Renew the updater branch

Now with some actual consensus on what the updater will do!

mmc_updater/src/UpdateInstaller.h

@@ -0,0 +1,70 @@
+#pragma once
+
+#include "Platform.h"
+#include "FileUtils.h"
+#include "UpdateScript.h"
+
+#include <list>
+#include <string>
+#include <map>
+
+class UpdateObserver;
+
+/** Central class responsible for installing updates,
+  * launching an elevated copy of the updater if required
+  * and restarting the main application once the update
+  * is installed.
+  */
+class UpdateInstaller
+{
+	public:
+		enum Mode
+		{
+			Setup,
+			Main
+		};
+
+		UpdateInstaller();
+		void setInstallDir(const std::string& path);
+		void setPackageDir(const std::string& path);
+		void setBackupDir(const std::string& path);
+		void setMode(Mode mode);
+		void setScript(UpdateScript* script);
+		void setWaitPid(PLATFORM_PID pid);
+		void setForceElevated(bool elevated);
+		void setAutoClose(bool autoClose);
+
+		void setObserver(UpdateObserver* observer);
+
+		void run() throw ();
+
+		void restartMainApp();
+
+	private:
+		void cleanup();
+		void revert();
+		void removeBackups();
+		bool checkAccess();
+
+		void installFiles();
+		void uninstallFiles();
+		void installFile(const UpdateScriptFile& file);
+		void backupFile(const std::string& path);
+		void reportError(const std::string& error);
+		void postInstallUpdate();
+
+		std::list<std::string> updaterArgs() const;
+		std::string friendlyErrorForError(const FileUtils::IOException& ex) const;
+
+		Mode m_mode;
+		std::string m_installDir;
+		std::string m_packageDir;
+		std::string m_backupDir;
+		PLATFORM_PID m_waitPid;
+		UpdateScript* m_script;
+		UpdateObserver* m_observer;
+		std::map<std::string,std::string> m_backups;
+		bool m_forceElevated;
+		bool m_autoClose;
+};
+