def cmp_observation(x, y):
"""
for a given COBservation, do the following.
1: If it's an addendum/reconciliation trumps all
2: If it's direct, and other is not direct, the direct wins
3: If both direct, do by earliest date
4: If neither direct, do by earliest encounter_date regardless of method.
< -1
= 0
> 1
Assumes that x and y have the same observation date (cell in the DOT json array)
Encounter date is the date in which the date cell is observed.
"""
assert x.observed_date.date() == y.observed_date.date()
x_is_reconciliation = getattr(x, 'is_reconciliation', None)
y_is_reconciliation = getattr(y, 'is_reconciliation', None)
# Reconciliation handling
# reconciliations always win.
if x_is_reconciliation and y_is_reconciliation:
# sort by earlier date, so flip x,y
return cmp(y.submitted_date, x.submitted_date)
elif x_is_reconciliation and not y_is_reconciliation:
# result: x > y
return 1
elif not x_is_reconciliation and y_is_reconciliation:
# result: x < y
return -1
elif x.method == DOT_OBSERVATION_DIRECT and y.method == DOT_OBSERVATION_DIRECT:
# Direct observations win next
# sort by earlier date, so flip x,y
return cmp(y.encounter_date, x.encounter_date)
elif x.method == DOT_OBSERVATION_DIRECT and y.method != DOT_OBSERVATION_DIRECT:
# result: x > y
return 1
elif x.method != DOT_OBSERVATION_DIRECT and y.method == DOT_OBSERVATION_DIRECT:
# result: x < y
return -1
elif (x.adherence, x.method) == DOT_UNCHECKED_CELL and (y.adherence, y.method) != DOT_UNCHECKED_CELL:
# unchecked should always lose
return -1
elif (x.adherence, x.method) != DOT_UNCHECKED_CELL and (y.adherence, y.method) == DOT_UNCHECKED_CELL:
return 1
else:
return cmp(y.encounter_date, x.encounter_date)
def action_cmp(first_action, second_action):
# compare server dates if the forms aren't submitted by the same user
if first_action.user_id != second_action.user_id:
return cmp(first_action.server_date, second_action.server_date)
if first_action.xform_id and first_action.xform_id == second_action.xform_id:
# short circuit if they are from the same form
return cmp(type_index(first_action.action_type),
type_index(second_action.action_type))
if not (first_action.server_date and second_action.server_date
and first_action.date and second_action.date):
raise MissingServerDate()
if abs(first_action.server_date -
second_action.server_date) > const.SIGNIFICANT_TIME:
return cmp(first_action.server_date, second_action.server_date)
return cmp(sort_key(first_action), sort_key(second_action))
def _compare_submissions(x, y):
# these are backwards because we want most recent to come first
return cmp(y.received_on, x.received_on)