python/DesignPattern/code/Mediator.py at master · Gary2018X/python · GitHub

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#!/usr/bin/env python
# -*- encoding: utf-8 -*-
# @Time    :   2022/08/28 16:33:09
# @Author  :   Gary
# @Email   :   None
class colleague():
    # 抽象同事类
    mediator = None

    def __init__(self, mediator):
        self.mediator = mediator


class purchaseColleague(colleague):
    # 具体同事类 采购
    def buyStuff(self, num):
        print("PURCHASE:Bought %s" % num)
        self.mediator.execute("buy", num)

    def getNotice(self, content):
        print("PURCHASE:Get Notice--%s" % content)


class warehouseColleague(colleague):
    # 具体同事类 仓库管理员
    total = 0
    threshold = 100

    def setThreshold(self, threshold):
        self.threshold = threshold

    def isEnough(self):
        if self.total < self.threshold:
            print("WAREHOUSE:Warning...Stock is low... ")
            self.mediator.execute("warning", self.total)
            return False
        else:
            return True

    def inc(self, num):
        self.total += num
        print("WAREHOUSE:Increase %s" % num)
        self.mediator.execute("increase", num)
        self.isEnough()

    def dec(self, num):
        if num > self.total:
            print("WAREHOUSE:Error...Stock is not enough")
        else:
            self.total -= num
            print("WAREHOUSE:Decrease %s" % num)
            self.mediator.execute("decrease", num)
        self.isEnough()


class salesColleague(colleague):
    # 具体同事类 销售
    def sellStuff(self, num):
        print("SALES:Sell %s" % num)
        self.mediator.execute("sell", num)

    def getNotice(self, content):
        print("SALES:Get Notice--%s" % content)


class abstractMediator():
    # 抽象中介者类
    purchase = ""
    sales = ""
    warehouse = ""

    def setPurchase(self, purchase):
        self.purchase = purchase

    def setWarehouse(self, warehouse):
        self.warehouse = warehouse

    def setSales(self, sales):
        self.sales = sales

    def execute(self, content, num):
        pass


class stockMediator(abstractMediator):
    # 具体中介者类
    def execute(self, content, num):
        print("MEDIATOR:Get Info--%s" % content)
        if content == "buy":
            self.warehouse.inc(num)
            self.sales.getNotice("Bought %s" % num)
        elif content == "increase":
            self.sales.getNotice("Inc %s" % num)
            self.purchase.getNotice("Inc %s" % num)
        elif content == "decrease":
            self.sales.getNotice("Dec %s" % num)
            self.purchase.getNotice("Dec %s" % num)
        elif content == "warning":
            self.sales.getNotice("Stock is low.%s Left." % num)
            self.purchase.getNotice(
                "Stock is low. Please Buy More!!! %s Left" % num)
        elif content == "sell":
            self.warehouse.dec(num)
            self.purchase.getNotice("Sold %s" % num)
        else:
            pass


if __name__ == "__main__":
    mobile_mediator = stockMediator()  # 先配置
    mobile_purchase = purchaseColleague(mobile_mediator)
    mobile_warehouse = warehouseColleague(mobile_mediator)
    mobile_sales = salesColleague(mobile_mediator)
    mobile_mediator.setPurchase(mobile_purchase)
    mobile_mediator.setWarehouse(mobile_warehouse)
    mobile_mediator.setSales(mobile_sales)

    mobile_warehouse.setThreshold(200)
    mobile_purchase.buyStuff(300)
    mobile_sales.sellStuff(120)