//Member.java
package test19;
public abstract class Member {
    protected AbstractChatroom room;
    protected String name;
    public Member(String a){
        name=a;
    }
    public String getname(){
        return name;
    }
    public void setname(String a){
        name=a;
    }
    public AbstractChatroom getroom(){
        return room;
    }
    public void setroom(AbstractChatroom a){
        room=a;
    }
    public abstract void sendtext(String a,String mess);
    public abstract void sendimage(String a,String image);
    public void receivetext(String a,String mess){
        System.out.println(a+"发送的给"+name+"内容是"+mess);
    }
    public void receiveimage(String a,String image){
        System.out.println(a+"发送的给"+name+"内容是"+image);
    }
}
//CommonMember.java
package shiyan19;
public class CommonMember extends Member{
    public CommonMember(String a){
        super(a);
    }
    public void sendtext(String a,String c){
        System.out.println("普通会员发送消息");
        room.sendtext(name,a,c);
    }
    public void sendimage(String a,String c){
        System.out.println("普通会员不能发送图片");
    }
}
//DiamondMember.java
package test19;
public class DiamondMember extends Member{
    public DiamondMember(String a){
        super(a);
    }
    public void sendtext(String a,String c){
        System.out.println("钻石会员发送消息");
        room.sendtext(name,a,c);
    }
    public void sendimage(String a,String c){
        System.out.println("钻石会员发送图片");
        room.sendimage(name,a,c);
    }
}
//NewGroup.java
package test19;
        import java.util.HashMap;
        import java.util.Map;
public class NewGroup extends AbstractChatroom{

    Map<String,Member> table = new HashMap<>();
    public void register(Member member) {
        table.put(member.getname(), member);
        member.setroom(this);
    }

    public void sendtext(String from, String to, String message) {
        if(message.length()>=100){
            System.out.println("超过100个字符，发送失败");
        }else{
            Member member = table.get(to);
            if(member!=null)
                member.receivetext(from, message);
        }
    }

    public void sendimage(String from, String to, String message) {
        if(message.length()>=20){
            System.out.println("图片超过20M，发送失败");
        }else{
            Member member = table.get(to);
            if(member!=null)
                member.receiveimage(from, message);
        }
    }

}
//NewMember.java
package test19;
public class NewMember extends Member{
    public NewMember(String a){
        super(a);
    }
    public void sendtext(String a,String c){
        System.out.println("新会员发送消息：");
        room.sendtext(name,a,c);
    }
    public void sendimage(String a,String c){
        System.out.println("新会员发送图片：");
        room.sendimage(name,a,c);
    }
}
//AbstractChatroom.java
package test19;
public abstract class AbstractChatroom {
    public abstract void register(Member m);
    public abstract void sendtext(String a,String b,String mess);
    public abstract void sendimage(String a,String b,String mess);
}
//ChatGroup.java
package test19;
        import java.util.*;
public class ChatGroup extends AbstractChatroom{
    private Hashtable ms=new Hashtable();
    public void register(Member m)
    {
        if(!ms.contains(m)){
            ms.put(m.getname(),m);
            m.setroom(this);
        }
    }
    public void sendtext(String a,String b,String c){
        Member m=(Member)ms.get(b);
        String newm=c;
        newm=c.replaceAll("日","*");
        m.receivetext(a,newm);
    }
    public void sendimage(String a,String b,String c){
        Member m=(Member)ms.get(b);
        if(c.length()>5){
            System.out.println("图片较大，发送失败");
        }else{
            m.receiveimage(a,c);
        }
    }
}
//main.java
package test19;

public class main {
    public static void main(String args[]){
        AbstractChatroom r1=new NewGroup();
        Member m1,m2,m3;
        m1=new NewMember("adam");
        m2=new NewMember("Lil ghost");
        m3=new NewMember("justin");
        r1.register(m1);
        r1.register(m2);
        r1.register(m3);
        m1.sendtext("Lil ghost","：Hey,bro");
        m2.sendtext("adam","：yoyoyo");
        m1.sendtext("adam","：---------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
        m3.sendimage("adam","：happy.jpg");
        m2.sendimage("Justin","：开心.jpg--------------------");
    }
}