feat: add ContentManagementState

- Define content management state
- Add status, data, and cursors
- Implement copyWith method

Author: fulleni

lib/content_management/bloc/content_management_state.dart

@@ -0,0 +1,133 @@
+part of 'content_management_bloc.dart';
+
+
+/// Represents the status of content loading and operations.
+enum ContentManagementStatus {
+  /// The operation is in its initial state.
+  initial,
+
+  /// Data is currently being loaded or an operation is in progress.
+  loading,
+
+  /// Data has been successfully loaded or an operation completed.
+  success,
+
+  /// An error occurred during data loading or an operation.
+  failure,
+}
+
+/// Defines the state for the content management feature.
+class ContentManagementState extends Equatable {
+  /// {@macro content_management_state}
+  const ContentManagementState({
+    this.activeTab = ContentManagementTab.headlines,
+    this.headlinesStatus = ContentManagementStatus.initial,
+    this.headlines = const [],
+    this.headlinesCursor,
+    this.headlinesHasMore = false,
+    this.categoriesStatus = ContentManagementStatus.initial,
+    this.categories = const [],
+    this.categoriesCursor,
+    this.categoriesHasMore = false,
+    this.sourcesStatus = ContentManagementStatus.initial,
+    this.sources = const [],
+    this.sourcesCursor,
+    this.sourcesHasMore = false,
+    this.errorMessage,
+  });
+
+  /// The currently active tab in the content management section.
+  final ContentManagementTab activeTab;
+
+  /// Status of headline data operations.
+  final ContentManagementStatus headlinesStatus;
+
+  /// List of headlines.
+  final List<Headline> headlines;
+
+  /// Cursor for headline pagination.
+  final String? headlinesCursor;
+
+  /// Indicates if there are more headlines to load.
+  final bool headlinesHasMore;
+
+  /// Status of category data operations.
+  final ContentManagementStatus categoriesStatus;
+
+  /// List of categories.
+  final List<Category> categories;
+
+  /// Cursor for category pagination.
+  final String? categoriesCursor;
+
+  /// Indicates if there are more categories to load.
+  final bool categoriesHasMore;
+
+  /// Status of source data operations.
+  final ContentManagementStatus sourcesStatus;
+
+  /// List of sources.
+  final List<Source> sources;
+
+  /// Cursor for source pagination.
+  final String? sourcesCursor;
+
+  /// Indicates if there are more sources to load.
+  final bool sourcesHasMore;
+
+  /// Error message if an operation fails.
+  final String? errorMessage;
+
+  /// Creates a copy of this [ContentManagementState] with updated values.
+  ContentManagementState copyWith({
+    ContentManagementTab? activeTab,
+    ContentManagementStatus? headlinesStatus,
+    List<Headline>? headlines,
+    String? headlinesCursor,
+    bool? headlinesHasMore,
+    ContentManagementStatus? categoriesStatus,
+    List<Category>? categories,
+    String? categoriesCursor,
+    bool? categoriesHasMore,
+    ContentManagementStatus? sourcesStatus,
+    List<Source>? sources,
+    String? sourcesCursor,
+    bool? sourcesHasMore,
+    String? errorMessage,
+  }) {
+    return ContentManagementState(
+      activeTab: activeTab ?? this.activeTab,
+      headlinesStatus: headlinesStatus ?? this.headlinesStatus,
+      headlines: headlines ?? this.headlines,
+      headlinesCursor: headlinesCursor ?? this.headlinesCursor,
+      headlinesHasMore: headlinesHasMore ?? this.headlinesHasMore,
+      categoriesStatus: categoriesStatus ?? this.categoriesStatus,
+      categories: categories ?? this.categories,
+      categoriesCursor: categoriesCursor ?? this.categoriesCursor,
+      categoriesHasMore: categoriesHasMore ?? this.categoriesHasMore,
+      sourcesStatus: sourcesStatus ?? this.sourcesStatus,
+      sources: sources ?? this.sources,
+      sourcesCursor: sourcesCursor ?? this.sourcesCursor,
+      sourcesHasMore: sourcesHasMore ?? this.sourcesHasMore,
+      errorMessage: errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        activeTab,
+        headlinesStatus,
+        headlines,
+        headlinesCursor,
+        headlinesHasMore,
+        categoriesStatus,
+        categories,
+        categoriesCursor,
+        categoriesHasMore,
+        sourcesStatus,
+        sources,
+        sourcesCursor,
+        sourcesHasMore,
+        errorMessage,
+      ];
+}