/*
 * user.c: APR wrapper functions for Subversion
 *
 * ====================================================================
 * Copyright (c) 2000-2004 CollabNet.  All rights reserved.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution.  The terms
 * are also available at http://subversion.tigris.org/license-1.html.
 * If newer versions of this license are posted there, you may use a
 * newer version instead, at your option.
 *
 * This software consists of voluntary contributions made by many
 * individuals.  For exact contribution history, see the revision
 * history and logs, available at http://subversion.tigris.org/.
 * ====================================================================
 */


#include <apr_pools.h>
#include <apr_user.h>
#include <apr_env.h>

#include "svn_user.h"
#include "svn_utf.h"

/* Get the current user's name from the OS */
static const char *
get_os_username(apr_pool_t *pool)
{
#if APR_HAS_USER
  char *username;
  apr_uid_t uid;
  apr_gid_t gid;

  if (apr_uid_current(&uid, &gid, pool) == APR_SUCCESS &&
      apr_uid_name_get(&username, uid, pool) == APR_SUCCESS)
    return username;
#endif

  return NULL;
}

/* Return a UTF8 version of STR, or NULL on error.
   Use POOL for any necessary allocation. */
static const char *
utf8_or_nothing(const char *str, apr_pool_t *pool) {
  if (str)
    {
      const char *utf8_str;
      svn_error_t *err = svn_utf_cstring_to_utf8(&utf8_str, str, pool);
      if (! err)
        return utf8_str;
      svn_error_clear(err);
    }
  return NULL;
}

const char *
svn_user_get_name(apr_pool_t *pool)
{
  const char *username = get_os_username(pool);
  return utf8_or_nothing(username, pool);
}

const char *
svn_user_get_homedir(apr_pool_t *pool)
{
  const char *username;
  char *homedir;

  if (apr_env_get(&homedir, "HOME", pool) == APR_SUCCESS)
    return utf8_or_nothing(homedir, pool);

  username = get_os_username(pool);
  if (username != NULL &&
      apr_uid_homepath_get(&homedir, username, pool) == APR_SUCCESS)
    return utf8_or_nothing(homedir, pool);

  return NULL;
}