import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:selfprivacy/config/brand_colors.dart';
import 'package:url_launcher/url_launcher.dart';

class BrandSpanButton extends TextSpan {
  BrandSpanButton({
    @required String text,
    @required VoidCallback onTap,
    TextStyle style,
  })  : assert(text != null),
        assert(onTap != null),
        super(
          recognizer: TapGestureRecognizer()..onTap = onTap,
          text: text,
          style: (style ?? TextStyle()).copyWith(color: BrandColors.blue),
        );

  static link({
    @required String text,
    String urlString,
    TextStyle style,
  }) =>
      BrandSpanButton(
        text: text,
        style: style,
        onTap: () => _launchURL(urlString ?? text),
      );

  static _launchURL(String link) async {
    if (await canLaunch(link)) {
      await launch(link);
    } else {
      throw 'Could not launch $link';
    }
  }
}