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#!/usr/bin/env python
from typing import Optional
from typing import Callable
from doorstop import common
from doorstop.gui.action import Action
from doorstop.gui.state import State
from doorstop.gui.reducer import Reducer
log = common.logger(__name__)
class Store(object):
@property
def state(self) -> Optional[State]:
return self.__state
def __init__(self, reducer: Reducer, initial_state: Optional[State] = None) -> None:
self.__observer = []
self.__state = initial_state
self.__reducer = reducer
def add_observer(self, observer: Callable[["Store"], None]) -> None:
self.__observer.append(observer)
observer(self)
def remove_observer(self, observer: Callable[["Store"], None]) -> None:
self.__observer.remove(observer)
def dispatch(self, action: Action) -> None:
new_state = self.__reducer.reduce(self.state, action)
if new_state != self.__state:
log.info(action.__class__.__name__)
self.__state = new_state
for curr_observer in self.__observer:
curr_observer(self)
jacebrowning /
doorstop
