/*

* Copyright (c) 2008 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:  

*

*  Utility for common code.

*

*

*/

#ifndef __hspsSERVERUTIL_H__

#define __hspsSERVERUTIL_H__

// Includes

#include <e32def.h> 

#include <e32base.h>

// Forward declarations.

class ChspsODT;

class ChspsDomNode;

class ChspsResource;

// Constants.

#define RECURSION_DEPTH_INFINITE (-1)

/**

*  Class hspsAttribUtil.

*

*  Static utility for maintainance and installation handlers.

*  @ingroup group_hspsserver

*  @lib hspsThemeServer.exe

*/

class hspsServerUtil

    {

    public: // New methods.

        /**

         * Generates attributes for the Configuration element from manifest data

         * @since S60 5.0

         * @param aOdt is an ODT instance to be updated

         */

        static void GenerateConfigurationAttributesL( ChspsODT& aOdt );

        /**

         * Generates attributes for the Object element from manifest data

         * @since S60 5.0

         * @param aOdt is an ODT instance to be updated

         */

        static void  GenerateObjectAttributesL( ChspsODT& aOdt );       

        /**

         * Retrieves locale independent path which used by HSPS clients to access resources

         * in their private application folders.

         * @since S60 5.0

         * @param aResourceLanguage is the language of the resource

         * @param aPath is the path to be unlocalized                 

         */

        static void GetLocaleIndependentResourcePath(

        		const TLanguage& aResourceLanguage,

        		TFileName& aPath );        

        /**

         * Retrieves relative path of a resource under the themes folder.         

         * @since S60 5.0

         * @param aSourceFile is the input file 

         * @param aRelativePath is the relative path                 

         */

        static void GetRelativeResourcePath(

                const TFileName& aSourceFile,

                TPath& aRelativePath );

        /**

         * Creates a new attribute for the provided plugin node. 

         * @since S60 5.0

         * @param aPluginsNode is the plugins node that should be modified

         * @param aAttrName is name of the attribute

         * @param aValue is value of the attribute

         * @param aFormat is requested value string format

         * @return KErrNone

         */

        static TInt AddAttributeNumericL(

            ChspsDomNode& aNode,

            const TDesC8& aAttrName, 

            const TInt aValue,

            const TRadix aFormat = EDecimal );

        /**

         * Creates a new attribute for the provided plugin node. 

         * @since S60 5.0

         * @param aPluginsNode is the plugins node that should be modified

         * @param aAttrName is name of the attribute

         * @param aValue is value of the attribute

         */

        static void AddAttributeDescL(

            ChspsDomNode& aNode,

            const TDesC8& aAttrName, 

            const TDesC8& aValue );        

        /**

         * Finds a configuration node with the provided id attribute

         * @since S60 5.0

         * @param aOdt is an instance of the ODT class  

         * @param aConfigurationId is an unique identifier of the configuration node

         * @return plugins node or NULL if the node couldn't be found 

         */

        static ChspsDomNode* FindConfigurationNodeL(

    		    ChspsODT& aOdt,		

    		    const TInt aConfigurationId );

        /**

         * Finds a plugin node with the provided id

         * @since S60 5.0

         * @param aOdt is an instance of the ODT class      

         * @param aPluginId is an ID of the plugin instance to be found

         * @return Pointer to the plugin node or NULL

         */

        static ChspsDomNode* FindPluginNodeL(

    		    ChspsODT& aOdt,		

    		    const TInt aPluginId );

        /**

         * Gets an attribute value of a configuration element.

         * @since S60 5.0

         * @param aOdt is an ODT instance form which the name is fetched

         * @param aAttr is the attribute to be found

         * @return value of the name attribute in a configuration node         

         */

        static TPtrC8 FindConfigurationAttrL( 

            const ChspsODT& aOdt,

            const TDesC8& aAttr );

        /**

         * Copies a file to a target path when neccessary.

         * Target path is created if it's missing.

         * File is copied if the target's size or date are different or 

         * if the file is missing.

         * @since S60 5.0 

         * @param aFs           Reference to OPEN file server session handle.

         * @param aFilemanager  Referemce to file manager instance

         * @param aTargetPath   Path where the file should be copied to

         * @param aFilename     Path and name of the file to be copied

         * @return error code

         */

        static TInt CopyResourceFileL(

                RFs& aFs,

                CFileMan& aFilemanager,

                const TPath& aTargetPath,

                const TFileName& aSourceFile );

        /**

         * Checks:

         * - Is there enough space for target file?

         * - Do source and target files have same timestamp and size

         *   (if target file exists)?

         * 

         *  @param  aSource     Full path to source file.

         *  @param  aTarget     Full path to target file.

         *  @param  aFs         Reference to OPEN file server session handle.

         *  @return TBool       ETrue if copy can continue, EFalse if copy not needed.

         */

        static TBool ResourceCopyIsRelevantL( 

        		const TDesC& aSource,

                const TDesC& aTarget,

                RFs& aFs );

        /**

         * Check configuration states

         * @since S60 5.0

         * @param aOdt        ODT instance to be checked

         * @param aConfState     Old state to be replaced

         * @param aNextConfState New state         

         * @param aOdtUpdated ODT update status

         */

        static void UpdateConfigurationStateL( 

            ChspsODT& aOdt,

            TDesC8& aConfState,

            TDesC8& aNextConfState,

            TBool& aOdtUpdated );

        /**

         * Check state of an application configuration

         * @since S60 5.0

         * @param aOdt        ODT instance to be checked

         * @param aConfState     Old state to be replaced

         * @param aNextConfState New state         

         */

        static void UpdateAppConfigurationStateL( 

            ChspsODT& aAppOdt,

            const TDesC8& aConfState,

            const TDesC8& aNextConfState );

        /**

         * Finds a defined node with defined attribute value

         * @since S60 5.0

         * @param aOdt is an instance of the ODT class

         * @param aAttrName is name of the attribute to be found

         * @param aAttrValue is the value which the attribute should hold 

         */

        static ChspsDomNode* FindNodeByAttributeL( 

            ChspsODT& aOdt,

            const TDesC8& aNodeName,

            const TDesC8& aAttrName, 

            const TDesC8& aAttrValue );

        /**         

         * Retrieves all unique plugin uids from a configuration.

         * @since S60 5.0

         * @param aOdt holds the configuration from which the plugins are searched from

         * @param aPluginArray is an array of found plugin uids         

         */

        static void FindUniquePluginsL( 

                ChspsODT& aOdt, 

                RArray<TInt>& aPluginArray );

        /**

         * Converts a hex value string (0xXXXX) to TUint.

         * 

         * @param aStr  String containing hex value.

         * @param aTrg  Reference to target TUint. Will be modified only

         *              if conversion is successful.

         * @return      KErrNone if successfull. Otherwise related symbian error code.

         */

        static TInt HexString2Uint(

                    const TDesC8& aStr,

                    TUint& aTrg );

        /**

         * Converts a decimal value string to TInt

         * @param aStr String containing hex value

         * @return corresponding TInt

         */

        static TInt DecString2Int(

                      const TDesC8& aStr );

        /**

         * Returns a count of plugin instances.

         * @since S60 5.0

         * @param aAppODT is an instance of the the application configuration         

         * @param aPluginUid is an UID of the plugin instances to be found

         * @param aInstanceCount is the return value         

         */

        static void PluginInstanceCountL(

                        const ChspsODT& aAppODT,        

                        const TInt aPluginUid,

                        TInt& aInstanceCount );

        /**

         * Converts UID in DesC8 format into TUid format.

         * @since S60 5.0

         * @param aStr is the descriptor value to be converted

         * @return the converted uid value

         */

        static TUid ConvertDescIntoUid(

                const TDesC8& aStr );

        /**

         * Finds a child node by tag 

         * @since S60 5.0

         * @param aNodeTag is the tag of the child node to be found

         * @param aParentNode is the node whose child is searched

         * @param aIndex is index that sets position where to start search

         * @return pointer to child node

         */

        static ChspsDomNode* FindChildNodeByTagL(

                const TDesC8& aNodeTag, 

                ChspsDomNode& aParentNode,

                TInt& aIndex );

        /**

         * Returns fixed name of ODT resources (e.g. clock.o0005 name converts into clock.o0000)

         * @since S60 5.0

         * @param aNameAndExtension is resource name to be fixed

         * @return fixed resource name  

         */

        static TFileName GetFixedOdtName( 

                const TDesC& aNameAndExtension );

        /**

         * Finds files from defined directory and its sub directories from

         * C: drive, Z: drive or both. If the directory path contains a drive 

         * files are searched from that drive only.          

         * @since S60 5.0

         * @param aDirName is directory path where the files are searched

         * @param aFileName is name of file to be searched

         * @param aFiles is a list of found files (full path)

         */

        static void FindFilesL( 

                const TDesC& aDirName,

                const TDesC& aFileName,

                RArray <TFileName>& aFiles );

        /**

         * Finds files from defined directory from C: drive, Z: drive or both. 

         * If the directory path contains a drive files are searched from that 

         * drive only.          

         * @since S60 5.0

         * @param aDirName is directory path where the files are searched

         * @param aFileName is name of file to be searched

         * @param aFiles is a list of found files (full path)

         */

        static void FindFilesFromDirL( 

                const TDesC& aDirName,

                const TDesC& aFileName,

                RArray <TFileName>& aFiles );

        /**

         * Set node attribute value. Updated node is defined with 

         * node name, attribute name and attribute value

         * @since S60 5.0

         * @param aOdt is an instance of the ODT class

         * @param aNodeName is name of updated node

         * @param aAttrName is name of the attribute to be found

         * @param aAttrValue is the value which the attribute should hold

         * @param aSetAttrName is name of updated attribute

         * @param aSetAttrValue is new value of updated attribute 

         */

        static void SetAttributeValueL( 

            const ChspsODT& aOdt,

            const TDesC8& aNodeName,

            const TDesC8& aAttrName, 

            const TDesC8& aAttrValue,

            const TDesC8& aSetAttrName,

            const TDesC8& aSetAttrValue );

        /**

         * Get node attribute value. Node which attribute value is requested 

         * is defined with node name, attribute name and attribute value

         * @since S60 5.0

         * @param aOdt is an instance of the ODT class

         * @param aNodeName is the name of node which attribute value is requested

         * @param aAttrName is the name of the attribute which should be contained by the node

         * @param aAttrValue is the requested value of the attribute

         * @param aGetAttrName is the name of attribute which value is requested

         * @param aGetAttrValue is the requested attribute value

         */

        static void GetAttributeValueL( 

            const ChspsODT& aOdt,

            const TDesC8& aNodeName,

            const TDesC8& aAttrName, 

            const TDesC8& aAttrValue,

            const TDesC8& aGetAttrName,

            TPtrC8& aGetAttrValue );

        /**

         * Checks resource files of defined configuration

         * Function leaves if all resource files cannot be found

         * @since S60 5.0

         * @param aOdt is an instance of the ODT class

         * @param aConfUid is configuration UID which resources are checked

         */

        static void CheckResourceFilesL( 

            const ChspsODT& aOdt,

            const TInt aConfUid );

        /**

         * Returns configuration's version string

         * Function leaves if configuration cannot be found

         * @since S60 5.0

         * @param aOdt is an instance of the ODT class

         * @param aConfUid is configuration UID which version is requested

         * @param aVersion is configuration version string

         */

        static  void CheckConfigurationVersionL( 

            ChspsODT& aOdt,

            const TInt aConfUid,

            const TDesC& aVersion );

        /**

         * Edit mode for EditNodeActivity method.

         */

        enum TNodeEditMode

            {

            EActivateFirst = 0, // Activate first one on specific level only.

                                // Others will be deactivated.

            EDeactivateAll      // Deactivate all.            

            };                

        /**

         * Modify node's childs according to given edit mode.

         * Recursive method. Modifies only nodes that are type plugin.

         * 

         * @since S60 5.0

         * @param aRootNode     Root node to start tree recursion.

         * @param aEditMode     Edit mode. Look for TNodeEditMode.

         * @param aDepth        Optional edit depth. e.g. If 1 then

         *                      only one level of child nodes is processed.

         *                      If not defined (or RECURSION_DEPTH_INFINITE

         *                      used) then whole node tree from aRootNode

         *                      forward will be processed.

         */

        static void EditPluginNodeActivityL( ChspsDomNode* aRootNode,

                                             const TNodeEditMode aEditMode,

                                             TInt aDepth = RECURSION_DEPTH_INFINITE );         

        /**

         * Get active plugin node.

         * Not recursive method. Only one level from parent will be checked.

         * 

         * @since S60 5.0

         * @param aParentNode   Parent node.

         * @return ChspsDomNode* Pointer to active plugin node. NULL if none found.

         */

        static ChspsDomNode* GetActivePluginNode( ChspsDomNode* aParentNode );        

        /**

         * Get plugin id of a node.

         * 

         * @since S60 5.0

         * @param aNode     Node.

         * @return TInt     Plugin id.

         */

        static TInt GetPluginId( ChspsDomNode* aNode );          

        /**

         * Get plugin uid of a node.

         * 

         * @since S60 5.0

         * @param   aNode   Node.

         * @return  TUid    Plugin uid.       

         */

        static TUid GetPluginUid( ChspsDomNode* aNode );       

        /**

         * Gather plugin ids for specific plugin uid from given ODT.

         * @since S60 5.0

         * @param aAppODT       ODT to search plugin ids from.

         * @param aPluginUid    Plugin uid to be used as search keyword.

         * @param aPluginIds    Target array for plugin ids.

         */

        static void GetPluginIdsByUidL(

            const ChspsODT& aAppODT,

            const TUid aPluginUid,

            RArray<TInt>& aPluginIds );        

        /**

         * Finds a parent node with defined name and attribute 

         * for defined child node

         * @since S60 5.0

         * @param aNode        Child node

         * @param aNodeName    Name of parent node

         * @param aAttrName    Name of parent node attribute

         * @param aAttrValue   Value of parent node attribute

         * @return pointer to parent node or 

         *         NULL if defined parent node is not found

         */

        static ChspsDomNode* GetParentNode(

            const ChspsDomNode& aNode,

            const TDesC8& aNodeName,

            const TDesC8& aAttrName,

            const TDesC8& aAttrValue );        

        /**

         * Retrieves a filename from a file declaration.

         * @since S60 5.1

         * @param aFileDeclaration "SKIN():MIF()", "MIF()", "UID()" or "file.ext" string

         * @param aFilename Referred file name or NULL

 		 * @return True if a file was referred from the declaration

         */

        static TBool hspsServerUtil::IsFile(

                const TDesC& aFileDeclaration,

                TFileName& aFilename );

        /**

         * Resolve resource files that need to be copied.

         * 

         * @since S60 5.1

         * 

         * @param aODT              Configuration.

         * @param aConfUid          Plugin which is to be processed.

         * @param aActiveLanguage   Active language.

         * @param aWidgetResources  Target array. Will receive list

         *                          of resources if any applicable.

         *                          Ownership of given resources is not transferred!

         */

        static void GetValidResourcesL(

                ChspsODT& aODT,        

                const TInt aConfUid,

                const TLanguage aActiveLanguage,

                RPointerArray<ChspsResource>& aWidgetResources );        

        /**

         * Check if there is enough space on given drive for resources included in ODT.

         * 

         * @since   S60 5.1

         * 

         * @param   aODT                    Configuration.

         * @param   aActiveLanguage         Active language.

         * @param   aFs                     Reference to open file server handle.

         * @param   aDriveNumber            Drive number. Default EDriveC.

         * @param   aAdditionalDiskSpace    Additional disk space added to disk (bytes)

         *                                  space requirement. Default 0.

         * 

         * @return  TInt                    System wide error code. KErrDiskFull

         *                                  if not enough space on C drive.  

         */

        static TInt EnoughDiskSpaceAvailableL(

                ChspsODT& aODT,        

                const TLanguage aActiveLanguage,

                RFs& aFs,

                const TDriveNumber aDriveNumber = EDriveC,

                const TInt aAdditionalDiskSpace = 0 );

		/**

         * Finds a node by tag 

         * @since S60 5.0

         * @param aNodeTag is the tag of the node to be found

         * @param aDomNode is the root node where to search specific node 

         * @return pointer to node that is found

         */		

	    static ChspsDomNode* FindNodeByTagL( 

                        const TDesC8& aNodeTag,

                        ChspsDomNode& aDomNode );	

	private:

        /**

         * Internal method. Do not call directly!