/*

* Copyright (c) 2007 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:  Calendar notifier

*

*/

#include <aknappui.h>                 // iavkonappui macro

#include <bacntf.h>                   // cenvironmentchangenotifier

#include <coemain.h>                  // eactiveprioritylogona

#include <centralrepository.h>        // crepository

#include <ErrorUI.h>                  // cerrorui

#ifndef SYMBIAN_ENABLE_SPLIT_HEADERS // new 

#include <asshdalarm.h>

#else // new

#include <asshdalarm.h>

#include <ASShdAlarmCal.h>

#endif // new

#include <e32property.h>

#include <calfilechangenotification.h>

#include <calenecomwatcher.h>

#include <calenglobaldata.h>

#include <calenconstants.h>

#include <calencontext.h>

#include <calsession.h>

#include <calcalendarinfo.h>

#include <calenmulticaluids.hrh>

#include "calendarui_debug.h"

#include "calennotifier.h"            // CCalenNotifier

#include "CalendarPrivateCRKeys.h"    // Central Repository keys

#include "calensetting.h"

#include "calenstatemachine.h"

#include "calencontroller.h"

const TInt KHashLength = 64;

const TInt KBuffLength = 24;

// ----------------------------------------------------------------------------

// CCalenNotifier::CCalenNotifier

// C++ default constructor.

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

CCalenNotifier::CCalenNotifier( CCalenController& aController )

    : iController( aController )

    {

    TRACE_ENTRY_POINT;

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

// CCalenNotifier::~CCalenNotifier

// Destructor.

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

CCalenNotifier::~CCalenNotifier()

    {

    TRACE_ENTRY_POINT;

    // Reset the handler array.

    // Before we reset , close hashset for each handler

    for(TInt i = 0 ; i < iHandlers.Count() ; i++)

        {

        iHandlers[i].iHashSet.Close();

        }

    iHandlers.Close();

    if( iFilnameDeleted )

        {

        delete iFilnameDeleted;

        iFilnameDeleted = NULL;

        }

    // Stop ECom change notifications

    if( iEComWatcher )

        {

        delete iEComWatcher;

        iEComWatcher = NULL;

        }

    // Stop settings change notifications

    if( iCenRepChangeNotifier )

        {

        delete iCenRepChangeNotifier;

        iCenRepChangeNotifier = NULL;

        }

    if( iRepository )

        {

        delete iRepository;

        iRepository = NULL;

        }

    // Stop environment change notifications

    if( iEnvChangeNotifier )

        {

        iEnvChangeNotifier->Cancel();

        delete iEnvChangeNotifier;

        }

    if( iSetting )

        {

        iSetting->Release();

        }

    // Release the global data

    if( iGlobalData )

        {

        // stop listening for calendar file change notifications

        TRAP_IGNORE(iGlobalData->CalSessionL().StopFileChangeNotification());

        iGlobalData->Release();

        }

	}

// ----------------------------------------------------------------------------

// CCalenNotifier::ConstructL

// Symbian 2nd phase of construction.

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::ConstructL()

    {

    TRACE_ENTRY_POINT;

    // Get the global data

    iGlobalData = CCalenGlobalData::InstanceL();

    // Get the setting singleton. We update it when settings change.

    iSetting = CCalenSetting::InstanceL();

    // Register for system environment changes

    TCallBack envCallback( EnvChangeCallbackL, this );

    iEnvChangeNotifier =

        CEnvironmentChangeNotifier::NewL( EActivePriorityLogonA, envCallback );

    iEnvChangeNotifier->Start();

    // Register for changes to Calendar settings from the Central Repository

    iRepository = CRepository::NewL( KCRUidCalendar );

    iCenRepChangeNotifier = CCenRepNotifyHandler::NewL( *this, *iRepository );

    iCenRepChangeNotifier->StartListeningL();

    // Register for changes to the ECom registry

    iEComWatcher = CCalenEComWatcher::NewL( *this );

	iIgnoreFirstLocaleChange = ETrue;

	// start listening for calendar file change notifications

	iGlobalData->CalSessionL().StartFileChangeNotificationL(*this);

	iFilnameDeleted = NULL;

	TRACE_EXIT_POINT;

	}

// ----------------------------------------------------------------------------

// CCalenNotifier::RegisterForNotificationsL

// Adds the passed handler to the handler array.

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::RegisterForNotificationsL( MCalenNotificationHandler* aHandler, 

                                                TCalenNotification aNotification)

    {

    TRACE_ENTRY_POINT;

    TNotificationHandler handler;

    handler.iHandler = aHandler;

    //Prepare hash

    handler.iHashSet.ReserveL(KHashLength);

    if(ECalenNotifyAll == aNotification)

        {

        //ECalenNotifyAll indicates that all notifications to be registered

        //iterate through TCalenNotification enum and add the notifications to iHashSet

        for(TCalenNotification notificationIter = TCalenNotification(ECalenNotifyAll + 1); 

                                notificationIter < ECalenNotifyLast; 

                                notificationIter = TCalenNotification(notificationIter + 1))

            {

            handler.iHashSet.InsertL(notificationIter);

            }

        }

    else

        {

        //Add only single notification.

        handler.iHashSet.InsertL(aNotification);

        }

    iHandlers.Append( handler );

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

// CCalenNotifier::RegisterForNotificationsL

// Adds the passed handler to the handler array.

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::RegisterForNotificationsL( MCalenNotificationHandler* aHandler, 

                                                           RArray<TCalenNotification>& aNotifications  )

    {

    TRACE_ENTRY_POINT;

    TNotificationHandler handler;

    handler.iHandler = aHandler;

    //Prepare hash

    handler.iHashSet.ReserveL(KHashLength);

    if(aNotifications.Find(ECalenNotifyAll) != KErrNotFound)

        {

        //ECalenNotifyAll indicates that all notifications to be registered

        //If ECalenNotifyAll is found in aNotifications along with other notifications

        //iterate through TCalenNotification enum and add the notifications to iHashSet

        for(TCalenNotification notificationIter = TCalenNotification(ECalenNotifyAll + 1); 

                                    notificationIter < ECalenNotifyLast; 

                                    notificationIter = TCalenNotification(notificationIter + 1))

            {

            handler.iHashSet.InsertL(notificationIter);

            }

        }

    else

        {

        //Add notifocations from Array(aNotifications) into iHashSet member 

        for(TInt i = 0 ; i < aNotifications.Count() ; i++)

            {

            handler.iHashSet.InsertL(aNotifications[i]);

            }

        }

    iHandlers.Append( handler );

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

// CCalenNotifier::CancelNotifications

// Removes the passed handler from the handler array.

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::CancelNotifications( MCalenNotificationHandler* aHandler )

    {

    TRACE_ENTRY_POINT;

    for( TInt x = 0; x < iHandlers.Count(); ++x )

        {

        if( iHandlers[x].iHandler == aHandler )

            {

            // Mark the notification for deletion by

            // settings the handler to NULL. Actual deletion

            // will take place in DoBroadcast

            iHandlers[x].iHashSet.Close();

            iHandlers[x].iHandler = NULL;

            TRACE_EXIT_POINT;

            return;

            }

        }

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

//  CCalenNotifier::EnvChangeCallbackL

//  CEnvironmentChangeNotifier callback.  Calendar is only interested in:

//  EChangesLocale              - System locale changed

//  EChangesMidnightCrossover   - System time passed midnight

//  EChangesSystemTime          - System time changed

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

TInt CCalenNotifier::EnvChangeCallbackL( TAny* aThisPtr )

    {

    TRACE_ENTRY_POINT;

  /*  CCalenNotifier* thisPtr = static_cast<CCalenNotifier*>( aThisPtr );

    if( thisPtr->iEnvChangeNotifier->Change() & EChangesMidnightCrossover )

        {

        thisPtr->BroadcastNotification( ECalenNotifySystemTimeChanged );

        }

    if( thisPtr->iEnvChangeNotifier->Change() & EChangesLocale )

        {

        thisPtr->BroadcastNotification( ECalenNotifySystemLocaleChanged );

        }

    if( thisPtr->iEnvChangeNotifier->Change() & EChangesSystemTime ) 

        {

        thisPtr->BroadcastNotification( ECalenNotifySystemTimeChanged );

        }*/

    TRACE_EXIT_POINT;

    // Return value for functions used as TCallBack objects should be EFalse

    // unless the function is intended to be called again from a timer.

   // return EFalse;

    return static_cast<CCalenNotifier*>(aThisPtr)->DoEnvChange();

    }

// ----------------------------------------------------------------------------

//  CCalenNotifier::DoEnvChange

//  EnvChangeCallbackL calls this function

// ----------------------------------------------------------------------------

//

TInt CCalenNotifier::DoEnvChange()

	{

	TRACE_ENTRY_POINT;

	if( ((iEnvChangeNotifier->Change() & EChangesMidnightCrossover)

		|| (iEnvChangeNotifier->Change() & EChangesSystemTime))

		&& !iIgnoreFirstLocaleChange )

        {

        BroadcastNotification( ECalenNotifySystemTimeChanged );

        }

	else if( (iEnvChangeNotifier->Change() & EChangesLocale)

			&& !iIgnoreFirstLocaleChange )	

        {

        BroadcastNotification( ECalenNotifySystemLocaleChanged );

        }

     else

     	{

     	iIgnoreFirstLocaleChange = EFalse;

     	}   

    TRACE_EXIT_POINT; 

    return EFalse ;

	}

// ----------------------------------------------------------------------------

// CCalenNotifier::HandleNotifyGeneric

// From MCenRepNotifyHandlerCallback

// Generic notification that one of our central repository keys has changed

// If any keys change we broadcast a settings changed notification

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::HandleNotifyGeneric( TUint32 /*aId*/ )

    {

    TRACE_ENTRY_POINT;

    PIM_TRAPD_HANDLE( iSetting->LoadL() );

    BroadcastNotification( ECalenNotifySettingsChanged );

    // Use another trap to make sure we start listening again, regardless

    // of whether the previous function left or not.

    PIM_TRAPD_HANDLE( iCenRepChangeNotifier->StartListeningL() );

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

// CCalenNotifier::HandleNotifyError

// Cenrep watcher error callback

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::HandleNotifyError( TUint32 /*aId*/,

                                                    TInt /*aError*/,

                                                    CCenRepNotifyHandler* /*aHandler*/ )

    {

    TRACE_ENTRY_POINT;

    PIM_TRAPD_HANDLE( iCenRepChangeNotifier->StartListeningL() );

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

// CCalenNotifier::HandleDBChangeL

// From MCalenDBChangeObserver

// Notification that an external CCalSession has modified the database we are

// using in some way.  This notification is limited to a maximum of one per

// second.  This is to avoid multiple notifications when performing large sync

// operations

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::HandleDBChangeL()

    {

    TRACE_ENTRY_POINT;

    BroadcastNotification( ECalenNotifyExternalDatabaseChanged );

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

// CCalenNotifier::ContextChanged

// From MCalenContextChangeObserver. Called when the context changes.

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::ContextChanged()

    {

    TRACE_ENTRY_POINT;

    BroadcastNotification( ECalenNotifyContextChanged );

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

// CCalenNotifier::EComChanged

// From MCalenEComChangeObserver. Called when the ECom registry changes 

// (install/uninstall).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::EComChanged()

    {

    TRACE_ENTRY_POINT;

    if(!iController.IsFasterAppFlagEnabled())

        {

        BroadcastNotification( ECalenNotifyEComRegistryChanged );

        }

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

// CCalenNotifier::DeferSettingsNotifications

// After calling this function, any settings changed notifications

// will not be broadcast until after ResumeSettingsNotifications

// has been called.

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::DeferSettingsNotifications()

    {

    TRACE_ENTRY_POINT;

    iIsSettingsBroadcastDeferred = ETrue;

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

// CCalenNotifier::ResumeSettingsNotifications

// Resumes settings notifications after they have been paused

// with DeferSettingsNotifications.

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::ResumeSettingsNotifications()

    {

    TRACE_ENTRY_POINT;

    iIsSettingsBroadcastDeferred = EFalse;

    if( iSettingsNeedsBroadcast )

        {

        iSettingsNeedsBroadcast = EFalse;

        BroadcastNotification( ECalenNotifySettingsChanged );

        }

    if( iLocaleNeedsBroadcast )

        {

        iLocaleNeedsBroadcast = EFalse;

        BroadcastNotification( ECalenNotifySystemLocaleChanged );

        }

    TRACE_EXIT_POINT;

    }

// ----------------------------------------------------------------------------

// CCalenNotifier::BroadcastNotification

// Issues a notification to all registered handlers

// (other items were commented in a header).

// ----------------------------------------------------------------------------

//

void CCalenNotifier::BroadcastNotification( TCalenNotification aNotification )

    {

    TRACE_ENTRY_POINT;

    // Someone has told us to broadcast, or one of our notifiers completed.

    // We run it past the state machine and that may or may not call the

    // function to really do the broadcast.

    iController.StateMachine().HandleNotification( aNotification );

    TRACE_EXIT_POINT;

    }