Verify access tokens before launching Minecraft

Kind of an important thing to do... Heh...

logic/auth/ValidateTask.cpp

@@ -0,0 +1,66 @@
+
+/* Copyright 2013 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 <logic/auth/ValidateTask.h>
+
+#include <logic/auth/MojangAccount.h>
+
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonArray>
+#include <QVariant>
+#include <QDebug>
+
+#include "logger/QsLog.h"
+
+ValidateTask::ValidateTask(MojangAccountPtr account, QObject* parent) :
+	YggdrasilTask(account, parent)
+{
+}
+
+QJsonObject ValidateTask::getRequestContent() const
+{
+	QJsonObject req;
+	req.insert("accessToken", getMojangAccount()->accessToken());
+	return req;
+}
+
+bool ValidateTask::processResponse(QJsonObject responseData)
+{
+	// Assume that if processError wasn't called, then the request was successful.
+	emitSucceeded();
+	return true;
+}
+
+QString ValidateTask::getEndpoint() const
+{
+	return "validate";
+}
+
+QString ValidateTask::getStateMessage(const YggdrasilTask::State state) const
+{
+	switch (state)
+	{
+	case STATE_SENDING_REQUEST:
+		return tr("Validating Access Token: Sending request.");
+	case STATE_PROCESSING_RESPONSE:
+		return tr("Validating Access Token: Processing response.");
+	default:
+		return YggdrasilTask::getStateMessage(state);
+	}
+}
+
+