Envelope/mobile/lib/components/select_message_ttl.dart

import 'package:flutter/material.dart';

import '/components/custom_title_bar.dart';

const Map<String, String> messageExpiryValues = {
  'no_expiry': 'No Expiry',
  'fifteen_min': '15 Minutes',
  'thirty_min': '30 Minutes',
  'one_hour': '1 Hour',
  'three_hour': '3 Hours',
  'six_hour': '6 Hours',
  'twelve_day': '12 Hours',
  'one_day': '1 Day',
  'three_day': '3 Days',
};

class SelectMessageTTL extends StatefulWidget {
  const SelectMessageTTL({
    Key? key,
    required this.widgetTitle,
    required this.backCallback,
    this.currentSelected,
  }) : super(key: key);

  final String widgetTitle;
  final Future<void> Function(String messageExpiry) backCallback;
  final String? currentSelected;

  @override
  _SelectMessageTTLState createState() => _SelectMessageTTLState();
}

class _SelectMessageTTLState extends State<SelectMessageTTL> {
  String selectedExpiry = 'no_expiry';

  @override
  void initState() {
    selectedExpiry = widget.currentSelected ?? 'no_expiry';
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: CustomTitleBar(
        title: Text(
          widget.widgetTitle,
          style: const TextStyle(
            fontSize: 28,
            fontWeight: FontWeight.bold
          )
        ),
        showBack: true,
        backgroundColor: Colors.transparent,
        beforeBack: () async {
          widget.backCallback(selectedExpiry);
        },
      ),
      body: Padding(
        padding: const EdgeInsets.only(top: 30),
        child: _list(),
      ),
    );
  }

  Widget _list() {
    return ListView.builder(
      itemCount: messageExpiryValues.length,
      shrinkWrap: true,
      itemBuilder: (context, i) {
        String key = messageExpiryValues.keys.elementAt(i);

        return GestureDetector(
          behavior: HitTestBehavior.opaque,
          onTap: () {
            setState(() {
              selectedExpiry = key;
            });
          },

          child: Padding(
            padding: const EdgeInsets.only(left: 30, right: 20, top: 8, bottom: 8),
            child: Row(
              children: [
                selectedExpiry == key ?
                  const Icon(Icons.check) :
                  const SizedBox(width: 24),
                const SizedBox(width: 16),
                Expanded(
                 child: Align(
                   alignment: Alignment.centerLeft,
                   child: Text(
                     messageExpiryValues[key] ?? '',
                     style: const TextStyle(
                       fontSize: 20,
                       fontWeight: FontWeight.normal,
                     ),
                   ),
                 )
                )
              ],
            )
          )
        );
      },
    );
  }
}