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|
package net
import (
"bufio"
"fmt"
"log"
"net"
"strings"
)
type SessionState int
const (
StateAccountName SessionState = iota
StatePassword
StateNewAccountPass
StateNewAccountConfirm
StateMenu
StateNewCharName
StateNewCharConfirm
StateRenameAccount
StateRenameChar
StateRenameCharName
StateDeleteChar
StatePurgeAccount
StateGame
StateChangeDescription
StateTalk
StateDropAllConfirm
)
type Session struct {
Conn net.Conn
Reader *bufio.Reader
State SessionState
Account *AccountEntry
Player interface{} // *player.Player once character is selected
PendingChar string // char being renamed/deleted
PendingPass string // first password during signup
Disconnecting bool
DisconnectTicks int
}
type AccountEntry struct {
Name string
PasswordHash string
Characters []string
Aliases map[string]string
}
type Server struct {
listener net.Listener
hub *Hub
}
type Hub struct {
sessions map[*Session]bool
rooms map[int]map[*Session]bool
onRemove func(*Session)
}
func NewHub() *Hub {
return &Hub{
sessions: make(map[*Session]bool),
rooms: make(map[int]map[*Session]bool),
}
}
func (h *Hub) OnRemove(cb func(*Session)) {
h.onRemove = cb
}
func (h *Hub) Add(s *Session) {
h.sessions[s] = true
}
func (h *Hub) Remove(s *Session) {
if s.Player != nil && s.State == StateGame && !s.Disconnecting {
s.Disconnecting = true
s.DisconnectTicks = 10
return
}
h.HardRemove(s)
}
func (h *Hub) HardRemove(s *Session) {
delete(h.sessions, s)
for _, room := range h.rooms {
delete(room, s)
}
if h.onRemove != nil {
h.onRemove(s)
}
}
func (h *Hub) EnterRoom(s *Session, roomID int) {
h.LeaveRoom(s)
if h.rooms[roomID] == nil {
h.rooms[roomID] = make(map[*Session]bool)
}
h.rooms[roomID][s] = true
}
func (h *Hub) LeaveRoom(s *Session) {
for _, room := range h.rooms {
delete(room, s)
}
}
func (h *Hub) AllSessions() []*Session {
var out []*Session
for s := range h.sessions {
out = append(out, s)
}
return out
}
func (h *Hub) PlayersInRoom(roomID int) []*Session {
var out []*Session
if room, ok := h.rooms[roomID]; ok {
for s := range room {
out = append(out, s)
}
}
return out
}
func NewServer(addr string) (*Server, error) {
l, err := net.Listen("tcp", addr)
if err != nil {
return nil, err
}
return &Server{listener: l, hub: NewHub()}, nil
}
func (s *Server) Hub() *Hub {
return s.hub
}
func (s *Server) ListenAndServe(handler func(*Session, string)) error {
for {
conn, err := s.listener.Accept()
if err != nil {
return err
}
session := &Session{
Conn: conn,
Reader: bufio.NewReader(conn),
State: StateAccountName,
}
s.hub.Add(session)
go s.handleSession(session, handler)
}
}
func (s *Server) handleSession(session *Session, handler func(*Session, string)) {
defer func() {
if r := recover(); r != nil {
log.Printf("session panic: %v", r)
}
s.hub.Remove(session)
session.Conn.Close()
}()
_, _ = session.Conn.Write([]byte("\033[2J\033[H")) // clear screen
welcomeart := `
, 3333333 333 333 333 3333333 3333333
| 33! 33! 333 33! 33! 333 33! 333 ':. +
-+- * 3!! 3!3!3!3! !!3 3!3!!3! 3!3 !3! '::._ *
| !!: !!: !!! !!: !!: :!! !!: !!! '._)
: : : : : : : : :: : : ,
. * ,
, welcome to third collapse . *
3333333 333333 333 , 333 333333 3333333 333333 33333333
!33 33! 333 33! 33! 33! 333 33! 333 !33 33!
!3! 3!3 !3! 3!! 3!! + 3!3!3!3! 3!33!3! !33!! 3!!!:!
:!! !!: !!! !!: !!: !!: !!! !!: !:! !!:
:: :: : : :. : : ::.: : : ::.: : : : : : ::.: : : :: :::
`
session.Write(welcomeart)
session.Write("ACCOUNT NAME> ")
for {
line, err := session.Reader.ReadString('\n')
if err != nil {
log.Printf("session read error: %v", err)
return
}
line = strings.TrimSpace(line)
handler(session, line)
}
}
func (sess *Session) Write(msg string) {
_, _ = sess.Conn.Write([]byte(msg))
}
func (sess *Session) WriteLine(msg string) {
_, _ = sess.Conn.Write([]byte(msg + "\r\n"))
}
func (sess *Session) WriteLines(lines ...string) {
for _, l := range lines {
sess.WriteLine(l)
}
}
func (sess *Session) Writef(format string, args ...interface{}) {
sess.Write(fmt.Sprintf(format, args...))
}
|
