Add WASM compatibility

lib/src/calendars/islamic_yearmonthday_calculator.dart

@@ -168,9 +168,7 @@ class IslamicYearMonthDayCalculator extends RegularYearMonthDayCalculator {
       case IslamicLeapYearPattern.indian:
         return 690562340; // 0b101001001010010010010100100100
       case IslamicLeapYearPattern.habashAlHasib:
-        return 153692453; // 0b001001001010010010100100100101
-      default:
-        throw ArgumentError.value(leapYearPattern.index, 'leapYearPattern');
+        return 153692453;
     }
   }
 
@@ -182,8 +180,6 @@ class IslamicYearMonthDayCalculator extends RegularYearMonthDayCalculator {
         return _daysAtAstronomicalEpoch;
       case IslamicEpoch.civil:
         return _daysAtCivilEpoch;
-      default:
-        throw ArgumentError.value(epoch.index, 'epoch');
     }
   }
 }

lib/src/calendars/week_year_rules.dart

@@ -79,8 +79,6 @@ abstract class WeekYearRules {
       case CalendarWeekRule.firstFullWeek:
         minDaysInFirstWeek = 7;
         break;
-      default:
-        throw ArgumentError('Unsupported CalendarWeekRule: $calendarWeekRule');
     }
     return SimpleWeekYearRule(minDaysInFirstWeek, firstDayOfWeek, true);
   }

lib/src/platforms/vm.dart

@@ -4,7 +4,7 @@
 
 import 'dart:async';
 import 'dart:collection';
-import 'dart:io' as io;
+import 'package:universal_io/io.dart' as io;
 
 import 'package:time_machine2/src/time_machine_internal.dart';
 import 'package:time_machine2/src/timezones/datetimezone_providers.dart';

lib/src/platforms/web.dart

@@ -3,7 +3,7 @@
 // Use of this source code is governed by the Apache License 2.0, as found in the LICENSE.txt file.
 
 import 'dart:async';
-import 'dart:js';
+import 'dart:js_interop';
 
 import 'package:time_machine2/src/time_machine_internal.dart';
 import 'package:time_machine2/src/timezones/datetimezone_providers.dart';
@@ -53,19 +53,34 @@ class TimeMachine {
   // {locale: en-US, numberingSystem: latn, calendar: gregory, timeZone: America/New_York, year: numeric, month: numeric, day: numeric}
   static void _readIntlObject() {
     try {
-      JsObject options = context['Intl']
-          .callMethod('DateTimeFormat')
-          .callMethod('resolvedOptions');
+      final dateTimeFormat = _DateTimeFormat();
+      final options = dateTimeFormat.resolvedOptions();
 
-      _locale = options['locale'];
-      _timeZoneId = options['timeZone'];
-      _numberingSystem = options['numberingSystem'];
-      _calendar = options['calendar'];
-      _yearFormat = options['year'];
-      _monthFormat = options['month'];
-      _dayFormat = options['day'];
+      _locale = options.locale.toDart;
+      _timeZoneId = options.timeZone.toDart;
+      _numberingSystem = options.numberingSystem.toDart;
+      _calendar = options.calendar.toDart;
+      _yearFormat = options.year.toDart;
+      _monthFormat = options.month.toDart;
+      _dayFormat = options.day.toDart;
     } catch (e, s) {
       print('Failed to get platform local information.\n$e\n$s');
     }
   }
 }
+
+@JS('Intl.DateTimeFormat')
+extension type _DateTimeFormat._(JSObject _) implements JSObject {
+  external _DateTimeFormat();
+  external _ResolvedOptions resolvedOptions();
+}
+
+extension type _ResolvedOptions._(JSObject _) implements JSObject {
+  external JSString get locale;
+  external JSString get timeZone;
+  external JSString get numberingSystem;
+  external JSString get calendar;
+  external JSString get year;
+  external JSString get month;
+  external JSString get day;
+}

lib/src/text/parse_result.dart

@@ -42,7 +42,7 @@ class ParseResult<T> {
       throw StateError(
           'Parse operation succeeded, so no exception is available');
     }
-    return _errorProvider!();
+    return _errorProvider();
   }
 
   /// Gets the value from the parse operation if it was successful, or throws an exception indicating the parse failure
@@ -56,7 +56,7 @@ class ParseResult<T> {
     if (_errorProvider == null) {
       return _value;
     }
-    throw _errorProvider!();
+    throw _errorProvider();
   }
 
   /// Returns the success value, and sets the out parameter to either

lib/src/text/zoneddatetime_pattern_parser.dart

@@ -279,7 +279,7 @@ class _ZonedDateTimeParseBucket extends ParseBucket<ZonedDateTime> {
           }
         }
         value.move(value.index + longestSoFar.length);
-        return _zoneProvider!
+        return _zoneProvider
             .getDateTimeZoneSync(longestSoFar); // [longestSoFar];
       }
     }

lib/src/timezones/idatetimezone_writer.dart

@@ -2,7 +2,7 @@
 /// Use of this source code is governed by the Apache License 2.0,
 /// as found in the LICENSE.txt file.
 
-import 'dart:io';
+import 'package:universal_io/io.dart';
 
 import 'package:time_machine2/time_machine2.dart';
 

lib/src/timezones/tzdb_stream_reader.dart

@@ -192,8 +192,6 @@ class TzdbStreamReader {
         return FixedDateTimeZone.read(reader, id);
       case DateTimeZoneType.precalculated:
         return PrecalculatedDateTimeZone.read(reader, id);
-      default:
-        throw Exception('Unknown zone type: $type');
     }
   }
 }

lib/time_machine2.dart

@@ -9,6 +9,7 @@ import 'src/platforms/platform_io.dart'
     // `dart.library.js` is compatible with node and browser via dart2js -- `dart.library.html` will only work for the browser
     // or at lest it seemed it should be, when I tried `dart.library.js` in chrome, it failed to evaluate to true
     if (dart.library.html) 'src/platforms/web.dart'
+    if (dart.library.js_interop) 'src/platforms/web.dart'
     if (dart.library.io) 'src/platforms/vm.dart' as time_machine;
 
 export 'src/calendar_system.dart' show CalendarSystem;

pubspec.yaml

@@ -14,7 +14,7 @@ platforms:
 # SDK's lower bound must be compatible with the current version pushed with Flutter
 # ./flutter --version
 environment:
-  sdk: ">=2.19.0 <4.0.0"
+  sdk: ">=3.3.0 <4.0.0"
 
 # Verify flutter_test dependency compatibility first before updating any constraints
 # https://github.com/flutter/flutter/blob/master/packages/flutter_test/pubspec.yaml
@@ -23,6 +23,7 @@ dependencies:
   collection: ^1.18.0
   http: ^1.2.2
   meta: ^1.15.0
+  universal_io: ^2.2.0
 
 dev_dependencies:
   args: ^2.0.0

test/testing/test_fx.dart

@@ -3,7 +3,7 @@
 // Use of this source code is governed by the Apache License 2.0, as found in the LICENSE.txt file.
 import 'dart:async';
 import 'dart:mirrors';
-import 'dart:io';
+import 'package:universal_io/io.dart';
 
 import 'package:test/test.dart';
 import 'package:time_machine2/src/time_machine_internal.dart';

tool/culture_compiler/decode_to_json.dart

@@ -1,5 +1,5 @@
 import 'dart:convert';
-import 'dart:io';
+import 'package:universal_io/io.dart';
 import 'dart:typed_data';
 
 import 'package:time_machine2/src/time_machine_internal.dart';

tool/culture_compiler/encode_dart.dart

@@ -1,4 +1,4 @@
-import 'dart:io';
+import 'package:universal_io/io.dart';
 import 'dart:typed_data';
 
 import 'package:path/path.dart' as p;

tool/culture_compiler/encode_json_to_bin.dart

@@ -1,5 +1,5 @@
 import 'dart:convert';
-import 'dart:io';
+import 'package:universal_io/io.dart';
 
 import 'package:time_machine2/src/time_machine_internal.dart';
 

tool/tzdb_compiler/main.dart

@@ -2,7 +2,7 @@
 // Portions of this work are Copyright 2018 The Noda Time Authors. All rights reserved.
 // Use of this source code is governed by the Apache License 2.0, as found in the LICENSE.txt file.
 
-import 'dart:io';
+import 'package:universal_io/io.dart';
 import 'dart:typed_data';
 
 import 'package:path/path.dart' as path;

tool/tzdb_compiler/tzdb/cldr_windows_zone_parser.dart

@@ -1,4 +1,4 @@
-import 'dart:io' as io;
+import 'package:universal_io/io.dart' as io;
 
 import 'package:xml/xml.dart' as xml;
 

tool/tzdb_compiler/tzdb/file_source.dart

@@ -1,4 +1,4 @@
-import 'dart:io';
+import 'package:universal_io/io.dart';
 import 'dart:convert';
 
 import 'package:archive/archive.dart';

tool/tzdb_compiler/tzdb/tzdb_zone_info_compiler.dart

@@ -2,7 +2,7 @@
 // Portions of this work are Copyright 2018 The Noda Time Authors. All rights reserved.
 // Use of this source code is governed by the Apache License 2.0, as found in the LICENSE.txt file.
 
-import 'dart:io';
+import 'package:universal_io/io.dart';
 
 import 'package:http/http.dart' as http;
 import 'package:time_machine2/src/time_machine_internal.dart';