68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
# pyRCV2: Preferential vote counting
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# Copyright © 2020–2021 Lee Yingtong Li (RunasSudo)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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from pyRCV2.model import Constraint
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def CONException(Exception):
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pass
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def readCON(data, election):
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lines = data.split('\n')
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constraints = {}
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for line in lines:
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if not line:
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continue
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bits = line.split(' ')
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# Read constraint category
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if bits[0].startswith('"'):
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idx = next(i for i in range(len(bits)) if bits[i].endswith('"'))
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category = ' '.join(bits[0:idx+1]).strip('"')
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else:
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idx = 0
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category = bits[0]
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# Read constraint name
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idx += 1
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if bits[idx].startswith('"'):
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idx2 = next(i for i in range(idx, len(bits)) if bits[i].endswith('"'))
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name = ' '.join(bits[idx:idx2+1]).strip('"')
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idx = idx2
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else:
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name = bits[idx]
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# Read min, max
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n_min = int(bits[idx + 1])
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n_max = int(bits[idx + 2])
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# Read candidates
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candidates = []
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for v in bits[idx+3:]:
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candidates.append(election.candidates[int(v)-1])
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if category not in constraints:
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constraints[category] = {}
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if name in constraints[category]:
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raise CONException('Duplicate constraint "' + name + '" in category "' + category + '"')
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constraints[category][name] = Constraint(category, name, n_min, n_max, candidates)
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return constraints
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