news page

lib/features/news/domain/entities/news_article.dart

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+/// Domain Entity: News Article
+///
+/// Pure business entity representing a news article or blog post.
+/// This entity is framework-independent and contains only business logic.
+library;
+
+/// News Article Entity
+///
+/// Represents a news article/blog post in the app.
+/// Used for displaying news, tips, project showcases, and professional content.
+class NewsArticle {
+  /// Unique article ID
+  final String id;
+
+  /// Article title
+  final String title;
+
+  /// Article excerpt/summary
+  final String excerpt;
+
+  /// Full article content (optional, may load separately)
+  final String? content;
+
+  /// Featured image URL
+  final String imageUrl;
+
+  /// Article category
+  final NewsCategory category;
+
+  /// Publication date
+  final DateTime publishedDate;
+
+  /// View count
+  final int viewCount;
+
+  /// Estimated reading time in minutes
+  final int readingTimeMinutes;
+
+  /// Whether this is a featured article
+  final bool isFeatured;
+
+  /// Author name (optional)
+  final String? authorName;
+
+  /// Author avatar URL (optional)
+  final String? authorAvatar;
+
+  /// Constructor
+  const NewsArticle({
+    required this.id,
+    required this.title,
+    required this.excerpt,
+    this.content,
+    required this.imageUrl,
+    required this.category,
+    required this.publishedDate,
+    required this.viewCount,
+    required this.readingTimeMinutes,
+    this.isFeatured = false,
+    this.authorName,
+    this.authorAvatar,
+  });
+
+  /// Get formatted publication date (dd/MM/yyyy)
+  String get formattedDate {
+    return '${publishedDate.day.toString().padLeft(2, '0')}/'
+        '${publishedDate.month.toString().padLeft(2, '0')}/'
+        '${publishedDate.year}';
+  }
+
+  /// Get formatted view count (e.g., "2.3K")
+  String get formattedViewCount {
+    if (viewCount >= 1000) {
+      return '${(viewCount / 1000).toStringAsFixed(1)}K';
+    }
+    return viewCount.toString();
+  }
+
+  /// Get reading time display text
+  String get readingTimeText => '$readingTimeMinutes phút đọc';
+
+  /// Copy with method for immutability
+  NewsArticle copyWith({
+    String? id,
+    String? title,
+    String? excerpt,
+    String? content,
+    String? imageUrl,
+    NewsCategory? category,
+    DateTime? publishedDate,
+    int? viewCount,
+    int? readingTimeMinutes,
+    bool? isFeatured,
+    String? authorName,
+    String? authorAvatar,
+  }) {
+    return NewsArticle(
+      id: id ?? this.id,
+      title: title ?? this.title,
+      excerpt: excerpt ?? this.excerpt,
+      content: content ?? this.content,
+      imageUrl: imageUrl ?? this.imageUrl,
+      category: category ?? this.category,
+      publishedDate: publishedDate ?? this.publishedDate,
+      viewCount: viewCount ?? this.viewCount,
+      readingTimeMinutes: readingTimeMinutes ?? this.readingTimeMinutes,
+      isFeatured: isFeatured ?? this.isFeatured,
+      authorName: authorName ?? this.authorName,
+      authorAvatar: authorAvatar ?? this.authorAvatar,
+    );
+  }
+
+  /// Equality operator
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+
+    return other is NewsArticle &&
+        other.id == id &&
+        other.title == title &&
+        other.excerpt == excerpt &&
+        other.content == content &&
+        other.imageUrl == imageUrl &&
+        other.category == category &&
+        other.publishedDate == publishedDate &&
+        other.viewCount == viewCount &&
+        other.readingTimeMinutes == readingTimeMinutes &&
+        other.isFeatured == isFeatured &&
+        other.authorName == authorName &&
+        other.authorAvatar == authorAvatar;
+  }
+
+  /// Hash code
+  @override
+  int get hashCode {
+    return Object.hash(
+      id,
+      title,
+      excerpt,
+      content,
+      imageUrl,
+      category,
+      publishedDate,
+      viewCount,
+      readingTimeMinutes,
+      isFeatured,
+      authorName,
+      authorAvatar,
+    );
+  }
+
+  /// String representation
+  @override
+  String toString() {
+    return 'NewsArticle(id: $id, title: $title, category: $category, '
+        'publishedDate: $publishedDate, isFeatured: $isFeatured)';
+  }
+}
+
+/// News Category enum
+enum NewsCategory {
+  /// General news
+  news,
+
+  /// Professional/technical content
+  professional,
+
+  /// Project showcases
+  projects,
+
+  /// Events
+  events,
+
+  /// Promotions
+  promotions,
+}
+
+/// Extension for News Category display
+extension NewsCategoryX on NewsCategory {
+  String get displayName {
+    switch (this) {
+      case NewsCategory.news:
+        return 'Tin tức';
+      case NewsCategory.professional:
+        return 'Chuyên môn';
+      case NewsCategory.projects:
+        return 'Dự án';
+      case NewsCategory.events:
+        return 'Sự kiện';
+      case NewsCategory.promotions:
+        return 'Khuyến mãi';
+    }
+  }
+
+  String get filterName {
+    switch (this) {
+      case NewsCategory.news:
+        return 'news';
+      case NewsCategory.professional:
+        return 'professional';
+      case NewsCategory.projects:
+        return 'projects';
+      case NewsCategory.events:
+        return 'events';
+      case NewsCategory.promotions:
+        return 'promotions';
+    }
+  }
+}

lib/features/news/domain/repositories/news_repository.dart

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+/// Domain Repository Interface: News Repository
+///
+/// Defines the contract for news article data operations.
+/// This is an abstract interface following the Repository Pattern.
+library;
+
+import 'package:worker/features/news/domain/entities/news_article.dart';
+
+/// News Repository Interface
+///
+/// Provides methods to fetch and manage news articles.
+abstract class NewsRepository {
+  /// Get all news articles
+  Future<List<NewsArticle>> getAllArticles();
+
+  /// Get featured article
+  Future<NewsArticle?> getFeaturedArticle();
+
+  /// Get articles by category
+  Future<List<NewsArticle>> getArticlesByCategory(NewsCategory category);
+
+  /// Get a specific article by ID
+  Future<NewsArticle?> getArticleById(String articleId);
+
+  /// Refresh articles from server
+  Future<List<NewsArticle>> refreshArticles();
+}