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royalnet/utils/dirty.py

37 lines
862 B
Python

class Dirty:
def __init__(self, initial_value):
self.initial_value = initial_value
self.value = initial_value
def is_clean(self):
return self.initial_value == self.value
def is_dirty(self):
return not self.is_clean()
def __bool__(self):
return self.is_dirty()
class DirtyDelta(Dirty):
@property
def difference(self):
if self.initial_value is None:
initial_value = 0
else:
initial_value = self.initial_value
if self.value is None:
value = 0
else:
value = self.value
return value - initial_value
@property
def delta(self):
return abs(self.difference)
def difference_string(self):
if self.difference > 0:
return f"+{self.difference}"
return self.difference