/*

* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:  The client side connection to a folder on the FeedsSever.

*

*/

#ifndef FEEDS_SERVER_FOLDER_ITEM_H

#define FEEDS_SERVER_FOLDER_ITEM_H

// INCLUDES

#include <e32base.h>

#include <e32std.h>

#include <FeedsServerRequestHandler.h>

#include <feedsentity.h>

#include <leaktracker.h>

#include <transaction.h>

// CONSTANTS

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// CLASS DECLARATION

class CItemMini;

class CFolderItem;

class CPackedFolder;

class RFeedsServer;

class CFolderItemRequestHandler;

class CFolderItemRequestHandler;

/**

*  The RFolderItem observer interface.

*

*  \b Library: FeedsEngine.lib

*

*  @since 3.1

*/

class MFolderItemObserver : public MConnectionObserver

    {

    public:  // New Methods

        /**

        * Notifies the observer that the request is completed.

        *

        * @since 3.1

        * @param aStatus The result code of the request.

        * @return void.

        */

        virtual void FolderItemRequestCompleted(TInt aStatus, CRequestHandler::TRequestHandlerType aRequestType=CRequestHandler::ENone) = 0;

        /**

        * Notifies the observer that the FolderItem has changed.  The client

        * should request an updated copy from the server.

        *

        * @since 3.1

        * @return void.

        */

        virtual void FolderItemChanged() = 0;

    };

/**

*  The client side interface to a server resident FolderItem.

*

*  \b Library: FeedsEngine.lib

*

*  @since 3.1

*/

class RFolderItem: public RSubSessionBase, public MRequestHandlerObserver

    {

    public:

        /**

        * C++ default constructor.

        */

        IMPORT_C RFolderItem( MFolderItemObserver& aObserver, TInt aFolderListId = 0, TBool aItemTitleNeed = EFalse );

        public:  // From MRequestHandlerObserver

        virtual void SendAsyncCommand(TInt /*aFunction*/, const TIpcArgs& /*aArgs*/, 

                TRequestStatus& /*aStatus*/) const { } ;

        /**

        * Notifies the observer that the request is completed.

        *

        * @since 3.1

        * @param aRequestHandler The request handler.

        * @param aStatus The result code of the request.

        * @return void.

        */

        virtual void RequestHandlerCompleted(CRequestHandler& /*aRequestHandler*/,

                TInt /*aStatus*/) { } ;

        /**

        *

        */

        virtual void CancelAllCommandsL() { } ;

        /**

        * Request to create a network connection.

        *

        * @since 3.1

        * @param aConnectionPtr A pointer to the new connection. If NULL, the 

        *                       proxy filter will automatically create a network connection.

        * @param aSockSvrHandle A handle to the socket server.

        * @param aNewConn A flag if a new connection was created. If the 

        *                 connection is not new, proxy filter optimization will not 

        *                 read the proxy again from CommsBd.

        * @param aBearerType The bearer type of the new connection

        * @return void

        */

        virtual void NetworkConnectionNeededL(TInt* aConnectionPtr, TInt& aSockSvrHandle,

                TBool& aNewConn, TApBearerType& aBearerType);

    public:  // New methods

        /**

        * Notifies the observer that the request is completed.

        *

        * @since 3.1

        * @param aRequestHandler The request handler.

        * @param aStatus The result code of the request.

        * @return void.

        */

        void RequestHandlerCompletedL(CTransaction& aTrans,

                TInt aStatus);

        /**

        * Opens a session to the root FolderItem on the server.

        *

        * @since 3.1

        * @param aFeedsServer The shared connection to the feeds server.

        * @return Error/success code

        */

        IMPORT_C TInt Open(RFeedsServer &aFeedsServer);

        /**

        * Closes the session.

        *

        * @since 3.1

        * @return void

        */

        IMPORT_C void Close();

        /**

        * Fetches the root FolderItem.  FetchRootFolderItemCompleted

        * is called upon completion.

        *

        * @since 3.1

        * @return void

        */

        IMPORT_C void FetchRootFolderItemL();

        /**

        * Request the feeds server to add a new folder item.

        *

        * @since 3.1

        * @param aName The name of the item.

        * @param aUrl The url of the item.

        * @param aIsFolder True if this is a folder.

        * @param aParent The parent folder.

        * @return void

        */

        IMPORT_C void AddFolderItemL(const TDesC& aName, const TDesC& aUrl,

                TBool aIsFolder, const CFolderItem& aParent);

        /**

        * Request the feeds server to change the folder item.  If this 

        * is a folder then KNullDesC should be passed to the aUrl argument.

        *

        * @since 3.1

        * @param aFolderItem The item to update.

        * @param aTitle The item's title..

        * @param aUrl The item's url or KNullDesC.

        * @return void

        */

        IMPORT_C void ChangeFolderItemL(const CFolderItem& aFolderItem, 

                const TDesC& aTitle, const TDesC& aUrl);

        /**

        * Request the feeds server to delete the folder items 

        *

        * @since 3.1

        * @param aFolderItem The folder item that's being deleted.

        * @return void

        */

        IMPORT_C void DeleteFolderItemsL(RPointerArray<const CFolderItem>& aFolderItems);

        /**

        * Request the feeds server to move the folder item to a different

        * parent. 

        *

        * @since 3.1

        * @param aFolderItem The folder item that's being moved.

        * @param aParent The folder item's new parent.

        * @return void

        */

        IMPORT_C void MoveFolderItemsToL(RPointerArray<const CFolderItem>& aFolderItems,

                const CFolderItem& aParent);

        /**

        * Request the feeds server to move the folder item to a different

        * index. 

        *

        * @since 3.1

        * @param aFolderItem The folder item that's being moved.

        * @param aIndex The new index of the folder item (within its parent).

        * @return void

        */

        IMPORT_C void MoveFolderItemsL(RPointerArray<const CFolderItem>& aFolderItems,

                TInt aIndex);

        /**

        * Request the feeds server to update the folder items (refresh them from the web).  

        *

        * @since 3.1

        * @param aFolderItems The folder items being updated, has to be feed, not folder

        * @return void

        */

        IMPORT_C void UpdateFolderItemsL(const RPointerArray<const CFolderItem>& aFolderItems);

        /**

        * Request the feeds server to update all the folder items (refresh them from 

        * the web) in a current folder-list.  

        *

        * @since 3.1

        * @return void

        */

        IMPORT_C void UpdateAllL();

        /**

        * Sets up a notifier to execute when the folder list changes.

        *

        * @since 3.1

        * @param aFolderListId The folder-list's id.

        * @return void

        */

        IMPORT_C void WatchFolderListL();

        /**

        * Returns ETrue if it has an available root folder.

        *

        * @since 3.1

        * @return Returns ETrue if it has an available root folder..

        */

        IMPORT_C TBool HasRootFolderItem() const;

        /**

        * Once fetched, it returns the root CFolderItem.  This method panics the

        * client if it is called before the folder item is available.

        *

        * @since 3.1

        * @return The root CFolderItem.

        */

        IMPORT_C const CFolderItem& RootFolderItem() const;

        /**

        * Import OPML file passed from the client. 

        *

        * @since 3.2

        * @param aPath The OPML file path.

        * @param aClearFolderList Flag indicating to or not to clear entries under this Folder List before load OPML.

        * @return void.

        */

        IMPORT_C void ImportOPMLL( const TDesC& aPath, TBool aClearFolderList = EFalse );

        /**

        * Request the feeds server to export the folder items 

        *

        * @since 3.2

        * @param aFolderItem The folder item that's being exported.

        * @param aExportFileName The OPML file name.

        * @return void

        */

        IMPORT_C void ExportFolderItemsL(RPointerArray<const CFolderItem>& aFolderItems, const TDesC &aExportFileName);

    public:

        friend class RFeedsServer;

    private:  // Data

        MFolderItemObserver&            iObserver;

        CFolderItem*                    iFolderItem;

        RPointerArray<CFolderItemRequestHandler>  iActiveRequests;

        TInt                            iFolderListId;

        TBool                           iItemTitleNeed;

        RFeedsServer*                   iFeedsServer;

    };

/**

*  FolderItem either contains a list of FolderItems or contains

*  information about a feed.

*

*  \b Library: FeedsEngine.lib

*

*  @since 3.0

*/

class CFolderItem: public CBase

    {

    public:  // Destructor

        /**

        * Destructor.

        */        

        IMPORT_C virtual ~CFolderItem();

    public: // New methods

        /**

        * Returns the folder-list-id associated with this item.

        *

        * @since 3.0

        * @return the folder-list-id associated with this item.

        */

        IMPORT_C TInt FolderListId(void) const;

        /**

        * Returns the parent folder or NULL if this is the root folder.

        *

        * @since 3.0

        * @return The parent folder.

        */

        IMPORT_C const CFolderItem* Parent(void) const;

        /**

        * Returns true if this is a folder.

        *

        * @since 3.0

        * @return true or false.

        */

        IMPORT_C TBool IsFolder(void) const;

        /**

        * Returns the name of the item.

        *

        * @since 3.0

        * @return The item's name.

        */

        IMPORT_C const TDesC& Name(void) const;

        /**

        * Returns the source url of the item.

        *

        * @since 3.0

        * @return The item's source url.

        */

        IMPORT_C const TDesC& SourceUrl(void) const;

        /**

        * Returns the timestamp of the last update.

        *

        * @since 3.1

        * @return The item's timestamp of the last update.

        */

        IMPORT_C const TTime& Timestamp(void) const;

        /**

        * Returns the number of unread topics for this folder-item.

        *

        * @since 3.1

        * @return The number of unread topics for this folder-item.

        */

        IMPORT_C TInt UnreadCount(void) const;

        /**

        * Returns the number of unread feeds for this folder-item.

        *

        * @since 5.0

        * @return The number of unread feeds (those with > 1 unread topics) for

        * this folder item and all folders below it recursively

        */

        IMPORT_C TInt UnreadFeedCountRecursive(void) const;

        /**

        * Returns the number of unread topics for this folder-item.

        *

        * @since 5.0

        * @return The number of unread topics within all feeds for

        * this folder item and all folders below it recursively

        */

        IMPORT_C TInt UnreadTopicCountRecursive(void) const;

        /**

        * Returns the unique id for this folder-item.

        *

        * @since 3.0

        * @return The item's id.

        */

        IMPORT_C TInt Id(void) const;

        /**

        * Returns the associated feed id for this folder-item.  The

        * method panics if the folder-item is a folder (rather than a feed).

        *

        * @since 3.1

        * @return The item's feed id.

        */

        IMPORT_C TInt FeedId(void) const;

        /**

        * Returns the folder-item at the given index

        *

        * @since 3.0

        * @param aIndex The index of the item.

        * @return Returns the item.

        */

        IMPORT_C const CFolderItem* FolderItemAt(TInt aIndex) const;

        /**

        * Returns the index of the given folder-item.

        *

        * @since 3.0

        * @param aItem The item to find

        * @return The item's index or KErrNotFound.

        */

        IMPORT_C TInt Index(const CFolderItem& aItem) const;

        /**

        * Returns the number of items.

        *

        * @since 3.0

        * @return The number of items.

        */

        IMPORT_C TInt FolderItemCount(void) const;

        /**

        * Searches for a FolderItem with the given name.  If "this"

        * isn't a folder it only checks whether or not it matches

        * the given name.  If "this" is a folder it also checks 

        * all embedded items.

        *

        * @since 3.0

        * @param aName The name to search for.

        * @return The matching FolderItem or NULL.

        */

        IMPORT_C const CFolderItem* Search(const TDesC& aName) const;

        /**

        * Searches for a FolderItem with the given id.  If "this"

        * isn't a folder it only checks whether or not it matches

        * the given id.  If "this" is a folder it also checks 

        * all embedded items.

        *

        * @since 3.1

        * @param aFolderItemId The id to search for.

        * @return The matching FolderItem or NULL.

        */

        IMPORT_C const CFolderItem* Search(TInt aFolderItemId) const;

        /**

        * Returns the number of mini items.

        *

        * @since 3.2

        * @return The number of mini items.

        */

        IMPORT_C TInt MiniItemsCount(void) const;

        /**

        * Return The mini item.

        *

        * @since 3.2

        * @return The array of items title.

        */

        IMPORT_C const CItemMini* MiniItemAt( TInt aIndex ) const;

        /**

        * Sets the number of unread topics for this folder-item.

        *

        * @since 3.1

        * Sets The number of unread topics for this folder-item.

        */

        IMPORT_C void SetUnreadCount(TInt aUnreadCount);

        /**

        * Sets the number of unread topics for this folder-item.

        *

        * @since 5.0

        * Returns the Status of Folder item

        */

        IMPORT_C TInt Status() const;

    private:  // New methods

        /**

        * Two-phased constructor.

        * Only called from RFolderItem.  aPackedFolder is adopted by this method.

        */

        static CFolderItem* NewL(TInt aFolderListId, CFeedsEntity* aFeedsEntity);

        /**

        * Two-phased constructor.

        */

        static CFolderItem* NewFolderL( TInt aFolderListId, const TDesC& aTitle, TInt aEntryId, TInt aStatusCode);

        /**

        * Two-phased constructor.

        */

        static CFolderItem* NewFeedL( TInt aFolderListId, const TDesC& aTitle, const TDesC& aUrl, 

                TInt aEntryId, TInt aFeedId, const TTime& aTimestamp, TInt aStatusCode, const TInt& aUnreadCount=0 );

        /**

        * C++ default constructor.  aPackedFolder is adopted by this method. 

        */

        CFolderItem(TInt aFolderListId, CFeedsEntity* aFeedsEntity);

        /**

        * C++ default constructor.

        */

        CFolderItem( TInt aFolderListId );

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();