def get_resource_available_in_dt_range(candidate_resources, dt_range,
new_resource_occupations):
"""
Try to find a resource available in dt_range, if no resource finded return
None.
"""
for resource in candidate_resources:
# Only occupations of current resource
res_new_occupations = [y[1] for y in filter(
lambda x: x[0] == clean_resource(resource),
new_resource_occupations)]
# Check availability
availability = resource.get('availability')
if (availability and not is_datetime_range_available(dt_range,
availability)):
continue
# Check occupations
occupations = resource.get('occupations', []) + res_new_occupations
overlappings = [overlaps(dt_range, o) for o in occupations]
if any(overlappings):
continue
return resource
return None
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
