history.py 2.92 KB
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#!/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,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and
# documentation are those of the authors and should not be
# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.

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def order_free_contains(containing, contained):
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    superset = containing.split()
    for term in contained.split():
        if term not in superset:
            return False
    return True

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class History(object):
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    def __init__(self, filepath):
        self.filepath = filepath
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    @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
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    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:]
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    def add(self, line):
        f = open(self.filepath, 'a+')
        f.write(line + '\n')
        f.close()
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    def clean(self):
        f = open(self.filepath, 'w')
        f.close()
Stavros Sachtouris's avatar
Stavros Sachtouris committed
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    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