ESSE/lib/widgets/show_contact.dart

import 'package:flutter/material.dart';

import 'package:provider/provider.dart';
import 'package:esse/l10n/localizations.dart';
import 'package:esse/apps/chat/models.dart' show Friend;
import 'package:esse/rpc.dart';

class ContactList extends StatefulWidget {
  final Function callback;
  final bool multiple;
  final List<String> filters;
  final bool online;
  const ContactList({Key? key,
      required this.callback,
      required this.multiple,
      required this.filters,
      required this.online
  }) : super(key: key);

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

class _ContactListState extends State<ContactList> {
  List<bool> _checks = [];
  List<Friend> _friends = [];

  @override
  initState() {
    super.initState();
    _loadFriends();
  }

  _loadFriends() async {
    this._friends.clear();
    final res = await httpPost('chat-friend-list', [widget.online]);
    if (res.isOk) {
      if (widget.online) {
        List<Friend> onlines = [];
        List<Friend> offlines = [];
        res.params.forEach((params) {
            final friend = Friend.fromList(params);
            if (!widget.filters.contains(friend.pid)) {
              if (friend.online) {
                onlines.add(friend);
              } else {
                offlines.add(friend);
              }
            }
        });
        this._friends = onlines + offlines;
      } else {
        res.params.forEach((params) {
            final friend = Friend.fromList(params);
            if (!widget.filters.contains(friend.pid)) {
              this._friends.add(friend);
            }
        });
      }
      _checks = List<bool>.generate(_friends.length, (_) => false);
      setState(() {});
    } else {
      print(res.error);
    }
  }

  Widget _friend(int i, Friend friend) {
    final text = widget.online && !friend.online
    ? Text(friend.name, style: TextStyle(color: Colors.grey))
    : Text(friend.name);
    return Container(
      height: 55.0,
      child: widget.multiple
      ? ListTile(
        leading: friend.showAvatar(needOnline: widget.online),
        title: text,
        trailing: widget.online && !friend.online ? null : Checkbox(
          value: _checks[i],
          onChanged: (value) => setState(() => _checks[i] = value!)))
      : ListTile(
        onTap: widget.online && !friend.online ? null : () {
          Navigator.pop(context);
          widget.callback(friend.id);
        },
        leading: friend.showAvatar(),
        title: text,
    ));
  }

  @override
  Widget build(BuildContext context) {
    final color = Theme.of(context).colorScheme;
    final lang = AppLocalizations.of(context);

    double maxHeight = (MediaQuery.of(context).size.height - 400);
    if (maxHeight < 100.0) {
      maxHeight = 100.0;
    }

    return Column(children: [
      Container(
        height: 40.0,
        decoration: BoxDecoration(
            color: color.surface, borderRadius: BorderRadius.circular(10.0)),
        child: TextField(
          autofocus: false,
          textInputAction: TextInputAction.search,
          textAlignVertical: TextAlignVertical.center,
          style: TextStyle(fontSize: 14.0),
          onSubmitted: (value) {
            //toast(context, 'WIP...');
          },
          decoration: InputDecoration(
            hintText: lang.search,
            hintStyle: TextStyle(color: color.onPrimary.withOpacity(0.5)),
            border: InputBorder.none,
            contentPadding:
                EdgeInsets.only(left: 15.0, right: 15.0, bottom: 15.0),
          ),
        ),
      ),
      const SizedBox(height: 16.0),
      Container(
          height: maxHeight,
          child: SingleChildScrollView(
              child: Column(
                  children: List<Widget>.generate(
                    _friends.length, (i) => _friend(i, _friends[i]))))),
      const SizedBox(height: 10.0),
      const Divider(height: 1.0, color: Color(0x40ADB0BB)),
      const SizedBox(height: 10.0),
      if (widget.multiple)
        Row(mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: [
          TextButton(
            child: Text(lang.cancel, style: TextStyle(color: color.onSurface)),
            onPressed: () => Navigator.pop(context),
          ),
          TextButton(
            child: Text(lang.ok),
            onPressed: () {
              Navigator.pop(context);
              List<int> ids = [];
              _friends.asMap().forEach((i, value) {
                if (_checks[i]) {
                  ids.add(value.id);
                }
              });
              widget.callback(ids);
            },
          ),
        ])
    ]);
  }
}