/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* 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/. */

#include "nsUserInfo.h"

#include "nsCRT.h"

#include <pwd.h>

#include <sys/types.h>

#include <unistd.h>

#include <sys/utsname.h>

#include "nsString.h"

#include "nsReadableUtils.h"

#include "nsNativeCharsetUtils.h"

/* Some UNIXy platforms don't have pw_gecos. In this case we use pw_name */

#if defined(NO_PW_GECOS)

#define PW_GECOS pw_name

#else

#define PW_GECOS pw_gecos

#endif

nsUserInfo::nsUserInfo()

{

}

nsUserInfo::~nsUserInfo()

{

}

NS_IMPL_ISUPPORTS(nsUserInfo,nsIUserInfo)

NS_IMETHODIMP

nsUserInfo::GetFullname(nsAString& aFullname)

{

    struct passwd *pw = nullptr;

    pw = getpwuid (geteuid());

    if (!pw || !pw->PW_GECOS) return NS_ERROR_FAILURE;

#ifdef DEBUG_sspitzer

    printf("fullname = %s\n", pw->PW_GECOS);

#endif

    nsAutoCString fullname(pw->PW_GECOS);

    // now try to parse the GECOS information, which will be in the form

    // Full Name, <other stuff> - eliminate the ", <other stuff>

    // also, sometimes GECOS uses "&" to mean "the user name" so do

    // the appropriate substitution

    // truncate at first comma (field delimiter)

    int32_t index;

    if ((index = fullname.Find(",")) != kNotFound)

        fullname.Truncate(index);

    // replace ampersand with username

    if (pw->pw_name) {

        nsAutoCString username(pw->pw_name);

        if (!username.IsEmpty() && nsCRT::IsLower(username.CharAt(0)))

            username.SetCharAt(nsCRT::ToUpper(username.CharAt(0)), 0);

        fullname.ReplaceSubstring("&", username.get());

    }

    NS_CopyNativeToUnicode(fullname, aFullname);

    return NS_OK;

}

NS_IMETHODIMP

nsUserInfo::GetUsername(nsACString& aUsername)

{

    struct passwd *pw = nullptr;

    // is this portable?  those are POSIX compliant calls, but I need to check

    pw = getpwuid(geteuid());

    if (!pw || !pw->pw_name) return NS_ERROR_FAILURE;

#ifdef DEBUG_sspitzer

    printf("username = %s\n", pw->pw_name);

#endif

    aUsername.Assign(pw->pw_name);

    return NS_OK;

}

NS_IMETHODIMP

nsUserInfo::GetDomain(nsACString& aDomain)

{

    nsresult rv = NS_ERROR_FAILURE;

    struct utsname buf;

    char *domainname = nullptr;

    if (uname(&buf) < 0) {

        return rv;

    }

#if defined(__linux__)

    domainname = buf.domainname;

#endif

    if (domainname && domainname[0]) {

        aDomain.Assign(domainname);

        rv = NS_OK;

    }

    else {

        // try to get the hostname from the nodename

        // on machines that use DHCP, domainname may not be set

        // but the nodename might.

        if (buf.nodename[0]) {

            // if the nodename is foo.bar.org, use bar.org as the domain

            char *pos = strchr(buf.nodename,'.');

            if (pos) {

                aDomain.Assign(pos + 1);

                rv = NS_OK;

            }

        }

    }

    return rv;

}

NS_IMETHODIMP

nsUserInfo::GetEmailAddress(nsACString& aEmailAddress)

{

    // use username + "@" + domain for the email address

    nsresult rv;

    nsCString username;

    nsCString domain;

    rv = GetUsername(username);

    if (NS_FAILED(rv)) return rv;

    rv = GetDomain(domain);

    if (NS_FAILED(rv)) return rv;

    if (username.IsEmpty() || domain.IsEmpty()) {

        return NS_ERROR_FAILURE;

    }

    aEmailAddress = username + NS_LITERAL_CSTRING("@") + domain;

    return NS_OK;

}