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channel.go
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channel.go
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package server
import (
"fmt"
"sync"
"github.com/WuKongIM/WuKongIM/pkg/wklog"
"github.com/WuKongIM/WuKongIM/pkg/wkproto"
"github.com/WuKongIM/WuKongIM/pkg/wkstore"
"github.com/WuKongIM/WuKongIM/pkg/wkutil"
"github.com/pkg/errors"
"go.uber.org/zap"
)
type Channel struct {
*wkstore.ChannelInfo
blacklist sync.Map // 黑名单
whitelist sync.Map // 白名单
subscriberMap sync.Map // 订阅者
s *Server
wklog.Log
tmpSubscriberMap sync.Map // 临时订阅者
}
// NewChannel NewChannel
func NewChannel(channelInfo *wkstore.ChannelInfo, s *Server) *Channel {
return &Channel{
ChannelInfo: channelInfo,
blacklist: sync.Map{},
whitelist: sync.Map{},
subscriberMap: sync.Map{},
tmpSubscriberMap: sync.Map{},
s: s,
Log: wklog.NewWKLog(fmt.Sprintf("channel[%s-%d]", channelInfo.ChannelID, channelInfo.ChannelType)),
}
}
// LoadData load data
func (c *Channel) LoadData() error {
if err := c.s.systemUIDManager.LoadIfNeed(); err != nil { // 加载系统账号
return err
}
if err := c.initChannelInfo(); err != nil {
return err
}
if err := c.initSubscribers(); err != nil { // 初始化订阅者
return err
}
if err := c.initBlacklist(); err != nil { // 初始化黑名单
return err
}
if err := c.initWhitelist(); err != nil { // 初始化白名单
return err
}
return nil
}
func (c *Channel) initChannelInfo() error {
if !c.s.opts.Datasource.ChannelInfoOn {
return nil
}
if !c.s.opts.HasDatasource() {
return nil
}
if c.ChannelType == wkproto.ChannelTypePerson {
return nil
}
channelInfo, err := c.s.datasource.GetChannelInfo(c.ChannelID, c.ChannelType)
if err != nil {
c.Error("从数据获取频道信息失败!", zap.Error(err))
return err
}
if channelInfo != nil {
c.ChannelInfo = channelInfo
return nil
}
return nil
}
// 初始化订阅者
func (c *Channel) initSubscribers() error {
channelID := c.ChannelID
channelType := c.ChannelType
if c.s.opts.HasDatasource() && channelType != wkproto.ChannelTypePerson {
subscribers, err := c.s.datasource.GetSubscribers(channelID, channelType)
if err != nil {
c.Error("从数据源获取频道订阅者失败!", zap.Error(err))
return err
}
if len(subscribers) > 0 {
for _, subscriber := range subscribers {
c.AddSubscriber(subscriber)
}
}
} else {
// ---------- 订阅者 ----------
subscribers, err := c.s.store.GetSubscribers(channelID, channelType)
if err != nil {
c.Error("获取频道订阅者失败!", zap.Error(err))
return err
}
if len(subscribers) > 0 {
for _, subscriber := range subscribers {
c.AddSubscriber(subscriber)
}
}
}
if channelType == wkproto.ChannelTypeCustomerService {
visitorID, _ := c.s.opts.GetCustomerServiceVisitorUID(channelID)
if visitorID != "" {
c.AddSubscriber(visitorID)
}
}
return nil
}
// 初始化黑名单
func (c *Channel) initBlacklist() error {
var blacklists []string
var err error
if c.s.opts.HasDatasource() {
blacklists, err = c.s.datasource.GetBlacklist(c.ChannelID, c.ChannelType)
if err != nil {
c.Error("从数据源获取黑名单失败!", zap.Error(err))
return err
}
} else {
blacklists, err = c.s.store.GetDenylist(c.ChannelID, c.ChannelType)
if err != nil {
c.Error("获取黑名单失败!", zap.Error(err))
return err
}
}
if len(blacklists) > 0 {
for _, uid := range blacklists {
c.blacklist.Store(uid, true)
}
}
return nil
}
// 初始化黑名单
func (c *Channel) initWhitelist() error {
var whitelists []string
var err error
if c.s.opts.HasDatasource() {
whitelists, err = c.s.datasource.GetWhitelist(c.ChannelID, c.ChannelType)
if err != nil {
c.Error("从数据源获取白名单失败!", zap.Error(err))
return err
}
} else {
whitelists, err = c.s.store.GetAllowlist(c.ChannelID, c.ChannelType)
if err != nil {
c.Error("获取白名单失败!", zap.Error(err))
return err
}
}
if len(whitelists) > 0 {
for _, uid := range whitelists {
c.whitelist.Store(uid, true)
}
}
return nil
}
// 获取父频道
func (c *Channel) parentChannel() (*Channel, error) {
var parentChannel *Channel
if c.ChannelType == wkproto.ChannelTypeCommunityTopic {
parentChannelID := GetCommunityTopicParentChannelID(c.ChannelID)
if parentChannelID != "" {
var err error
parentChannel, err = c.s.channelManager.GetChannel(parentChannelID, wkproto.ChannelTypeCommunity)
if err != nil {
return nil, err
}
c.Debug("获取父类频道", zap.Any("parentChannel", parentChannel))
} else {
c.Warn("不符合的社区话题频道ID", zap.String("channelID", c.ChannelID))
}
}
return parentChannel, nil
}
// ---------- 订阅者 ----------
// IsSubscriber 是否已订阅
func (c *Channel) IsSubscriber(uid string) bool {
parent, err := c.parentChannel()
if err != nil {
c.Error("获取父类频道失败!", zap.Error(err))
}
if parent != nil {
ok := parent.IsSubscriber(uid)
if ok {
return ok
}
}
_, ok := c.subscriberMap.Load(uid)
if ok {
return ok
}
return false
}
// IsTmpSubscriber 是否是临时订阅者
func (c *Channel) IsTmpSubscriber(uid string) bool {
_, ok := c.tmpSubscriberMap.Load(uid)
return ok
}
// ---------- 黑名单 (怕怕😱) ----------
// IsDenylist 是否在黑名单内
func (c *Channel) IsDenylist(uid string) bool {
_, ok := c.blacklist.Load(uid)
return ok
}
// AddSubscriber Add subscribers
func (c *Channel) AddSubscriber(uid string) {
c.subscriberMap.Store(uid, true)
}
func (c *Channel) AddSubscribers(uids []string) {
if len(uids) > 0 {
for _, uid := range uids {
c.subscriberMap.Store(uid, true)
}
}
}
func (c *Channel) AddTmpSubscriber(uid string) {
c.tmpSubscriberMap.Store(uid, true)
}
func (c *Channel) AddTmpSubscribers(uids []string) {
if len(uids) > 0 {
for _, uid := range uids {
c.tmpSubscriberMap.Store(uid, true)
}
}
}
// Allow Whether to allow sending of messages If it is in the white list or not in the black list, it is allowed to send
func (c *Channel) Allow(uid string) (bool, wkproto.ReasonCode) {
if c.ChannelType == wkproto.ChannelTypeInfo { // 资讯频道都可以发消息
return true, wkproto.ReasonSuccess
}
systemUID := c.s.systemUIDManager.SystemUID(uid) // 系统账号允许发消息
if systemUID {
return true, wkproto.ReasonSuccess
}
if c.Ban { // 频道被封
return false, wkproto.ReasonBan
}
if c.ChannelType == wkproto.ChannelTypePerson && c.s.opts.IsFakeChannel(c.ChannelID) {
if c.IsDenylist(uid) {
return false, wkproto.ReasonInBlacklist
}
return true, wkproto.ReasonSuccess
}
if c.ChannelType != wkproto.ChannelTypePerson || c.s.opts.WhitelistOffOfPerson == 0 {
whitelistLength := 0
c.whitelist.Range(func(_, _ interface{}) bool {
whitelistLength++
return false
})
if whitelistLength > 0 { // 如果白名单有内容,则只判断白名单
_, ok := c.whitelist.Load(uid)
if ok {
return ok, wkproto.ReasonSuccess
}
return ok, wkproto.ReasonNotInWhitelist
}
if c.ChannelType == wkproto.ChannelTypePerson { // 个人频道强制验证白名单,除非WhitelistOffOfPerson==1
if whitelistLength == 0 {
return false, wkproto.ReasonNotInWhitelist
}
}
}
if c.IsDenylist(uid) {
return false, wkproto.ReasonInBlacklist
}
return true, wkproto.ReasonSuccess
}
// real subscribers
func (c *Channel) RealSubscribers(customSubscribers []string) ([]string, error) {
subscribers := make([]string, 0) // TODO: 此处可以用对象pool来管理
if c.ChannelType == wkproto.ChannelTypeCommunityTopic { // 社区话题频道
channelSubscribers := c.GetAllSubscribers()
if len(channelSubscribers) == 0 { // 如果频道无订阅者,则获取父频道的订阅者
parentChannel, err := c.parentChannel()
if err != nil {
c.Error("获取父类频道失败!", zap.Error(err))
return nil, err
}
if parentChannel == nil {
return nil, errors.New("父类频道不存在!")
}
return parentChannel.RealSubscribers(customSubscribers)
}
} else if c.ChannelType == wkproto.ChannelTypeInfo {
subscribers = append(subscribers, c.GetAllTmpSubscribers()...)
}
// 组合订阅者
if len(customSubscribers) > 0 { // 如果指定了订阅者则消息只发给指定的订阅者,不将发送给其他订阅者
subscribers = append(subscribers, customSubscribers...)
} else { // 默认将消息发送给频道的订阅者
subscribers = append(subscribers, c.GetAllSubscribers()...)
}
return wkutil.RemoveRepeatedElement(subscribers), nil
}
// GetAllSubscribers 获取所有订阅者
func (c *Channel) GetAllSubscribers() []string {
subscribers := make([]string, 0)
c.subscriberMap.Range(func(key, value interface{}) bool {
subscribers = append(subscribers, key.(string))
return true
})
return subscribers
}
func (c *Channel) GetAllTmpSubscribers() []string {
subscribers := make([]string, 0)
c.tmpSubscriberMap.Range(func(key, value interface{}) bool {
subscribers = append(subscribers, key.(string))
return true
})
return subscribers
}
// RemoveAllSubscriber 移除所有订阅者
func (c *Channel) RemoveAllSubscriber() {
c.subscriberMap.Range(func(key, value interface{}) bool {
c.subscriberMap.Delete(key)
return true
})
}
// RemoveAllTmpSubscriber 移除所有临时订阅者
func (c *Channel) RemoveAllTmpSubscriber() {
c.tmpSubscriberMap.Range(func(key, value interface{}) bool {
c.tmpSubscriberMap.Delete(key)
return true
})
}
// RemoveSubscriber 移除订阅者
func (c *Channel) RemoveSubscriber(uid string) {
c.subscriberMap.Delete(uid)
}
func (c *Channel) RemoveSubscribers(uids []string) {
if len(uids) > 0 {
for _, uid := range uids {
c.subscriberMap.Delete(uid)
}
}
}
func (c *Channel) RemoveTmSubscriber(uid string) {
c.tmpSubscriberMap.Delete(uid)
}
func (c *Channel) RemoveTmpSubscribers(uids []string) {
if len(uids) > 0 {
for _, uid := range uids {
c.tmpSubscriberMap.Delete(uid)
}
}
}
// AddDenylist 添加黑名单
func (c *Channel) AddDenylist(uids []string) {
if len(uids) == 0 {
return
}
for _, uid := range uids {
c.blacklist.Store(uid, true)
}
}
// SetDenylist SetDenylist
func (c *Channel) SetDenylist(uids []string) {
c.blacklist.Range(func(key interface{}, value interface{}) bool {
c.blacklist.Delete(key)
return true
})
c.AddDenylist(uids)
}
// RemoveDenylist 移除黑名单
func (c *Channel) RemoveDenylist(uids []string) {
if len(uids) == 0 {
return
}
for _, uid := range uids {
c.blacklist.Delete(uid)
}
}
// ---------- 白名单 ----------
// AddAllowlist 添加白名单
func (c *Channel) AddAllowlist(uids []string) {
if len(uids) == 0 {
return
}
for _, uid := range uids {
c.whitelist.Store(uid, true)
}
}
// SetAllowlist SetAllowlist
func (c *Channel) SetAllowlist(uids []string) {
c.whitelist.Range(func(key interface{}, value interface{}) bool {
c.whitelist.Delete(key)
return true
})
c.AddAllowlist(uids)
}
// RemoveAllowlist 移除白名单
func (c *Channel) RemoveAllowlist(uids []string) {
if len(uids) == 0 {
return
}
for _, uid := range uids {
c.whitelist.Delete(uid)
}
}
func (c *Channel) Put(messages []*Message, fromUID string, fromDeviceFlag wkproto.DeviceFlag, fromDeviceID string) error {
//########## get subscribers ##########
subscribers, err := c.RealSubscribers(nil) // get subscribers
if err != nil {
c.Error("获取频道失败!", zap.Error(err))
return err
}
//########## store messages in user queue ##########
var messageSeqMap map[int64]uint32
if len(messages) > 0 {
messageSeqMap, err = c.storeMessageToUserQueueIfNeed(messages, subscribers)
if err != nil {
return err
}
}
// ########## update conversation ##########
if !c.Large && c.ChannelType != wkproto.ChannelTypeInfo { // 如果是大群 则不维护最近会话 几万人的大群,更新最近会话也太耗性能
var lastMsg *Message
for i := len(messages) - 1; i >= 0; i-- {
m := messages[i]
if !m.NoPersist && !m.SyncOnce {
lastMsg = messages[i]
break
}
}
if lastMsg != nil {
c.updateConversations(lastMsg, subscribers)
}
}
//########## delivery messages ##########
c.s.deliveryManager.startDeliveryMessages(messages, c.Large, messageSeqMap, subscribers, fromUID, fromDeviceFlag, fromDeviceID)
return nil
}
// store message to user queue if need
func (c *Channel) storeMessageToUserQueueIfNeed(messages []*Message, subscribers []string) (map[int64]uint32, error) {
if len(messages) == 0 {
return nil, nil
}
messageSeqMap := make(map[int64]uint32, len(messages))
for _, subscriber := range subscribers {
storeMessages := make([]wkstore.Message, 0, len(messages))
for _, m := range messages {
cloneMsg, err := m.DeepCopy()
if err != nil {
return nil, err
}
cloneMsg.ToUID = subscriber
cloneMsg.large = c.Large
if m.ChannelType == wkproto.ChannelTypePerson && m.ChannelID == subscriber {
cloneMsg.ChannelID = m.FromUID
}
storeMessages = append(storeMessages, cloneMsg)
}
if len(storeMessages) > 0 {
_, err := c.s.store.AppendMessages(subscriber, wkproto.ChannelTypePerson, storeMessages) // will fill messageSeq after store messages
if err != nil {
return nil, err
}
for _, storeMessage := range storeMessages {
messageSeqMap[storeMessage.GetMessageID()] = storeMessage.GetSeq()
}
}
}
return messageSeqMap, nil
}
func (c *Channel) updateConversations(m *Message, subscribers []string) {
c.s.conversationManager.PushMessage(m, subscribers)
}