134 lines
4.8 KiB
Python
134 lines
4.8 KiB
Python
def get_chunks(porders, ini, end, ix=0):
|
|
if ix >= len(porders):
|
|
return [[ini, end, []]]
|
|
order = porders[ix]
|
|
ix += 1
|
|
bu = getattr(order, 'new_billed_until', order.billed_until)
|
|
if not bu or bu <= ini or order.registered_on >= end:
|
|
return get_chunks(porders, ini, end, ix=ix)
|
|
result = []
|
|
if order.registered_on < end and order.registered_on > ini:
|
|
ro = order.registered_on
|
|
result = get_chunks(porders, ini, ro, ix=ix)
|
|
ini = ro
|
|
if bu < end:
|
|
result += get_chunks(porders, bu, end, ix=ix)
|
|
end = bu
|
|
chunks = get_chunks(porders, ini, end, ix=ix)
|
|
for chunk in chunks:
|
|
chunk[2].insert(0, order)
|
|
result.append(chunk)
|
|
return result
|
|
|
|
|
|
def cmp_billed_until_or_registered_on(a, b):
|
|
"""
|
|
1) billed_until greater first
|
|
2) registered_on smaller first
|
|
"""
|
|
if a.billed_until == b.billed_until:
|
|
# Use pk which is more reliable than registered_on date
|
|
return a.id-b.id
|
|
elif a.billed_until and b.billed_until:
|
|
return (b.billed_until-a.billed_until).days
|
|
elif a.billed_until:
|
|
return (b.registered_on-a.billed_until).days
|
|
return (b.billed_until-a.registered_on).days
|
|
|
|
|
|
class Interval(object):
|
|
def __init__(self, ini, end, order=None):
|
|
self.ini = ini
|
|
self.end = end
|
|
self.order = order
|
|
|
|
def __len__(self):
|
|
return max((self.end-self.ini).days, 0)
|
|
|
|
def __sub__(self, other):
|
|
remaining = []
|
|
if self.ini < other.ini:
|
|
remaining.append(Interval(self.ini, min(self.end, other.ini), self.order))
|
|
if self.end > other.end:
|
|
remaining.append(Interval(max(self.ini,other.end), self.end, self.order))
|
|
return remaining
|
|
|
|
def __repr__(self):
|
|
return "Start: {ini} End: {end}".format(
|
|
ini=self.ini.strftime('%Y-%-m-%-d'),
|
|
end=self.end.strftime('%Y-%-m-%-d')
|
|
)
|
|
|
|
def intersect(self, other, remaining_self=None, remaining_other=None):
|
|
if remaining_self is not None:
|
|
remaining_self += (self - other)
|
|
if remaining_other is not None:
|
|
remaining_other += (other - self)
|
|
result = Interval(max(self.ini, other.ini), min(self.end, other.end), self.order)
|
|
if len(result)>0:
|
|
return result
|
|
else:
|
|
return None
|
|
|
|
def intersect_set(self, others, remaining_self=None, remaining_other=None):
|
|
intersections = []
|
|
for interval in others:
|
|
intersection = self.intersect(interval, remaining_self, remaining_other)
|
|
if intersection:
|
|
intersections.append(intersection)
|
|
return intersections
|
|
|
|
|
|
def get_intersections(order_intervals, compensations):
|
|
intersections = []
|
|
for compensation in compensations:
|
|
intersection = compensation.intersect_set(order_intervals)
|
|
length = 0
|
|
for intersection_interval in intersection:
|
|
length += len(intersection_interval)
|
|
intersections.append((length, compensation))
|
|
intersections.sort()
|
|
return intersections
|
|
|
|
|
|
def intersect(compensation, order_intervals):
|
|
# Intervals should not overlap
|
|
compensated = []
|
|
not_compensated = []
|
|
unused_compensation = []
|
|
for interval in order_intervals:
|
|
compensated.append(compensation.intersect(interval, unused_compensation, not_compensated))
|
|
return (compensated, not_compensated, unused_compensation)
|
|
|
|
|
|
def apply_compensation(order, compensation):
|
|
remaining_order = []
|
|
remaining_compensation = []
|
|
applied_compensation = compensation.intersect_set(order, remaining_compensation, remaining_order)
|
|
return applied_compensation, remaining_order, remaining_compensation
|
|
|
|
|
|
def update_intersections(not_compensated, compensations):
|
|
# TODO can be optimized
|
|
compensation_intervals = []
|
|
for __, compensation in compensations:
|
|
compensation_intervals.append(compensation)
|
|
return get_intersections(not_compensated, compensation_intervals)
|
|
|
|
|
|
def compensate(order, compensations):
|
|
remaining_interval = [order]
|
|
ordered_intersections = get_intersections(remaining_interval, compensations)
|
|
applied_compensations = []
|
|
remaining_compensations = []
|
|
while ordered_intersections and ordered_intersections[len(ordered_intersections)-1][0]>0:
|
|
# Apply the first compensation:
|
|
__, compensation = ordered_intersections.pop()
|
|
(applied_compensation, remaining_interval, remaining_compensation) = apply_compensation(remaining_interval, compensation)
|
|
remaining_compensations += remaining_compensation
|
|
applied_compensations += applied_compensation
|
|
ordered_intersections = update_intersections(remaining_interval, ordered_intersections)
|
|
for __, compensation in ordered_intersections:
|
|
remaining_compensations.append(compensation)
|
|
return remaining_compensations, applied_compensations
|