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

# ***********************IMPORTANT NMAP LICENSE TERMS************************
# *                                                                         *
# * The Nmap Security Scanner is (C) 1996-2020 Insecure.Com LLC ("The Nmap  *
# * Project"). Nmap is also a registered trademark of the Nmap Project.     *
# *                                                                         *
# * This program is distributed under the terms of the Nmap Public Source   *
# * License (NPSL). The exact license text applying to a particular Nmap    *
# * release or source code control revision is contained in the LICENSE     *
# * file distributed with that version of Nmap or source code control       *
# * revision. More Nmap copyright/legal information is available from       *
# * https://nmap.org/book/man-legal.html, and further information on the    *
# * NPSL license itself can be found at https://nmap.org/npsl. This header  *
# * summarizes some key points from the Nmap license, but is no substitute  *
# * for the actual license text.                                            *
# *                                                                         *
# * Nmap is generally free for end users to download and use themselves,    *
# * including commercial use. It is available from https://nmap.org.        *
# *                                                                         *
# * The Nmap license generally prohibits companies from using and           *
# * redistributing Nmap in commercial products, but we sell a special Nmap  *
# * OEM Edition with a more permissive license and special features for     *
# * this purpose. See https://nmap.org/oem                                  *
# *                                                                         *
# * If you have received a written Nmap license agreement or contract       *
# * stating terms other than these (such as an Nmap OEM license), you may   *
# * choose to use and redistribute Nmap under those terms instead.          *
# *                                                                         *
# * The official Nmap Windows builds include the Npcap software             *
# * (https://npcap.org) for packet capture and transmission. It is under    *
# * separate license terms which forbid redistribution without special      *
# * permission. So the official Nmap Windows builds may not be              *
# * redistributed without special permission (such as an Nmap OEM           *
# * license).                                                               *
# *                                                                         *
# * 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 submit your         *
# * changes as a Github PR or by email to the dev@nmap.org mailing list     *
# * for possible incorporation into the main distribution. Unless you       *
# * specify otherwise, it is understood that you are offering us very       *
# * broad rights to use your submissions as described in the Nmap Public    *
# * Source License Contributor Agreement. This is important because we      *
# * fund the project by selling licenses with various terms, and also       *
# * because the inability to relicense code has caused devastating          *
# * problems for other Free Software projects (such as KDE and NASM).       *
# *                                                                         *
# * The free version of Nmap 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. Warranties,        *
# * indemnification and commercial support are all available through the    *
# * Npcap OEM program--see https://nmap.org/oem.                            *
# *                                                                         *
# ***************************************************************************/

import gtk


class ScansListStoreEntry(object):
    """This class is an abstraction for running and completed scans, which are
    otherwise represented by very different classes."""

    # Possible states for the scan to be in.
    UNINITIALIZED, RUNNING, FINISHED, FAILED, CANCELED = range(5)

    def __init__(self):
        self.state = self.UNINITIALIZED
        self.command = None
        self.parsed = None

    def set_running(self, command=None):
        self.state = self.RUNNING
        self.command = command

    def set_finished(self, parsed=None):
        self.state = self.FINISHED
        self.parsed = parsed

    def set_failed(self):
        self.state = self.FAILED

    def set_canceled(self):
        self.state = self.CANCELED

    def get_command_string(self):
        if self.parsed is not None:
            return self.parsed.get_nmap_command()
        elif self.command is not None:
            return self.command.command
        else:
            return None

    running = property(lambda self: self.state == self.RUNNING)
    finished = property(lambda self: self.state == self.FINISHED)
    failed = property(lambda self: self.state == self.FAILED)
    canceled = property(lambda self: self.state == self.CANCELED)


class ScansListStore(gtk.ListStore):
    """This is a specialization of a gtk.ListStore that holds running,
    completed, and failed scans."""
    def __init__(self):
        gtk.ListStore.__init__(self, object)

    def add_running_scan(self, command):
        """Add a running NmapCommand object to the list of scans."""
        entry = ScansListStoreEntry()
        entry.set_running(command)
        return self.append([entry])

    def finish_running_scan(self, command, parsed):
        """Find an existing NmapCommand object and replace it with the given
        parsed representation."""
        i = self._find_running_scan(command)
        if i is not None:
            entry = self.get_value(i, 0)
            entry.set_finished(parsed)
            path = self.get_path(i)
            self.row_changed(path, i)
            return i

    def fail_running_scan(self, command):
        """Mark a running scan as failed."""
        i = self._find_running_scan(command)
        if i is not None:
            entry = self.get_value(i, 0)
            entry.set_failed()
            path = self.get_path(i)
            self.row_changed(path, i)
            return i

    def cancel_running_scan(self, command):
        """Mark a running scan as canceled."""
        i = self._find_running_scan(command)
        if i is not None:
            entry = self.get_value(i, 0)
            entry.set_canceled()
            path = self.get_path(i)
            self.row_changed(path, i)
            return i

    def add_scan(self, parsed):
        """Add a parsed NmapParser object to the list of scans."""
        entry = ScansListStoreEntry()
        entry.set_finished(parsed)
        return self.append([entry])

    def _find_running_scan(self, command):
        """Find the scan entry whose command is command."""
        i = self.get_iter_first()
        while i is not None:
            entry = self.get_value(i, 0)
            if entry.command is command:
                return i
            i = self.iter_next(i)
        return None
