LabWork04 is Done

lib/domain/models/comment.dart

@@ -0,0 +1,13 @@
+import 'user.dart';
+
+class CommentModel {
+  final String title;
+  final String text;
+  final UserModel user;
+
+  CommentModel({
+    required this.title,
+    required this.text,
+    required this.user,
+  });
+}

lib/domain/models/user.dart

@@ -0,0 +1,9 @@
+class UserModel {
+  final String nickname;
+  final String? avatarUrl;
+
+  UserModel({
+    required this.nickname,
+    this.avatarUrl,
+  });
+}

lib/main.dart

@@ -1,5 +1,7 @@
 import 'package:flutter/material.dart';
 
+import 'package:pmu_labworks/view/home_page/home_page.dart';
+
 void main() {
   runApp(const MyApp());
 }
@@ -7,119 +9,16 @@ void main() {
 class MyApp extends StatelessWidget {
   const MyApp({super.key});
 
-  // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter Demo',
+      title: 'Comments App',
+      debugShowCheckedModeBanner: false,
       theme: ThemeData(
-        // This is the theme of your application.
-        //
-        // TRY THIS: Try running your application with "flutter run". You'll see
-        // the application has a purple toolbar. Then, without quitting the app,
-        // try changing the seedColor in the colorScheme below to Colors.green
-        // and then invoke "hot reload" (save your changes or press the "hot
-        // reload" button in a Flutter-supported IDE, or press "r" if you used
-        // the command line to start the app).
-        //
-        // Notice that the counter didn't reset back to zero; the application
-        // state is not lost during the reload. To reset the state, use hot
-        // restart instead.
-        //
-        // This works for code too, not just values: Most code changes can be
-        // tested with just a hot reload.
-        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
+        colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
         useMaterial3: true,
       ),
-      home: const MyHomePage(title: 'Flutter Demo Home Page'),
-    );
-  }
-}
-
-class MyHomePage extends StatefulWidget {
-  const MyHomePage({super.key, required this.title});
-
-  // This widget is the home page of your application. It is stateful, meaning
-  // that it has a State object (defined below) that contains fields that affect
-  // how it looks.
-
-  // This class is the configuration for the state. It holds the values (in this
-  // case the title) provided by the parent (in this case the App widget) and
-  // used by the build method of the State. Fields in a Widget subclass are
-  // always marked "final".
-
-  final String title;
-
-  @override
-  State<MyHomePage> createState() => _MyHomePageState();
-}
-
-class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
-
-  void _incrementCounter() {
-    setState(() {
-      // This call to setState tells the Flutter framework that something has
-      // changed in this State, which causes it to rerun the build method below
-      // so that the display can reflect the updated values. If we changed
-      // _counter without calling setState(), then the build method would not be
-      // called again, and so nothing would appear to happen.
-      _counter++;
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
-    // by the _incrementCounter method above.
-    //
-    // The Flutter framework has been optimized to make rerunning build methods
-    // fast, so that you can just rebuild anything that needs updating rather
-    // than having to individually change instances of widgets.
-    return Scaffold(
-      appBar: AppBar(
-        // TRY THIS: Try changing the color here to a specific color (to
-        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
-        // change color while the other colors stay the same.
-        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        // Here we take the value from the MyHomePage object that was created by
-        // the App.build method, and use it to set our appbar title.
-        title: Text(widget.title),
-      ),
-      body: Center(
-        // Center is a layout widget. It takes a single child and positions it
-        // in the middle of the parent.
-        child: Column(
-          // Column is also a layout widget. It takes a list of children and
-          // arranges them vertically. By default, it sizes itself to fit its
-          // children horizontally, and tries to be as tall as its parent.
-          //
-          // Column has various properties to control how it sizes itself and
-          // how it positions its children. Here we use mainAxisAlignment to
-          // center the children vertically; the main axis here is the vertical
-          // axis because Columns are vertical (the cross axis would be
-          // horizontal).
-          //
-          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
-          // action in the IDE, or press "p" in the console), to see the
-          // wireframe for each widget.
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            const Text(
-              'You have pushed the button this many times:',
-            ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headlineMedium,
-            ),
-          ],
-        ),
-      ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: const Icon(Icons.add),
-      ), // This trailing comma makes auto-formatting nicer for build methods.
+      home: const HomePage(title: 'Comments App'),
     );
   }
 }

lib/view/details_page/details_page.dart

@@ -0,0 +1,78 @@
+import 'package:flutter/material.dart';
+
+import 'package:pmu_labworks/domain/models/comment.dart';
+
+class DetailsPage extends StatelessWidget {
+  final CommentModel model;
+
+  const DetailsPage(this.model, {super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('${model.user.nickname}\'s comment'),
+      ),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Stack(
+              children: [
+                ClipRRect(
+                  borderRadius: BorderRadius.circular(8.0),
+                  child: model.user.avatarUrl != null
+                      ? Image.network(
+                          model.user.avatarUrl!,
+                          height: 150,
+                          width: 150,
+                          fit: BoxFit.cover,
+                        )
+                      : Container(
+                          height: 150,
+                          width: 150,
+                          color: Colors.grey,
+                          child: const Icon(Icons.person, size: 50),
+                        ),
+                ),
+                Positioned(
+                  left: 8,
+                  bottom: 8,
+                  child: Container(
+                    padding: const EdgeInsets.symmetric(
+                        vertical: 4.0, horizontal: 8.0),
+                    color: Colors.black.withOpacity(0.6),
+                    child: Text(
+                      model.user.nickname,
+                      style: const TextStyle(
+                        color: Colors.white,
+                        fontWeight: FontWeight.bold,
+                        fontSize: 16,
+                      ),
+                    ),
+                  ),
+                ),
+              ],
+            ),
+            const SizedBox(height: 24),
+            Text(
+              model.title,
+              style: const TextStyle(
+                fontSize: 24,
+                fontWeight: FontWeight.bold,
+              ),
+            ),
+            const SizedBox(height: 16),
+            Text(
+              model.text,
+              style: const TextStyle(
+                fontSize: 16,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/view/home_page/comment.dart

@@ -0,0 +1,159 @@
+part of 'home_page.dart';
+
+typedef OnActionCallback = void Function(
+    String nickname, bool isLiked, bool isDisliked)?;
+
+class _Comment extends StatefulWidget {
+  final String title;
+  final String text;
+  final UserModel? user;
+  final OnActionCallback onAction;
+  final VoidCallback? onTap;
+
+  const _Comment({
+    required this.title,
+    required this.text,
+    this.user,
+    this.onAction,
+    this.onTap,
+  });
+
+  factory _Comment.fromData(
+    CommentModel model, {
+    OnActionCallback onAction,
+    VoidCallback? onTap,
+  }) =>
+      _Comment(
+        title: model.title,
+        text: model.text,
+        user: model.user,
+        onAction: onAction,
+        onTap: onTap,
+      );
+
+  @override
+  State<_Comment> createState() => _CommentState();
+}
+
+class _CommentState extends State<_Comment> {
+  bool isLiked = false;
+  bool isDisliked = false;
+
+  void _onLike() {
+    setState(() {
+      isLiked = !isLiked;
+      if (isLiked && isDisliked) {
+        isDisliked = false;
+      }
+    });
+    if (widget.onAction != null) {
+      widget.onAction?.call(widget.user!.nickname, isLiked, isDisliked);
+    }
+  }
+
+  void _onDislike() {
+    setState(() {
+      isDisliked = !isDisliked;
+      if (isDisliked && isLiked) {
+        isLiked = false;
+      }
+    });
+    if (widget.onAction != null) {
+      widget.onAction?.call(widget.user!.nickname, isLiked, isDisliked);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: widget.onTap,
+      child: Container(
+        margin: const EdgeInsets.all(16),
+        padding: const EdgeInsets.all(16),
+        decoration: BoxDecoration(
+          color: Colors.white70,
+          borderRadius: BorderRadius.circular(16),
+          border: Border.all(color: Colors.grey),
+          boxShadow: [
+            BoxShadow(
+              color: Colors.grey.withOpacity(.5),
+              spreadRadius: 4,
+              offset: const Offset(0, 5),
+              blurRadius: 8,
+            ),
+          ],
+        ),
+        child: Row(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Column(
+              children: [
+                ClipRRect(
+                  borderRadius: BorderRadius.circular(30),
+                  child: SizedBox(
+                    height: 80,
+                    width: 80,
+                    child: Image.network(
+                      widget.user!.avatarUrl != null &&
+                              widget.user!.avatarUrl!.isNotEmpty
+                          ? widget.user!.avatarUrl!
+                          : '',
+                      fit: BoxFit.cover,
+                      errorBuilder: (_, __, ___) => const Placeholder(),
+                    ),
+                  ),
+                ),
+                const SizedBox(height: 8),
+                Text(
+                  widget.user!.nickname,
+                  style: Theme.of(context).textTheme.bodyMedium,
+                ),
+                Row(
+                  children: [
+                    IconButton(
+                      iconSize: 20,
+                      icon: Icon(
+                        isLiked ? Icons.thumb_up : Icons.thumb_up_outlined,
+                        color: isLiked ? Colors.blue : Colors.grey,
+                      ),
+                      onPressed: _onLike,
+                    ),
+                    IconButton(
+                      iconSize: 20,
+                      icon: Icon(
+                        isDisliked
+                            ? Icons.thumb_down
+                            : Icons.thumb_down_outlined,
+                        color: isDisliked ? Colors.red : Colors.grey,
+                      ),
+                      onPressed: _onDislike,
+                    ),
+                  ],
+                ),
+              ],
+            ),
+            Expanded(
+              child: Padding(
+                padding: const EdgeInsets.only(left: 16.0),
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text(
+                      widget.title,
+                      style: Theme.of(context).textTheme.headlineSmall,
+                    ),
+                    const SizedBox(height: 8),
+                    Text(
+                      widget.text,
+                      style: Theme.of(context).textTheme.bodyLarge,
+                    ),
+                  ],
+                ),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/view/home_page/home_page.dart

@@ -0,0 +1,164 @@
+import 'dart:math';
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+import 'package:pmu_labworks/domain/models/comment.dart';
+import 'package:pmu_labworks/domain/models/user.dart';
+
+import 'package:pmu_labworks/view/details_page/details_page.dart';
+
+part 'comment.dart';
+
+class HomePage extends StatefulWidget {
+  const HomePage({super.key, required this.title});
+
+  final String title;
+
+  @override
+  State<HomePage> createState() => _HomePageState();
+}
+
+class _HomePageState extends State<HomePage> {
+  Color _color = Colors.transparent;
+
+  @override
+  void initState() {
+    super.initState();
+    _color = _generateColor();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        backgroundColor: _color,
+        title: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text(widget.title,
+                style: TextStyle(
+                  fontSize: 20,
+                  fontWeight: FontWeight.bold,
+                )),
+            Text(
+              'made by Factorino',
+              style: TextStyle(
+                fontSize: 12,
+                fontStyle: FontStyle.italic,
+              ),
+            ),
+          ],
+        ),
+      ),
+      body: const Body(),
+    );
+  }
+
+  Color _generateColor() {
+    final Random random = Random();
+    final int red = (random.nextInt(106) + 150);
+    final int green = (random.nextInt(106) + 150);
+    final int blue = (random.nextInt(106) + 150);
+
+    return Color.fromARGB(255, red, green, blue);
+  }
+}
+
+class Body extends StatelessWidget {
+  const Body({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final data = [
+      CommentModel(
+        title: 'Oh my god',
+        text: 'this app is so cool ' * 10,
+        user: UserModel(
+          nickname: 'Steve',
+          avatarUrl:
+              'https://preview.free3d.com/img/2016/03/1875481443430303321/hld8c0oa.jpg',
+        ),
+      ),
+      CommentModel(
+        title: 'Listen to me',
+        text: 'This app is like Half-Life 3 - it will never be released',
+        user: UserModel(
+          nickname: 'G-Man',
+          avatarUrl:
+              'https://us-tuna-sounds-images.voicemod.net/356aeabd-18d5-40d8-af31-b479f4eff183-1704672174928.png',
+        ),
+      ),
+      CommentModel(
+        title: 'BREAKING!!!',
+        text:
+            'ONLY NOW you can purchase the ability to put likes and dislikes for only 299\$',
+        user: UserModel(
+          nickname: 'Bethesda',
+          avatarUrl: 'https://i.playground.ru/p/BWixorSTeZQfoPvdVL9lgA.jpeg',
+        ),
+      ),
+      CommentModel(
+        title: 'Test',
+        text: 'Test',
+        user: UserModel(
+          nickname: 'Noname',
+        ),
+      ),
+      CommentModel(
+        title: 'Test',
+        text: 'Test',
+        user: UserModel(
+          nickname: 'Noname',
+        ),
+      ),
+    ];
+
+    return Center(
+      child: SingleChildScrollView(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: data.map((data) {
+            return _Comment.fromData(
+              data,
+              onAction: (String nickname, bool isLiked, bool isDisliked) =>
+                  _showSnackBar(context, nickname, isLiked, isDisliked),
+              onTap: () => _navToDetails(context, data),
+            );
+          }).toList(),
+        ),
+      ),
+    );
+  }
+
+  void _navToDetails(BuildContext context, CommentModel data) {
+    Navigator.push(
+      context,
+      CupertinoPageRoute(builder: (context) => DetailsPage(data)),
+    );
+  }
+
+  void _showSnackBar(
+      BuildContext context, String nickname, bool isLiked, bool isDisliked) {
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      final String action;
+
+      if (isLiked) {
+        action = 'liked';
+      } else if (isDisliked) {
+        action = 'disliked';
+      } else {
+        action = 'neutralized'; // Состояние без лайков/дизлайков
+      }
+
+      ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+        content: Text(
+          '$nickname\'s comment $action',
+          style: Theme.of(context).textTheme.bodyLarge,
+        ),
+        backgroundColor: Colors.white70,
+        duration: const Duration(seconds: 1),
+      ));
+    });
+  }
+}