Data not loading after using annimation - flutter

Question

I am making a chat app using flutter. It is loading data from firestore but when I am using annimation in the drawer the chat's aren't loading I don't know the reason if i comment out the animation in the chat screen it works and it works also if comment out if block which contain connection state.waiting without commenting annimation
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:my_flutter_app/chat/messages.dart';
import 'package:my_flutter_app/chat/new_message.dart';
class ChatScreen extends StatefulWidget {
const ChatScreen({Key? key}) : super(key: key);
#override
State<ChatScreen> createState() => _ChatScreenState();
}
class _ChatScreenState extends State<ChatScreen> with SingleTickerProviderStateMixin{
late AnimationController controller;
late Animation animation;
#override
void initState() {
super.initState();
controller=AnimationController(
duration: Duration(seconds: 2),
vsync: this);
animation=CurvedAnimation(parent: controller, curve: Curves.decelerate);
controller.forward();
animation.addStatusListener((status) {
if(status==AnimationStatus.completed){
controller.reverse(from: 1.0);
}else if(status==AnimationStatus.dismissed){
controller.forward();
}
});
controller.addListener(() {
setState(() {
animation.value;
});
});
}
#override
void dispose() {
super.dispose();
controller.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
drawer: Drawer(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Container(
margin: EdgeInsets.only(top: 50),
padding: EdgeInsets.all(15),
child: CircleAvatar(backgroundImage: AssetImage('assets/profile.png'),radius: 60),),
Container(
child: Image.asset('assets/welcome.png'),
height: animation.value*100,
),
InkWell(
onTap: (){
showCupertinoDialog(context: context, builder: (context)=>CupertinoAlertDialog(
title: Text('Alert'),
content: Text('Are you sure you want to logout?'),
actions: [
CupertinoDialogAction(child: Text('Yes'),onPressed: (){
FirebaseAuth.instance.signOut();
Navigator.pop(context);
},),
CupertinoDialogAction(child: Text('No'),onPressed: (){
Navigator.pop(context);
},)
],
));
//FirebaseAuth.instance.signOut();
},
child: ListTile(leading: Icon(Icons.logout,color: Colors.white),
title: Text('LOGOUT',style: TextStyle(color: Colors.white,fontWeight: FontWeight.bold),),
tileColor: Colors.red,),
)
],
),
),
appBar: AppBar(title: Text('Chats'),centerTitle: true,backgroundColor: Colors.green),
body: Container(
child: Column(
children: [
Expanded(child: Messages()),
NewMessage(),
],
),
),
);
}
}
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:my_flutter_app/chat/mesui.dart';
class Messages extends StatefulWidget {
const Messages({Key? key}) : super(key: key);
#override
State<Messages> createState() => _MessagesState();
}
class _MessagesState extends State<Messages> {
final auth=FirebaseAuth.instance;
User ?cuser;
#override
void initState() {
// TODO: implement initState
super.initState();
getCurrentUser();
}
void getCurrentUser(){
try {
final user = auth.currentUser;
if (user != null) {
cuser = user;
}
}
catch(e){
print(e);
}
}
#override
Widget build(BuildContext context) {
return StreamBuilder(stream: FirebaseFirestore.instance.collection('chat').orderBy('messaged_on',descending: true).snapshots(),
builder: (context,snaps) {
if(snaps.connectionState == ConnectionState.waiting){
return Center(
child: CircularProgressIndicator(),
);
}
final documents=snaps.data!.docs;
final nowperson=cuser!.email;
return ListView.builder(
reverse: true,
itemBuilder: (ctx,index){
final sender=documents[index]['email'];
bool isMe= sender==nowperson;
return Mesui(documents[index]['text'],isMe);
},
itemCount: documents.length,);
},
);
}
}