| # |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| """ FPP (First Past the Post) Based Voting Plugin """ |
| import re, json |
| |
| from lib import constants |
| |
| def validateFPP(vote, issue): |
| "Tries to validate a vote, returns why if not valid, None otherwise" |
| letters = [chr(i) for i in range(ord('a'), ord('a') + len(issue['candidates']))] |
| if len(vote) > 1: |
| return "Vote may only contain one letter!" |
| for char in vote: |
| if char not in letters: |
| return "Invalid characters in vote. Accepted are: %s" % ", ".join(letters) |
| return None |
| |
| |
| def tallyFPP(votes, issue): |
| candidates = [] |
| for c in issue['candidates']: |
| candidates.append(c['name']) |
| |
| |
| debug = [] |
| matrix = {} |
| |
| # Set up counting matrix |
| for key in votes: |
| vote = votes[key] |
| matrix[vote] = (matrix[vote] if vote in matrix else 0) + 1 |
| |
| l = [] |
| for x in matrix: |
| l.append(matrix[x]) |
| |
| cc = [] |
| for x in matrix: |
| if matrix[x] == max(l): |
| cc.append(x) |
| winners = [] |
| winnernames = [] |
| |
| for c in cc: |
| i = ord(c) - ord('a') |
| winners.append(c) |
| winnernames.append(candidates[i]) |
| |
| |
| # Return the data |
| js = { |
| 'votes': len(votes), |
| 'winners': winners, |
| 'winnernames': winnernames, |
| 'winnerpct': ((1.00*max(l)/len(votes))*100) if len(votes) > 0 else 0.00, |
| 'tie': True if len(winners) > 1 else False |
| } |
| |
| return js, """ |
| Winners: |
| - %s |
| """ % "\n - ".join(["%s (%f%%)" % (n,js['winnerpct']) for n in winnernames]) |
| |
| |
| constants.appendVote ( |
| { |
| 'key': "fpp", |
| 'description': "First Past the Post (FPP) Election", |
| 'category': 'fpp', |
| 'validate_func': validateFPP, |
| 'vote_func': None, |
| 'tally_func': tallyFPP |
| }, |
| ) |