Old printJson (using string insertion - slow)

printJson-old.cpp

QString printJSON(const QJsonValue& jsonValue, int maxLength, int indentLevel) {
	static const QString indent{QStringLiteral("  ")};
	static const QString cn{QStringLiteral(",\n")};
	QString whiteSpace(indent.repeated(indentLevel));

	switch(jsonValue.type()) {
	case QJsonValue::Object:
	{
		QStringList values;
		QJsonObject o = jsonValue.toObject();
		for(const QString& key : o.keys()) {
			values.append(QStringLiteral("%1  \"%2\":%3").arg(whiteSpace, key, printJSON(o.value(key), maxLength, indentLevel + 1)));
		}
		return QStringLiteral("{\n%1\n%2}").arg(values.join(cn), whiteSpace);
	}

	case QJsonValue::Array:
	{
		QStringList values;
		for(const QJsonValue& v : jsonValue.toArray()) {
			values.append(whiteSpace + indent + printJSON(v, maxLength, indentLevel + 1));
		}
		return QStringLiteral("[\n%1\n%2]").arg(values.join(cn), whiteSpace);
	}

	case QJsonValue::String:
	{
		QString s = jsonValue.toVariant().toString();
		return (s.length() > maxLength) ? QStringLiteral("\"(%1 chars)\"").arg(s.length()) : QStringLiteral("\"%1\"").arg(s);
	}

	case QJsonValue::Double:
	case QJsonValue::Bool:
		return jsonValue.toVariant().toString();
	case QJsonValue::Null:
	case QJsonValue::Undefined:
		return QStringLiteral("null");
	}
	return QString();
}