# Copyright(C) 2010-2011 Christophe Benz
#
# This file is part of woob.
#
# woob is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# woob is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with woob. If not, see <http://www.gnu.org/licenses/>.
from woob.capabilities import UserError
__all__ = ['ResultsCondition', 'ResultsConditionError']
class IResultsCondition:
def is_valid(self, obj):
raise NotImplementedError()
[docs]class ResultsConditionError(UserError):
pass
class Condition:
def __init__(self, left, op, right):
self.left = left # Field of the object to test
self.op = op
self.right = right
def is_egal(left, right):
return left == right
def is_notegal(left, right):
return left != right
def is_sup(left, right):
return left < right
def is_inf(left, right):
return left > right
def is_in(left, right):
return left in right
functions = {'!=': is_notegal, '=': is_egal, '>': is_sup, '<': is_inf, '|': is_in}
[docs]class ResultsCondition(IResultsCondition):
condition_str = None
# Supported operators
# =, !=, <, > for float/int/decimal
# =, != for strings
# We build a list of list. Return true if each conditions of one list is TRUE
def __init__(self, condition_str):
self.limit = None
or_list = []
_condition_str = condition_str.split(' LIMIT ')
if len(_condition_str) == 2:
try:
self.limit = int(_condition_str[1])
except ValueError:
raise ResultsConditionError('Syntax error in the condition expression, please check documentation')
condition_str= _condition_str[0]
for _or in condition_str.split(' OR '):
and_list = []
for _and in _or.split(' AND '):
operator = None
for op in ['!=', '=', '>', '<', '|']:
if op in _and:
operator = op
break
if operator is None:
raise ResultsConditionError('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)
try:
l, r = _and.split(operator)
except ValueError:
raise ResultsConditionError('Syntax error in the condition expression, please check documentation')
and_list.append(Condition(l.strip(), operator, r.strip()))
or_list.append(and_list)
self.condition = or_list
self.condition_str = condition_str
[docs] def is_valid(self, obj):
import woob.tools.date as date_utils
import re
from datetime import date, datetime, timedelta
d = obj.to_dict()
# We evaluate all member of a list at each iteration.
for _or in self.condition:
myeval = True
for condition in _or:
if condition.left in d:
# in the case of id, test id@backend and id
if condition.left == 'id':
tocompare = condition.right
evalfullid = functions[condition.op](tocompare, d['id'])
evalid = functions[condition.op](tocompare, obj.id)
myeval = evalfullid or evalid
else:
# We have to change the type of v, always gived as string by application
typed = type(d[condition.left])
try:
if isinstance(d[condition.left], date_utils.date):
tocompare = date(*[int(x) for x in condition.right.split('-')])
elif isinstance(d[condition.left], date_utils.datetime):
splitted_datetime = condition.right.split(' ')
tocompare = datetime(*([int(x) for x in splitted_datetime[0].split('-')] +
[int(x) for x in splitted_datetime[1].split(':')]))
elif isinstance(d[condition.left], timedelta):
time_dict = re.match(r'^\s*((?P<hours>\d+)\s*h)?\s*((?P<minutes>\d+)\s*m)?\s*((?P<seconds>\d+)\s*s)?\s*$',
condition.right).groupdict()
tocompare = timedelta(seconds=int(time_dict['seconds'] or "0"),
minutes=int(time_dict['minutes'] or "0"),
hours=int(time_dict['hours'] or "0"))
else:
tocompare = typed(condition.right)
myeval = functions[condition.op](tocompare, d[condition.left])
except:
myeval = False
else:
raise ResultsConditionError('Field "%s" is not valid.' % condition.left)
# Do not try all AND conditions if one is false
if not myeval:
break
# Return True at the first OR valid condition
if myeval:
return True
# If we are here, all OR conditions are False
return False
def __str__(self):
return self.condition_str
