🚧 Added flutter_lints, provider

iNcrease dart sdk, UI overhauls, function optimization

analysis_options.yaml

@@ -22,8 +22,7 @@ linter:
   # `// ignore_for_file: name_of_lint` syntax on the line or in the file
   # producing the lint.
   rules:
-    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    avoid_print: false # Uncomment to disable the `avoid_print` rule
     # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
-
 # Additional information about this file can be found at
 # https://dart.dev/guides/language/analysis-options

lib/Utils/bmi_enums.dart

@@ -0,0 +1,14 @@
+enum BmiEnums {
+  severlyUnderweight("Serverly Underweight", null, 16),
+  underweight("Underweight", 16, 18.5),
+  normal("Normal", 18.5, 25),
+  overweight("Overweight", 25, 30),
+  moderatelyObese("Moderately Obese", 30, 35),
+  severelyObese(
+      "Severely Obese", 35, null); // max value is jus a very large value
+
+  const BmiEnums(this.description, this.min, this.max);
+  final String description;
+  final double? min;
+  final double? max;
+}

lib/Utils/bmi_utils.dart

@@ -0,0 +1,8 @@
+class BmiUtils {
+  /// a function that takes weight and height and return BMI value
+  static double calculateBmi(double height, double weight) {
+    return weight / (height * height);
+  }
+
+  /// TODO; BMI value validator
+}

lib/Utils/link_launcher.dart

@@ -0,0 +1,13 @@
+import 'package:flutter/material.dart';
+import 'package:fluttertoast/fluttertoast.dart';
+import 'package:url_launcher/url_launcher.dart';
+
+class LinkLauncher {
+  ///  launch the given url
+  static void launch(String url) async {
+    if (!await launchUrl(Uri.parse(url))) {
+      Fluttertoast.showToast(
+          msg: "Cannot launch url $url", backgroundColor: Colors.red);
+    }
+  }
+}