Synnefo » ./kamaki

#!/usr/bin/env python

# Copyright 2012 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

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def order_free_contains(containing, contained):

    superset = containing.split()

    for term in contained.split():

        if term not in superset:

            return False

    return True

class History(object):

    def __init__(self, filepath):

        self.filepath = filepath

    @classmethod

    def _match(self, line, match_terms):

        if match_terms is None:

            return True

        for term in match_terms.split():

            if term not in line:

                return False

        return True

    def get(self, match_terms=None, limit=0):

        f = open(self.filepath, 'r')

        result = ['%s.  \t%s' % (index + 1, line)\

            for index, line in enumerate(f.readlines())\

            if self._match(line, match_terms)]

        offset = len(result) - limit if limit and len(result) > limit else 0

        return result[offset:]

    def add(self, line):

        f = open(self.filepath, 'a+')

        f.write(line + '\n')

        f.close()

    def clean(self):

        f = open(self.filepath, 'w')

        f.close()

    def retrieve(self, cmd_id):

        """

        :param cmd_id: (int) the id of the command to retrieve

        :returns: (str) the stored command record without the id

        """

        with open(self.filepath) as f:

            for line in f.readlines():

                if line.startswith('%s ' % cmd_id):

                    return line[4:]

        return None