comunicmobile/lib/ui/dialogs/url_dialog.dart

import 'package:comunic/utils/input_utils.dart';
import 'package:comunic/utils/intl_utils.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

/// Ask the user to enter an URL
///
/// @author Pierre Hubert

/// Ask the user to enter an URL
Future<String> showInputURLDialog({
  @required BuildContext context,
  @required String title,
  String initialURL,
}) async {
  return await showDialog(
    context: context,
    builder: (c) => _InputURLDialog(
      title: title,
      initialURL: initialURL,
    ),
  );
}

class _InputURLDialog extends StatefulWidget {
  final String title;
  final String initialURL;

  const _InputURLDialog({
    Key key,
    @required this.title,
    @required this.initialURL,
  })  : assert(title != null),
        super(key: key);

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

class __InputURLDialogState extends State<_InputURLDialog> {
  TextEditingController _controller;

  bool get _isValid =>
      _controller.text.isNotEmpty && validateUrl(_controller.text);

  @override
  void initState() {
    super.initState();
    _controller = new TextEditingController(text: widget.initialURL);
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: Text(widget.title),
      content: TextField(
        controller: _controller,
        onChanged: (s) => setState(() {}),
        decoration: InputDecoration(
          icon: Icon(Icons.link),
          alignLabelWithHint: true,
          labelText: "http://...",
          errorText: _controller.text.isNotEmpty && !_isValid
              ? tr("Invalid URL!")
              : null,
        ),
      ),
      actions: <Widget>[
        // Cancel
        MaterialButton(
          child: Text(tr("Cancel").toUpperCase()),
          onPressed: () => Navigator.of(context).pop(),
          textColor: Colors.red,
        ),

        // Confirm
        MaterialButton(
          child: Text(tr("Confirm").toUpperCase()),
          onPressed: _isValid
              ? () => Navigator.of(context).pop(_controller.text)
              : null,
        ),
      ],
    );
  }
}