def get_resource_occupations_in_dt_range(dt_range, service_recipe, resources):
"""
Return a list of resource occupations (res, dt_range) in given dt_range
return None when no resources can be allocated.
"""
new_resource_occupations = []
for resource_needed in service_recipe:
candidate_resources = filter(
lambda r: r['type'] == resource_needed['type'],
resources)
for period in resource_needed['delta_periods']:
period_dt_range = by_timedelta_range(period, dt_range[0])
new_res_occupations_for_type = filter(
lambda r: r[0]['type'] == resource_needed['type'],
new_resource_occupations)
available_resource = get_resource_available_in_dt_range(
candidate_resources, period_dt_range,
new_res_occupations_for_type)
if available_resource is None:
return None
new_resource_occupations.append(
(clean_resource(available_resource), period_dt_range))
return new_resource_occupations
def calculate_ranges(period, availability, service_recipe, resources):
"""
Calculates available time ranges and resulting resources configuration,
given:
* period: tuple of two datetimes
* availability: dict describing global shop availability
* service_recipe: list of needed resources and relative timings
* resources: availability (from configuration)
and occupation (from allocated services) of each resource
"""
ranges = []
period_start_dt, period_end_dt = period
delta_duration = get_service_duration(service_recipe)
delta_step = get_service_step(service_recipe)
loop_dt_range = by_timedelta_range((timedelta(0), delta_duration),
period_start_dt)
while contains(period, loop_dt_range):
if not is_datetime_range_available(loop_dt_range, availability):
near_working_dt_range = nearest_working_datetime_range(
loop_dt_range, availability)
if near_working_dt_range is not None:
loop_dt_range = by_timedelta_range(
(timedelta(0), delta_duration), near_working_dt_range[0])
else:
loop_dt_range = by_timedelta_range(
(timedelta(0), delta_duration),
start_of_tomorrow(loop_dt_range[0]))
continue
resource_occupations = get_resource_occupations_in_dt_range(
loop_dt_range, service_recipe, resources)
if resource_occupations:
ranges.append((loop_dt_range, resource_occupations))
# like i++ but more cool
loop_dt_range = by_timedelta_range(
(delta_step, delta_step + delta_duration), loop_dt_range[0])
return ranges
