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Copy pathfront_controller.py
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95 lines (68 loc) · 2.43 KB
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"""
@author: Gordeev Andrey <gordeev.and.and@gmail.com>
*TL;DR
Provides a centralized entry point that controls and manages request handling.
"""
from __future__ import annotations
from typing import Any
class MobileView:
def show_index_page(self) -> None:
print("Displaying mobile index page")
class TabletView:
def show_index_page(self) -> None:
print("Displaying tablet index page")
class Dispatcher:
def __init__(self) -> None:
self.mobile_view = MobileView()
self.tablet_view = TabletView()
def dispatch(self, request: Request) -> None:
"""
This function is used to dispatch the request based on the type of device.
If it is a mobile, then mobile view will be called and if it is a tablet,
then tablet view will be called.
Otherwise, an error message will be printed saying that cannot dispatch the request.
"""
if request.type == Request.mobile_type:
self.mobile_view.show_index_page()
elif request.type == Request.tablet_type:
self.tablet_view.show_index_page()
else:
print("Cannot dispatch the request")
class RequestController:
"""front controller"""
def __init__(self) -> None:
self.dispatcher = Dispatcher()
def dispatch_request(self, request: Any) -> None:
"""
This function takes a request object and sends it to the dispatcher.
"""
if isinstance(request, Request):
self.dispatcher.dispatch(request)
else:
print("request must be a Request object")
class Request:
"""request"""
mobile_type = "mobile"
tablet_type = "tablet"
def __init__(self, request):
self.type = None
request = request.lower()
if request == self.mobile_type:
self.type = self.mobile_type
elif request == self.tablet_type:
self.type = self.tablet_type
def main():
"""
>>> front_controller = RequestController()
>>> front_controller.dispatch_request(Request('mobile'))
Displaying mobile index page
>>> front_controller.dispatch_request(Request('tablet'))
Displaying tablet index page
>>> front_controller.dispatch_request(Request('desktop'))
Cannot dispatch the request
>>> front_controller.dispatch_request('mobile')
request must be a Request object
"""
if __name__ == "__main__":
import doctest
doctest.testmod()