/*
 * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
/**
 * @file    installer_task_private_storage.cpp
 * @author  Zbigniew Kostrzewa (z.kostrzewa@samsung.com)
 * @version 1.0
 * @brief   Implementation file for installer task private storage.
 */
#include "task_private_storage.h"

#include <pwd.h>
#include <grp.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string>

#include <dpl/log/log.h>
#include <dpl/errno_string.h>

#include <dpl/wrt-dao-ro/widget_config.h>
#include <dpl/utils/file_utils.h>
#include <widget_install/job_widget_install.h>
#include <widget_install/widget_install_context.h>
#include <widget_install/widget_install_errors.h>

#define WEBAPP_DEFAULT_UID  5000
#define WEBAPP_DEFAULT_GID  5000

namespace {
const mode_t PRIVATE_STORAGE_MODE = 0700;
}

namespace Jobs {
namespace WidgetInstall {
TaskPrivateStorage::TaskPrivateStorage(InstallerContext& context) :
    DPL::TaskDecl<TaskPrivateStorage>(this),
    m_context(context)
{
    AddStep(&TaskPrivateStorage::StepCreateDirectory);
}

void TaskPrivateStorage::StepCreateDirectory()
{
    using namespace WrtDB;

    LogInfo("Step: Creating private storage directory.");

    m_context.installStep =
        InstallerContext::INSTALL_CREATE_PRIVATE_STORAGE;

    std::ostringstream widgetPath;
    DPL::OptionalString pkgname = m_context.widgetConfig.pkgname;
    if(!pkgname.IsNull()) {
        widgetPath << m_context.locations->getPackageInstallationDir() << "/";
    } else {
        ThrowMsg(Exceptions::InternalError, "No Package name exists.");
    }

    if (access(widgetPath.str().c_str(), W_OK | X_OK) != 0) {
        ThrowMsg(Exceptions::InternalError, DPL::GetErrnoString());
    }

    std::ostringstream storagePath;
    storagePath << widgetPath.str().c_str()
                << GlobalConfig::GetWidgetPrivateStoragePath();

    if (access(storagePath.str().c_str(), F_OK) != 0) {
        FileUtils::MakePath(storagePath.str(), PRIVATE_STORAGE_MODE);
        // '5000' is default uid, gid for applications.
        // So installed applications should be launched as process of uid '5000'.
        // the process can access private directory 'data' of itself.
        if(chown(storagePath.str().c_str(),
                 WEBAPP_DEFAULT_UID,
                 WEBAPP_DEFAULT_GID) != 0)
        {
            ThrowMsg(Exceptions::InternalError,
                 "Chown to invaild user");
        }
    } else if (access(storagePath.str().c_str(), W_OK | R_OK | X_OK) == 0) {
        LogInfo("Private storage already exists.");
        // Even if private directory already is created, private dircetory
        // should change owner.
        if(chown(storagePath.str().c_str(),
                 WEBAPP_DEFAULT_UID,
                 WEBAPP_DEFAULT_GID) != 0)
        {
            ThrowMsg(Exceptions::InternalError,
                 "Chown to invaild user");
        }
        if(chmod(storagePath.str().c_str(), PRIVATE_STORAGE_MODE) != 0) {
            ThrowMsg(Exceptions::InternalError,
                 "chmod to 0700");
        }

    } else {
        ThrowMsg(Exceptions::InternalError,
                 "No access to private storage.");
    }

    m_context.job->UpdateProgress(
        InstallerContext::INSTALL_CREATE_PRIVATE_STORAGE,
        "Private storage created."
        );
}
} //namespace WidgetInstall
} //namespace Jobs