/*

* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#ifndef FEATMGRSERVER_H

#define FEATMGRSERVER_H

//  INCLUDES

#include <e32svr.h>

#include <featmgr/featurecmn.h>

#include <babackup.h>

#include "featmgrclientserver.h"

#include <featmgr/featureinfoplugin.h>

#include "featmgrtimer.h"

#include "featmgrfeatureregistry.h"

#include "burstate.h"

// FORWARD DECLARATIONS

class CFeatMgrPluginHandler;

class CFeatMgrFeatureRegistry;

enum TFeatureSupport

    {

    EFeatureSupportDisable = EFalse,

    EFeatureSupportEnable = ETrue,

    EFeatureSupportUntouch = 2

    };

// CLASS DECLARATIONS

#ifdef EXTENDED_FEATURE_MANAGER_TEST

/**

 Auto shutdown class (standard pattern) for testing purposes 

*/

class CShutdown : public CTimer

	{

	enum TMemScanShutdown

	    {

	    EMemScanServShutdownDelay=0x200000

	    };

public:

	inline CShutdown();

	inline void ConstructL();

	inline void Start();

private:

	void RunL();

	};

#endif // EXTENDED_FEATURE_MANAGER_TEST

/**

  Feature Manager server implementation 

*/

NONSHARABLE_CLASS(CFeatMgrServer) : 

    public CPolicyServer,

    public MFeatMgrTimerCallback,

    public MFeatMgrRegistryObserver,

    private MBackupOperationObserver, 

    private MBackupObserver    

    {

    public:  // Constructors and destructor

        /**

         Creates a new server. Newly created instance is left in the cleanup stack.

         @param aPriority Priority of the server.

         @return A pointer to the created object.

        */

        static CFeatMgrServer* NewLC( const TInt aPriority );

        /**

         Destructor.

        */

        virtual ~CFeatMgrServer();

    public: // New functions      

        /**

         Called by plugin handler to inform feature info to server.

        */ 

        void FeatureInfoL( RArray<FeatureInfoCommand::TFeature>& aFeatureList, 

                           CFeatMgrPluginHandler* aPluginHandler );

        /**

         Called by plugin handler to inform feature info to server.

        */ 

        void FeatureInfoL( RFeatureArray& aFeatureList, CFeatMgrPluginHandler* aPluginHandler );

        /**

         Returns ETrue if all plugins are ready and 

         Feature info received. 

         Else returns EFalse.

         @return feature support status

        */

        TBool PluginsReady() const;

#ifdef EXTENDED_FEATURE_MANAGER_TEST

        /**

         Called by session to indicate addition of session.

        */ 

        void AddSession();

        /**

         Called by session to indicate end of session.

        */ 

        void DropSession();

#endif // EXTENDED_FEATURE_MANAGER_TEST

    public: // Functions from base classes

    	// From MFeatMgrTimerCallback    	

    	virtual void TimerFired();

        // From MFeatMgrRegistryObserver    	

    	virtual void HandleFeatureChange( TFeatureServerEntry& aFeature, TFeatureChangeType aType );

       	/**

		Function from MBackupOperationObserver in response to a change in the state of the backup and

		restore operation(s). This function is called to notify the Feature Manager that a backup and 

		restore operation is in progress. However, this is not the whole story, and notification using 

		the callback ChangeLockFileL() is also used.

		@param			aBackupOperationAttributes The current state of the backup operation. Made up of 

		                MBackupObserver::TFileLockFlags and TOperationType types.

		@see			MBackupObserver::TFileLockFlags 

		@see			TOperationType.

	    */

        void HandleBackupOperationEventL(const TBackupOperationAttributes& aBackupOperationAttributes);

       	/**

		 * Function from MBackupObserver in response to a change in the state of the file to be subject to

		 * the BUR operation. This function is called to notify the Feature Manager that a filelock has 

		 * changed.

		 * @param aFileName name of the file whose status has changed.

		 * @param	aFlags the lock status information for the file. 

	     */

        void ChangeFileLockL( const TDesC& aFileName, TFileLockFlags aFlags );

    public:

    /**

     * Feature manager state machine function.

     * This returns the feature manager back to a normal state.

     * @param BURStatus current state

     * @return BURStatus the next state

     */ 

    BURStatus Goto_NormalState( BURStatus aCurrent );

    /**

     * Feature manager state machine function.

     * This will put the Feature Manager into the "start backup" state. Where the Feature Manager

     * is expecting the BUR backup to start.

     * @param BURStatus current state

     * @return BURStatus the next state

     */ 

    BURStatus Goto_StartBackupState( BURStatus aCurrent );

    /**

     * Feature manager state machine function.

     * This will put the Feature Manager into the "end backup" state. Where the Feature Manager

     * is expecting the BUR backup has just ended, and it is required to return itself to a 

     * normal operating mode.

     * @param BURStatus current state

     * @return BURStatus the next state

     */ 

    BURStatus Goto_EndBackupState( BURStatus aCurrent );

    /**

     * Feature manager state machine function.

     * This will put the Feature Manager into the "start restore" state. Where the Feature Manager

     * is expecting the BUR restore operation to start.

     * @param BURStatus current state

     * @return BURStatus the next state

     */ 

    BURStatus Goto_StartRestoreState( BURStatus aCurrent );

    /**

     * Feature manager state machine function.

     * This will put the Feature Manager into the "end restore" state. Where the Feature Manager

     * is expecting the BUR restore operation has just ended, and it is required to return itself 

     * to a normal operating mode.

     * @param BURStatus current state

     * @return BURStatus the next state

     */ 

    BURStatus Goto_EndRestoreState( BURStatus aCurrent );

    /**

     * Feature manager state machine function.

     * This will return the Feature Manager from its current state, and into a "safe" state whereby

     * a normal operating mode is possible again. This is an error recovery function.

     * @param BURStatus current state

     * @return BURStatus the next state

     */ 

    BURStatus Goto_ErrorState( BURStatus aCurrent );

    private:

    /* Clears the feature array ready to re-populate it during a restore operation */

    void ClearFeatures( void );

    /* Reloads the feature array and merges features during a restore operation */

    void LoadFeaturesL( void );

    /* Handles any outstanding notifications after a restore operation */

    void HandleRestoredNotificationsL( void );

    private:

        /**

         C++ constructor.

        */

        CFeatMgrServer( const TInt aPriority, 

                        const TServerType aType = EUnsharableSessions );

        /**

         By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

        /**

         Creates a new session when client connects.

         @param aVersion Version

         @param aMessage 'connect' message from the client

         @return Pointer to created session or leaves with codes

                 KErrNotSupported if versions does not match

                 KErrNoMemory if creation of new session fails.

        */

        CSession2* NewSessionL( const TVersion& aVersion,

                                const RMessage2& aMessage ) const;

        /**

         Panics the server thread

         @param aCategory Panicer's id 

         @param aPanic    Reason of panic 

         @return void

        */

        void Panic( const TDesC& aCategory, const TInt aReason );

        /**

         Lists and loads Feature Manager plugins.

        */

        TBool LoadPluginsL();

        /**

         Deletes plugin handler if feature info is ready.

        */

        void DeletePlugins();

        /**

         Check whether plugins have finished processing.

        */

        void CheckPluginsReadyL();

        /**

         Calls ServicePendingRequestsL of sessions  

        */

        void ServicePendingRequests();

    private:    // Data

        // Timer pointer.

        CFeatMgrTimer* iTimer;     

        CBurState iBurState;

        // ETrue when feature info received from all plugins

        TBool iPluginsReady;

        // Struct to contain information of found Feature Manager plugins

        struct SFeatMgrPluginInfo

            {

            // Plugin handler of the plugin

            CFeatMgrPluginHandler*  iPluginHandler;

            // ETrue if feature info received from plugin handler

            TBool iPluginReady;

            };

	    // Array of found Feature Manager plugins

	    RArray<SFeatMgrPluginInfo>  iPluginList;

        // ETrue if all plugin handlers are deleted

        TBool  iPluginsDeleted;

        // ETrue if ServicePendingRequest not called yet.

        TBool iPendingRequests;

        // File server session

        RFs iFs;         

        // ETrue when iPluginsReady is ETrue and all feature files have been read. 

        TBool iFeaturesReady;

        CFeatMgrFeatureRegistry* iRegistry;

        // Backup Notification

        TUint32                   iBackupFlag;

        CBaBackupSessionWrapper * iBackupNotification;

#ifdef EXTENDED_FEATURE_MANAGER_TEST

        TInt iSessionCount;

        CShutdown iShutdown;

#endif

    };

#endif      // FEATMGRSERVER_H 

// End of File