snengame/internal/coordinator/coordinator.go

package coordinator

import (
	"fmt"
	"log"
	"time"

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

type Coordinator struct {
	Matches         map[uuid.UUID]*Session
	PlayerQueueChan chan uuid.UUID
	CallbackChan    map[uuid.UUID]chan uuid.UUID
}

func NewCoordinator() *Coordinator {
	return &Coordinator{
		Matches:         make(map[uuid.UUID]*Session),
		PlayerQueueChan: make(chan uuid.UUID),
		CallbackChan:    make(map[uuid.UUID]chan uuid.UUID),
	}
}

func (c *Coordinator) Start() {
	go func() {
		m := NewSession()
		var p1, p2 uuid.UUID
		p1 = <-c.PlayerQueueChan
		fmt.Println("p1 join")
		p2 = <-c.PlayerQueueChan
		fmt.Println("p2 join")
		m.Active = true
		m.Game = game.NewGame()
		c.Matches[m.ID] = m
		c.CallbackChan[p1] <- m.ID
		c.CallbackChan[p2] <- m.ID
	}()
	go func() {
		for {
			time.Sleep(10)
			for _, v := range c.Matches {
				if v.Game == nil && v.Active {
					log.Println("clearing match with no game")
					delete(c.Matches, v.ID)
				}
			}
		}
	}()

}

func (c *Coordinator) Coordinate(cmd *SessionCommand) *SessionCommandResult {
	switch cmd.Command {
	case SessionCmdQuery:
		c.CallbackChan[cmd.ID] = make(chan uuid.UUID)
		c.PlayerQueueChan <- cmd.ID
		m := <-c.CallbackChan[cmd.ID]
		return &SessionCommandResult{
			ID:      cmd.ID,
			MatchID: m,
			Result:  SessionRespFound,
		}
	case SessionCmdJoin:
		m, exists := c.Matches[cmd.MatchID]
		if !exists {
			return &SessionCommandResult{
				ID:      cmd.ID,
				MatchID: uuid.Nil,
				Result:  SessionRespJoinError,
			}
		}
		resp := m.Join(cmd.ID)
		return &SessionCommandResult{
			ID:      cmd.ID,
			MatchID: m.ID,
			Result:  resp,
		}
	case SessionCmdLeave:
		m, exists := c.Matches[cmd.MatchID]
		if !exists || !m.PlayerIn(cmd.ID) {
			return &SessionCommandResult{
				ID:      cmd.ID,
				MatchID: uuid.Nil,
				Result:  SessionRespLeft,
			}
		}
		m.Leave(cmd.ID)
		return &SessionCommandResult{
			ID:      cmd.ID,
			MatchID: uuid.Nil,
			Result:  SessionRespLeft,
		}
	case SessionCmdPlay:
		m, exists := c.Matches[cmd.MatchID]
		if !exists || !m.PlayerIn(cmd.ID) {
			return &SessionCommandResult{
				ID:      cmd.ID,
				MatchID: uuid.Nil,
				Result:  SessionRespLeft,
			}
		}
		resp := m.Play(cmd.ID, cmd.GameCommand)
		return &SessionCommandResult{
			ID:         cmd.ID,
			MatchID:    m.ID,
			Result:     SessionRespPlayed,
			GameResult: resp,
		}
	}
	return &SessionCommandResult{
		ID:      cmd.ID,
		MatchID: uuid.Nil,
		Result:  SessionRespError,
	}
}