Method guessScheme

app/src/main/java/eu/faircode/email/UriHelper.java:216–239

(@NonNull Uri uri)

    }

    static @NonNull
    Uri guessScheme(@NonNull Uri uri) {
        if (uri.getScheme() != null)
            return uri;

        String url = uri.toString();
        if (Helper.EMAIL_ADDRESS.matcher(url).matches())
            return Uri.parse("mailto:" + url);
        else if (PatternsCompat.IP_ADDRESS.matcher(url).matches())
            return Uri.parse("https://" + url);
        else if (android.util.Patterns.PHONE.matcher(url).matches())
            // Patterns.PHONE (\+[0-9]+[\- \.]*)?(\([0-9]+\)[\- \.]*)?([0-9][0-9\- \.]+[0-9])
            // PhoneNumberUtils.isGlobalPhoneNumber() [\+]?[0-9.-]+
            return Uri.parse("tel:" + url);
        else {
            Uri g = Uri.parse(URLUtil.guessUrl(url));
            String scheme = g.getScheme();
            if (scheme == null)
                return uri;
            else if ("http".equals(scheme))
                scheme = "https";
            return Uri.parse(scheme + "://" + url);
        }
    }

    static int getSuffixCount(Context context) {
        ensureSuffixList(context);