multi mention

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

lib/pages/dynamics_mention/controller.dart

@@ -1,6 +1,7 @@
 import 'package:PiliPlus/http/dynamics.dart';
 import 'package:PiliPlus/http/loading_state.dart';
 import 'package:PiliPlus/models_new/dynamic/dyn_mention/group.dart';
+import 'package:PiliPlus/models_new/dynamic/dyn_mention/item.dart';
 import 'package:PiliPlus/pages/common/common_list_controller.dart';
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
@@ -12,12 +13,26 @@ class DynMentionController
 
   final RxBool enableClear = false.obs;
 
+  final RxBool showBtn = false.obs;
+  Set<MentionItem>? mentionList;
+
+  void updateBtn() {
+    showBtn.value = mentionList?.isNotEmpty == true;
+  }
+
   @override
   void onInit() {
     super.onInit();
     queryData();
   }
 
+  @override
+  Future<void> onRefresh() {
+    mentionList?.clear();
+    showBtn.value = false;
+    return super.onRefresh();
+  }
+
   @override
   Future<LoadingState<List<MentionGroup>?>> customGetData() =>
       DynamicsHttp.dynMention(keyword: controller.text);
@@ -26,6 +41,17 @@ class DynMentionController
   void onClose() {
     focusNode.dispose();
     controller.dispose();
+    mentionList?.clear();
+    mentionList = null;
     super.onClose();
   }
+
+  void onCheck(bool? value, MentionItem item) {
+    if (value == true) {
+      (mentionList ??= <MentionItem>{}).add(item);
+    } else {
+      mentionList!.remove(item);
+    }
+    updateBtn();
+  }
 }