/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   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 .
 */

#include <config_folders.h>

#include <osl/thread.h>

#include <rtl/bootstrap.hxx>

#include <osl/file.hxx>
#include <rtl/strbuf.hxx>
#include <sal/log.hxx>
#include "cmdmailsuppl.hxx"
#include "cmdmailmsg.hxx"
#include <com/sun/star/system/SimpleMailClientFlags.hpp>
#include <com/sun/star/container/XNameAccess.hpp>
#include <com/sun/star/configuration/theDefaultProvider.hpp>
#include <com/sun/star/beans/PropertyValue.hpp>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <cppuhelper/supportsservice.hxx>

#include <string.h>
#include <errno.h>
#include <unistd.h>

using com::sun::star::beans::PropertyValue;
using com::sun::star::system::XSimpleMailClientSupplier;
using com::sun::star::system::XSimpleMailClient;
using com::sun::star::system::XSimpleMailMessage;
using com::sun::star::system::XSimpleMailMessage2;
using com::sun::star::container::XNameAccess;
using osl::FileBase;

using namespace cppu;
using namespace com::sun::star::system::SimpleMailClientFlags;
using namespace com::sun::star::uno;
using namespace com::sun::star::lang;
using namespace com::sun::star::configuration;

namespace
{
    Sequence< OUString > Component_getSupportedServiceNames()
    {
        Sequence< OUString > aRet { "com.sun.star.system.SimpleCommandMail" };
        return aRet;
    }

}

CmdMailSuppl::CmdMailSuppl( const Reference< XComponentContext >& xContext ) :
    WeakImplHelper< XSimpleMailClientSupplier, XSimpleMailClient, XServiceInfo >()
{
    m_xConfigurationProvider = theDefaultProvider::get(xContext);
}

// XSimpleMailClientSupplier

Reference< XSimpleMailClient > SAL_CALL CmdMailSuppl::querySimpleMailClient(  )
{
    return static_cast < XSimpleMailClient * > (this);
}

// XSimpleMailClient

Reference< XSimpleMailMessage > SAL_CALL CmdMailSuppl::createSimpleMailMessage(  )
{
    return Reference< XSimpleMailMessage >( new CmdMailMsg(  ) );
}

namespace {

void appendShellWord(OStringBuffer & buffer, OUString const & word, bool strict)
{
    OString sys;
    if (!word.convertToString(
            &sys, osl_getThreadTextEncoding(),
            (strict
             ? (RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR
                | RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR)
             : OUSTRING_TO_OSTRING_CVTFLAGS)))
    {
        throw css::uno::Exception(
            ("Could not convert \"" + word + "\" to encoding #"
             + OUString::number(osl_getThreadTextEncoding())),
            css::uno::Reference<css::uno::XInterface>());
    }
    buffer.append('\'');
    for (sal_Int32 i = 0; i != sys.getLength(); ++i) {
        char c = sys[i];
        switch (c) {
        case 0:
            if (strict) {
                throw css::uno::Exception(
                    "Could not convert word containing NUL, \"" + word + "\"",
                    css::uno::Reference<css::uno::XInterface>());
            }
            break;
        case '\'':
            buffer.append("'\\''");
            break;
        default:
            buffer.append(c);
            break;
        }
    }
    buffer.append('\'');
}

}

void SAL_CALL CmdMailSuppl::sendSimpleMailMessage( const Reference< XSimpleMailMessage >& xSimpleMailMessage, sal_Int32 /*aFlag*/ )
{
    if ( ! xSimpleMailMessage.is() )
    {
        throw css::lang::IllegalArgumentException( "No message specified" ,
            static_cast < XSimpleMailClient * > (this), 1 );
    }

    if( ! m_xConfigurationProvider.is() )
    {
        throw css::uno::Exception( "Can not access configuration" ,
            static_cast < XSimpleMailClient * > (this) );
    }


    OUString aProgramURL("$BRAND_BASE_DIR/" LIBO_LIBEXEC_FOLDER "/senddoc");
    rtl::Bootstrap::expandMacros(aProgramURL);

    OUString aProgram;
    if ( FileBase::E_None != FileBase::getSystemPathFromFileURL(aProgramURL, aProgram))
    {
        throw css::uno::Exception("Could not convert executable path",
            static_cast < XSimpleMailClient * > (this));
    }

    OStringBuffer aBuffer;
    appendShellWord(aBuffer, aProgram, true);

    try
    {
        // Query XNameAccess interface of the org.openoffice.Office.Common/ExternalMailer
        // configuration node to retrieve the users preferred email application. This may
        // transparently by redirected to e.g. the corresponding GConf setting in GNOME.
        OUString aConfigRoot = "org.openoffice.Office.Common/ExternalMailer";

        PropertyValue aProperty;
        aProperty.Name = "nodepath";
        aProperty.Value <<= aConfigRoot;

        Sequence< Any > aArgumentList( 1 );
        aArgumentList[0] <<= aProperty;

        Reference< XNameAccess > xNameAccess =
            Reference< XNameAccess > (
                m_xConfigurationProvider->createInstanceWithArguments(
                    "com.sun.star.configuration.ConfigurationAccess",
                    aArgumentList ),
                UNO_QUERY );

        if( xNameAccess.is() )
        {
            OUString aMailer;

            // Retrieve the value for "Program" node and append it feed senddoc with it
            // using the (undocumented) --mailclient switch
            xNameAccess->getByName("Program") >>= aMailer;

            if( !aMailer.isEmpty() )
            {
                // make sure we have a system path
                FileBase::getSystemPathFromFileURL( aMailer, aMailer );

                aBuffer.append(" --mailclient ");
                appendShellWord(aBuffer, aMailer, true);
            }
#ifdef MACOSX
            else
                aBuffer.append(" --mailclient Mail");
#endif
        }

    }

    catch(const RuntimeException &e )
    {
        m_xConfigurationProvider.clear();
        SAL_WARN("shell", "RuntimeException caught accessing configuration provider. " << e );
        throw;
    }

    Reference< XSimpleMailMessage2 > xMessage( xSimpleMailMessage, UNO_QUERY );
    if ( xMessage.is() )
    {
        OUString sBody = xMessage->getBody();
        if ( sBody.getLength() > 0 )
        {
            aBuffer.append(" --body ");
            appendShellWord(aBuffer, sBody, false);
        }
    }

    // Convert from, to, etc. in a best-effort rather than a strict way to the
    // system encoding, based on the assumption that the relevant address parts
    // of those strings are ASCII anyway and any problematic characters are only
    // in the human-readable, informational-only parts:

    // Append originator if set in the message
    if ( !xSimpleMailMessage->getOriginator().isEmpty() )
    {
        aBuffer.append(" --from ");
        appendShellWord(aBuffer, xSimpleMailMessage->getOriginator(), false);
    }

    // Append recipient if set in the message
    if ( !xSimpleMailMessage->getRecipient().isEmpty() )
    {
        aBuffer.append(" --to ");
        appendShellWord(aBuffer, xSimpleMailMessage->getRecipient(), false);
    }

    // Append carbon copy recipients set in the message
    Sequence< OUString > aStringList = xSimpleMailMessage->getCcRecipient();
    sal_Int32 n, nmax = aStringList.getLength();
    for ( n = 0; n < nmax; n++ )
    {
        aBuffer.append(" --cc ");
        appendShellWord(aBuffer, aStringList[n], false);
    }

    // Append blind carbon copy recipients set in the message
    aStringList = xSimpleMailMessage->getBccRecipient();
    nmax = aStringList.getLength();
    for ( n = 0; n < nmax; n++ )
    {
        aBuffer.append(" --bcc ");
        appendShellWord(aBuffer, aStringList[n], false);
    }

    // Append subject if set in the message
    if ( !xSimpleMailMessage->getSubject().isEmpty() )
    {
        aBuffer.append(" --subject ");
        appendShellWord(aBuffer, xSimpleMailMessage->getSubject(), false);
    }

    // Append attachments set in the message
    aStringList = xSimpleMailMessage->getAttachement();
    nmax = aStringList.getLength();
    for ( n = 0; n < nmax; n++ )
    {
        OUString aSystemPath;
        if ( FileBase::E_None == FileBase::getSystemPathFromFileURL(aStringList[n], aSystemPath) )
        {
            aBuffer.append(" --attach ");
            appendShellWord(aBuffer, aSystemPath, true);
        }
    }

    OString cmd = aBuffer.makeStringAndClear();
    FILE * f = popen(cmd.getStr(), "w");
    if (f == nullptr || pclose(f) != 0)
    {
        throw css::uno::Exception("No mail client configured",
            static_cast < XSimpleMailClient * > (this) );
    }
}

// XServiceInfo

OUString SAL_CALL CmdMailSuppl::getImplementationName(  )
{
    return OUString("com.sun.star.comp.system.SimpleCommandMail");
}

sal_Bool SAL_CALL CmdMailSuppl::supportsService( const OUString& ServiceName )
{
    return cppu::supportsService(this, ServiceName);
}

Sequence< OUString > SAL_CALL CmdMailSuppl::getSupportedServiceNames(    )
{
    return Component_getSupportedServiceNames();
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */