/
match_counter.py
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/
match_counter.py
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# match_counter.py
# Implements class MatchCounter.
#
# Copyright (C) 2012-2016 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details. You should have received a copy of the
# GNU General Public License along with this program; if not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
from __future__ import absolute_import
from __future__ import print_function
from __future__ import unicode_literals
from functools import reduce
WEIGHTS = {
'name' : 7,
'summary' : 4,
'description' : 2,
'url' : 1,
}
def _canonize_string_set(sset, length):
""" Ordered sset with empty strings prepended. """
current = len(sset)
l = [''] * (length - current) + sorted(sset)
return l
class MatchCounter(dict):
"""Map packages to which of their attributes matched in a search against
what values.
The mapping is: ``package -> [(key, needle), ... ]``.
"""
@staticmethod
def _eval_weights(pkg, matches):
# how much is each match worth and return their sum:
def weight(match):
key = match[0]
needle = match[1]
haystack = getattr(pkg, key)
if key == "name" and haystack == needle:
# if package matches exactly by name, increase weight
return 2 * WEIGHTS[key]