Working auth and added shared notes

lib/global/utils.dart

@@ -2,8 +2,11 @@ import 'dart:math';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:helpers/helpers/print.dart';
 import 'package:intl/intl.dart';
+import 'package:rluv/global/styles.dart';
+import 'package:rluv/main.dart';
 
 String formatDate(DateTime time) {
   return DateFormat('EEEE, dd MMMM yyyy').format(time);
@@ -70,3 +73,59 @@ void setDevicePortraitOrientation() {
     DeviceOrientation.portraitDown,
   ]);
 }
+
+enum SnackType { info, success, error }
+
+void showSnack(
+    {required WidgetRef ref,
+    required String text,
+    SnackType type = SnackType.info,
+    Duration duration = const Duration(seconds: 2)}) {
+  final messengerKey = ref.read(scaffoldMessengerKeyProvider);
+  if (messengerKey.currentState == null) {
+    printPink('Cannot show snackbar, state == null');
+    return;
+  }
+  final color = type == SnackType.info
+      ? Styles.washedStone
+      : type == SnackType.success
+          ? Styles.seaweedGreen
+          : Styles.expensesRed;
+  final textStyle = TextStyle(
+    fontSize: 16,
+    color: color,
+  );
+  messengerKey.currentState!.showSnackBar(SnackBar(
+    elevation: 8,
+    backgroundColor: Styles.deepPurpleNurple,
+    shape: const RoundedRectangleBorder(
+      borderRadius: BorderRadius.only(
+          topLeft: Radius.circular(20.0), topRight: Radius.circular(20.0)),
+    ),
+    content: Padding(
+      padding: const EdgeInsets.all(8.0),
+      child: Row(
+        children: [
+          Padding(
+            padding: const EdgeInsets.only(right: 14.0),
+            child: Icon(
+                type == SnackType.success ? Icons.check_circle : Icons.info,
+                color: color),
+          ),
+          Text(text, style: textStyle),
+        ],
+      ),
+    ),
+  ));
+}
+
+bool isEmailValid(String email) {
+  final RegExp regex =
+      RegExp(r"^[a-zA-Z0-9.a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,6}$");
+  return regex.hasMatch(email);
+}
+
+bool isUsernameValid(String username) {
+  final RegExp regex = RegExp(r"[a-zA-Z0-9._-]");
+  return regex.hasMatch(username);
+}