/*

* Copyright (c) 2009 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:  Manages installed widgets information

*

*/

#include <QDir>

#include <QPluginLoader>

#include <QDebug>

#include "hswidgetregistryservice.h"

#include "hswidgetregistryservice_p.h"

#include "hswidgetprovidermanifest.h"

#include "servicefinder.h"

const char POSTERURI[] = "homescreen.nokia.com/widget/poster/";

const char POSTERWIDGETNAME[] = "name";

const char POSTERWIDGETID[] = "posterwidgetid";

const char PUBLISHER[] = "publisher";

const char TEMPLATETYPE[] = "templatetype";

const char CONTENTID[] = "contentid";

const char CONTENTTYPE[] = "contenttype";

/*!

    ?Qt_style_documentation

*/

HsWidgetRegistryServicePrivate::HsWidgetRegistryServicePrivate(

    const QString& installationPath, HsWidgetRegistryService* ptrToPublic,

    QObject* parent) : QObject(parent)

{

    Q_UNUSED(ptrToPublic);

    QStringList manifestPaths;

    this->mInstallationPath = installationPath;

    QDir currentDir = QDir::current();

    QString currentPath = currentDir.absolutePath();

    //Check widget installation dirs from root of different drives

    QFileInfoList drives = QDir::drives();

    // ?

    for(int i=0; i < drives.count(); i++) {

        QFileInfo drive = drives.at(i);

        QString driveLetter = drive.absolutePath();

        QString path = currentPath + "/" + mInstallationPath;

        QDir registryDir(path);

        if(registryDir.exists()) {

            // ?

            mManifestDirectories[path] = readManifestDirectories(path);

        }

    }

}

/*!

    ?Qt_style_documentation

*/

HsWidgetRegistryServicePrivate::~HsWidgetRegistryServicePrivate()

{

}

/*!

    ?Qt_style_documentation

*/

QList<HsWidgetToken> HsWidgetRegistryServicePrivate::widgets() {

   QList<HsWidgetToken> widgets; 

   QMapIterator<QString, QStringList> i(mManifestDirectories);

   while (i.hasNext()) {

        i.next();

        QStringList manifestFileList = i.value();

        QDir manifestDir(i.key());

		// ?

        for(int h=0; h < manifestFileList.count(); h++) {

            widgets << readManifestFile(manifestDir.absoluteFilePath(manifestFileList.at(h)));

        }

    }

    return widgets;

}

/*!

    ?Qt_style_documentation

*/

IHsWidgetProvider* HsWidgetRegistryServicePrivate::loadProviderFromPlugin(

        const QString& pluginName)

{   

    QPluginLoader loader(pluginName);

    QObject *plugin = loader.instance();

    IHsWidgetProvider *provider = qobject_cast<IHsWidgetProvider *>(plugin);

    if (provider) {

		// ?

        return provider;

    }

    // Don't leak memory if provider not IHsWidgetProvider

    if (plugin) {

        //qDebug("Widget provider load - !provider, deleting plugin.")

        delete plugin;

    }

    // qDebug("Widget provider load failed - Not found.")

    return 0;

}

/*!

    ?Qt_style_documentation

*/

QStringList HsWidgetRegistryServicePrivate::readManifestDirectories(const QString &path)

{

    QStringList widgetDirPaths;

    QDir registryDir(path);

    QStringList widgetDirs = registryDir.entryList(QDir::AllDirs); 

	// ?

	for (int i=0; i < widgetDirs.count(); ++i) {

        widgetDirPaths << registryDir.absoluteFilePath(widgetDirs.at(i));

    }

    return widgetDirPaths;

}

/*!

    ?Qt_style_documentation

*/

void HsWidgetRegistryServicePrivate::doWidgetRemove(const QString &path, 

    const QStringList &originalList, const QStringList &currentList)

{

    Q_UNUSED(path);

    const int originalCount = originalList.count();

    // ?

    for (int i=0; i<originalCount; i++) {

        QString widgetDir = originalList.at(i);

        if (!currentList.contains(widgetDir)) {

            // ?

            QDir dir(widgetDir);

            int widgetUid = dir.dirName().toUInt(0, 16);

            mPublic->emitWidgetRemovedFromRegistry(widgetUid);

        }

    }

}

/*!

    ?Qt_style_documentation

*/

QList<HsWidgetToken> HsWidgetRegistryServicePrivate::readManifestFile(

    const QString &manifestFilePath)

{

    QList<HsWidgetToken> widgets;

    HsWidgetProviderManifest manifest;

    QStringList filters("*.manifest");

    QDir dir(manifestFilePath);

    QStringList manifestDir = dir.entryList(filters, QDir::Files);

    if (!manifestDir.isEmpty()) {

		// ?

        QString fileName = manifestDir.first();

        if (fileName != "hsposterwidgetprovider.manifest") {

            // Directory differs from the poster widget's directory

            // which is not supported for the time being.

            manifest.loadFromXml(dir.absoluteFilePath(fileName));

            widgets = manifest.widgets();

            int widgetUid = dir.dirName().toUInt(0, 16);

		    // ?

            for (int i=0; i<widgets.count();i++) {

                widgets[i].mUid = widgetUid;

                widgets[i].mLibrary = manifestFilePath + "/" + widgets[i].mLibrary;

                if (widgets[i].mIconUri != "") {

				    // ?

                    widgets[i].mIconUri = manifestFilePath + "/" + widgets[i].mIconUri;

                }

            }

            qDebug() << "HsWidgetRegistryServicePrivate::readManifestFile - " \

                "widget added: " << fileName;

        }

    }

    return widgets;

}

/*!

    ?Qt_style_documentation

*/

void HsWidgetRegistryServicePrivate::ensureWidgetRegistryPaths()

{

    /*

    mFileSystemWatcher.disconnect();

    QStringList pathList = mManifestDirectories.keys();

	// ?

    for(int i=0; i < pathList.count(); i++) {

        QDir registryDir(pathList.at(i));

		if(!registryDir.exists()) {

			// ?

            registryDir.mkpath(pathList.at(i));

        }

    }

    mFileSystemWatcher.removePaths(QStringList(mManifestDirectories.keys()));

    mFileSystemWatcher.addPaths(QStringList(mManifestDirectories.keys()));

    connect(&mFileSystemWatcher,SIGNAL(directoryChanged(const QString&)),SLOT(directoryChanged(const QString&)));

    */

}

/*!

    ?Qt_style_documentation

*/

void HsWidgetRegistryServicePrivate::directoryChanged(const QString &path)

{

    Q_UNUSED(path);

    /*

	int installationStatus = mInstallerObserver.value();

    if ((installationStatus & KSASwisOperationMask) == ESASwisNone) {

	    // ?

        QStringList originalList = mManifestDirectories.value(path);

        QStringList currentList = readManifestDirectories(path);

        doWidgetAdd(path, originalList, currentList);

        doWidgetRemove(path, originalList, currentList);

        mManifestDirectories[path] = currentList;

        ensureWidgetRegistryPaths();

    } else {

	    // ?

        mFileSystemWatcher.disconnect();

        connect(&mInstallerObserver,SIGNAL(valueChanged(int)),SLOT(installerStateChanged(int)));

        mInstallerObserver.subscribe();

        mLatestChangedDirectory = path;

    }

	*/

}

/*!

    ?Qt_style_documentation

*/

void HsWidgetRegistryServicePrivate::installerStateChanged(int newValue)

{

    Q_UNUSED(newValue);

	/*

    if ((newValue & KSASwisOperationMask) == ESASwisNone) {

		// ?

        mInstallerObserver.unSubscribe();

        mInstallerObserver.disconnect();

        QStringList originalList = mManifestDirectories.value(mLatestChangedDirectory);

        QStringList currentList = readManifestDirectories(mLatestChangedDirectory);

        doWidgetAdd(mLatestChangedDirectory, originalList, currentList);

        doWidgetRemove(mLatestChangedDirectory, originalList, currentList);

        connect(&mFileSystemWatcher,SIGNAL(directoryChanged(const QString&)),SLOT(directoryChanged(const QString&)));

        mManifestDirectories[mLatestChangedDirectory] = currentList;

        ensureWidgetRegistryPaths();

    }

	*/

}

/*!

    \class HsWidgetRegistryService

    \ingroup group_hsruntimeservices

    \brief Manages installed widgets information

    Manages information on available widgets and inform observers on 

    registry modifications, i.e installing and uninstalling widgets.

*/

/*!

    Constructor.

    \a installationPath is the path where the widget is installed

    and the \a parent is the parent object.

*/ 

HsWidgetRegistryService::HsWidgetRegistryService(

    const QString& installationPath,

    QObject* parent)

    :QObject(parent),

    mPrivate(new HsWidgetRegistryServicePrivate(installationPath, this, this))

{

}

/*!

    Destructor.

*/  

HsWidgetRegistryService::~HsWidgetRegistryService()

{

}

/*!

    Fetch available widgets information

    Return List of widget tokens.

*/   

QList<HsWidgetToken> HsWidgetRegistryService::widgets()

{

 return mPrivate->widgets();

}

/*!

    \fn HsWidgetRegistryService::widgetAddedToRegistry(const QList<HsWidgetToken> &widgetTokenList);

    Emitted when new widgets are added to registry. \a widgetTokenList

    contains list of widget tokens.

*/  

/*!

    \fn HsWidgetRegistryService::widgetRemovedFromRegistry(int uid)

    Emitted when a widget is removed from registry    

*/   

/*!

    \fn HsWidgetRegistryService::posterWidgetRemovedFromRegistry(int posterWidgetId)

    Emitted when a poster widget publisher is removed from cps    

    \a posterWidgetId Poster widget id.

*/   

/*!

    Emits the widgetAddedToRegistry() signal

    \a widgetsAdded Identifies the added widgets.

*/   

void HsWidgetRegistryService::emitWidgetAddedToRegistry(const QList<HsWidgetToken> &widgetsAdded)

{

    emit widgetAddedToRegistry(widgetsAdded);

}

/*!

    Emits the widgetRemovedFromRegistry() signal

    \a uid HsWidget uid.

*/   

void HsWidgetRegistryService::emitWidgetRemovedFromRegistry(int uid)

{

    emit widgetRemovedFromRegistry(uid);

}