fluffychat/lib/views/sign_up.dart

import 'package:adaptive_page_layout/adaptive_page_layout.dart';
import 'package:famedlysdk/famedlysdk.dart';
import 'package:file_picker_cross/file_picker_cross.dart';
import 'package:fluffychat/views/widgets/fluffy_banner.dart';

import 'package:fluffychat/views/widgets/matrix.dart';
import 'package:fluffychat/views/widgets/one_page_card.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';

class SignUp extends StatefulWidget {
  @override
  _SignUpState createState() => _SignUpState();
}

class _SignUpState extends State<SignUp> {
  final TextEditingController usernameController = TextEditingController();
  String usernameError;
  bool loading = false;
  MatrixFile avatar;

  void setAvatarAction() async {
    var file =
        await FilePickerCross.importFromStorage(type: FileTypeCross.image);
    if (file != null) {
      setState(
        () => avatar = MatrixFile(
          bytes: file.toUint8List(),
          name: file.fileName,
        ),
      );
    }
  }

  void signUpAction(BuildContext context) async {
    var matrix = Matrix.of(context);
    if (usernameController.text.isEmpty) {
      setState(() => usernameError = L10n.of(context).pleaseChooseAUsername);
    } else {
      setState(() => usernameError = null);
    }

    if (usernameController.text.isEmpty) {
      return;
    }
    setState(() => loading = true);

    final preferredUsername =
        usernameController.text.toLowerCase().trim().replaceAll(' ', '-');

    try {
      await matrix.client.usernameAvailable(preferredUsername);
    } on MatrixException catch (exception) {
      setState(() => usernameError = exception.errorMessage);
      return setState(() => loading = false);
    } catch (exception) {
      setState(() => usernameError = exception.toString());
      return setState(() => loading = false);
    }
    setState(() => loading = false);
    await AdaptivePageLayout.of(context).pushNamed(
      '/signup/password/${Uri.encodeComponent(preferredUsername)}/${Uri.encodeComponent(usernameController.text)}',
      arguments: avatar,
    );
  }

  @override
  Widget build(BuildContext context) {
    return OnePageCard(
      child: Scaffold(
        appBar: AppBar(
          elevation: 0,
          leading: loading ? Container() : BackButton(),
          title: Text(
            Matrix.of(context)
                .client
                .homeserver
                .toString()
                .replaceFirst('https://', ''),
          ),
        ),
        body: ListView(children: <Widget>[
          Hero(
            tag: 'loginBanner',
            child: FluffyBanner(),
          ),
          SizedBox(height: 16),
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 12.0),
            child: TextField(
              readOnly: loading,
              autocorrect: false,
              controller: usernameController,
              onSubmitted: (s) => signUpAction(context),
              autofillHints: loading ? null : [AutofillHints.newUsername],
              decoration: InputDecoration(
                prefixIcon: Icon(Icons.account_circle_outlined),
                hintText: L10n.of(context).username,
                errorText: usernameError,
                labelText: L10n.of(context).chooseAUsername,
              ),
            ),
          ),
          SizedBox(height: 8),
          ListTile(
            leading: CircleAvatar(
              backgroundImage:
                  avatar == null ? null : MemoryImage(avatar.bytes),
              backgroundColor: avatar == null
                  ? Theme.of(context).brightness == Brightness.dark
                      ? Color(0xff121212)
                      : Colors.white
                  : Theme.of(context).secondaryHeaderColor,
              child: avatar == null
                  ? Icon(Icons.camera_alt_outlined,
                      color: Theme.of(context).primaryColor)
                  : null,
            ),
            trailing: avatar == null
                ? null
                : Icon(
                    Icons.close,
                    color: Colors.red,
                  ),
            title: Text(avatar == null
                ? L10n.of(context).setAProfilePicture
                : L10n.of(context).discardPicture),
            onTap: avatar == null
                ? setAvatarAction
                : () => setState(() => avatar = null),
          ),
          SizedBox(height: 16),
          Hero(
            tag: 'loginButton',
            child: Padding(
              padding: EdgeInsets.symmetric(horizontal: 12),
              child: ElevatedButton(
                onPressed: loading ? null : () => signUpAction(context),
                child: loading
                    ? LinearProgressIndicator()
                    : Text(
                        L10n.of(context).signUp.toUpperCase(),
                        style: TextStyle(color: Colors.white, fontSize: 16),
                      ),
              ),
            ),
          ),
          Center(
            child: TextButton(
              onPressed: () =>
                  AdaptivePageLayout.of(context).pushNamed('/login'),
              child: Text(
                L10n.of(context).alreadyHaveAnAccount,
                style: TextStyle(
                  decoration: TextDecoration.underline,
                  color: Colors.blue,
                  fontSize: 16,
                ),
              ),
            ),
          ),
        ]),
      ),
    );
  }
}