/*

 * Name        : Provider.cpp

 * Description : 

 * Project     : This file is part of OpenMAR, an Open Mobile Augmented Reality browser

 * Website     : http://OpenMAR.org

 *

 * Copyright (c) 2010 David Caabeiro

 *

 * All rights reserved. This program and the accompanying materials are made available 

 * under the terms of the Eclipse Public License v1.0 which accompanies this 

 * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html

 *

 */

#include "Provider.h"

#include <Hash.h>

#include <Uri8.h>

#include "Logger.h"

/*

 * Generates a unique id using name and coordinates as a seed

 */

TUint32 GenerateIdL(const CPosLandmark& aLandmark)

{

    TPtrC name;

    aLandmark.GetLandmarkName(name);

    TLocality coordinate;

    aLandmark.GetPosition(coordinate);

    HBufC8* name8 = HBufC8::NewLC(name.Length());

    name8->Des().Copy(name);

    TRealFormat realFormat;

    realFormat.iPoint  = TChar('.');    // Override TLocale::DecimalSeparator() as separator

    realFormat.iWidth  = 8;             // Set max width of number

    realFormat.iPlaces = 5;             // Set max width of decimal portion

    TBuf8<KDefaultRealWidth> latitude;

    latitude.Num(coordinate.Latitude(), realFormat);

    TBuf8<KDefaultRealWidth> longitude;

    longitude.Num(coordinate.Longitude(), realFormat);

    CSHA1* hash = CSHA1::NewL();

    CleanupStack::PushL(hash);

    hash->Update(*name8);

    hash->Update(latitude);

    TPtrC8 result = hash->Final(longitude);

    // Use only 32 bits from hash

    const TUint32* ptr = reinterpret_cast<const TUint32*>(result.Ptr());

    TUint32 value = *ptr;

    CleanupStack::PopAndDestroy(2, name8);  // hash, name8

    return value;

}

// Create instance of concrete ECOM interface implementation

CProvider* CProvider::NewL()

{

    CProvider* self = new(ELeave) CProvider();

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

}

CProvider::~CProvider()

{

    delete iLoader;

}

CProvider::CProvider()

{

}

void CProvider::ConstructL()

{

    iLoader = CLoader::NewL(*this);

}

void CProvider::LandmarkLoaderOpenedL(TInt aError)

{

    if (iObserver)

        iObserver->POIProviderLoadedL(this, aError);

}

void CProvider::LandmarkLoaderItemCreatedL(const CPosLandmark& aLandmark)

{

    if (iObserver)

    {

        TPosLmItemId id = aLandmark.LandmarkId();

        if (id == KPosLmNullItemId)

            id = GenerateIdL(aLandmark);

        _LIT8(KObject, "geonames");

        OpenMAR::CPOIObject* object = OpenMAR::CPOIObject::NewL(KObject, *this);

        CleanupStack::PushL(object);

        object->SetIdentifier(id);

        TLocality locality;

        aLandmark.GetPosition(locality);

        object->SetCoordinate(locality);

        TPtrC name;

        aLandmark.GetLandmarkName(name);

        object->SetNameL(name);

        iObserver->POIObjectCreatedL(object);   // Transfers ownership

        CleanupStack::Pop(object);

    }

}

void CProvider::RetrieveL(const TCoordinate& aCoordinate, TReal32 aRadius)

{

    LOGARG("[GEONAMES] Retrieving entries from %f %f %f", aCoordinate.Latitude(), aCoordinate.Longitude(), aCoordinate.Altitude());

    iLoader->RequestL(aCoordinate, aRadius);

}