second commit

lib/core/utils/extensions.dart

@@ -0,0 +1,59 @@
+import 'package:flutter/material.dart';
+
+import '../theme/app_dimens.dart';
+
+extension BuildContextX on BuildContext {
+  ThemeData get theme => Theme.of(this);
+  TextTheme get text => Theme.of(this).textTheme;
+  ColorScheme get colors => Theme.of(this).colorScheme;
+
+  Size get screen => MediaQuery.sizeOf(this);
+  double get screenWidth => MediaQuery.sizeOf(this).width;
+  double get screenHeight => MediaQuery.sizeOf(this).height;
+
+  bool get isCompact => AppBreakpoints.isCompact(screenWidth);
+  bool get isMedium => AppBreakpoints.isMedium(screenWidth);
+  bool get isExpanded => AppBreakpoints.isExpanded(screenWidth);
+
+  /// Picks a value appropriate to the current breakpoint.
+  T responsive<T>({required T compact, T? medium, required T expanded}) {
+    if (isCompact) return compact;
+    if (isExpanded) return expanded;
+    return medium ?? expanded;
+  }
+
+  void showSnack(String message, {Color? background}) {
+    ScaffoldMessenger.of(this)
+      ..hideCurrentSnackBar()
+      ..showSnackBar(SnackBar(
+        content: Text(message),
+        backgroundColor: background,
+        duration: const Duration(seconds: 2),
+      ));
+  }
+}
+
+extension DoubleX on double {
+  /// Rounds to two decimals to avoid floating point drift in money maths.
+  double get asMoney => (this * 100).roundToDouble() / 100;
+
+  /// Indian retail round-off to the nearest rupee.
+  double get roundedToRupee => roundToDouble();
+}
+
+extension StringX on String {
+  String get capitalized =>
+      isEmpty ? this : '${this[0].toUpperCase()}${substring(1)}';
+
+  bool containsIgnoreCase(String other) =>
+      toLowerCase().contains(other.toLowerCase());
+}
+
+extension IterableX<T> on Iterable<T> {
+  T? firstWhereOrNull(bool Function(T) test) {
+    for (final element in this) {
+      if (test(element)) return element;
+    }
+    return null;
+  }
+}