connect/server/hub.go

package server

import (
	"context"
	"encoding/json"
	"fmt"
	"sync"

	"github.com/redis/go-redis/v9"
	"sikey.com/websocket/utils/zlog"
)

type HubConfig struct {
	ConnectSize    int
	DisconnectSize int
	MessageSize    int
	ServerId       string // serverId 服务器ID
}

type Hub struct {
	serverId string // serverId 服务器ID
	rdb      redis.UniversalClient

	clients    map[string]*Client
	mutex      sync.RWMutex
	Connect    chan *Client
	Disconnect chan *Client
	Message    chan *Message
}

func NewHub(cfg HubConfig) *Hub {
	hub := &Hub{
		serverId: cfg.ServerId,
		rdb: redis.NewUniversalClient(&redis.UniversalOptions{
			Addrs:    []string{"106.75.230.4:6379"},
			Password: "sikey!Q@W#E456",
			DB:       0,
		}),

		clients: make(map[string]*Client),
		mutex:   sync.RWMutex{},

		Connect:    make(chan *Client, cfg.ConnectSize),
		Disconnect: make(chan *Client, cfg.DisconnectSize),
		Message:    make(chan *Message, cfg.MessageSize),
	}

	go hub.run()

	go hub.remotelyEvent() // 远程事件
	//go hub.remotelyMessageReader()
	//go hub.remotelyMessageWriter()
	return hub
}

func (h *Hub) run() {
	for {
		select {
		case client := <-h.Connect:
			h.clients[client.UserId] = client
		case client := <-h.Disconnect:
			close(client.Send)
			delete(h.clients, client.UserId)
		case message := <-h.Message:
			if client, ok := h.clients[message.receiver]; ok {
				if client.isRemotely {
					ctx := context.Background()
					err := h.rdb.Publish(ctx, messageChannelEvent, message).Err()
					if err != nil {
						zlog.Error(err)
					}
				} else {
					client.Send <- message
				}
			}
		}
	}
}

var (
	connectChannelEvent    = "client.event.connect"
	disconnectChannelEvent = "client.event.disconnect"
	messageChannelEvent    = "client.event.message"
)

func (h *Hub) remotelyEvent() {
	ctx := context.TODO()
	pubsub := h.rdb.PSubscribe(ctx, "client.event.*")
	defer pubsub.Close()

	for {
		rMsg, err := pubsub.ReceiveMessage(ctx)
		if err != nil {
			zlog.Error(err)
		}

		switch rMsg.Channel {
		case connectChannelEvent:
			h.Connect <- &Client{
				hub:        h,
				UserId:     rMsg.Payload,
				isRemotely: true,
				Send:       make(chan *Message),
			}
		case disconnectChannelEvent:
			h.Disconnect <- h.clients[rMsg.Payload]
		case messageChannelEvent:
			var message Message
			if err = json.Unmarshal([]byte(rMsg.Payload), &message); err != nil {
				zlog.Error(err)
				break
			}
			h.Message <- &message
		}
		fmt.Println(rMsg)
	}
}