examples/ForumNokia/SMSExample/Engine/src/SmsEngine.cpp

/*
 * Copyright © 2008 Nokia Corporation.
 */

#include "SMSEngine.h"
#include <msvids.h> // Folder Ids
#include <txtrich.h> // CRichText
#include <smut.h>
#include <eikdef.h>
#include <eikenv.h>
#include <rsendas.h>
#include <rsendasmessage.h>

#include "SmsEnginePanics.pan"


#ifdef __WINS__
const TMsvId KObservedFolderId = KMsvDraftEntryId;
#else
const TMsvId KObservedFolderId =  KMsvGlobalInBoxIndexEntryId;
#endif

const TMsvId KInbox = KMsvGlobalInBoxIndexEntryId;
const TMsvId KOutbox = KMsvGlobalOutBoxIndexEntryId;
const TMsvId KDrafts = KMsvDraftEntryId;

const TInt KDelayTime = 1000*3000;
const TInt KErrMsgLength = 20;

_LIT(KEmptyMsg,"");

//  CONSTRUCTION AND DESTRUCTION
EXPORT_C CSmsEngine* CSmsEngine::NewL(MSmsEngineObserver& aObserver)
    {
    CSmsEngine* self = CSmsEngine::NewLC(aObserver);
    CleanupStack::Pop( self );
    return self;
    }

EXPORT_C CSmsEngine* CSmsEngine::NewLC(MSmsEngineObserver& aObserver)
    {
    CSmsEngine* self = new( ELeave ) CSmsEngine(aObserver);
    CleanupStack::PushL( self );
    self->ConstructL();
    return self;
    }

EXPORT_C CSmsEngine::~CSmsEngine()
    {
    delete iMsvEntry;
    iMsvEntry = NULL;

    delete iMsvSession;
    iMsvSession = NULL;

    delete iEngine;
    iEngine = NULL;
    }

CSmsEngine::CSmsEngine(MSmsEngineObserver& aObserver) : iObserver(aObserver)
    {
    }

void CSmsEngine::ConstructL()
    {
    iAutomaticDelete = EFalse;

    iListeningForIncoming = ETrue;

    iEngine = CSMSExampleMtmsEngine::NewL(*this);

    // SMS automatic receiving needs a session to the messaging server
    iMsvSession = CMsvSession::OpenAsyncL(*this);
    }

//listening for incoming message
void CSmsEngine::HandleSessionEventL(TMsvSessionEvent aEvent, TAny* aArg1,
                                           TAny* aArg2, TAny* /*aArg3*/)
    {
    switch (aEvent)
        {
            //One way to make sure that the message has been sent
            //is to watch the sent items folder.
            //The sent SMS could also be deleted here

            //case EMsvEntriesMoved:
            //{
            //Check if our message has gone to the sent items
            //if (aArg2 && (*(static_cast<TMsvId*>(aArg2)) == KMsvSentEntryId) )
            //    {
            //    CMsvEntrySelection* entries =
            //      static_cast<CMsvEntrySelection*>(aArg1);

                //Note: this doesn't work if the message has been waiting
                //to be sent and has been sent after a boot.
                //In that case the deletion should be done when the server is
                //ready again and the sent items (and also drafts) is searched.
            //    if (entries && iSentMessageId == entries->At(0))
            //        {
            //        Model().State(ESmsEngineSent);
                    //if it's our message and we're supposed to delete it
            //        if( iAutomaticDeleteFromSentItems ) //note a new flag
            //            {
            //            iMsvSession->RemoveEntry(iSentMessageId);
            //            }
            //        }
            //    iObserver.MessageSent();
            //    }
            //break;
            //}
        case EMsvServerReady:
            // Initialise iMsvEntry
            if (!iMsvEntry)
                {
                iMsvEntry = CMsvEntry::NewL(*iMsvSession, KInbox,
                                            TMsvSelectionOrdering());


                //Sent SMS might be left to drafts if the phone was booted during
                //SMS sending.

                //Engine could also be used for retrieving a response for
                //a message. Response could arrive after phone has been booted
                //so it should be checked here.
                //Now that we're ready to handle messages we could check
                //if there's a response in the inbox.
                //This could be the case only if the message has been
                //sent and the phone has been booted while waiting.

                //The same applies to sending and deleting the sent message
                //Sent message could be left in the sent items if the phone
                //was booted before the sent message had been removed.

                //for these situations the engine should be implemented as a
                //state machine and engines state should be checked on initialization.
                //Of course there might be multiple clients (for example if engine
                //implementation would be a server) so there's a need to
                //have own state of each client (as in server session).

                //implementation could be something like
                //TSmsEngineState state = Model().State();

                //if( state == ESmsEngineSending )
                //  {

                    //Make sure that the sent message will be deleted.
                    //TBool found(EFalse);

                    //TRAPD(error, SearchForSentMessageFromSentMessagesL(found) );

                    //if ( !found )
                    //  {
                        //If the sent message is stuck in drafts
                    //  TRAP(error, SearchForSentMessageFromDraftsL(found) );
                        //If this is the case then resend!
                    //  }

                    //if the message is somehow mystically lost,
                    //then it's handled as the message has been sent.
                    //if( !found )
                    //  {
                    //  Model().State(ESmsEngineSMSSent);
                    //  }
                //  }

                }
            break;

        case EMsvEntriesCreated:
            // Only look for changes in the Inbox
            if (aArg2 &&  *(static_cast<TMsvId*>(aArg2)) == KObservedFolderId)
                {
                CMsvEntrySelection* entries =
                                    static_cast<CMsvEntrySelection*>(aArg1);
                if( entries->Count() >= 1 )
                    {
                    iNewMessageId = entries->At(0);
                    }
                else
                    {
                    Panic(ESmsEngineInternal);
                    }
                }
            break;

        case EMsvEntriesChanged:
            //Look for changes. When using the emulator observed folder is
            //drafts, otherwise inbox.
            //Also a check for the iListeningForIncoming is made
            if (aArg2 &&  *(static_cast<TMsvId*>(aArg2)) == KObservedFolderId
                      && iListeningForIncoming )
                {
                CMsvEntrySelection* entries =
                                    static_cast<CMsvEntrySelection*>(aArg1);

                //improvement for the case of receiving a response

                //When the phone is booted and the message has arrived before
                //application has started it only receives notification of
                //changes
                //in the inbox (when the user reads the message!), not the
                //creation where these id is initialized.
                //therefore we check when changes occur that if the iNewMessageID
                //is -1 we make client handle the response.
                //Check the id of the message (iNewMessageId is set
                //in case of EMsvEntriesCreated)

                //code could be something like:
                //if ( entries && (iNewMessageId == entries->At(0) || iNewMessageId == -1) )

                if( entries->Count() < 1 )
                {
                    Panic(ESmsEngineInternal);
                }
                else if (iNewMessageId == entries->At(0))
                    {

                    if( !iMsvEntry )
                        {
                        Panic(ESmsEngineNotInitialized);
                        return;
                        }

                    // Set entry context to the new message
                    iMsvEntry->SetEntryL(iNewMessageId);

                    // Check the type of the arrived message and that the
                    // message is complete.
                    // only SMS's are our consern.
                    if ( iMsvEntry->Entry().iMtm != KUidMsgTypeSMS ||
                         !iMsvEntry->Entry().Complete() )
                        {
                        return;
                        }

                    // Read-only store.
                    CMsvStore* store = iMsvEntry->ReadStoreL();
                    CleanupStack::PushL(store);

                    // Get address of received message.
                    TBuf<KSmsMessageLength> iAddress(
                                                   iMsvEntry->Entry().iDetails
                                                   );

                    if (store->HasBodyTextL())
                        {
                        CRichText* richText = CRichText::NewL(
                           CEikonEnv::Static()->SystemParaFormatLayerL(),
                           CEikonEnv::Static()->SystemCharFormatLayerL());
                        CleanupStack::PushL(richText);
                        store->RestoreBodyTextL(*richText);
                        const TInt length = richText->DocumentLength();

                        TBuf<KSmsMessageLength> number;
                        TPtrC ptr = richText->Read(0, length);

                        //iMessage = ptr;
                        iMessage.Copy(ptr);
                        //iLogView->DrawTextL( address );
                        CleanupStack::PopAndDestroy(richText);


                        iObserver.MessageReceived(iAddress, iMessage);

                        }
                    else
                        {
                        iObserver.MessageReceived(iAddress, KEmptyMsg);
                        }

                    CleanupStack::PopAndDestroy(store);

                    // Automatic delete setting
                    if ( iAutomaticDelete )
                        {
                        // Ncnlist seems to panic if there is no time to play arrived
                        // message tone before deletion.
                        //Codescanner gives a critical
                        User::After(KDelayTime);

                        iMsvSession->RemoveEntry(iNewMessageId);

                        iObserver.MessageDeleted();
                        }
                    }
                }
            break;

        default:
            break;
        }
    }

//callback from CSMSExampleMtmsEngine
void CSmsEngine::HandleMessageSentL(TInt aError)
    {
    if (aError == KErrNone)
        {
        iObserver.MessageSent();
        }
    else // If there was some error sending the SMS
        {
        iObserver.SmsEngineError(aError);
        }
    }

//sending a sms
EXPORT_C void CSmsEngine::SendSmsL(const TDesC& aAddr, const TDesC& aMsg)
    {
    TInt err (KErrNone);
    
    TRAP(err, SendSmsInThirdEditionL(aAddr, aMsg));
    
    if( err )
        {
        iObserver.SmsEngineError(err);
        }
     else
        {
        iObserver.SendingMessage();
        }
    }

//Sending the sms in third edition with RSendAs
void CSmsEngine::SendSmsInThirdEditionL(const TDesC& aAddr, const TDesC& aMsg)
    {
    RSendAs sendAs;
    User::LeaveIfError(sendAs.Connect());
    CleanupClosePushL(sendAs);

    RSendAsMessage sendAsMessage;
    sendAsMessage.CreateL(sendAs, KUidMsgTypeSMS);
    CleanupClosePushL(sendAsMessage);

    // prepare the message
    sendAsMessage.AddRecipientL(aAddr, RSendAsMessage::ESendAsRecipientTo);
    sendAsMessage.SetBodyTextL(aMsg);

    // send the message
    sendAsMessage.SendMessageAndCloseL();

    // sendAsMessage (already closed)
    CleanupStack::Pop();

    // sendAs
    CleanupStack::PopAndDestroy();
    }

//setting the received message notyfication on/off
EXPORT_C void CSmsEngine::ListenforIncomingSms(TBool aListening)
    {
    // the iMsvSession could be opened in here when needed
    // now the flag only indicates that do we notify the client
    iListeningForIncoming = aListening;
    }

//setting the automatic deletion of received message on/off
EXPORT_C void CSmsEngine::SetAutomaticDeletetion(TBool aDeletion)
    {
    // automatic deletion for incoming message isn't done if
    // iListeningForIncoming is false
    iAutomaticDelete = aDeletion;
    }

//getting messages from a folder
EXPORT_C void CSmsEngine::GetFolderSMSMessageInformationL(TMsvId aFolderID,
                                                CDesCArrayFlat*& aAddresses,
                                                CDesCArrayFlat*& aMessages)
    {
    iEngine->GetFolderSMSMessageInformationL(aFolderID, aAddresses, aMessages);
    }

//getting messageids from a folder after having called
//GetFolderSMSMessageInformationL
EXPORT_C RArray<TMsvId>* CSmsEngine::GetMessageIds()
    {
    return iEngine->GetMessageIds();
    }

//Copying a message to specified folder
EXPORT_C void CSmsEngine::CopyMessageL( TMsvId aMessageId, TMsvId aFolder )
    {
    return iEngine->CopyMessageL(aMessageId, aFolder);
    }

//Moving a message to specified folder
EXPORT_C void CSmsEngine::MoveToFolderL( TMsvId aMessageId,  TMsvId aFolder )
    {
    iEngine->MoveToFolderL(aMessageId, aFolder);
    }

//Deleting a message from specified folder
EXPORT_C void CSmsEngine::DeleteMessageL( TMsvId aMessageId )
    {
    iEngine->DeleteMessageL(aMessageId);
    }

// End of file

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