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IOHandler.py
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IOHandler.py
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import yaml
from Activity import Activity
import Activity as ActivityUtil
from Constraint import Constraint
import Constraint as ConstraintUtil
from TimeInterval import TimeInterval, generate_all_time_intervals
costs = {}
def map_activity_type(scheduling_type):
return {
'exact_interval': ActivityUtil.TYPE_STRICT,
'nr_instances': ActivityUtil.TYPE_INSTANCES,
'relative': ActivityUtil.TYPE_RELATIVE,
}[scheduling_type]
def map_duration(parsed_content):
if 'interval' in parsed_content:
return (parsed_content['interval']['end'] - parsed_content['interval']['start']) * 60
if 'duration' in parsed_content:
factor = {
'minute': 1,
'hour': 60,
'day': 24 * 60,
}[parsed_content['duration']['unit']]
return parsed_content['duration']['value'] * factor
return None
def map_relative_activity_direction(indicator):
return {
'before': ConstraintUtil.RELATIVE_ACTIVITY_DIRECTION_BEFORE,
'after': ConstraintUtil.RELATIVE_ACTIVITY_DIRECTION_AFTER,
}[indicator]
def generate_domain(parsed_content, activity: Activity):
if activity.type == ActivityUtil.TYPE_STRICT:
return [TimeInterval(
parsed_content['interval']['start'],
parsed_content['interval']['end'],
parsed_content['interval']['day']
)]
if activity.type == ActivityUtil.TYPE_INSTANCES:
day = int(activity.name.split('[')[1].split(',')[0]) if activity.instances_per_week == 7 else None
return generate_all_time_intervals(activity.duration, day)
return generate_all_time_intervals(activity.duration)
def compose_activity(content):
restrictions = []
activity_type = map_activity_type(content['scheduling_type'])
if activity_type == ActivityUtil.TYPE_INSTANCES or 'instances_per_day' in content:
instances_per_week = content['instances_per_week'] if 'instances_per_week' in content else 7
generated_activities = []
duration = map_duration(content)
for i in range(1, instances_per_week + 1):
for j in range(1, content['instances_per_day'] + 1):
generated_activities.append(Activity(
name="%s [%d, %d]" % (content['name'], i, j),
duration=duration,
activity_type=activity_type,
restrictions=restrictions,
instances_per_week=instances_per_week,
instances_per_day=content['instances_per_day']
))
return generated_activities
return Activity(
content['name'],
map_duration(content),
map_activity_type(content['scheduling_type']),
restrictions,
)
def generate_strict_constraint(activity: Activity, interval):
return Constraint(
constraint_type=ConstraintUtil.CONSTRAINT_EXACT,
costs=costs,
activity=activity,
strict_interval=TimeInterval(interval['start'], interval['end'], interval['day'])
)
def generate_relative_constraint(activity: Activity, parsed_activity):
direction = -1
for item in parsed_activity:
if item == 'after':
direction = item
break
if item == 'before':
direction = item
break
factor = {
'minute': 1,
'hour': 60,
'day': 24 * 60,
}[parsed_activity[direction]['relative_within']['unit']]
return Constraint(
constraint_type=ConstraintUtil.CONSTRAINT_RELATIVE,
costs=costs,
activity=activity,
relative_activity_direction=map_relative_activity_direction(direction),
relative_activity=parsed_activity[direction]['activity_type'],
distance_from=parsed_activity[direction]['relative_within']['value'] * factor
)
def generate_instances_constraint(activity: Activity, parsed_activity):
return Constraint(
constraint_type=ConstraintUtil.CONSTRAINT_INSTANCES,
costs=costs,
activity=activity,
instances_week=parsed_activity['instances_per_week'],
instances_day=parsed_activity['instances_per_day']
)
def generate_preferred_constraint(activity, interval_list):
return Constraint(
constraint_type=ConstraintUtil.CONSTRAINT_PREFERRED,
costs=costs,
activity=activity,
preferred=interval_list
)
def generate_excluded_constraint(activity, interval_list):
return Constraint(
constraint_type=ConstraintUtil.CONSTRAINT_EXCLUSIVE,
costs=costs,
activity=activity,
excluded=interval_list
)
def generate_distance_constraint(activity, content):
factor = {
'minute': 1,
'hour': 60,
'day': 24 * 60,
}[content['unit']]
return Constraint(
constraint_type=ConstraintUtil.CONSTRAINT_DISTANCE,
costs=costs,
activity=activity,
relative_activity=content['activity_type'] if content['activity_type'] != 'self' else activity.name,
distance_from=content['value'] * factor
)
def compose_constraints(parsed_activity, activity):
constraints = []
if activity.type == ActivityUtil.TYPE_STRICT:
constraints = [generate_strict_constraint(activity, parsed_activity['interval'])]
if activity.type == ActivityUtil.TYPE_RELATIVE:
constraints = [generate_relative_constraint(activity, parsed_activity)]
if activity.type == ActivityUtil.TYPE_INSTANCES:
#constraints = [generate_instances_constraint(activity, parsed_activity)]
for field, content in parsed_activity.items():
if field == 'preferred_intervals':
preferred_list = []
for preferred_interval in content:
day = preferred_interval['interval']['day'] if 'day' in preferred_interval['interval'] else None
start = preferred_interval['interval']['start']
end = preferred_interval['interval']['end']
preferred_list.append(TimeInterval(day=day, start=start, end=end))
constraints.append(generate_preferred_constraint(activity, preferred_list))
if field == 'excluded_intervals':
excluded_list = []
for excluded_interval in content:
day = excluded_interval['interval']['day'] if 'day' in excluded_interval['interval'] else None
start = excluded_interval['interval']['start']
end = excluded_interval['interval']['end']
excluded_list.append(TimeInterval(day=day, start=start, end=end))
constraints.append(generate_excluded_constraint(activity, excluded_list))
if field == 'minimal_distance_from':
for related_activity in content:
constraints.append(generate_distance_constraint(activity, related_activity['activity']))
return constraints
class IOHandler:
def __init__(self, file_path):
self.file = file_path
def read_yaml(self):
stream = open(self.file, 'r')
content = yaml.load(stream)
variables = []
constraints = []
domains = {}
global costs
costs = content['costs']
costs[ConstraintUtil.C_EXACT] = 999999
for parsed_activity in content['activity_list']:
activity_content = parsed_activity['activity']
activity = compose_activity(activity_content)
if type(activity) == list:
variables += activity
for current_activity in activity:
domains[current_activity.name] = generate_domain(activity_content, current_activity)
constraints += compose_constraints(activity_content, activity[0])
else:
variables.append(activity)
domains[activity.name] = generate_domain(activity_content, activity)
constraints += compose_constraints(activity_content, activity)
return variables, domains, constraints