SG MEDIA

[surahatagumaneh]

imimportport 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'dart:async'; // Required for DateTime.now().subtract

/// DATA_MODEL
/// Represents a user profile within the social media application.
class User {
final String username;
final String profileImageUrl;
final String bio;
final int postCount;
final int followerCount;
final int followingCount;

User({
required this.username,
required this.profileImageUrl,
this.bio = '',
this.postCount = 0,
this.followerCount = 0,
this.followingCount = 0,
});
}

/// Represents a single post with associated user, media, and engagement metrics.
class Post {
final User user;
final String? imageUrl; // Nullable, as it might be a video
final bool isVideo; // New: indicates if this post is a video
final String? videoThumbnailUrl; // New: URL for video thumbnail
final String caption;
int likes; // Modifiable to reflect user interaction
int comments; // Modifiable
bool isLiked; // New: Tracks if the current user has liked this post
final DateTime timestamp;

Post({
required this.user,
this.imageUrl,
this.isVideo = false,
this.videoThumbnailUrl,
this.caption = '',
this.likes = 0,
this.comments = 0,
this.isLiked = false,
required this.timestamp,
}) : assert(
(imageUrl != null && !isVideo && videoThumbnailUrl == null) ||
(videoThumbnailUrl != null && isVideo && imageUrl == null),
'A post must contain either an imageUrl (if not a video) or a videoThumbnailUrl (if a video).');
}

/// Manages the data for the main feed, including a list of posts.
/// Notifies listeners when the data changes (e.g., when a post is liked).
class FeedData extends ChangeNotifier {
final List _posts;

List get posts => _posts;

FeedData() : _posts = _generateDummyPosts();

/// Generates a static list of dummy posts for demonstration.
static List _generateDummyPosts() {
// Note: The profileImageUrl here should ideally match the one used in AuthData
// for the 'bespoke_ui_dev' user if they log in. For simplicity, it's hardcoded
// here to ensure the dummy posts display correctly.
final User currentUser = User(
username: 'bespoke_ui_dev',
profileImageUrl: 'https://www.gstatic.com/flutter-onestack-prototype/genui/example_1.jpg',
bio: 'Flutter enthusiast | UI/UX Designer',
postCount: 15,
followerCount: 1234,
followingCount: 567,
);

final User user1 = User(
  username: 'travel_junkie',
  profileImageUrl: 'https://www.gstatic.com/flutter-onestack-prototype/genui/example_1.jpg',
);
final User user2 = User(
  username: 'foodie_explorer',
  profileImageUrl: 'https://www.gstatic.com/flutter-onestack-prototype/genui/example_1.jpg',
);
final User user3 = User(
  username: 'coding_daily',
  profileImageUrl: 'https://www.gstatic.com/flutter-onestack-prototype/genui/example_1.jpg',
);

return <Post>[
  Post(
    user: user1,
    imageUrl: 'https://www.gstatic.com/flutter-onestack-prototype/genui/example_1.jpg',
    caption: 'Beautiful sunset views from the mountain top! ⛰️🌅 #travel #nature',
    likes: 1250,
    comments: 35,
    isLiked: false,
    timestamp: DateTime.now().subtract(const Duration(hours: 2)),
  ),
  Post(
    user: user2,
    imageUrl: 'https://www.gstatic.com/flutter-onestack-prototype/genui/example_1.jpg',
    caption: 'Delicious homemade pasta! So proud of this dish. 🍝 #foodie #cooking',
    likes: 890,