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path: root/src/server/ChatServer.cpp
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#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

#include "ChatServer.hpp"
#include "UserInfo.hpp"
#include "ChatRoom.hpp"

const int qlen_for_listen = 6;

ChatServer::ChatServer(EventSelector *sel, DatabaseManager *db, int fd)
    : FdHandler(fd), the_selector(sel), dbase(db)
{
    the_selector->Add(this);
    lobby = new ChatRoom(this, std_id_lobby, 0);
}

ChatServer::~ChatServer()
{
    if(room)
        delete[] room;

    the_selector->Remove(this);
}

ChatServer *ChatServer::Start(EventSelector *sel, DatabaseManager *db, int port)
{
    int in_d = socket(AF_INET, SOCK_STREAM, 0);
    if(in_d == -1)
        return 0;

    int opt = 1;
    setsockopt(in_d, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));

    struct sockaddr_in addr;
    addr.sin_family = AF_INET;
    addr.sin_addr.s_addr = htonl(INADDR_ANY);
    addr.sin_port = htons(port);

    int res = bind(in_d, (struct sockaddr*) &addr, sizeof(addr));
    if(res == -1)
        return 0;

    res = listen(in_d, qlen_for_listen);
    if(res == -1)
        return 0;
    
    return new ChatServer(sel, db, in_d);
}

int ChatServer::AddRoom(char *password)
{
    if(!room) {
        room_len = 16;
        room = new ChatRoom*[room_len];
        for(int i = 0; i < room_len; i++) 
            room[i] = 0;
    }

    int id = -1;
    for(int i = 0; i < room_len; i++) {
        if(room[i] == 0) {
            id = i;
            room[i] = new ChatRoom(this, id, password);
            break;
        }
    }

    if(id == -1) {
        ChatRoom **tmp = new ChatRoom*[room_len+1];
        for(int i = 0; i < room_len; i++)
            tmp[i] = room[i];

        id = room_len;
        tmp[room_len] = new ChatRoom(this, id, password);
        room_len += 1;

        delete[] room;
        room = tmp;
    }

    return id;
}

bool ChatServer::DeleteRoom(int id)
{
    if(!room[id])
        return false;

    delete room[id];
    room[id] = 0;

    return true;
}

bool ChatServer::RoomExist(int id) const
{
    if(!room[id])
        return false;
 
    return true;
}

void ChatServer::GotoLobby(ChatRoom *cur_room, UserInfo *u)
{
    cur_room->RemoveSession(u);
    lobby->AddSession(u);
    u->SetRoom(lobby);
}

handle_room_enter ChatServer::ChangeSessionRoom(ChatRoom *cur_room,
    UserInfo *u, int id, char *pass)
{
    if(id < 0 || id >= room_len || !room[id])
        return enter_noexist;

    const char *secret_word = room[id]->GetSecretPass();
    CONSOLE_LOG("right pass: %s; user enter pass: %s\n", secret_word, pass);
    if(secret_word != 0) {
        if(!pass)
            return enter_private;
        if(strcmp(secret_word, pass) != 0)
            return enter_uncorrect_pass;
    }

    cur_room->RemoveSession(u);
    room[id]->AddSession(u);
    u->SetRoom(room[id]);
    return enter_success;
}

void ChatServer::CloseConnection(UserInfo *u) 
{
    the_selector->Remove(u);
    delete u;
}

void ChatServer::Handle(bool r, bool w)
{
    if(!r)
        return;

    struct sockaddr_in addr;
    socklen_t len = sizeof(addr);
    int sd = accept(GetFd(), (struct sockaddr*) &addr, &len);
    if(sd == -1)
        return;

    UserInfo *u = new UserInfo(lobby, sd);
    lobby->AddSession(u);
    the_selector->Add(u);
}