90 lines
3.1 KiB
Python
90 lines
3.1 KiB
Python
import inspect
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from orchestra.apps.accounts.models import Account
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def get_related_objects(origin, max_depth=2):
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"""
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Introspects origin object and return the first related service object
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WARNING this is NOT an exhaustive search but a compromise between cost and
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flexibility. A more comprehensive approach may be considered if
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a use-case calls for it.
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"""
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def related_iterator(node):
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for field in node._meta.virtual_fields:
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if hasattr(field, 'ct_field'):
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yield getattr(node, field.name)
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for field in node._meta.fields:
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if field.rel:
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yield getattr(node, field.name)
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# BFS model relation transversal
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queue = [[origin]]
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while queue:
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models = queue.pop(0)
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if len(models) > max_depth:
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return None
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node = models[-1]
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if len(models) > 1:
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if hasattr(node, 'account') or isinstance(node, Account):
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return node
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for related in related_iterator(node):
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if related and related not in models:
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new_models = list(models)
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new_models.append(related)
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queue.append(new_models)
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def get_register_or_cancel_events(porders, order, ini, end):
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assert ini <= end, "ini > end"
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CANCEL = 'cancel'
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REGISTER = 'register'
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changes = {}
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counter = 0
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for num, porder in enumerate(porders.order_by('registered_on')):
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if porder == order:
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position = num
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if porder.cancelled_on:
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cancel = porder.cancelled_on
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if porder.billed_until and porder.cancelled_on < porder.billed_until:
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cancel = porder.billed_until
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if cancel > ini and cancel < end:
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changes.setdefault(cancel, [])
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changes[cancel].append((CANCEL, num))
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if porder.registered_on <= ini:
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counter += 1
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elif porder.registered_on < end:
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changes.setdefault(porder.registered_on, [])
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changes[porder.registered_on].append((REGISTER, num))
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pointer = ini
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total = float((end-ini).days)
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for date in sorted(changes.keys()):
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yield counter, position, (date-pointer).days/total
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for change, num in changes[date]:
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if change is CANCEL:
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counter -= 1
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if num < position:
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position -= 1
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else:
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counter += 1
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pointer = date
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yield counter, position, (end-pointer).days/total
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def get_register_or_renew_events(handler, porders, order, ini, end):
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total = float((end-ini).days)
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for sini, send in handler.get_pricing_slots(ini, end):
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counter = 0
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position = 0
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for porder in porders.order_by('registered_on'):
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if porder == order:
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position = abs(position)
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elif position < 0:
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position -= 1
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if porder.registered_on >= sini and porder.registered_on < send:
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counter += 1
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elif porder.billed_until > send or porder.cancelled_on > send:
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counter += 1
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yield counter, position, (send-sini)/total
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