133 lines
4.5 KiB
Python
133 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright(C) 2010-2011 Christophe Benz
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#
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# This file is part of weboob.
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#
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# weboob 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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# weboob 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 weboob. If not, see <http://www.gnu.org/licenses/>.
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import weboob.tools.date as date_utils
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from weboob.capabilities import UserError
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from datetime import date
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__all__ = ['ResultsCondition', 'ResultsConditionError']
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class IResultsCondition(object):
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def is_valid(self, obj):
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raise NotImplementedError()
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class ResultsConditionError(UserError):
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pass
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class Condition(object):
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def __init__(self, left, op, right):
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self.left = left # Field of the object to test
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self.op = op
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self.right = right
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def is_egal(left, right):
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return left == right
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def is_notegal(left, right):
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return left != right
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def is_sup(left, right):
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return left < right
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def is_inf(left, right):
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return left > right
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def is_in(left, right):
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return left in right
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functions = {'!=': is_notegal, '=': is_egal, '>': is_sup, '<': is_inf, '|': is_in}
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class ResultsCondition(IResultsCondition):
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condition_str = None
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# Supported operators
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# =, !=, <, > for float/int/decimal
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# =, != for strings
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# We build a list of list. Return true if each conditions of one list is TRUE
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def __init__(self, condition_str):
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or_list = []
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for _or in condition_str.split(' OR '):
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and_list = []
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for _and in _or.split(' AND '):
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operator = None
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for op in ['!=', '=', '>', '<', '|']:
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if op in _and:
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operator = op
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break
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if operator is None:
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raise ResultsConditionError(u'Could not find a valid operator in sub-expression "%s". Protect the complete condition expression with quotes, or read the documentation in the man manual.' % _and)
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try:
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l, r = _and.split(operator)
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except ValueError:
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raise ResultsConditionError(u'Syntax error in the condition expression, please check documentation')
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and_list.append(Condition(l, operator, r))
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or_list.append(and_list)
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self.condition = or_list
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self.condition_str = condition_str
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def is_valid(self, obj):
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d = obj.to_dict()
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# We evaluate all member of a list at each iteration.
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for _or in self.condition:
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myeval = True
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for condition in _or:
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if condition.left in d:
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# in the case of id, test id@backend and id
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if condition.left == 'id':
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tocompare = condition.right
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evalfullid = functions[condition.op](tocompare, d['id'])
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evalid = functions[condition.op](tocompare, obj.id)
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myeval = evalfullid or evalid
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else:
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# We have to change the type of v, always gived as string by application
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typed = type(d[condition.left])
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try:
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if isinstance(d[condition.left], date_utils.date):
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tocompare = date(*[int(x) for x in condition.right.split('-')])
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else:
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tocompare = typed(condition.right)
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myeval = functions[condition.op](tocompare, d[condition.left])
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except:
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myeval = False
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else:
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raise ResultsConditionError(u'Field "%s" is not valid.' % condition.left)
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# Do not try all AND conditions if one is false
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if not myeval:
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break
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# Return True at the first OR valid condition
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if myeval:
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return True
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# If we are here, all OR conditions are False
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return False
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def __str__(self):
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return unicode(self).encode('utf-8')
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def __unicode__(self):
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return self.condition_str
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