/*

* Copyright (c) 2010 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:  Helper application for uninstalling a java application and

*    then installing new application (java or native)

*

*/

#include <apgcli.h>

#include <apacmdln.h>

#include <apmstd.h>

#include <bacline.h>

#include <e32cmn.h>

#include <s32mem.h>

#include <unistd.h>

#include "exceptionbase.h"

#include "javaoslayer.h"

#include "javacommonutils.h"

#include "javaprocessconstants.h"

#include "javasymbianoslayer.h"

#include "javauids.h"

#include "logger.h"

using namespace java::util;

_LIT8(KHexValueStart, "0x");

_LIT8(KSemiColon, ";");

_LIT8(KUidArg, "uid=");

_LIT8(KFileArg, "file=");

const TInt KExtraLenForLogging = 2;

const TInt KArgumentValueMaxLen = 1568;

// Wait for 0.5 sec if ArcApp has not yet initialized

const TInt KDelayWhenWaitingAppArc = 500000;

/**

 * Set the value of the argument specified by aArgName to aArgValue

 *

 * @param aCmdLine command line to be parsed

 * @param aArgName the name of the argument

 * @param aArgValue the value parsed from command line will be returned here

 */

static void getArgValueL(const TPtrC8 &aCmdLine, const TDesC8 &aArgName, HBufC **aArgValue)

{

    TBuf8<KArgumentValueMaxLen> valueBuf;

    TInt argPos = aCmdLine.FindF(aArgName);

    if (argPos >= 0)

    {

        TInt semicolonPos = aCmdLine.Mid(argPos).Find(KSemiColon);

        if (KErrNotFound == semicolonPos)

        {

            semicolonPos = aCmdLine.Mid(argPos).Length();

        }

        TInt argLen = semicolonPos - aArgName.Length();

        if (argLen >= KArgumentValueMaxLen)

        {

            // Protect from buffer overflow.

            WLOG2(EUtils,

                  "javaupgradeapp: argument value len too long (%d), cutting it to %d",

                  argLen, (KArgumentValueMaxLen - 1));

            argLen = KArgumentValueMaxLen - 1;

        }

        else if (argLen == 0)

        {

            User::Leave(KErrArgument);

        }

        valueBuf = aCmdLine.Mid(argPos + aArgName.Length(),  argLen);

    }

    // Allocate new HBufC

    HBufC *pBufValue = HBufC::NewL(valueBuf.Length() + 2);

    // Convert argument from UTF8 to UCS-2 (UTF16)

    std::wstring tmp = JavaCommonUtils::utf8ToWstring((const char *)valueBuf.PtrZ());

    // Return the argument inside the new HBufC

    *pBufValue = (const TUint16 *)(tmp.c_str());

    *aArgValue = pBufValue;

}

/**

 * Parse the name from the value of 'file' parameter in

 * command line given in aCmdLine

 *

 * @param aCmdLine  command line to be parsed, the format is

 *  <other_args>;file=YYY;<other_args>

 * @param aFileName will contain the name parsed from command line

 */

static void getNameFromCommandLineL(const TPtrC8 &aCmdLine, HBufC **aFileName)

{

    TInt err = aCmdLine.FindF(KFileArg);

    User::LeaveIfError(err);

    getArgValueL(aCmdLine, KFileArg, aFileName);

}

/**

 * Parse the Uid from the value of 'uid' parameter in

 * command line given in aCmdLine

 *

 * @param aCmdLine  command line to be parsed, the format is

 *  uid=YYY;<other_args>

 * @param aUid will contain the Uid parsed from command line

 */

static void getUidFromCommandLineL(const TPtrC8 &aCmdLine, TInt32 &aUid)

{

    TInt err(KErrNone);

    TInt argPos = aCmdLine.FindF(KUidArg);

    if (KErrNotFound != argPos)

    {

        TPtrC8 uidToParse = aCmdLine.Mid(argPos + KUidArg.iTypeLength);

        TLex8 parseUid(uidToParse);

        if (uidToParse.FindF(KHexValueStart) == 0)

        {

            parseUid.Inc(2); // skip hex prefix

            TUint32 tmpValue;

            err = parseUid.Val(tmpValue, EHex);

            aUid = tmpValue;

        }

        else

        {

            err = parseUid.Val(aUid);

        }

        if (KErrNone != err)

        {

            ELOG1(EUtils,

                  "javaupgradeapp failed parsing app Uid from cmdline uid param. Error %d",

                  err);

        }

    }

    else

    {

        ELOG(EUtils,

             "javaupgradeapp cannot uninstall app because uid parameter is not given");

    }

    User::LeaveIfError(err);

}

/**

 * Parse the process command line.

 * Determine the uid of the Java application to be uninstalled and

 * the name of the application package to be installed.

 * Leaves if argument 'file' exist but file name cannot be found,

 * leaves if argument 'uid' exist but uid cannot be parsed from command line,

 * does NOT leave if only one of the arguments is present

 *

 * @param aFileName returns value of argument 'file'

 * @param aUid returns Uid of the Java application to be uninstalled

 */

void getFileAndUidL(HBufC **aFileName, TInt32 *aUid)

{

    CApaCommandLine* commandLine;

    // CApaCommandLine command line is used when this application has been

    // launched using AppArc APIs.

    TInt err = CApaCommandLine::GetCommandLineFromProcessEnvironment(commandLine);

    if (KErrNone != err)

    {

        ELOG1(EUtils, "javaupgradeapp: Getting CApaCommandLine failed, err %d", err);

        User::Leave(err);

    }

    CleanupStack::PushL(commandLine);

    // Get the value of _application-args_

    TPtrC8 args = commandLine->TailEnd();

    HBufC8 *pBufCmdLine =

        HBufC8::NewLC(args.Length() + KExtraLenForLogging);

    if (args.Length() > 0)

    {

        // Copy the arguments to the new HBufC8

        TPtr8 cmdLineBuf = pBufCmdLine->Des();

        cmdLineBuf = args;

        LOG1(EUtils, EInfo,

            "javaupgradeapp: full cmd line is : %s",

            cmdLineBuf.PtrZ());

        // Get the midlet uid from the commandline

        TRAPD(err, getUidFromCommandLineL(cmdLineBuf, *aUid));

        // It is enough that either midlet uid OR installation package name

        // have been given in commandline

        if ((err != KErrNone) && (err != KErrNotFound))

        {

            User::Leave(err);

        }

        // Get the name of the installation package from the commandline

        TRAPD(err2, getNameFromCommandLineL(cmdLineBuf, aFileName))

        if (err2 != KErrNone)

        {

            if (err2 == KErrNotFound)

            {

                if (err == KErrNotFound)

                {

                    // Both arguments missing

                    User::Leave(KErrArgument);

                }

            }

            else

            {

                User::Leave(err2);

            }

        }

    }

    else

    {

        ELOG(EUtils, "javaupgradeapp: empty command line");

        User::Leave(KErrArgument);

    }

    CleanupStack::PopAndDestroy(pBufCmdLine);

    CleanupStack::PopAndDestroy(commandLine);

}

/**

 * Uninstall the java application specified by aUid parameter.

 *

 * @param aUid the Uid of the java application to be uninstalled

 */

void uninstallJavaAppL(TInt32 aUid)

{

    RProcess rJavaInstaller;

    TFileName fileName;

    // Max one path name and some options -> 1536 is enough

    TBuf<1536> commandLine;

    // Build command line used to pass all necessary info to Java Installer

    TInt len = strlen(java::runtime::JAVA_INSTALLER_STARTER_DLL);

    TPtr8 ptr8InstallerDll((TUint8 *)java::runtime::JAVA_INSTALLER_STARTER_DLL, len, len);

    commandLine.Copy(ptr8InstallerDll);

    // Use command line options that make sure that uninstallation is done

    // always, silently and so that the uninstalled java application will

    // be preinstalled again if the user uninstalls it

    commandLine.Append(_L(" uninstall -uid="));

    commandLine.AppendNum(aUid);

    commandLine.Append(_L(" -forceuninstall -silent -resetpreinstall"));

    LOG1WSTR(EUtils, EInfo,

        "javaupgradeapp:uninstallJavaAppL Java Installer command line is %s",

        (wchar_t *)(commandLine.PtrZ()));

    // start JavaInstaller

    TBuf<64> installerProcess;  // Actual len of the process name is 9

    len = strlen(java::runtime::JAVA_PROCESS);

    TPtr8 ptr8Process((TUint8 *)java::runtime::JAVA_PROCESS, len, len);

    installerProcess.Copy(ptr8Process);

    TRequestStatus status;

    TInt err = rJavaInstaller.Create(installerProcess, commandLine);

    if (KErrNone == err)

    {

        LOG(EUtils, EInfo, "javaupgradeapp:uninstallJavaAppL calling Logon");

        // Get notification when Java Installer exits (or panics)

        rJavaInstaller.Logon(status);

        LOG(EUtils, EInfo, "javaupgradeapp:uninstallJavaAppL calling Resume");

        rJavaInstaller.Resume();

    }

    else

    {

        ELOG1(EUtils,

              "javaupgradeapp:uninstallJavaAppL Cannot start Java Installer, error %d",

              err);

        User::Leave(err);

    }

    // now wait until Java Installer exits

    User::WaitForRequest(status);

    LOG(EUtils, EInfo, "javaupgradeapp:uninstallJavaAppL calling RProcess::Close");

    // free resources before returning

    rJavaInstaller.Close();

}

/**

 *

 *

 *

 */

void installAppPackageL(HBufC *aBufFileName)

{

    // Open file using default handler,

    // if the file is an installation package, it will be installed

    RApaLsSession apaSession;

    TInt err = apaSession.Connect();

    if (KErrNone != err)

    {

        ELOG(EUtils,

             "javaupgradeapp:installAppPackageL: Cannot connect to AppArc server");

        User::Leave(err);

    }

    CleanupClosePushL(apaSession);

    TInt      retryCounter(10);

    TThreadId handlerTreadId;

    do

    {

        err = apaSession.StartDocument(*aBufFileName, handlerTreadId);

        if (RApaLsSession::EAppListInvalid == err)

        {

            // Application list has not yet been populated,

            // try again after a short delay

            retryCounter--;

            if (retryCounter > 0)

            {

                User::After(KDelayWhenWaitingAppArc); // codescanner::userafter

                continue;

            }

            else

            {

                ELOG(EUtils,

                     "javaupgradeapp:installAppPackageL: RApaLsSession "

                     "StartDocument returned EAppListInvalid for 10 times, exiting");

                User::Leave(err);

            }

        }

        else if (KErrNone != err)

        {

            ELOG1(EUtils,

                "javaupgradeapp:installAppPackageL: RApaLsSession "

                     "StartDocument returned error %d", err);

            User::Leave(err);

        }

    } while (RApaLsSession::EAppListInvalid == err);

    CleanupStack::PopAndDestroy(); // apaSession

}

/**

 * Get the uid of the Java application to be uninstaller and

 * start Java Installer to uninstall the application.

 * Then install the new application package given in cmdline

 *

 */

void handleUpgradeL(void)

{

    HBufC *pBufFileName = NULL;

    TInt32 uid(0);

    getFileAndUidL(&pBufFileName, &uid);

    if (uid != 0)

    {

        PLOG1(EUtils, "javaupgradeapp uninstalling app uid %x", uid);

        uninstallJavaAppL(uid);

    }

    else

    {

        WLOG(EUtils, "javaupgradeapp: uid argument was not given");

    }

    if (pBufFileName != NULL)

    {

        PLOG1WSTR(EUtils,

            "javaupgradeapp: installing new app package %s",

            (wchar_t *)(pBufFileName->Des().PtrZ()));

        installAppPackageL(pBufFileName);

        delete pBufFileName;

    }

    else

    {

        WLOG(EUtils, "javaupgradeapp: file argument was not given");

    }

}

/**

 * Main function of executable javaupgradeapp.exe.

 * "installer app" created by Services team starts this executable when

 * the "installer app" must be replaced with the real application (java/native or wrt)

 *

 * The command line format is

 * uid=<Uid>;file=<full_path_to_installation_file>

 * for example

 * uid=0x10137c4d;file=D:\\temp\\upgrade\\package.sis

 *

 * Sample code for starting this application from the "installer app" MIDlet

 * @code

    MIDlet.platformRequest(

        “nativeapp://application-exe=javaupgradeapp.exe;application-args=uid=0x10137c4d;file=D:\\temp\\upgrade\\package.sis”);

 * @endcode

 *

 */

TInt E32Main(void)

{

    // TODO: check that only MIDP runtime process can start this in final version

    // that goes to ROM

    CTrapCleanup *pCleanupStack = CTrapCleanup::New();

    if (NULL == pCleanupStack)

    {

        ELOG(EUtils, "Cannot create CleanupStack in javaupgradeapp.exe main()");

        return KErrNoMemory;

    }

    TRAPD(err, handleUpgradeL());

    if (KErrNone != err)

    {

        ELOG1(EUtils, "javaupgradeapp.exe: handleUpgradeL leaved with err %d", err);

    }

    delete pCleanupStack;

    return err;

}