Added search bar on all pages

lib/features/document_search/cubit/document_search_cubit.dart

@@ -0,0 +1,68 @@
+import 'package:collection/collection.dart';
+import 'package:hydrated_bloc/hydrated_bloc.dart';
+import 'package:paperless_api/paperless_api.dart';
+import 'package:paperless_mobile/features/document_search/cubit/document_search_state.dart';
+import 'package:paperless_mobile/features/paged_document_view/paged_documents_mixin.dart';
+
+class DocumentSearchCubit extends HydratedCubit<DocumentSearchState>
+    with PagedDocumentsMixin {
+  @override
+  final PaperlessDocumentsApi api;
+  DocumentSearchCubit(this.api) : super(const DocumentSearchState());
+
+  Future<void> search(String query) async {
+    emit(state.copyWith(
+      isLoading: true,
+      suggestions: [],
+      view: SearchView.results,
+    ));
+    final searchFilter = DocumentFilter(
+      query: TextQuery.titleAndContent(query),
+    );
+
+    await updateFilter(filter: searchFilter);
+    emit(
+      state.copyWith(
+        searchHistory: [
+          query,
+          ...state.searchHistory
+              .whereNot((previousQuery) => previousQuery == query)
+        ],
+      ),
+    );
+  }
+
+  Future<void> suggest(String query) async {
+    emit(
+      state.copyWith(
+        isLoading: true,
+        view: SearchView.suggestions,
+        value: [],
+        suggestions: [],
+      ),
+    );
+    final suggestions = await api.autocomplete(query);
+    emit(state.copyWith(
+      suggestions: suggestions,
+      isLoading: false,
+    ));
+  }
+
+  void reset() {
+    emit(state.copyWith(
+      view: SearchView.suggestions,
+      suggestions: [],
+      isLoading: false,
+    ));
+  }
+
+  @override
+  DocumentSearchState? fromJson(Map<String, dynamic> json) {
+    return DocumentSearchState.fromJson(json);
+  }
+
+  @override
+  Map<String, dynamic>? toJson(DocumentSearchState state) {
+    return state.toJson();
+  }
+}