init

lib/features/core/data/constants/const_colors.dart

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+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+abstract class ConstColours {
+  /// Smoke Gray => a neutral grey with neutral warmth/cold
+  static const imageBackgroundColour = Color.fromRGBO(127, 127, 125, 1.0);
+
+  static const white = Colors.white;
+  static const black = Colors.black;
+}
+
+abstract class ConstThemes {
+  static ThemeData get materialLightTheme => ThemeData(
+        useMaterial3: true,
+        brightness: Brightness.light,
+        colorSchemeSeed: ConstColours.white,
+      );
+
+  static ThemeData get materialDarkTheme => ThemeData(
+        useMaterial3: true,
+        brightness: Brightness.dark,
+        colorSchemeSeed: ConstColours.white,
+      );
+
+  static CupertinoThemeData get cupertinoLightTheme => const CupertinoThemeData(
+        brightness: Brightness.light,
+      );
+  static CupertinoThemeData get cupertinoDarkTheme => const CupertinoThemeData(
+        brightness: Brightness.dark,
+      );
+  static ThemeData get cupertinoThemeLightHack =>
+      materialLightTheme.copyWith(cupertinoOverrideTheme: cupertinoLightTheme);
+  static ThemeData get cupertinoThemeDarkHack =>
+      materialDarkTheme.copyWith(cupertinoOverrideTheme: cupertinoDarkTheme);
+}

lib/features/core/data/enums/view_model_state.dart

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+enum ViewModelState {
+  isInitialising,
+  isInitialised,
+  isBusy,
+  hasError;
+}

lib/features/core/data/extensions/context_extensions.dart

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+import 'package:flutter/foundation.dart';
+import 'package:flutter/widgets.dart';
+
+extension DarkMode on BuildContext {
+  /// is dark mode currently enabled?
+  ///
+  /// Using the context version in release throws exception.
+  bool get isDarkMode =>
+      WidgetsBinding.instance.platformDispatcher.platformBrightness == Brightness.dark;
+
+  double get width => MediaQuery.of(this).size.width;
+  double get height => MediaQuery.of(this).size.height;
+}

lib/features/core/data/extensions/dio_extensions.dart

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+import 'package:dio/dio.dart';
+
+extension ResponseExtensions on Response {
+  /// Shorthand for getting response's successful state.
+  bool get isSuccessful => (data as Map)['response'];
+}

lib/features/core/data/extensions/list_extensions.dart

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+extension ListExtensions<T> on List<T> {
+  List<T> get deepCopy => [...this];
+}

lib/features/core/data/extensions/map_extensions.dart

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+extension MapExtensions<A, B> on Map<A, B> {
+  Map<A, B> get deepCopy => {...this};
+}

lib/features/core/data/extensions/stream_extensions.dart

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+import 'package:flutter/foundation.dart';
+
+extension StreamExtensions<T> on Stream<T> {
+  ValueListenable<T> toValueNotifier(
+    T initialValue, {
+    bool Function(T previous, T current)? notifyWhen,
+  }) {
+    final notifier = ValueNotifier<T>(initialValue);
+    listen((value) {
+      if (notifyWhen == null || notifyWhen(notifier.value, value)) {
+        notifier.value = value;
+      }
+    });
+    return notifier;
+  }
+
+  ValueListenable<T?> toNullableValueNotifier({
+    bool Function(T? previous, T? current)? notifyWhen,
+  }) {
+    final notifier = ValueNotifier<T?>(null);
+    listen((value) {
+      if (notifyWhen == null || notifyWhen(notifier.value, value)) {
+        notifier.value = value;
+      }
+    });
+    return notifier;
+  }
+
+  Listenable toListenable() {
+    final notifier = ChangeNotifier();
+    listen((_) {
+      // ignore: invalid_use_of_protected_member, invalid_use_of_visible_for_testing_member
+      notifier.notifyListeners();
+    });
+    return notifier;
+  }
+}