snengame/internal/coordinator/match.go

package coordinator

import (
	"log"
	"time"

	"git.saintnet.tech/stryan/snengame/internal/game"
	"github.com/google/uuid"
)

type MMRPlayer struct {
	Id        uuid.UUID
	MMR       int
	QueueTime time.Time
}

func MatchMaker(c *Coordinator) {
	//in the future the int  will be MMR or something, but for now it's just a set
	for {
		select {
		case p := <-c.PlayerQueueChan:
			//add player to pool
			c.PlayerPool[MMRPlayer{
				Id:        p,
				MMR:       0,
				QueueTime: time.Now()}] = true
			log.Printf("Player %v has queued", p)
		default:
			//no new players, let's try to matchmake
			if len(c.PlayerPool) < 2 {
				continue
			} else {
				//fancy matchmaking math to guarantee a fair game
				var p1, p2 MMRPlayer
				for key, _ := range c.PlayerPool {
					p1 = key
					break
				}
				delete(c.PlayerPool, p1)
				for key, _ := range c.PlayerPool {
					p2 = key
					break
				}
				delete(c.PlayerPool, p2)
				m := NewSession()
				log.Printf("Creating match %v for %v and %v", m.ID, p1, p2)
				m.Active = false
				c.MatchLock.Lock()
				c.Matches[m.ID] = m
				c.MatchLock.Unlock()
				c.CallbackChan[p1.Id] <- m.ID
				c.CallbackChan[p2.Id] <- m.ID
				go MatchWatcher(m)
			}

		}
	}
}

func QueueCleaner(c *Coordinator) {
	for {
		time.Sleep(5 * time.Minute)
		for v, _ := range c.PlayerPool {
			if time.Now().After(v.QueueTime.Add(time.Minute * 5)) {
				log.Printf("Removing player %v from pool", v.Id)
				delete(c.PlayerPool, v) //probably should just flag
			}
		}
	}
}

func MatchCleaner(c *Coordinator) {
	for {
		time.Sleep(10 * time.Second)
		c.MatchLock.Lock()
		for _, v := range c.Matches {
			if v.Game == nil && v.Active {
				log.Println("clearing match with no game")
				delete(c.Matches, v.ID)
				v.Watcher <- true
			}
			if time.Now().After(v.LastMove.Add(time.Minute * 10)) {
				log.Println("clearing stale match")
				v.Game = nil
				v.Active = false
				delete(c.Matches, v.ID)
				v.Watcher <- true
			}
		}
		c.MatchLock.Unlock()
	}
}

func MatchWatcher(m *Session) {
	ticker := time.NewTicker(1 * time.Second)
	old_turn := -1
	var old_board *game.Board
	old_sen_hand := -1
	old_sco_hand := -1
	old_sen_life := -1
	old_sco_life := -1
	sen_ready := false
	sco_ready := false
	for {
		select {
		case <-ticker.C:
			if m.Active && m.Game != nil && len(m.Broadcasts) > 0 {
				if m.Game.Status == game.StatusLobby && !sen_ready && m.Game.SentinalPlayer.Ready {
					for _, v := range m.Broadcasts {
						addBroadcast(v, SessionRespBroadcastSenReady)
					}
					sen_ready = true
				}
				if m.Game.Status == game.StatusLobby && !sco_ready && m.Game.ScourgePlayer.Ready {
					for _, v := range m.Broadcasts {
						addBroadcast(v, SessionRespBroadcastScoReady)
					}
					sco_ready = true
				}
				if m.Game.Status == game.StatusSentinalWin {
					for _, v := range m.Broadcasts {
						addBroadcast(v, SessionRespBroadcastSenWin)
					}
				}
				if m.Game.Status == game.StatusScourgeWin {
					for _, v := range m.Broadcasts {
						addBroadcast(v, SessionRespBroadcastScoWin)
					}
				}
				if m.p1 == uuid.Nil && sen_ready {
					for _, v := range m.Broadcasts {
						addBroadcast(v, SessionRespBroadcastSenLeft)
					}
					sen_ready = false
				}
				if m.p2 == uuid.Nil && sco_ready {
					for _, v := range m.Broadcasts {
						addBroadcast(v, SessionRespBroadcastScoLeft)
					}
					sco_ready = false
				}
				if old_board == nil || old_board.Sentinal != m.Game.GameBoard.Sentinal || old_board.Scourge != m.Game.GameBoard.Scourge || old_sen_hand != len(m.Game.SentinalPlayer.Hand) || old_sco_hand != len(m.Game.ScourgePlayer.Hand) || old_sen_life != m.Game.SentinalPlayer.Life || old_sco_life != m.Game.ScourgePlayer.Life {
					if old_board == nil {
						old_board = m.Game.GameBoard
					} else {
						old_board.Sentinal = m.Game.GameBoard.Sentinal
						old_board.Scourge = m.Game.GameBoard.Scourge
					}
					old_sen_hand = len(m.Game.SentinalPlayer.Hand)
					old_sco_hand = len(m.Game.ScourgePlayer.Hand)
					old_sen_life = m.Game.SentinalPlayer.Life
					old_sco_life = m.Game.ScourgePlayer.Life
					for _, v := range m.Broadcasts {
						addBroadcast(v, SessionRespBroadcastUpdate)
					}
				}
				if old_turn != m.Game.CurrentTurn {
					old_turn = m.Game.CurrentTurn
					if old_turn == game.SentinalID {
						for k, v := range m.pMap {
							if v == game.SentinalID {
								addBroadcast(m.Broadcasts[k], SessionRespBroadcastSenTurn)
							}
						}
					} else if old_turn == game.ScourgeID {
						for k, v := range m.pMap {
							if v == game.ScourgeID {
								addBroadcast(m.Broadcasts[k], SessionRespBroadcastScoTrun)
							}
						}
					}
				}
			}

		case <-m.Watcher:
			close(m.Watcher)
			return
		}
	}
}

func addBroadcast(pipe chan SessionResp, brd SessionResp) {
	select {
	case pipe <- brd:
	default:
		log.Println("broadcasts buffer full, discarding")
	}
}