Library_Project/demo/DesignerPattern/ObserverPattern/ObserverPattern.cpp

#include "ObserverPattern.h"




void AbstractNewsAgency::addObserver(AbstractObserver* observer)
{
    m_listObservers.push_back(observer);
}

void AbstractNewsAgency::removeObserver(AbstractObserver* observer)
{
    m_listObservers.remove(observer);
}


void MorgensNewsAgency::notifyObservers(std::string news)
{
    SPDLOG_INFO("摩根斯新闻社报纸的订阅者一共有: {} 位", m_listObservers.size());
    for (auto observer : m_listObservers)
    {
        observer->update(news);
    }
}

void GossipNewsAgency::notifyObservers(std::string news)
{
    SPDLOG_INFO("八卦新闻社报纸的订阅者一共有: {} 位", m_listObservers.size());
    for (auto observer : m_listObservers)
    {
        observer->update(news);
    }
}



void testObserverPattern()
{
    /* 创建新闻社 */
    MorgensNewsAgency* morgensAgency = new MorgensNewsAgency();
    GossipNewsAgency* gossipAgency = new GossipNewsAgency();
    /* 创建订阅者 */
    AbstractObserver* observerA = new Dragon("蒙奇·D·龙", morgensAgency);
    AbstractObserver* observerB = new Shanks("香克斯", morgensAgency);
    AbstractObserver* observerC = new Bartolomeo("巴托洛米奥", gossipAgency);

    /* 发布新闻 */
    morgensAgency->notifyObservers("蒙奇·D·路飞成为新世界的新的四皇之一, 赏金30亿贝里!!!");
    SPDLOG_INFO("=========================================");
    gossipAgency->notifyObservers("女帝汉库克想要嫁给路飞, 给路飞生猴子, 哈哈哈...");

    delete observerA;
    delete observerB;
    delete observerC;
    delete morgensAgency;
    delete gossipAgency;
}