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condition.py
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condition.py
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'''
Created on 27.04.2014
@author: Tobias Ruck
'''
from datetime import datetime
from event import handler_class, listen_to
class _ConditionFunc():
def __init__(self, cls, callback):
self.cls = cls
self.callback = callback
def enqueue(self, village, *params):
return self.cls(village, self.callback, *params)
def condition_changes(cond_cls):
def inner(fn):
return lambda self=None: _ConditionFunc(cond_cls, lambda: fn(self))
return inner
@handler_class
class Condition():
'''
Determines, whether certain conditions are met, and accepts a handler that gets fired upon change
'''
def __init__(self, village, callback=None):
'''
Constructor
'''
self.village = village
self.callback = callback
self.state = False
self.prev_state = False
self.village.conditions.append(self)
def update(self):
pass
def is_true(self):
'''
Returns whether this condition holds/is fulfilled.
'''
return self.state
def check_change(self):
state = self.is_true()
if state != self.prev_state:
if self.callback is not None:
self.callback()
self.prev_state = state
def terminate(self):
self.village.conditions.remove(self)
@handler_class
class ConditionEnoughResources(Condition):
'''
Is true when a certain amount of resources are available in a village.
'''
def __init__(self, village, callback, resources):
super().__init__(village, callback)
self.resources = resources
self.recalc_time()
self.on_resources_spent(None)
def recalc_time(self):
self.time = datetime.now() + self.village.get_production_time(self.resources)
def update(self):
self.recalc_time()
if self.state == False and self.time <= datetime.now():
self.state = self.village.has_enough_resources(self.resources)
self.check_change()
@listen_to('resources_spent', 'build', 'quest_reward')
def on_resources_spent(self, event):
self.state = self.village.has_enough_resources(self.resources)
self.recalc_time()
self.check_change()
@handler_class
class ConditionEnoughSpaceForResources(Condition):
'''
Fires when a village can accept a certain amount of resources without overflow in the storages.
Only used for accepting quest reward.
'''
def __init__(self, village, callback, resources):
super().__init__(village, callback)
self.resources = resources
self.on_spend_resources(None)
@listen_to('resources_spent')
def on_spend_resources(self, event):
self.state = self.village.has_enough_space(self.resources)
self.check_change()
@handler_class
class ConditionBuildSlotAvailable(Condition):
'''
Fires when a building has finished building, and the according slot is free
'''
def __init__(self, village, callback, slot_id):
super().__init__(village, callback)
self.slot_id = slot_id
self.on_build(None)
@listen_to('build')
def on_build(self, event):
events = self.village.get_build_events_for_slot(self.slot_id)
self.state = len(events) == 0
self.check_change()
@handler_class
class ConditionQuestFulfilled(Condition):
'''
Fires when a quest condition is fulfilled.
'''
def __init__(self, village, callback, quest_name):
super().__init__(village, callback)
self.quest_name = quest_name
@listen_to('quest_fulfilled')
def on_quest_fulfilled(self, event):
if event.quest_name == self.quest_name:
self.state = True
self.check_change()
class ConditionAnd(Condition):
def __init(self, callback, conditions):
self.conditions = conditions
if __name__ == '__main__':
from village import Village
from account import Account
from resources import Resources
from event import Event
class K():
@condition_changes(ConditionEnoughSpaceForResources)
def handler_enought_space(self):
print("enough!")
vill = Village(Account((0,0), None), None, None, None)
vill.suppress_refresh = True
vill.resources = Resources((90,0,0,0))
vill.production = Resources((1,0,0,0))
vill.storage_capacity = Resources((100,0,0,0))
vill.next_refresh_time = datetime(2220, 1, 1)
inst = K()
c = inst.handler_enought_space().enqueue(vill, Resources((20,0,0,0)))
print("first check")
vill.fire_event(Event(vill, 'resources_spent', datetime.now()))
print("is true:", c.is_true())
print("second check")
vill.resources = Resources((0,0,0,0))
vill.fire_event(Event(vill, 'resources_spent', datetime.now()))
print("is true:", c.is_true())