/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * 
 *************************************************************/



#include "precompiled_desktop.hxx"

#include "sal/config.h"

#include <cstddef>
#include <utility>
#include <vector>

#include "osl/diagnose.h"
#include "rtl/strbuf.hxx"
#include "rtl/string.hxx"
#include "rtl/textenc.h"
#include "rtl/uri.h"
#include "rtl/uri.hxx"
#include "rtl/ustring.hxx"
#include <hash_map>

#include "dp_identifier.hxx"
#include "dp_persmap.h"

#include "dp_activepackages.hxx"

// Old format of database entry:
//   key: UTF8(filename)
//   value: UTF8(tempname ";" mediatype)
// New format of database entry:
//   key: 0xFF UTF8(identifier)
//   value: UTF8(tempname) 0xFF UTF8(filename) 0xFF UTF8(mediatype)

namespace {

static char const separator = static_cast< char >(
    static_cast< unsigned char >(0xFF));

static char const legacyPrefix[] = "org.openoffice.legacy.";

::rtl::OString oldKey(::rtl::OUString const & fileName) {
    return ::rtl::OUStringToOString(fileName, RTL_TEXTENCODING_UTF8);
}

::rtl::OString newKey(::rtl::OUString const & id) {
    ::rtl::OStringBuffer b;
    b.append(separator);
    b.append(::rtl::OUStringToOString(id, RTL_TEXTENCODING_UTF8));
    return b.makeStringAndClear();
}

::dp_manager::ActivePackages::Data decodeOldData(
    ::rtl::OUString const & fileName, ::rtl::OString const & value)
{
    ::dp_manager::ActivePackages::Data d;
    sal_Int32 i = value.indexOf(';');
    OSL_ASSERT(i >= 0);
    d.temporaryName = ::rtl::OUString(value.getStr(), i, RTL_TEXTENCODING_UTF8);
    d.fileName = fileName;
    d.mediaType = ::rtl::OUString(
        value.getStr() + i + 1, value.getLength() - i - 1,
        RTL_TEXTENCODING_UTF8);
    return d;
}

::dp_manager::ActivePackages::Data decodeNewData(::rtl::OString const & value) {
    ::dp_manager::ActivePackages::Data d;
    sal_Int32 i1 = value.indexOf(separator);
    OSL_ASSERT(i1 >= 0);
    d.temporaryName = ::rtl::OUString(
        value.getStr(), i1, RTL_TEXTENCODING_UTF8);
    sal_Int32 i2 = value.indexOf(separator, i1 + 1);
    OSL_ASSERT(i2 >= 0);
    d.fileName = ::rtl::OUString(
        value.getStr() + i1 + 1, i2 - i1 - 1, RTL_TEXTENCODING_UTF8);
    sal_Int32 i3 = value.indexOf(separator, i2 + 1);

    if (i3 < 0)
    {
        //Before ActivePackages::Data::version was added
        d.mediaType = ::rtl::OUString(
            value.getStr() + i2 + 1, value.getLength() - i2 - 1,
            RTL_TEXTENCODING_UTF8);
    }
    else
    {
        sal_Int32 i4 = value.indexOf(separator, i3 + 1);
        d.mediaType = ::rtl::OUString(
            value.getStr() + i2 + 1, i3 - i2 -1, RTL_TEXTENCODING_UTF8);
        d.version = ::rtl::OUString(
            value.getStr() + i3 + 1, i4 - i3 - 1,
            RTL_TEXTENCODING_UTF8);
        d.failedPrerequisites = ::rtl::OUString(
            value.getStr() + i4 + 1, value.getLength() - i4 - 1,
            RTL_TEXTENCODING_UTF8);
    }
    return d;
}

}

namespace dp_manager {

ActivePackages::ActivePackages() {}

ActivePackages::ActivePackages(::rtl::OUString const & url, bool readOnly):
    m_map(url, readOnly) {}

ActivePackages::~ActivePackages() {}

bool ActivePackages::has(
    ::rtl::OUString const & id, ::rtl::OUString const & fileName) const
{
    return get(NULL, id, fileName);
}

bool ActivePackages::get(
    Data * data, ::rtl::OUString const & id, ::rtl::OUString const & fileName)
    const
{
    ::rtl::OString v;
    if (m_map.get(&v, newKey(id))) {
        if (data != NULL) {
            *data = decodeNewData(v);
        }
        return true;
    } else if (m_map.get(&v, oldKey(fileName))) {
        if (data != NULL) {
            *data = decodeOldData(fileName, v);
        }
        return true;
    } else {
        return false;
    }
}

ActivePackages::Entries ActivePackages::getEntries() const {
    Entries es;
    ::dp_misc::t_string2string_map m(m_map.getEntries());
    for (::dp_misc::t_string2string_map::const_iterator i(m.begin());
         i != m.end(); ++i)
    {
        if (i->first.getLength() > 0 && i->first[0] == separator) {
            es.push_back(
                ::std::make_pair(
                    ::rtl::OUString(
                        i->first.getStr() + 1, i->first.getLength() - 1,
                        RTL_TEXTENCODING_UTF8),
                    decodeNewData(i->second)));
        } else {
            ::rtl::OUString fn(
                ::rtl::OStringToOUString(i->first, RTL_TEXTENCODING_UTF8));
            es.push_back(
                ::std::make_pair(
                    ::dp_misc::generateLegacyIdentifier(fn),
                    decodeOldData(fn, i->second)));
        }
    }
    return es;
}

void ActivePackages::put(::rtl::OUString const & id, Data const & data) {
    ::rtl::OStringBuffer b;
    b.append(
        ::rtl::OUStringToOString(data.temporaryName, RTL_TEXTENCODING_UTF8));
    b.append(separator);
    b.append(::rtl::OUStringToOString(data.fileName, RTL_TEXTENCODING_UTF8));
    b.append(separator);
    b.append(::rtl::OUStringToOString(data.mediaType, RTL_TEXTENCODING_UTF8));
    b.append(separator);
    b.append(::rtl::OUStringToOString(data.version, RTL_TEXTENCODING_UTF8));
    b.append(separator);
    b.append(::rtl::OUStringToOString(data.failedPrerequisites, RTL_TEXTENCODING_UTF8));
    m_map.put(newKey(id), b.makeStringAndClear());
}

void ActivePackages::erase(
    ::rtl::OUString const & id, ::rtl::OUString const & fileName)
{
    m_map.erase(newKey(id), true) || m_map.erase(oldKey(fileName), true);
}

}