From 8d53602183e3f3fff5a29ab61a8b0b7d9fac5e8e Mon Sep 17 00:00:00 2001
From: kamilia <Admin@DESKTOP-NFSG25N>
Date: Tue, 24 Sep 2024 00:51:45 +0400
Subject: [PATCH] =?UTF-8?q?=D1=82=D1=8F=D0=B6=D0=BA=D0=BE=20=D0=B1=D1=8B?=
 =?UTF-8?q?=D0=BB=D0=BE?=
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Content-Transfer-Encoding: 8bit

---
 lib/AnimalName.dart |  8 ++++
 lib/animal.dart     | 19 ++++++++-
 lib/main.dart       | 94 ++++++++++++++++++++++++++++++++-------------
 3 files changed, 92 insertions(+), 29 deletions(-)
 create mode 100644 lib/AnimalName.dart

diff --git a/lib/AnimalName.dart b/lib/AnimalName.dart
new file mode 100644
index 0000000..e95ef4b
--- /dev/null
+++ b/lib/AnimalName.dart
@@ -0,0 +1,8 @@
+//Enums
+enum AnimalName {
+  lion,
+  elephant,
+  giraffe,
+  tiger,
+  zebra,
+}
\ No newline at end of file
diff --git a/lib/animal.dart b/lib/animal.dart
index 2c229e2..71cbe14 100644
--- a/lib/animal.dart
+++ b/lib/animal.dart
@@ -1,6 +1,21 @@
+import 'AnimalName.dart';
+
+//Classes
 class Animal {
-  final String name;
+  final AnimalName name;
   final String description;
 
   Animal({required this.name, required this.description});
-}
\ No newline at end of file
+
+  //Methods
+  String printAnimal() {
+    return 'Name: ${name.toStringName()}, Description: $description';
+  }
+}
+
+  // Extension
+  extension AnimalNameExtension on AnimalName {
+    String toStringName() {
+      return toString().split('.').last;
+    }
+  }
\ No newline at end of file
diff --git a/lib/main.dart b/lib/main.dart
index b455c6c..c95b9af 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'animal.dart';
+import 'AnimalName.dart';
 
 void main() {
   runApp(const MyApp());
@@ -11,7 +12,7 @@ class MyApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Зоопарк',
+      title: 'Zoo',
       theme: ThemeData(
         colorScheme: ColorScheme.fromSeed(seedColor: Colors.orange),
         useMaterial3: true,
@@ -28,7 +29,7 @@ class HomeScreen extends StatelessWidget {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text('Зоопарк'),
+        title: const Text('Zoo'),
       ),
       body: Center(
         child: ElevatedButton(
@@ -41,46 +42,85 @@ class HomeScreen extends StatelessWidget {
             );
           },
           style: ElevatedButton.styleFrom(
-            padding: const EdgeInsets.symmetric(horizontal: 40, vertical: 20), // Увеличиваем размер кнопки
-            textStyle: const TextStyle(fontSize: 22), // Увеличиваем размер текста
+            padding: const EdgeInsets.symmetric(horizontal: 40, vertical: 20),
+            textStyle: const TextStyle(fontSize: 34),
           ),
-          child: const Text('Показать список животных'),
+          child: const Text('Show Animal List'),
         ),
       ),
     );
   }
 }
 
-class AnimalListScreen extends StatelessWidget {
+class AnimalListScreen extends StatefulWidget {
   const AnimalListScreen({super.key});
 
   @override
-  Widget build(BuildContext context) {
-    final List<Animal> animals = [
-      Animal(name: 'Лев', description: 'Король зверей'),
-      Animal(name: 'Слон', description: 'Крупнейшее наземное животное'),
-      Animal(name: 'Жираф', description: 'Животное с самой длинной шеей'),
-      Animal(name: 'Тигр', description: 'Большая кошка с полосатым мехом'),
-      Animal(name: 'Зебра', description: 'Полосатая лошадь'),
+  _AnimalListScreenState createState() => _AnimalListScreenState();
+}
+
+class _AnimalListScreenState extends State<AnimalListScreen> {
+  late Future<List<Animal>> _animalsFuture;
+
+  @override
+  void initState() {
+    super.initState();
+    _animalsFuture = _fetchAnimals();
+  }
+  //Generics (можно использовать List<>)
+  Future<List<Animal>> _fetchAnimals() async {
+    // Future
+    await Future.delayed(const Duration(seconds: 2));
+
+    final animals = [
+      Animal(name: AnimalName.lion, description: 'King of the jungle'),
+      Animal(name: AnimalName.elephant, description: 'Largest land animal'),
+      Animal(name: AnimalName.giraffe, description: 'Animal with the longest neck'),
+      Animal(name: AnimalName.tiger, description: 'Big cat with striped fur'),
+      Animal(name: AnimalName.zebra, description: 'Striped horse'),
     ];
 
+    // Loops
+    for (var animal in animals) {
+      print(animal.printAnimal());
+    }
+
+    return animals;
+  }
+
+  @override
+  Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text('Список животных'),
+        title: const Text('Animal List'),
       ),
-      body: ListView.builder(
-        itemCount: animals.length,
-        itemBuilder: (context, index) {
-          return ListTile(
-            title: Text(
-              animals[index].name,
-              style: const TextStyle(fontSize: 24), // Увеличиваем размер текста
-            ),
-            subtitle: Text(
-              animals[index].description,
-              style: const TextStyle(fontSize: 20), // Увеличиваем размер текста
-            ),
-          );
+      body: FutureBuilder<List<Animal>>(
+        future: _animalsFuture,
+        builder: (context, snapshot) {
+          if (snapshot.connectionState == ConnectionState.waiting) {
+            return const Center(child: CircularProgressIndicator());
+          } else if (snapshot.hasError) {
+            return Center(child: Text('Error: ${snapshot.error}'));
+          } else if (!snapshot.hasData || snapshot.data!.isEmpty) {
+            return const Center(child: Text('No animals found.'));
+          } else {
+            final animals = snapshot.data!;
+            return ListView.builder(
+              itemCount: animals.length,
+              itemBuilder: (context, index) {
+                return ListTile(
+                  title: Text(
+                    animals[index].name.toString().split('.').last,
+                    style: const TextStyle(fontSize: 34),
+                  ),
+                  subtitle: Text(
+                    animals[index].description,
+                    style: const TextStyle(fontSize: 26),
+                  ),
+                );
+              },
+            );
+          }
         },
       ),
     );