add ScrollMixin and isLoadingMore to controller status

@@ -152,51 +152,36 @@ class RxStatus {
   final bool isError;
   final bool isSuccess;
   final bool isEmpty;
+  final bool isLoadingMore;
   final String errorMessage;
 
   RxStatus._({
-    this.isEmpty,
-    this.isLoading,
-    this.isError,
-    this.isSuccess,
+    this.isEmpty = false,
+    this.isLoading = false,
+    this.isError = false,
+    this.isSuccess = false,
     this.errorMessage,
+    this.isLoadingMore = false,
   });
 
   factory RxStatus.loading() {
-    return RxStatus._(
-      isLoading: true,
-      isError: false,
-      isSuccess: false,
-      isEmpty: false,
-    );
+    return RxStatus._(isLoading: true);
+  }
+
+  factory RxStatus.loadingMore() {
+    return RxStatus._(isSuccess: true, isLoadingMore: true);
   }
 
   factory RxStatus.success() {
-    return RxStatus._(
-      isLoading: false,
-      isError: false,
-      isSuccess: true,
-      isEmpty: false,
-    );
+    return RxStatus._(isSuccess: true);
   }
 
   factory RxStatus.error([String message]) {
-    return RxStatus._(
-      isLoading: false,
-      isError: true,
-      isSuccess: false,
-      isEmpty: false,
-      errorMessage: message,
-    );
+    return RxStatus._(isError: true, errorMessage: message);
   }
 
   factory RxStatus.empty() {
-    return RxStatus._(
-      isLoading: false,
-      isError: false,
-      isSuccess: false,
-      isEmpty: true,
-    );
+    return RxStatus._(isEmpty: true);
   }
 }
 

 // ignore: prefer_mixin
 import 'package:flutter/widgets.dart';
+import '../../../instance_manager.dart';
 
 import '../rx_flutter/rx_disposable.dart';
 import '../rx_flutter/rx_notifier.dart';
@@ -26,6 +27,50 @@ abstract class GetxController extends DisposableInterface with ListNotifier {
   }
 }
 
+mixin ScrollMixin on GetLifeCycleBase {
+  final ScrollController scroll = ScrollController();
+
+  @override
+  void onInit() {
+    super.onInit();
+    scroll.addListener(_listener);
+  }
+
+  bool _canFetchBottom = true;
+
+  bool _canFetchTop = true;
+
+  void _listener() {
+    if (scroll.position.atEdge) {
+      _checkIfCanLoadMore();
+    }
+  }
+
+  Future<void> _checkIfCanLoadMore() async {
+    if (scroll.position.pixels == 0) {
+      if (!_canFetchTop) return;
+      _canFetchTop = false;
+      await onTopScroll();
+      _canFetchTop = true;
+    } else {
+      if (!_canFetchBottom) return;
+      _canFetchBottom = false;
+      await onEndScroll();
+      _canFetchBottom = true;
+    }
+  }
+
+  Future<void> onEndScroll();
+
+  Future<void> onTopScroll();
+
+  @override
+  void onClose() {
+    scroll.removeListener(_listener);
+    super.onClose();
+  }
+}
+
 abstract class RxController extends DisposableInterface {}
 
 abstract class SuperController<T> extends FullLifeCycleController