150 lines
5.4 KiB
Python
150 lines
5.4 KiB
Python
from django.utils.text import format_lazy
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from django.utils.translation import gettext_lazy
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def get_chunks(porders, ini, end, ix=0):
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if ix >= len(porders):
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return [[ini, end, []]]
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order = porders[ix]
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ix += 1
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bu = getattr(order, 'new_billed_until', order.billed_until)
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if not bu or bu <= ini or order.registered_on >= end:
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return get_chunks(porders, ini, end, ix=ix)
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result = []
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if order.registered_on < end and order.registered_on > ini:
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ro = order.registered_on
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result = get_chunks(porders, ini, ro, ix=ix)
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ini = ro
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if bu < end:
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result += get_chunks(porders, bu, end, ix=ix)
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end = bu
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chunks = get_chunks(porders, ini, end, ix=ix)
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for chunk in chunks:
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chunk[2].insert(0, order)
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result.append(chunk)
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return result
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def cmp_billed_until_or_registered_on(a, b):
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"""
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1) billed_until greater first
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2) registered_on smaller first
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"""
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if a.billed_until == b.billed_until:
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# Use pk which is more reliable than registered_on date
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return a.id-b.id
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elif a.billed_until and b.billed_until:
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return (b.billed_until-a.billed_until).days
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elif a.billed_until:
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return (b.registered_on-a.billed_until).days
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return (b.billed_until-a.registered_on).days
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class Interval(object):
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def __init__(self, ini, end, order=None):
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self.ini = ini
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self.end = end
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self.order = order
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def __len__(self):
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return max((self.end-self.ini).days, 0)
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def __sub__(self, other):
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remaining = []
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if self.ini < other.ini:
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remaining.append(Interval(self.ini, min(self.end, other.ini), self.order))
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if self.end > other.end:
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remaining.append(Interval(max(self.ini,other.end), self.end, self.order))
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return remaining
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def __repr__(self):
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return "<ini:{ini}/end:{end}>".format(
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ini=self.ini.strftime('%Y-%-m-%-d'),
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end=self.end.strftime('%Y-%-m-%-d')
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)
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def intersect(self, other, remaining_self=None, remaining_other=None):
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if remaining_self is not None:
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remaining_self += (self - other)
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if remaining_other is not None:
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remaining_other += (other - self)
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result = Interval(max(self.ini, other.ini), min(self.end, other.end), self.order)
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if len(result)>0:
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return result
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else:
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return None
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def intersect_set(self, others, remaining_self=None, remaining_other=None):
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intersections = []
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for interval in others:
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intersection = self.intersect(interval, remaining_self, remaining_other)
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if intersection:
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intersections.append(intersection)
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return intersections
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def get_intersections(order_intervals, compensations):
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intersections = []
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for compensation in compensations:
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intersection = compensation.intersect_set(order_intervals)
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length = 0
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for intersection_interval in intersection:
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length += len(intersection_interval)
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intersections.append((length, compensation))
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return sorted(intersections, key=lambda i: i[0])
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def intersect(compensation, order_intervals):
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# Intervals should not overlap
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compensated = []
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not_compensated = []
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unused_compensation = []
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for interval in order_intervals:
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compensated.append(compensation.intersect(interval, unused_compensation, not_compensated))
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return (compensated, not_compensated, unused_compensation)
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def apply_compensation(order, compensation):
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remaining_order = []
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remaining_compensation = []
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applied_compensation = compensation.intersect_set(order, remaining_compensation, remaining_order)
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return applied_compensation, remaining_order, remaining_compensation
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def update_intersections(not_compensated, compensations):
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# TODO can be optimized
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compensation_intervals = []
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for __, compensation in compensations:
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compensation_intervals.append(compensation)
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return get_intersections(not_compensated, compensation_intervals)
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def compensate(order, compensations):
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remaining_interval = [order]
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ordered_intersections = get_intersections(remaining_interval, compensations)
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applied_compensations = []
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remaining_compensations = []
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while ordered_intersections and ordered_intersections[len(ordered_intersections)-1][0]>0:
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# Apply the first compensation:
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__, compensation = ordered_intersections.pop()
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(applied_compensation, remaining_interval, remaining_compensation) = apply_compensation(remaining_interval, compensation)
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remaining_compensations += remaining_compensation
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applied_compensations += applied_compensation
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ordered_intersections = update_intersections(remaining_interval, ordered_intersections)
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for __, compensation in ordered_intersections:
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remaining_compensations.append(compensation)
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return remaining_compensations, applied_compensations
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def get_rate_methods_help_text(rate_class):
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method_help_texts = [
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format_lazy('{}' * 4, *['<br> ', method.verbose_name, ': ', method.help_text])
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for method in rate_class.get_methods().values()
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]
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prefix = gettext_lazy("Algorithm used to interprete the rating table.")
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help_text_items = [prefix] + method_help_texts
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return format_lazy(
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'{}' * len(help_text_items),
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*help_text_items
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)
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