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//system includes

#include <e32base.h>

#include <s32mem.h>

//user includes

#include "cntsymbiansrvconnection.h"

#include "cntsymbiantransformerror.h"

// Constants

// To be removed. Should be defined in a header file

#define KCntSearchResultIdLists 99

#define KCntOpenDataBase 100 // = KCapabilityReadUserData

_LIT(KCntServerExe,"CNTSRV.EXE");   // Name of the exe for the Contacts server.

_LIT(KCntServerName,"CNTSRV");  // Name used to connect a session 

                                // to the Contacts server.

/** Maximum number of asynchronous IPC calls. */

const TInt KAsyncMessageSlots=6;

/* Contacts server version number. */ 

const TInt KCntServerMajorVersionNumber=1;

const TInt KCntServerMinorVersionNumber=1;

const TInt KCntServerBuildVersionNumber=1;

const TInt KGranularityRank = 8; //2^8 = 256 bytes

const TInt KDefaultPackagerSize = 3514; //Observed Techview Golden template size.

/*!

 * The constructor

 */

CntSymbianSrvConnection::CntSymbianSrvConnection() :

    m_buffer(0),

    m_bufPtr(0,0,0),

    m_isInitialized(false)

{

}

/*!

 * Destructor 

 */

CntSymbianSrvConnection::~CntSymbianSrvConnection()

{

    delete m_buffer;

    RHandleBase::Close();

}

/*!

 * Query the SQL database

 * 

 * \a sqlQuery An SQL query

 * \a error On return, contains the possible error.

 * \return the list of matched contact ids

 */

QList<QContactLocalId> CntSymbianSrvConnection::searchContacts(const QString& sqlQuery, 

                                                       QContactManager::Error* error)

{

    QList<QContactLocalId> list;

    TPtrC queryPtr(reinterpret_cast<const TUint16*>(sqlQuery.utf16()));

    TRAPD(err, list = searchContactsL(queryPtr));

    CntSymbianTransformError::transformError(err, error);

    return list;

}

/*!

 * The leaving function that queries the SQL database

 * 

 * \a aSqlQuery An SQL query

 * \return the list of matched contact ids

 */

QList<QContactLocalId> CntSymbianSrvConnection::searchContactsL(const TDesC& aSqlQuery)

{

    // Initialize connection if it is not initialized yet.

    if (!m_isInitialized) {

        ConnectSrvL();

        OpenDatabaseL();

        m_isInitialized = true;

    }

    // Fetch results from the server

    TIpcArgs args;

    args.Set(0, &GetReceivingBufferL());

    args.Set(1, &aSqlQuery);

    TInt newBuffSize = SendReceive(KCntSearchResultIdLists, args);

    User::LeaveIfError(newBuffSize);

    if (newBuffSize > 0)

        {

        args.Set(0, &GetReceivingBufferL(newBuffSize));

        args.Set(1,&aSqlQuery);

        User::LeaveIfError(newBuffSize = SendReceive(KCntSearchResultIdLists, args));     

        }

    // Unpack the contact ids into an list

    return UnpackCntIdArrayL();

}

/*!

 * Connect to / create a cntsrv server session

 */

void CntSymbianSrvConnection::ConnectSrvL()

{

    // Assume the server is already running and attempt to create a session

    // with a maximum of KAsyncMessageSlots message slots.

    TInt err = CreateSession(KCntServerName,Version(),KAsyncMessageSlots);

    // Server is not running

    if(err == KErrNotFound) {

        // Use the RProcess API to start the server.

        RProcess server;

        User::LeaveIfError(server.Create(KCntServerExe,KNullDesC));

        //Enforce server to be at system default priority EPriorityForeground

        server.SetPriority(EPriorityForeground);

        // Synchronize with the server.

        TRequestStatus reqStatus;

        server.Rendezvous(reqStatus);

        server.Resume();

        // Server will call the reciprocal static synchronization call.

        User::WaitForRequest(reqStatus);

        server.Close();

        User::LeaveIfError(reqStatus.Int());

        // Create the server session.

        User::LeaveIfError(CreateSession(KCntServerName,Version(),KAsyncMessageSlots));

    } else {

        User::LeaveIfError(err);

    }

    // Create IPC buffer

    m_buffer = CBufFlat::NewL(1 << KGranularityRank);

    m_maxBufferSize = KDefaultPackagerSize;

}

/*!

 * Open database

 */

void CntSymbianSrvConnection::OpenDatabaseL()

{

    TIpcArgs args;

    args.Set(0, &KNullDesC);

    User::LeaveIfError(SendReceive(KCntOpenDataBase, args));

}

/*!

 * Version of cntsrv

 */

TVersion CntSymbianSrvConnection::Version() const

{

    return(TVersion(KCntServerMajorVersionNumber,

                    KCntServerMinorVersionNumber,

                    KCntServerBuildVersionNumber));

}

/*!

 * Get the buffer reference to be used for IPC

 * 

 * \a size size of the receiving buffer

 * \return a reference to the beginning of the buffer

 */

TDes8& CntSymbianSrvConnection::GetReceivingBufferL(int size)

{

    if(size > m_buffer->Size()) {

        // Find next divisable by granularity size value.

        (size >>= KGranularityRank)++;

        m_maxBufferSize = size <<= 8;

        m_buffer->ResizeL(m_maxBufferSize);

    } else if(!size && m_buffer->Size() < m_maxBufferSize) {

        // Use the stored default size.

        m_buffer->ResizeL(m_maxBufferSize);

    }

    // The location of the whole buffer may have changed, because reallocation

    // may have taken place. Update both buffer pointers.

    m_bufPtr.Set(m_buffer->Ptr(0));

    return m_bufPtr;

}

/*!

 * Unpack results from a buffer stream and store in a list

 * 

 * \return list of matched contact ids

 */

QList<QContactLocalId> CntSymbianSrvConnection::UnpackCntIdArrayL()

{

    RBufReadStream readStream;

    QList<QContactLocalId> list;

    TContactItemId item;

    readStream.Open(*m_buffer);

    int count = readStream.ReadInt32L();

    for (int i=0; i<count; i++) {

        readStream >> item;

        list.append(item);

    }

    return list;

}