Envelope/mobile/lib/views/main/conversation_list.dart

import 'package:flutter/material.dart';
import '/models/conversations.dart';
import '/views/main/conversation_list_item.dart';

class ConversationList extends StatefulWidget {
  final List<Conversation> conversations;
  const ConversationList({
    Key? key,
    required this.conversations,
  }) : super(key: key);

  @override
  State<ConversationList> createState() => _ConversationListState();
}

class _ConversationListState extends State<ConversationList> {
  List<Conversation> conversations = [];

  @override
  void initState() {
    super.initState();
    conversations.addAll(widget.conversations);
    setState(() {});
  }

  void filterSearchResults(String query) {
    List<Conversation> dummySearchList = [];
    dummySearchList.addAll(widget.conversations);

    if(query.isNotEmpty) {
      List<Conversation> dummyListData = [];
      dummySearchList.forEach((item) {
        if (item.name.toLowerCase().contains(query)) {
          dummyListData.add(item);
        }
      });
      setState(() {
        conversations.clear();
        conversations.addAll(dummyListData);
      });
      return;
    }

    setState(() {
      conversations.clear();
      conversations.addAll(widget.conversations);
    });
  }

  Widget list() {
    if (conversations.isEmpty) {
      return const Center(
          child: Text('No Conversations'),
      );
    }

    return ListView.builder(
        itemCount: conversations.length,
        shrinkWrap: true,
        padding: const EdgeInsets.only(top: 16),
        physics: const NeverScrollableScrollPhysics(),
        itemBuilder: (context, i) {
          return ConversationListItem(
              conversation: conversations[i],
          );
        },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: SingleChildScrollView(
            physics: const BouncingScrollPhysics(),
            child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: <Widget>[
                  SafeArea(
                      child: Padding(
                          padding: const EdgeInsets.only(left: 16,right: 16,top: 10),
                          child: Row(
                              mainAxisAlignment: MainAxisAlignment.spaceBetween,
                              children: const <Widget>[
                                Text("Conversations",style: TextStyle(fontSize: 32,fontWeight: FontWeight.bold),),
                              ],
                          ),
                      ),
                  ),
                  Padding(
                      padding: const EdgeInsets.only(top: 16,left: 16,right: 16),
                      child: TextField(
                          decoration: const InputDecoration(
                              hintText: "Search...",
                              prefixIcon: Icon(
                                  Icons.search,
                                  size: 20
                              ),
                            ),
                          onChanged: (value) => filterSearchResults(value.toLowerCase())
                      ),
                  ),
                  Padding(
                      padding: const EdgeInsets.only(top: 16,left: 16,right: 16),
                      child: list(),
                  ),
              ],
          ),
      ),
    );
  }
}