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108 lines
3.3 KiB
108 lines
3.3 KiB
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Processor functions
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"""
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from logging import getLogger
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from .utils import IdentitySet
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from .rules import Rule, RemoveMatch
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log = getLogger(__name__).log
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DEFAULT = '__default__'
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POST_PROCESS = -2048
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PRE_PROCESS = 2048
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def _default_conflict_solver(match, conflicting_match):
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"""
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Default conflict solver for matches, shorter matches if they conflicts with longer ones
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:param conflicting_match:
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:type conflicting_match:
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:param match:
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:type match:
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:return:
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:rtype:
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"""
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if len(conflicting_match.initiator) < len(match.initiator):
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return conflicting_match
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if len(match.initiator) < len(conflicting_match.initiator):
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return match
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return None
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class ConflictSolver(Rule):
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"""
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Remove conflicting matches.
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"""
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priority = PRE_PROCESS
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consequence = RemoveMatch
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@property
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def default_conflict_solver(self): # pylint:disable=no-self-use
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"""
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Default conflict solver to use.
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"""
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return _default_conflict_solver
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def when(self, matches, context):
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# pylint:disable=too-many-nested-blocks
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to_remove_matches = IdentitySet()
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public_matches = [match for match in matches if not match.private]
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public_matches.sort(key=len)
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for match in public_matches:
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conflicting_matches = matches.conflicting(match)
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if conflicting_matches:
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# keep the match only if it's the longest
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conflicting_matches = [conflicting_match for conflicting_match in conflicting_matches if
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not conflicting_match.private]
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conflicting_matches.sort(key=len)
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for conflicting_match in conflicting_matches:
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conflict_solvers = [(self.default_conflict_solver, False)]
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if match.conflict_solver:
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conflict_solvers.append((match.conflict_solver, False))
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if conflicting_match.conflict_solver:
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conflict_solvers.append((conflicting_match.conflict_solver, True))
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for conflict_solver, reverse in reversed(conflict_solvers):
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if reverse:
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to_remove = conflict_solver(conflicting_match, match)
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else:
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to_remove = conflict_solver(match, conflicting_match)
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if to_remove == DEFAULT:
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continue
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if to_remove and to_remove not in to_remove_matches:
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both_matches = [match, conflicting_match]
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both_matches.remove(to_remove)
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to_keep = both_matches[0]
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if to_keep not in to_remove_matches:
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log(self.log_level, "Conflicting match %s will be removed in favor of match %s",
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to_remove, to_keep)
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to_remove_matches.add(to_remove)
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break
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return to_remove_matches
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class PrivateRemover(Rule):
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"""
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Removes private matches rule.
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"""
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priority = POST_PROCESS
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consequence = RemoveMatch
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def when(self, matches, context):
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return [match for match in matches if match.private]
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