opt: pages

Closes #644

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/common/common_page.dart

@@ -0,0 +1,49 @@
+import 'dart:async';
+
+import 'package:PiliPlus/pages/common/common_controller.dart';
+import 'package:PiliPlus/pages/home/controller.dart';
+import 'package:PiliPlus/pages/main/controller.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+import 'package:get/get.dart';
+
+abstract class CommonPage extends StatefulWidget {
+  const CommonPage({super.key});
+}
+
+abstract class CommonPageState<T extends CommonPage, R extends CommonController>
+    extends State<T> {
+  R get controller;
+  StreamController<bool>? mainStream;
+  StreamController<bool>? searchBarStream;
+
+  @override
+  void initState() {
+    super.initState();
+    try {
+      mainStream = Get.find<MainController>().bottomBarStream;
+      searchBarStream = Get.find<HomeController>().searchBarStream;
+    } catch (_) {}
+    if (mainStream != null || searchBarStream != null) {
+      controller.scrollController.addListener(listener);
+    }
+  }
+
+  void listener() {
+    final ScrollDirection direction =
+        controller.scrollController.position.userScrollDirection;
+    if (direction == ScrollDirection.forward) {
+      mainStream?.add(true);
+      searchBarStream?.add(true);
+    } else if (direction == ScrollDirection.reverse) {
+      mainStream?.add(false);
+      searchBarStream?.add(false);
+    }
+  }
+
+  @override
+  void dispose() {
+    controller.scrollController.removeListener(listener);
+    super.dispose();
+  }
+}