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lib/core/utils/extensions.dart

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+import 'package:flutter/material.dart';
+
+extension BuildContextExtension on BuildContext {
+  ThemeData get theme => Theme.of(this);
+  TextTheme get textTheme => Theme.of(this).textTheme;
+  ColorScheme get colorScheme => Theme.of(this).colorScheme;
+  MediaQueryData get mediaQuery => MediaQuery.of(this);
+  Size get screenSize => MediaQuery.sizeOf(this);
+  double get screenWidth => screenSize.width;
+  double get screenHeight => screenSize.height;
+  bool get isMobile => screenWidth < 600;
+  bool get isTablet => screenWidth >= 600 && screenWidth < 1200;
+  bool get isDesktop => screenWidth >= 1200;
+
+  void showSnackBar(String message, {bool isError = false}) {
+    ScaffoldMessenger.of(this).showSnackBar(
+      SnackBar(
+        content: Text(message),
+        backgroundColor: isError ? colorScheme.error : null,
+        behavior: SnackBarBehavior.floating,
+      ),
+    );
+  }
+}
+
+extension StringExtension on String {
+  String get capitalize =>
+      isEmpty ? this : '${this[0].toUpperCase()}${substring(1)}';
+
+  bool get isValidEmail => RegExp(
+        r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$',
+      ).hasMatch(this);
+
+  bool get isValidPassword => length >= 8;
+}
+
+extension DateTimeExtension on DateTime {
+  String get toFormattedString => '$year-${month.toString().padLeft(2, '0')}-${day.toString().padLeft(2, '0')}';
+
+  String get toFormattedDateTime =>
+      '$toFormattedString ${hour.toString().padLeft(2, '0')}:${minute.toString().padLeft(2, '0')}';
+}