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// SPDX-License-Identifier: GPL-3.0-only AND Apache-2.0
// SPDX-FileCopyrightText: 2026 Project Tick
// SPDX-FileContributor: Project Tick Team
/*
* ProjT Launcher - Minecraft Launcher
* Copyright (C) 2026 Project Tick
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* === Upstream License Block (Do Not Modify) ==============================
*
* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ======================================================================== */
#include "MinecraftTarget.hpp"
#include <QRegularExpression>
#include <QStringList>
// Note: This parser intentionally mirrors Minecraft's address parsing behavior exactly,
// including its tolerance for malformed input. Invalid addresses resolve to unusable
// targets, which Minecraft handles at connection time. The isValid() method can be
// used by callers requiring validation.
MinecraftTarget MinecraftTarget::parse(const QString& fullAddress, bool useWorld)
{
// Validate input - empty or whitespace-only addresses are invalid
QString trimmed = fullAddress.trimmed();
if (trimmed.isEmpty())
{
return MinecraftTarget{}; // Return empty target for invalid input
}
if (useWorld)
{
MinecraftTarget target;
target.world = trimmed;
return target;
}
QStringList split = trimmed.split(":");
// The logic below replicates the exact logic minecraft uses for parsing server addresses.
// While the conversion is not lossless and eats errors, it ensures the same behavior
// within Minecraft and ProjT Launcher when entering server addresses.
if (trimmed.startsWith("["))
{
int bracket = trimmed.indexOf("]");
if (bracket > 0)
{
QString ipv6 = trimmed.mid(1, bracket - 1);
QString port = trimmed.mid(bracket + 1).trimmed();
if (port.startsWith(":") && !ipv6.isEmpty())
{
port = port.mid(1);
split = QStringList({ ipv6, port });
}
else
{
split = QStringList({ ipv6 });
}
}
}
if (split.size() > 2)
{
split = QStringList({ trimmed });
}
QString realAddress = split[0];
// Validate address is not empty after parsing
if (realAddress.isEmpty())
{
return MinecraftTarget{}; // Invalid address
}
quint16 realPort = 25565;
if (split.size() > 1)
{
bool ok;
uint portValue = split[1].toUInt(&ok);
// Validate port is in valid range (1-65535)
if (ok && portValue > 0 && portValue <= 65535)
{
realPort = static_cast<quint16>(portValue);
}
else
{
// Invalid port, use default
realPort = 25565;
}
}
return MinecraftTarget{ realAddress, realPort };
}
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