#!/usr/bin/env python
# -*- coding: utf-8 -*-

# ***********************IMPORTANT NMAP LICENSE TERMS************************
# *                                                                         *
# * The Nmap Security Scanner is (C) 1996-2013 Insecure.Com LLC. Nmap is    *
# * also a registered trademark of Insecure.Com LLC.  This program is free  *
# * software; you may redistribute and/or modify it under the terms of the  *
# * GNU General Public License as published by the Free Software            *
# * Foundation; Version 2 ("GPL"), BUT ONLY WITH ALL OF THE CLARIFICATIONS  *
# * AND EXCEPTIONS DESCRIBED HEREIN.  This guarantees your right to use,    *
# * modify, and redistribute this software under certain conditions.  If    *
# * you wish to embed Nmap technology into proprietary software, we sell    *
# * alternative licenses (contact sales@nmap.com).  Dozens of software      *
# * vendors already license Nmap technology such as host discovery, port    *
# * scanning, OS detection, version detection, and the Nmap Scripting       *
# * Engine.                                                                 *
# *                                                                         *
# * Note that the GPL places important restrictions on "derivative works",  *
# * yet it does not provide a detailed definition of that term.  To avoid   *
# * misunderstandings, we interpret that term as broadly as copyright law   *
# * allows.  For example, we consider an application to constitute a        *
# * derivative work for the purpose of this license if it does any of the   *
# * following with any software or content covered by this license          *
# * ("Covered Software"):                                                   *
# *                                                                         *
# * o Integrates source code from Covered Software.                         *
# *                                                                         *
# * o Reads or includes copyrighted data files, such as Nmap's nmap-os-db   *
# * or nmap-service-probes.                                                 *
# *                                                                         *
# * o Is designed specifically to execute Covered Software and parse the    *
# * results (as opposed to typical shell or execution-menu apps, which will *
# * execute anything you tell them to).                                     *
# *                                                                         *
# * o Includes Covered Software in a proprietary executable installer.  The *
# * installers produced by InstallShield are an example of this.  Including *
# * Nmap with other software in compressed or archival form does not        *
# * trigger this provision, provided appropriate open source decompression  *
# * or de-archiving software is widely available for no charge.  For the    *
# * purposes of this license, an installer is considered to include Covered *
# * Software even if it actually retrieves a copy of Covered Software from  *
# * another source during runtime (such as by downloading it from the       *
# * Internet).                                                              *
# *                                                                         *
# * o Links (statically or dynamically) to a library which does any of the  *
# * above.                                                                  *
# *                                                                         *
# * o Executes a helper program, module, or script to do any of the above.  *
# *                                                                         *
# * This list is not exclusive, but is meant to clarify our interpretation  *
# * of derived works with some common examples.  Other people may interpret *
# * the plain GPL differently, so we consider this a special exception to   *
# * the GPL that we apply to Covered Software.  Works which meet any of     *
# * these conditions must conform to all of the terms of this license,      *
# * particularly including the GPL Section 3 requirements of providing      *
# * source code and allowing free redistribution of the work as a whole.    *
# *                                                                         *
# * As another special exception to the GPL terms, Insecure.Com LLC grants  *
# * permission to link the code of this program with any version of the     *
# * OpenSSL library which is distributed under a license identical to that  *
# * listed in the included docs/licenses/OpenSSL.txt file, and distribute   *
# * linked combinations including the two.                                  *
# *                                                                         *
# * Any redistribution of Covered Software, including any derived works,    *
# * must obey and carry forward all of the terms of this license, including *
# * obeying all GPL rules and restrictions.  For example, source code of    *
# * the whole work must be provided and free redistribution must be         *
# * allowed.  All GPL references to "this License", are to be treated as    *
# * including the terms and conditions of this license text as well.        *
# *                                                                         *
# * Because this license imposes special exceptions to the GPL, Covered     *
# * Work may not be combined (even as part of a larger work) with plain GPL *
# * software.  The terms, conditions, and exceptions of this license must   *
# * be included as well.  This license is incompatible with some other open *
# * source licenses as well.  In some cases we can relicense portions of    *
# * Nmap or grant special permissions to use it in other open source        *
# * software.  Please contact fyodor@nmap.org with any such requests.       *
# * Similarly, we don't incorporate incompatible open source software into  *
# * Covered Software without special permission from the copyright holders. *
# *                                                                         *
# * If you have any questions about the licensing restrictions on using     *
# * Nmap in other works, are happy to help.  As mentioned above, we also    *
# * offer alternative license to integrate Nmap into proprietary            *
# * applications and appliances.  These contracts have been sold to dozens  *
# * of software vendors, and generally include a perpetual license as well  *
# * as providing for priority support and updates.  They also fund the      *
# * continued development of Nmap.  Please email sales@nmap.com for further *
# * information.                                                            *
# *                                                                         *
# * If you have received a written license agreement or contract for        *
# * Covered Software stating terms other than these, you may choose to use  *
# * and redistribute Covered Software under those terms instead of these.   *
# *                                                                         *
# * Source is provided to this software because we believe users have a     *
# * right to know exactly what a program is going to do before they run it. *
# * This also allows you to audit the software for security holes.          *
# *                                                                         *
# * Source code also allows you to port Nmap to new platforms, fix bugs,    *
# * and add new features.  You are highly encouraged to send your changes   *
# * to the dev@nmap.org mailing list for possible incorporation into the    *
# * main distribution.  By sending these changes to Fyodor or one of the    *
# * Insecure.Org development mailing lists, or checking them into the Nmap  *
# * source code repository, it is understood (unless you specify otherwise) *
# * that you are offering the Nmap Project (Insecure.Com LLC) the           *
# * unlimited, non-exclusive right to reuse, modify, and relicense the      *
# * code.  Nmap will always be available Open Source, but this is important *
# * because the inability to relicense code has caused devastating problems *
# * for other Free Software projects (such as KDE and NASM).  We also       *
# * occasionally relicense the code to third parties as discussed above.    *
# * If you wish to specify special license conditions of your               *
# * contributions, just say so when you send them.                          *
# *                                                                         *
# * This program is distributed in the hope that it will be useful, but     *
# * WITHOUT ANY WARRANTY; without even the implied warranty of              *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the Nmap      *
# * license file for more details (it's in a COPYING file included with     *
# * Nmap, and also available from https://svn.nmap.org/nmap/COPYING         *
# *                                                                         *
# ***************************************************************************/

from os.path import join, dirname

import errno
import os
import os.path
import sys
import shutil

from zenmapCore.BasePaths import base_paths, fs_dec
from zenmapCore.Version import VERSION
from zenmapCore.Name import APP_NAME


# Find out the prefix under which data files (interface definition XML,
# pixmaps, etc.) are stored. This can vary depending on whether we are running
# in an executable package and what type of package it is, which we check using
# the sys.frozen attribute. See
# http://mail.python.org/pipermail/pythonmac-sig/2004-November/012121.html.
def get_prefix():
    frozen = getattr(sys, "frozen", None)
    if frozen == "macosx_app":
        # A py2app .app bundle.
        return os.path.join(dirname(fs_dec(sys.executable)), "..", "Resources")
    elif frozen is not None:
        # Assume a py2exe executable.
        return dirname(fs_dec(sys.executable))
    else:
        # Normal script execution. Look in the current directory to allow
        # running from the distribution.
        return os.path.abspath(os.path.dirname(fs_dec(sys.argv[0])))

prefix = get_prefix()

# These lines are overwritten by the installer to hard-code the installed
# locations.
CONFIG_DIR = join(prefix, "share", APP_NAME, "config")
LOCALE_DIR = join(prefix, "share", APP_NAME, "locale")
MISC_DIR = join(prefix, "share", APP_NAME, "misc")
PIXMAPS_DIR = join(prefix, "share", "zenmap", "pixmaps")
DOCS_DIR = join(prefix, "share", APP_NAME, "docs")
NMAPDATADIR = join(prefix, "..")


def get_extra_executable_search_paths():
    """Return a list of additional executable search paths as a convenience for
    platforms where the default PATH is inadequate."""
    if sys.platform == 'darwin':
        return ["/usr/local/bin"]
    elif sys.platform == 'win32':
        return [dirname(sys.executable)]
    return []


#######
# Paths
class Paths(object):
    """Paths
    """
    hardcoded = ["config_dir",
                 "locale_dir",
                 "pixmaps_dir",
                 "misc_dir",
                 "docs_dir"]

    config_files_list = ["config_file",
                         "scan_profile",
                         "version"]

    empty_config_files_list = ["target_list",
                               "recent_scans",
                               "db"]

    misc_files_list = ["options",
                       "profile_editor"]

    def __init__(self):
        self.config_dir = CONFIG_DIR
        self.locale_dir = LOCALE_DIR
        self.pixmaps_dir = PIXMAPS_DIR
        self.misc_dir = MISC_DIR
        self.docs_dir = DOCS_DIR
        self.nmap_dir = NMAPDATADIR
        self._delayed_incomplete = True

    # Delay initializing these paths so that
    # zenmapCore.I18N.install_gettext can install _() before modules that
    # need it get imported
    def _delayed_init(self):
        if self._delayed_incomplete:
            from zenmapCore.UmitOptionParser import option_parser
            self.user_config_dir = option_parser.get_confdir()
            self.user_config_file = os.path.join(
                    self.user_config_dir, base_paths['user_config_file'])
            self._delayed_incomplete = False

    def __getattr__(self, name):
        if name in self.hardcoded:
            return self.__dict__[name]

        self._delayed_init()
        if name in self.config_files_list:
            return return_if_exists(
                    join(self.user_config_dir, base_paths[name]))

        if name in self.empty_config_files_list:
            return return_if_exists(
                    join(self.user_config_dir, base_paths[name]), True)

        if name in self.misc_files_list:
            return return_if_exists(join(self.misc_dir, base_paths[name]))

        try:
            return self.__dict__[name]
        except:
            raise NameError(name)

    def __setattr__(self, name, value):
        self.__dict__[name] = value


def create_dir(path):
    """Create a directory with os.makedirs without raising an error if the
    directory already exists."""
    try:
        os.makedirs(path)
    except OSError, e:
        if e.errno != errno.EEXIST:
            raise


def create_user_config_dir(user_dir, template_dir):
    """Create a user configuration directory by creating the directory if
    necessary, then copying all the files from the given template directory,
    skipping any that already exist."""
    from zenmapCore.UmitLogging import log
    log.debug(">>> Create user dir at %s" % user_dir)
    create_dir(user_dir)

    for filename in os.listdir(template_dir):
        template_filename = os.path.join(template_dir, filename)
        user_filename = os.path.join(user_dir, filename)
        # Only copy regular files.
        if not os.path.isfile(template_filename):
            continue
        # Don't overwrite existing files.
        if os.path.exists(user_filename):
            log.debug(">>> %s already exists." % user_filename)
            continue
        shutil.copyfile(template_filename, user_filename)
        log.debug(">>> Copy %s to %s." % (template_filename, user_filename))


def return_if_exists(path, create=False):
    path = os.path.abspath(path)
    if os.path.exists(path):
        return path
    elif create:
        f = open(path, "w")
        f.close()
        return path
    raise Exception("File '%s' does not exist or could not be found!" % path)

############
# Singleton!
Path = Paths()

if __name__ == '__main__':
    print ">>> SAVED DIRECTORIES:"
    print ">>> LOCALE DIR:", Path.locale_dir
    print ">>> PIXMAPS DIR:", Path.pixmaps_dir
    print ">>> CONFIG DIR:", Path.config_dir
    print
    print ">>> FILES:"
    print ">>> USER CONFIG FILE:", Path.user_config_file
    print ">>> CONFIG FILE:", Path.user_config_file
    print ">>> TARGET_LIST:", Path.target_list
    print ">>> PROFILE_EDITOR:", Path.profile_editor
    print ">>> SCAN_PROFILE:", Path.scan_profile
    print ">>> RECENT_SCANS:", Path.recent_scans
    print ">>> OPTIONS:", Path.options
    print
    print ">>> DB:", Path.db
    print ">>> VERSION:", Path.version