--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/srsf/vcommandhandler/src/contextprovider.cpp	Thu Dec 17 08:46:30 2009 +0200
@@ -0,0 +1,262 @@
+/*
+* Copyright (c) 2006 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:  Provides access to the VAS context
+*
+*/
+
+
+#include "rubydebug.h"
+#include "contextprovider.h"
+
+#include <nssvasmcontextmgr.h>
+#include <nssvasmcontext.h>
+#include "vcommandinternalapi.h"
+
+_LIT( KContextProviderPanic, "VCP" );
+
+CContextProvider* CContextProvider::NewL( CNssVASDBMgr& aVasDbManager )
+	{
+	CContextProvider* self = CContextProvider::NewLC( aVasDbManager );
+	CleanupStack::Pop( self );
+	return self;
+	}
+	
+CContextProvider* CContextProvider::NewLC( CNssVASDBMgr& aVasDbManager )
+	{
+	CContextProvider* self = new (ELeave) CContextProvider;
+	CleanupStack::PushL( self );
+	// No part of initialization can leave -> no ConstructL()
+	self->iContextManager = aVasDbManager.GetContextMgr();
+	return self;
+	}
+	
+CContextProvider::~CContextProvider()
+	{
+	delete iSaveContextWaiter; // if any
+	delete iVasContext;  // if any
+	}
+	
+/**
+* Returns the VCommand VAS context. If it doesn't exists,
+* it is being created. client is responsible for the context deletion
+* 
+* @todo If support for different contexts is needed, 
+* 1) Rename the method into GetContextLC;
+* 2) add the optional
+* argument "const TDesC& aContextName = KVoiceCommandContext"
+*/
+MNssContext* CContextProvider::GetVCommandContextLC()
+	{
+	RUBY_DEBUG0( "CContextProvider::GetVCommandContextL start" );
+    __ASSERT_ALWAYS( !iVasContext, User::Leave( KErrNotReady ) );
+    if( iContextManager->GetContextList( this ) != KErrNone )
+        {
+        RUBY_DEBUG0( "CContextProvider::GetVCommandContextL No context in the VAS yet. Creating one" );
+        return CreateVCommandContextLC();
+        }
+    else
+        {
+        RUBY_DEBUG0( "CContextProvider::GetVCommandContextL List of contexts requested" );
+        }
+        TRAPD ( err, WaitForAsyncCallbackL(); );
+        if ( err )
+            {
+            iContextManager->CancelGetContext();
+            User::Leave( err );
+            }
+        MNssContext* result = iVasContext;
+        iVasContext = NULL;        
+        CleanupDeletePushL( result );
+        
+        RUBY_DEBUG0( "CContextProvider::GetVCommandContextL end" );
+        return result;
+	}
+
+/**
+* Creates VCommand context. To be called during the GetVCommandContextLC
+* sequence
+*/	
+MNssContext* CContextProvider::CreateVCommandContextLC()
+	{
+	RUBY_DEBUG0( "CContextProvider::CreateVCommandContextLC start" );
+	__ASSERT_ALWAYS( !iVasContext, User::Leave( KErrNotReady ) );
+    iVasContext = iContextManager->CreateContextL();
+    iVasContext->SetNameL( KVoiceCommandContext );
+    iVasContext->SetGlobal( ETrue );
+    
+    if ( iContextManager->SaveContext( this, iVasContext ) != 
+                            KErrNone )
+        {
+        RUBY_ERROR0( "CContextProvider::CreateVCommandContextLC SaveContext call failed" );
+        User::Leave( KErrAbort );
+        }
+    else 
+        {
+        RUBY_DEBUG0( "CContextProvider::CreateVCommandContextLC SaveContext requested" );
+        }
+        
+    // We cannot use the inherited WaitForAsyncCallback. 
+    // It might already be waiting from GetVCommandContextLC
+    /** 
+     * @todo Consider transforming WaitForAsyncCallback from wait/released into 
+     *        wait_counter
+     */
+    iSaveContextWaiter = CAsyncWorker::NewL();
+    iSaveContextWaiter->WaitForAsyncCallbackL();
+    delete iSaveContextWaiter;
+    iSaveContextWaiter = NULL;
+    MNssContext* result = iVasContext;
+    iVasContext = NULL;
+    CleanupDeletePushL( result );
+
+    RUBY_DEBUG0( "CContextProvider::CreateVCommandContextLC end" );
+    return result;
+	}	
+				
+// From MNssGetContextClient
+/**
+* Callback to indicate GetContext successed.
+* client has to delete the context after using the context.
+* @since 2.0
+* @param aContext
+* @param aErrorCode KErrNone if getting of context was successfull
+* @return None
+*/
+void CContextProvider::GetContextCompleted( MNssContext* /*aContext*/,
+                                            TInt /*aErrorCode*/ )
+	{
+	RUBY_ERROR0( "CContextProvider::GetContextCompleted Should never be called" );
+	__ASSERT_ALWAYS( EFalse, User::Panic( KContextProviderPanic, KErrNotSupported ) );
+	}
+
+/**
+* Callback to indicate GetContext successed.
+* client has to ResetAndDestroy() after using the list.
+* @since 2.0
+* @param aContextList A list of contexts. 
+* @param aErrorCode KErrNone if getting of context list was successfull
+* @return None
+*/
+void CContextProvider::GetContextListCompleted(
+    MNssContextListArray *aContextList, TInt aErrorCode )
+	{
+	// No single L function called => TRAPD( DoGetContextListCompletedL() ) not needed
+    RUBY_DEBUG0( "CContextProvider::GetContextListCompleted start" );
+    
+    if( aErrorCode == KErrNone )
+        {
+        TInt err = KErrNone;
+
+        if ( iVasContext )
+            {
+            RUBY_ERROR0( "CContextProvider::GetContextListCompleted iVasContext is not NULL" );
+            err = KErrAlreadyExists;
+            }
+       
+        if( !aContextList )
+            {
+            RUBY_ERROR0( "CContextProvider::GetContextListCompleted empty context list" );
+            err = KErrArgument;
+            }
+        
+        if( err == KErrNone )  // guarding conditions are ok
+            {
+            RUBY_DEBUG1( "CContextProvider::GetContextListCompleted Iterating over [%d] contexts",
+                        aContextList->Count() );
+            for( TInt i ( 0 ); i < aContextList->Count(); i++ ) 
+                {
+                if ( aContextList->At(i)->ContextName() == KVoiceCommandContext )
+                    {
+                    iVasContext = aContextList->At( i );
+                    }
+                else
+                    {
+                    delete aContextList->At( i );
+                    }
+                }  // for
+            aContextList->Reset();
+            delete aContextList;
+        
+        	if( !iVasContext ) 
+    	        {
+    	        RUBY_DEBUG0( "CContextProvider::GetContextListCompleted COMMAND context not found" );
+    	        TRAP( err,
+    	                iVasContext = CreateVCommandContextLC();
+    	        		CleanupStack::Pop( iVasContext );
+    	        		);
+    	        if( err != KErrNone )
+    	        	{
+    	        	RUBY_ERROR1( "CContextProvider::GetContextListCompleted \
+    	        				 Failed to create the VCommandContext", err );
+    	        	}
+    	        }
+            }  // if guarding conditions are ok
+            
+        if( err != KErrNone )
+        	{
+        	RUBY_ERROR1( "CContextProvider::GetContextListCompleted failed with [%d]", err );
+        	// Whenever error is returned, post-WaitForAsynchCallbackL code has no chance
+            // to clean the iVasContext;
+            delete iVasContext;
+            iVasContext = NULL;
+        	}
+            
+        StopAsyncWaitingOrPanic( err );
+        }
+        
+    else // aErrorCode is not KErrNone
+        {
+        RUBY_ERROR1( "CContextProvider::GetContextCompleted error. Error code [%d] ", aErrorCode );
+        
+        // Whenever error is returned, post-WaitForAsynchCallbackL code has no chance
+        // to clean the iVasContext;
+        delete iVasContext;
+        iVasContext = NULL;
+        StopAsyncWaitingOrPanic( aErrorCode );       
+        }
+    
+    RUBY_DEBUG0( "CContextProvider::GetContextListCompleted end" );     
+   	}
+
+// From MNssSaveContextClient
+
+/**
+* Callback to indicate SaveContext successed.
+* @since 2.0
+* @param aErrorCode KErrNone if saving of context was successfull
+* @return None
+*/
+void CContextProvider::SaveContextCompleted( TInt aErrorCode )
+	{
+	RUBY_DEBUG0( "CContextProvider::SaveContextCompleted start" );
+	
+	if( aErrorCode == KErrNone )
+	    {
+	    iSaveContextWaiter->StopAsyncWaitingOrPanic( KErrNone );    
+	    }
+    else
+        {
+        RUBY_ERROR1( "CContextProvider::SaveContextCompleted error. Error code [%d] ", aErrorCode );
+        
+        // Whenever error is returned, post-WaitForAsynchCallbackL code has no chance
+        // to clean the iVasContext;
+        delete iVasContext;
+        iVasContext = NULL;
+        iSaveContextWaiter->StopAsyncWaitingOrPanic( aErrorCode );        
+        }
+    
+    RUBY_DEBUG0( "CContextProvider::SaveContextCompleted end" );
+	}
+
+//End of file