/*

* 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:  Manages the feed related views and implements the FeedsViewBridge.

*

*/

#ifndef FEEDS_CLIENT_UTILITIES_H

#define FEEDS_CLIENT_UTILITIES_H

// INCLUDES

#include <brctlspecialloadobserver.h>

#include "Preferences.h"

#include "FeedsWaitDialog.h"

#include "FeedsFileSearchAgent.h"

#include "CommonConstants.h"

// CONSTANTS

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

class CAknViewAppUi;

class CEikMenuPane;

class MApiProvider;

class CFeedsFolderView;

class CFeedsTopicView;

class CFeedsFeedView;

class CBrowserGotoPane;

// CLASS DECLARATION

/**

*  Manages the feed related views and implements the FeedsViewBridge.

*  @lib FeedsViewBridge.lib

*  @since 3.1

*/

class CFeedsClientUtilities: public CBase, 

        public MPreferencesObserver,

        public MFeedsWaitDialogListener,

     	public MFeedsFileSearchAgentCallback,

     	public MFeedsApiObserver

    {

    public:  // Constructors and destructor

        static CFeedsClientUtilities* NewL( CAknViewAppUi& aAppUI, MApiProvider& aApiProvider );

        /**

        * Destructor.

        */        

        ~CFeedsClientUtilities();

    public:  // from MPreferencesObserver

        /**

        * Derived classes should implement this method, and act accordingly.

        */

        void HandlePreferencesChangeL( const TPreferencesEvent aEvent,

                                       TPreferencesValues& aValues,

                                       TBrCtlDefs::TBrCtlSettings aSettingType );

    public: //From MFeedsApiObserver

        /**

        * This function is called by CFeedsInterface class whenever

        * request is completed

        * 

        * @param aTrans Pointer to current transaction class

        * @param aEvent event related to this call.

        */

        virtual void RequestCompleted(CTransaction* aTrans,TInt aEvent);

	public:

        /**

        * Request to create a network connection.

        *

        * @since 7.1

        * @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

        */

    	void NetworkConnectionNeededL( TInt* aConnectionPtr, TInt& aSockSvrHandle,

                                       TBool& aNewConn, TApBearerType& aBearerType );

    public:

        /**

        * Set Browser prefs to Feed engine

        * @since 3.1

        * @param aValues Browser preferences       

        * @return void

        */    

        void SetPreferencesToFeedL( const TPreferencesValues& aValues );

        /**

        * Load Url in new window

        *

        * @since 3.1

        * @return void.

        */

    	void LoadUrlL( const TDesC& aUrl );

        /**

        * Shows the folder view, loading the folder list from the FeedsServer if need be.

        *

        * @since 3.1

        * @param aCalledFromView to recored from which view this was invoked. Default value

        *   is BrowserBookmarksViewId if this argument is not specified.

        * @return void.

        */

        void ShowFolderViewL(TUid aCalledFromView = KUidBrowserBookmarksViewId);

        /**

        * Shows the topic view, loading the given feed associated with the given 

        * folder item.

        *

        * @since 3.1

        * @return void.

        */

        void ShowTopicViewL(const CFeedsEntity& aFolderItem);

        /**

        * Shows the folder view and subscribes to the given feed.

        *

        * @since 3.1

        * @param aTitle The feed's title.

        * @param aUrl The feed's url.

        * @return void.

        */

        void SubscribeToL(const TDesC& aTitle, const TDesC& aUrl);

        /**

        * Returns the feed related mime-types.  This makes 

        * for a clean way to pass downloaded feeds content from the client to the FeedsServer 

        * (via CFeedsClientUtilities::HandleFeedL).

        *

        * @since 3.1

        * @return An array of supported mime-types.

        */

        TPtrC SupportedMimeTypesL();

        /**

        * Returns Feeds Server related settings.

        *

        * @since 3.1

        * @return Feeds Server related settings.

        */

        TInt FeedsServerSettingsL(TFeedsServerSetting& aSetting);

        /**

        * Sets Feeds Server related settings.

        *

        * @since 3.1

        * @param aNewSettings The new settings.

        * @return void.

        */

        void SetFeedsServerSettingsL(const TFeedsServerSetting& aNewSetting);

        /**

        * Sets a Browser Control related settings.  These settings are directly passed to all 

        * Browser Control instances used by the CFeedsViewBridge.  As such see the Browser

        * Control documentation for infomation about the settings.

        *

        * @since 3.1

        * @param aSetting The setting to update

        * @param aValue The new value of the setting

        * @return void.

        */

        void SetBrowserControlSettingL(TUint aSetting, TUint aValue);

        /**

        * Called by RequestHandlerCompleted when the root FolderItem is either ready or an error occured.

        *

        * @since 3.1

        * @param aStatus The result code of the FetchRootFolderItemL method.

        * @param aTrans The type of transaction that was made

        * @return void.

        */

        void FolderItemRequestCompleted(TInt aStatus, CTransaction::TTransactionType aTrans=CTransaction::ENone);

        /**

        * Leaving method which is called by FolderItemRequestCompleted

        *

        * @since 3.2

        * @param aStatus The result code of the FetchRootFolderItemL method.

        * @param aTrans The type of transaction that was made

        * @return void.

        */

        void FolderItemRequestCompletedL(TInt aStatus, CTransaction::TTransactionType aTransType=CTransaction::ENone);

        /**

        * Called by RequestHandlerCompleted when the FolderItem has changed.  The client

        * should request an updated copy from the server.

        *

        * @since 3.1

        * @return void.

        */

        void FolderItemChanged() {};

        /**

        * Called by RequestHandlerCompleted when the asynchronous request is complete.

        *

        * @since 3.1

        * @pram aStatus The completion status code.

        * @return void.

        */

        void FeedRequestCompleted(TInt aStatus);

        /**

        * Leaving method which is called from FeedRequestCompleted

        *

        * @since 3.2

        * @pram aStatus The completion status code.

        * @return void.

        */

        void FeedRequestCompletedL(TInt aStatus);

        /**

        * Notifies the observer that the feed has changed.  This method is called

        * when the feed is updated by the feeds server.

        *

        * @since 3.1

        * @return void.

        */

        void FeedChanged() {};

        /**

        * Notifies the observer that the feed's item status has changed.  

        * This method is called when __another__ client updates the feed's 

        * item status (via UpdateFeedItemStatusL).

        *

        * @since 3.1

        * @return void.

        */

        void FeedItemStatusChanged() {};

    public:  // From MWaitDialogListener

        /**

        * Called when the user presses the cancel button.

        *

        * @since 3.0

        * @return void.

        */

        void DialogDismissedL();

    public:  // New Methods.

        /**

        * 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 7.1

        * @param aName The title of the feed

        * @param aFolder The folder to be searched

        * @return void.

        */

        const CFeedsEntity* Search(const TDesC& aName,const CFeedsEntity& aFolder) 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 7.1

        * @param aFolderItemId The id of the folder item.

        * @param aFolder The folder to be searched

        * @return void.

        */

    	const CFeedsEntity* Search(TInt aFolderItemId,const CFeedsEntity& aFolder) const;

        /**

        * Get the root folder from the Feeds server.

        *

        * @since 3.1

        * @return void.

        */

        void FetchRootFolderL();

        /**

        * Add a new folder item.

        *

        * @since 3.1

        * @param aTitle The title of the item.

        * @param aUrl The url of the item.

        * @param aIsFolder True if this is a folder.

        * @param aParent The parent folder.

        * @param aFreq The frequency for auto updating.

        * @return void.

        */

        void AddFolderItemL(const TDesC& aTitle, const TDesC& aUrl,

                TBool aIsFolder, const CFeedsEntity& aParent, TInt aFreq);

        /**

        * 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.

        * @param aFreq The frequency for auto updating.

        * @return void

        */

        void ChangeFolderItemL(CFeedsEntity& aFolderItem, 

                const TDesC& aTitle, const TDesC& aUrl, TInt aFreq);

        /**

        * Delete the folder items. 

        *

        * @since 3.1

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

        * @return void

        */

        void DeleteFolderItemsL(RPointerArray<const CFeedsEntity>& aFolderItems);

        /**

        * Move the folder items 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

        */

        void MoveFolderItemsToL(RPointerArray<const CFeedsEntity>& aFolderItems,

                const CFeedsEntity& aParent);

        /**

        * 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

        */

        void MoveFolderItemsL(RPointerArray<const CFeedsEntity>& aFolderItems,

                TInt aIndex);

        /**

        * Get the given feed from the Feeds server.

        *

        * @since 3.1

        * @param aFeedUrl The id of the feed to fetch.

        * @param aForceUpdate When true the server will ignore the cache.

        * @param aNoCache When true the server will not cache the feed.

        * @return void.

        */

        void FetchFeedL(const CFeedsEntity& aFeedEntity, TBool aForceUpdate = EFalse, 

                TBool aNoCache = EFalse);

        /**

        * Updates the feed with the given id.

        *

        * @since 3.1

        * @param aFeedId The id of the feed to update.

        * @return void.

        */

        void UpdateFeedL(const CFeedsEntity& aFeedEntity);

        /**

        * Updates the given feeds in the background.

        *

        * @since 3.1

        * @param aFolderItems The feeds to update.

        * @return void.

        */

        void UpdateFolderItemsL(const RPointerArray<const CFeedsEntity>& 

                aFolderItems);

        /**

        * Updates all of feeds in the background.

        *

        * @since 3.1

        * @return void.

        */

        void UpdateFolderItemsL();

		/**

		* Handle the menu "Import Feeds" command. This will kick off the search

		* for OMPL feeds files stored on the phone. Control will return via the 

		* FeedsFileSearchComplete callback.

		*

		* @since 3.2

		* @return void.

		*/

		void ImportFeedsL();

		/**

		* Given a filepath on the filesystem, begin import feeds from the file path

		* This will set up the path and flags and allow the feeds folder to be 

		* activated before the import actually takes place.

		*

		* @since 3.2

		* @return void

		* @param a filesystem path to import from

		*/

		void BeginImportOPMLFeedsFileL( TFileName& aFilepath );

		/**

		* Handle the menu "Export Feeds" command

		* once items have been selected and a name chosen.

		*

		* @since 3.2

		* @return void

		* @param folder items to export and a name to export to

		*/

		void ExportFeedsL(RPointerArray<const CFeedsEntity>& aFolderItems, const TDesC &aExportFileName);

        /**

        * Shows the folder view.

        *

        * @since 3.1

        * @return void.

        */

        void ShowFolderViewLocalL();

        /**

        * Shows the topic view.

        *

        * @since 3.1

        * @param aInitialItem The initial item to show.

        * @return void.

        */

        void ShowTopicViewLocalL(TInt aInitialItem);

        /**

        * Shows the feed view.

        *

        * @since 3.1

        * @param aInitialItem The initial item to show.

        * @return void.

        */

        void ShowFeedViewLocalL(TInt aInitialItem);

        /**

        * Returns the current root folder.

        *

        * @since 3.1

        * @return The current root folder..

        */

        const CFeedsEntity* CurrentRootFolder() ;        

        /**

        * Returns the current feed.

        *

        * @since 3.1

        * @return The current feed.

        */

        CFeedsEntity* CurrentFeed() ; 

        /**

        * Add a menu item to the given menu.

        *

        * @since 3.1

        * @param aMenuPane The menu to add the item to.

        * @param aCommand The item's command.

        * @param aTitleId The item's title resouce-id.

        * @return void.

        */

        void AddItemL(CEikMenuPane& aMenuPane, TInt aCommand, TInt aTitleId);

        /**

        * Add a sub-menu to the given menu.

        *

        * @since 3.1

        * @param aMenuPane The menu to add the item to.

        * @param aCommand The cascade's command.

        * @param aTitleId The item's title resouce-id.

        * @param aCascade The cascade's resource id.

        * @return void.

        */

        void AddCascadeL(CEikMenuPane& aMenuPane, TInt aCommand, 

                TInt aTitleId, TInt aCascade);

        /**

        * Sets the item's status (read/unread/new).

        *

        * @since 3.1

        * @param aItemIndex The index of the item to change.

        * @param aStatus The new status.

        * @return void.

        */

        void SetItemStatusL(CFeedsEntity* aItem, TFeedItemStatus aStatus);

        /**

        * Returns the item's status (read/unread/new).

        *

        * @since 3.1

        * @param aItemIndex The index of the item to change.

        * @return The status.

        */

        TFeedItemStatus ItemStatus(TInt aItemIndex);

        /**

        * Writes the item status out to the server.

        *

        * @since 3.1

        * @return Void.

        */

        void ItemStatusWriteToServerL();