlay(context);
     await pauseScan();

lib/barcode/flutter_barcode_listener.dart

@@ -1,175 +0,0 @@
-
-/*
- * Custom keyboard listener which allows the app to act as a keyboard "wedge",
- * and intercept barcodes from any compatible scanner.
- *
- * Note: This code was copied from https://github.com/fuadreza/flutter_barcode_listener/blob/master/lib/flutter_barcode_listener.dart
- *
- * If that code becomes available on pub.dev, we can remove this file and reference that library
- */
-
-import "dart:async";
-
-import "package:flutter/material.dart";
-import "package:flutter/services.dart";
-
-typedef BarcodeScannedCallback = void Function(String barcode);
-
-/// This widget will listen for raw PHYSICAL keyboard events
-/// even when other controls have primary focus.
-/// It will buffer all characters coming in specifed `bufferDuration` time frame
-/// that end with line feed character and call callback function with result.
-/// Keep in mind this widget will listen for events even when not visible.
-/// Windows seems to be using the [RawKeyDownEvent] instead of the
-/// [RawKeyUpEvent], this behaviour can be managed by setting [useKeyDownEvent].
-class BarcodeKeyboardListener extends StatefulWidget {
-
-  /// This widget will listen for raw PHYSICAL keyboard events
-  /// even when other controls have primary focus.
-  /// It will buffer all characters coming in specifed `bufferDuration` time frame
-  /// that end with line feed character and call callback function with result.
-  /// Keep in mind this widget will listen for events even when not visible.
-  const BarcodeKeyboardListener(
-      {Key? key,
-
-        /// Child widget to be displayed.
-        required this.child,
-
-        /// Callback to be called when barcode is scanned.
-        required Function(String) onBarcodeScanned,
-
-        /// When experiencing issueswith empty barcodes on Windows,
-        /// set this value to true. Default value is `false`.
-        this.useKeyDownEvent = false,
-
-        /// Maximum time between two key events.
-        /// If time between two key events is longer than this value
-        /// previous keys will be ignored.
-        Duration bufferDuration = hundredMs})
-      : _onBarcodeScanned = onBarcodeScanned,
-        _bufferDuration = bufferDuration,
-        super(key: key);
-
-  final Widget child;
-  final BarcodeScannedCallback _onBarcodeScanned;
-  final Duration _bufferDuration;
-  final bool useKeyDownEvent;
-
-  @override
-  _BarcodeKeyboardListenerState createState() => _BarcodeKeyboardListenerState(
-      _onBarcodeScanned, _bufferDuration, useKeyDownEvent);
-}
-
-const Duration aSecond = Duration(seconds: 1);
-const Duration hundredMs = Duration(milliseconds: 100);
-const String lineFeed = "\n";
-
-class _BarcodeKeyboardListenerState extends State<BarcodeKeyboardListener> {
-
-  _BarcodeKeyboardListenerState(this._onBarcodeScannedCallback,
-      this._bufferDuration, this._useKeyDownEvent) {
-    RawKeyboard.instance.addListener(_keyBoardCallback);
-    _keyboardSubscription =
-        _controller.stream.where((char) => char != null).listen(onKeyEvent);
-  }
-
-  List<String> _scannedChars = [];
-  DateTime? _lastScannedCharCodeTime;
-  late StreamSubscription<String?> _keyboardSubscription;
-
-  final BarcodeScannedCallback _onBarcodeScannedCallback;
-  final Duration _bufferDuration;
-
-  final _controller = StreamController<String?>();
-
-  final bool _useKeyDownEvent;
-
-  bool _isShiftPressed = false;
-  void onKeyEvent(String? char) {
-    //remove any pending characters older than bufferDuration value
-    checkPendingCharCodesToClear();
-    _lastScannedCharCodeTime = DateTime.now();
-    if (char == lineFeed) {
-      _onBarcodeScannedCallback.call(_scannedChars.join());
-      resetScannedCharCodes();
-    } else {
-      //add character to list of scanned characters;
-      _scannedChars.add(char!);
-    }
-  }
-
-  void checkPendingCharCodesToClear() {
-    if (_lastScannedCharCodeTime != null) {
-      if (_lastScannedCharCodeTime!
-          .isBefore(DateTime.now().subtract(_bufferDuration))) {
-        resetScannedCharCodes();
-      }
-    }
-  }
-
-  void resetScannedCharCodes() {
-    _lastScannedCharCodeTime = null;
-    _scannedChars = [];
-  }
-
-  void addScannedCharCode(String charCode) {
-    _scannedChars.add(charCode);
-  }
-
-  void _keyBoardCallback(RawKeyEvent keyEvent) {
-    if (keyEvent.logicalKey.keyId > 255 &&
-        keyEvent.data.logicalKey != LogicalKeyboardKey.enter &&
-        keyEvent.data.logicalKey != LogicalKeyboardKey.shiftLeft) return;
-    if ((!_useKeyDownEvent && keyEvent is RawKeyUpEvent) ||
-        (_useKeyDownEvent && keyEvent is RawKeyDownEvent)) {
-      if (keyEvent.data is RawKeyEventDataAndroid) {
-        if (keyEvent.data.logicalKey == LogicalKeyboardKey.shiftLeft) {
-          _isShiftPressed = true;
-        } else {
-          if (_isShiftPressed) {
-            _isShiftPressed = false;
-            _controller.sink.add(String.fromCharCode(
-                ((keyEvent.data) as RawKeyEventDataAndroid).codePoint).toUpperCase());
-          } else {
-            _controller.sink.add(String.fromCharCode(
-                ((keyEvent.data) as RawKeyEventDataAndroid).codePoint));
-          }
-        }
-      } else if (keyEvent.data is RawKeyEventDataFuchsia) {
-        _controller.sink.add(String.fromCharCode(
-            ((keyEvent.data) as RawKeyEventDataFuchsia).codePoint));
-      } else if (keyEvent.data.logicalKey == LogicalKeyboardKey.enter) {
-        _controller.sink.add(lineFeed);
-      } else if (keyEvent.data is RawKeyEventDataWeb) {
-        _controller.sink.add(((keyEvent.data) as RawKeyEventDataWeb).keyLabel);
-      } else if (keyEvent.data is RawKeyEventDataLinux) {
-        _controller.sink
-            .add(((keyEvent.data) as RawKeyEventDataLinux).keyLabel);
-      } else if (keyEvent.data is RawKeyEventDataWindows) {
-        _controller.sink.add(String.fromCharCode(
-            ((keyEvent.data) as RawKeyEventDataWindows).keyCode));
-      } else if (keyEvent.data is RawKeyEventDataMacOs) {
-        _controller.sink
-            .add(((keyEvent.data) as RawKeyEventDataMacOs).characters);
-      } else if (keyEvent.data is RawKeyEventDataIos) {
-        _controller.sink
-            .add(((keyEvent.data) as RawKeyEventDataIos).characters);
-      } else {
-        _controller.sink.add(keyEvent.character);
-      }
-    }
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return widget.child;
-  }
-
-  @override
-  void dispose() {
-    _keyboardSubscription.cancel();
-    _controller.close();
-    RawKeyboard.instance.removeListener(_keyBoardCallback);
-    super.dispose();
-  }
-}

lib/barcode/stock.dart

@@ -42,7 +42,7 @@ class BarcodeScanStockLocationHandler extends BarcodeHandler {
 
         final bool result = await onLocationScanned(_loc);
 
-        if (result && OneContext.hasContext) {
+        if (result && hasContext()) {
           OneContext().pop();
         }
         return;

lib/barcode/wedge_controller.dart

@@ -1,11 +1,12 @@
 
 import "package:flutter/material.dart";
+import "package:flutter/services.dart";
 import "package:flutter_tabler_icons/flutter_tabler_icons.dart";
 
 import "package:inventree/app_colors.dart";
 import "package:inventree/barcode/controller.dart";
 import "package:inventree/barcode/handler.dart";
-import "package:inventree/barcode/flutter_barcode_listener.dart";
+
 import "package:inventree/l10.dart";
 import "package:inventree/helpers.dart";
 
@@ -31,6 +32,12 @@ class _WedgeBarcodeControllerState extends InvenTreeBarcodeControllerState {
 
   bool get scanning => mounted && canScan;
 
+  final FocusNode _focusNode = FocusNode();
+
+  List<String> _scannedCharacters = [];
+
+  DateTime? _lastScanTime;
+
   @override
   Future<void> pauseScan() async {
 
@@ -51,6 +58,45 @@ class _WedgeBarcodeControllerState extends InvenTreeBarcodeControllerState {
     }
   }
 
+  // Callback for a single key press / scan
+  void handleKeyEvent(KeyEvent event) {
+
+    if (!scanning) {
+      return;
+    }
+
+    // Look only for key-down events
+    if (event is! KeyDownEvent) {
+      return;
+    }
+
+    // Ignore events without a character code
+    if (event.character == null) {
+      return;
+    }
+
+    DateTime now = DateTime.now();
+
+    // Throw away old characters
+    if (_lastScanTime == null || _lastScanTime!.isBefore(now.subtract(Duration(milliseconds: 250)))) {
+      _scannedCharacters.clear();
+    }
+
+    _lastScanTime = now;
+
+    if (event.character == "\n") {
+      if (_scannedCharacters.isNotEmpty) {
+        // Debug output required for unit testing
+        debug("scanned: ${_scannedCharacters.join()}");
+        handleBarcodeData(_scannedCharacters.join());
+      }
+
+      _scannedCharacters.clear();
+    } else {
+      _scannedCharacters.add(event.character!);
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
 
@@ -66,8 +112,9 @@ class _WedgeBarcodeControllerState extends InvenTreeBarcodeControllerState {
             Spacer(flex: 5),
             Icon(TablerIcons.barcode, size: 64),
             Spacer(flex: 5),
-            BarcodeKeyboardListener(
-              useKeyDownEvent: true,
+            KeyboardListener(
+              autofocus: true,
+              focusNode: _focusNode,
               child: SizedBox(
                 child: CircularProgressIndicator(
                   color: scanning ? COLOR_ACTION : COLOR_PROGRESS
@@ -75,13 +122,16 @@ class _WedgeBarcodeControllerState extends InvenTreeBarcodeControllerState {
                 width: 64,
                 height: 64,
               ),
-              onBarcodeScanned: (String barcode) {
-                debug("scanned: ${barcode}");
-                if (scanning) {
-                  // Process the barcode data
-                  handleBarcodeData(barcode);
-                }
+              onKeyEvent: (event) {
+                handleKeyEvent(event);
               },
+              // onBarcodeScanned: (String barcode) {
+              //   debug("scanned: ${barcode}");
+              //   if (scanning) {
+              //     // Process the barcode data
+              //     handleBarcodeData(barcode);
+              //   }
+              // },
             ),
             Spacer(flex: 5),
             Padding(