GH-1053 explode launch task into many small steps, each a Task

1 files changed, 71 insertions, 0 deletions

diff --git a/logic/launch/steps/CheckJava.cpp b/logic/launch/steps/CheckJava.cpp
new file mode 100644
index 00000000..bd4c4856
--- /dev/null
+++ b/logic/launch/steps/CheckJava.cpp
@@ -0,0 +1,71 @@
+/* Copyright 2013-2015 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 "CheckJava.h"
+#include <launch/LaunchTask.h>
+#include <QStandardPaths>
+
+void CheckJava::executeTask()
+{
+	auto instance = m_parent->instance();
+	auto javaPath = instance->settings()->get("JavaPath").toString();
+	emit logLine("Java path is:\n" + m_javaPath + "\n\n", MessageLevel::MultiMC);
+
+	auto realJavaPath = QStandardPaths::findExecutable(m_javaPath);
+	if (realJavaPath.isEmpty())
+	{
+		emit logLine(tr("The java binary \"%1\" couldn't be found. You may have to set up java "
+					"if Minecraft fails to launch.").arg(m_javaPath),
+				 MessageLevel::Warning);
+	}
+
+	QFileInfo javaInfo(realJavaPath);
+	qlonglong javaUnixTime = javaInfo.lastModified().toMSecsSinceEpoch();
+	auto storedUnixTime = instance->settings()->get("JavaTimestamp").toLongLong();
+	m_javaUnixTime = javaUnixTime;
+	// if they are not the same, check!
+	if(javaUnixTime != storedUnixTime)
+	{
+		m_JavaChecker = std::make_shared<JavaChecker>();
+		bool successful = false;
+		QString errorLog;
+		QString version;
+		emit logLine(tr("Checking Java version..."), MessageLevel::MultiMC);
+		connect(m_JavaChecker.get(), &JavaChecker::checkFinished, this, &CheckJava::checkJavaFinished);
+		m_JavaChecker->m_path = realJavaPath;
+		m_JavaChecker->performCheck();
+	}
+	emitSucceeded();
+}
+
+void CheckJava::checkJavaFinished(JavaCheckResult result)
+{
+	if(!result.valid)
+	{
+		// Error message displayed if java can't start
+		emit logLine(tr("Could not start java:"), MessageLevel::Error);
+		emit logLines(result.errorLog.split('\n'), MessageLevel::Error);
+		emit logLine("\nCheck your MultiMC Java settings.", MessageLevel::MultiMC);
+		emitFailed(tr("Could not start java!"));
+	}
+	else
+	{
+		auto instance = m_parent->instance();
+		emit logLine(tr("Java version is %1!\n").arg(result.javaVersion), MessageLevel::MultiMC);
+		instance->settings()->set("JavaVersion", result.javaVersion);
+		instance->settings()->set("JavaTimestamp", m_javaUnixTime);
+		emitSucceeded();
+	}
+}