/
discordevents.go
424 lines (350 loc) · 12.8 KB
/
discordevents.go
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package bot
import (
"fmt"
"runtime/debug"
"strconv"
"strings"
"sync/atomic"
"time"
"emperror.dev/errors"
"github.com/botlabs-gg/yagpdb/v2/bot/eventsystem"
"github.com/botlabs-gg/yagpdb/v2/bot/joinedguildsupdater"
"github.com/botlabs-gg/yagpdb/v2/bot/models"
"github.com/botlabs-gg/yagpdb/v2/common"
"github.com/botlabs-gg/yagpdb/v2/common/featureflags"
"github.com/botlabs-gg/yagpdb/v2/common/pubsub"
"github.com/botlabs-gg/yagpdb/v2/lib/discordgo"
"github.com/mediocregopher/radix/v3"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/sirupsen/logrus"
"github.com/volatiletech/sqlboiler/v4/boil"
)
func addBotHandlers() {
eventsystem.AddHandlerFirstLegacy(BotPlugin, HandleReady, eventsystem.EventReady)
eventsystem.AddHandlerFirstLegacy(BotPlugin, HandleMessageCreateUpdateFirst, eventsystem.EventMessageCreate, eventsystem.EventMessageUpdate)
eventsystem.AddHandlerSecondLegacy(BotPlugin, StateHandler, eventsystem.EventAll)
eventsystem.AddHandlerAsyncLastLegacy(BotPlugin, EventLogger.handleEvent, eventsystem.EventAll)
eventsystem.AddHandlerAsyncLast(BotPlugin, HandleGuildCreate, eventsystem.EventGuildCreate)
eventsystem.AddHandlerAsyncLast(BotPlugin, HandleGuildDelete, eventsystem.EventGuildDelete)
eventsystem.AddHandlerAsyncLast(BotPlugin, HandleGuildUpdate, eventsystem.EventGuildUpdate)
eventsystem.AddHandlerAsyncLast(BotPlugin, handleInvalidateCacheEvent,
eventsystem.EventGuildRoleCreate,
eventsystem.EventGuildRoleUpdate,
eventsystem.EventGuildRoleDelete,
eventsystem.EventChannelCreate,
eventsystem.EventChannelUpdate,
eventsystem.EventChannelDelete,
eventsystem.EventGuildMemberUpdate)
eventsystem.AddHandlerAsyncLast(BotPlugin, HandleGuildMemberAdd, eventsystem.EventGuildMemberAdd)
eventsystem.AddHandlerAsyncLast(BotPlugin, HandleGuildMemberRemove, eventsystem.EventGuildMemberRemove)
eventsystem.AddHandlerAsyncLastLegacy(BotPlugin, HandleGuildMembersChunk, eventsystem.EventGuildMembersChunk)
eventsystem.AddHandlerAsyncLastLegacy(BotPlugin, HandleReactionAdd, eventsystem.EventMessageReactionAdd)
eventsystem.AddHandlerAsyncLastLegacy(BotPlugin, HandleMessageCreate, eventsystem.EventMessageCreate)
eventsystem.AddHandlerAsyncLastLegacy(BotPlugin, HandleRatelimit, eventsystem.EventRateLimit)
eventsystem.AddHandlerAsyncLastLegacy(BotPlugin, ReadyTracker.handleReadyOrResume, eventsystem.EventReady, eventsystem.EventResumed)
eventsystem.AddHandlerAsyncLastLegacy(BotPlugin, handleResumed, eventsystem.EventResumed)
eventsystem.AddHandlerAsyncLastLegacy(BotPlugin, HandleInteractionCreate, eventsystem.EventInteractionCreate)
}
var (
connectedGuildsCache = common.CacheSet.RegisterSlot("bot_connected_guilds", func(_ interface{}) (interface{}, error) {
var listedServers []int64
err := common.RedisPool.Do(radix.Cmd(&listedServers, "SMEMBERS", "connected_guilds"))
return listedServers, err
}, 0)
)
func HandleReady(data *eventsystem.EventData) {
evt := data.Ready()
commonEventsTotal.With(prometheus.Labels{"type": "Ready"}).Inc()
RefreshStatus(ContextSession(data.Context()))
// We pass the common.Session to the command system and that needs the user from the state
common.BotSession.State.Lock()
ready := discordgo.Ready{
Version: evt.Version,
SessionID: evt.SessionID,
User: evt.User,
}
common.BotSession.State.Ready = ready
common.BotSession.State.Unlock()
var listedServers []int64
if listedServersI, err := connectedGuildsCache.Get(0); err == nil {
listedServers = listedServersI.([]int64)
} else {
logger.WithError(err).Error("Failed retrieving connected servers")
}
numShards := ShardManager.GetNumShards()
OUTER:
for _, v := range listedServers {
shard := (v >> 22) % int64(numShards)
if int(shard) != data.Session.ShardID {
continue
}
for _, readyGuild := range evt.Guilds {
if readyGuild.ID == v {
continue OUTER
}
}
logger.Info("Left server while bot was down: ", v)
go guildRemoved(v)
}
guilds := make([]int64, len(evt.Guilds))
for i, v := range evt.Guilds {
guilds[i] = v.ID
}
featureflags.BatchInitCache(guilds)
}
var guildJoinHandler = joinedguildsupdater.NewUpdater()
var metricsJoinedGuilds = promauto.NewCounter(prometheus.CounterOpts{
Name: "yagpdb_joined_guilds",
Help: "Guilds yagpdb newly joined",
})
var commonEventsTotal = promauto.NewCounterVec(prometheus.CounterOpts{
Name: "bot_events_total",
Help: "Common bot events",
}, []string{"type"})
func HandleGuildCreate(evt *eventsystem.EventData) (retry bool, err error) {
g := evt.GuildCreate()
logger.WithFields(logrus.Fields{
"g_name": g.Name,
"guild": g.ID,
}).Debug("Joined guild")
saddRes := 0
isBanned := false
err = common.RedisPool.Do(radix.Pipeline(
radix.Cmd(&saddRes, "SADD", "connected_guilds", discordgo.StrID(g.ID)),
radix.Cmd(&isBanned, "SISMEMBER", "banned_servers", discordgo.StrID(g.ID)),
))
if err != nil {
return true, errors.WithStackIf(err)
}
// check if this server is new
if saddRes > 0 {
logger.WithField("g_name", g.Name).WithField("guild", g.ID).Info("Joined new guild!")
go eventsystem.EmitEvent(eventsystem.NewEventData(nil, eventsystem.EventNewGuild, g), eventsystem.EventNewGuild)
metricsJoinedGuilds.Inc()
commonEventsTotal.With(prometheus.Labels{"type": "Guild Create"}).Inc()
}
// check if the server is banned from using the bot
if isBanned {
logger.WithField("guild", g.ID).Info("Banned server tried to add bot back")
common.BotSession.ChannelMessageSend(g.ID, "This server is banned from using this bot. Join the support server for more info.")
err = common.BotSession.GuildLeave(g.ID)
if err != nil {
return CheckDiscordErrRetry(err), errors.WithStackIf(err)
}
}
guildJoinHandler.Incoming <- evt
return false, nil
}
func HandleGuildDelete(evt *eventsystem.EventData) (retry bool, err error) {
if evt.GuildDelete().Unavailable {
// Just a guild outage
return
}
logger.WithFields(logrus.Fields{
"guild": evt.GuildDelete().ID,
}).Info("Left guild")
go guildRemoved(evt.GuildDelete().ID)
return false, nil
}
func HandleGuildMemberAdd(evt *eventsystem.EventData) (retry bool, err error) {
// ma := evt.GuildMemberAdd()
// failedUsersCache.Delete(discordgo.StrID(ma.GuildID) + ":" + discordgo.StrID(ma.User.ID))
guildJoinHandler.Incoming <- evt
return false, nil
}
func HandleGuildMemberRemove(evt *eventsystem.EventData) (retry bool, err error) {
guildJoinHandler.Incoming <- evt
return false, nil
}
// StateHandler updates the world state
// use AddHandlerBefore to add handler before this one, otherwise they will alwyas be after
func StateHandler(evt *eventsystem.EventData) {
stateTracker.HandleEvent(evt.Session, evt.EvtInterface)
// State.HandleEvent(ContextSession(evt.Context()), evt.EvtInterface)
}
func HandleGuildUpdate(evt *eventsystem.EventData) (retry bool, err error) {
InvalidateCache(evt.GuildUpdate().Guild.ID, 0)
g := evt.GuildUpdate().Guild
gm := &models.JoinedGuild{
ID: g.ID,
MemberCount: int64(g.MemberCount),
OwnerID: g.OwnerID,
JoinedAt: time.Now(),
Name: g.Name,
Avatar: g.Icon,
}
err = gm.Upsert(evt.Context(), common.PQ, true, []string{"id"}, boil.Whitelist("name", "avatar", "owner_id"), boil.Infer())
if err != nil {
return true, errors.WithStackIf(err)
}
return false, nil
}
func handleInvalidateCacheEvent(evt *eventsystem.EventData) (bool, error) {
if evt.GS == nil {
return false, nil
}
userID := int64(0)
if evt.Type == eventsystem.EventGuildMemberUpdate {
userID = evt.GuildMemberUpdate().User.ID
}
InvalidateCache(evt.GS.ID, userID)
return false, nil
}
func InvalidateCache(guildID, userID int64) {
if userID != 0 {
if err := common.RedisPool.Do(radix.Cmd(nil, "DEL", common.CacheKeyPrefix+discordgo.StrID(userID)+":guilds")); err != nil {
logger.WithField("guild", guildID).WithField("user", userID).WithError(err).Error("failed invalidating user guilds cache")
}
}
if guildID != 0 {
if err := common.RedisPool.Do(radix.Cmd(nil, "DEL", common.CacheKeyPrefix+common.KeyGuild(guildID))); err != nil {
logger.WithField("guild", guildID).WithField("user", userID).WithError(err).Error("failed invalidating guild cache")
}
if err := common.RedisPool.Do(radix.Cmd(nil, "DEL", common.CacheKeyPrefix+common.KeyGuildChannels(guildID))); err != nil {
logger.WithField("guild", guildID).WithField("user", userID).WithError(err).Error("failed invalidating guild channels cache")
}
}
}
func ConcurrentEventHandler(inner eventsystem.HandlerFuncLegacy) eventsystem.HandlerFuncLegacy {
return eventsystem.HandlerFuncLegacy(func(evt *eventsystem.EventData) {
go func() {
defer func() {
if err := recover(); err != nil {
stack := string(debug.Stack())
logger.WithField(logrus.ErrorKey, err).WithField("evt", evt.Type.String()).Error("Recovered from panic in (concurrent) event handler\n" + stack)
}
}()
inner(evt)
}()
})
}
func LimitedConcurrentEventHandler(inner eventsystem.HandlerFuncLegacy, limit int64, sleepDur time.Duration) eventsystem.HandlerFuncLegacy {
counter := new(int64)
return eventsystem.HandlerFuncLegacy(func(evt *eventsystem.EventData) {
go func() {
defer func() {
atomic.AddInt64(counter, -1)
if err := recover(); err != nil {
stack := string(debug.Stack())
logger.WithField(logrus.ErrorKey, err).WithField("evt", evt.Type.String()).Error("Recovered from panic in (concurrent) event handler\n" + stack)
}
}()
for {
// spin lock
if atomic.AddInt64(counter, 1) <= limit {
break
} else {
atomic.AddInt64(counter, -1)
time.Sleep(sleepDur)
}
}
inner(evt)
}()
})
}
func HandleReactionAdd(evt *eventsystem.EventData) {
ra := evt.MessageReactionAdd()
if ra.GuildID != 0 {
return
}
if ra.UserID == common.BotUser.ID {
return
}
err := pubsub.Publish("dm_reaction", -1, ra)
if err != nil {
logger.WithError(err).Error("failed publishing dm reaction")
}
}
func handleDmGuildInfoInteraction(evt *eventsystem.EventData) {
ic := evt.InteractionCreate()
customID := ic.MessageComponentData().CustomID
guild_id, err := strconv.ParseInt(strings.Replace(customID, "DM_", "", 1), 10, 64)
if err != nil {
logger.Errorf("DM interaction received with incorrect customID: %s from user %d", customID, ic.User.ID)
}
gs, err := evt.Session.Guild(guild_id)
logger.WithError(err).Errorf("Failed getting guild info for DM %s from user %d", customID, ic.User.ID)
response := discordgo.InteractionResponse{
Type: discordgo.InteractionResponseChannelMessageWithSource,
Data: &discordgo.InteractionResponseData{Flags: 64},
}
content := ""
if gs == nil {
content = fmt.Sprintf("This DM was sent from server\nID: **%d**, \nI couldn't fetch more information about it.", guild_id)
} else {
content = fmt.Sprintf("This DM was sent from server\nID: **%d**, \nName: **%s**", guild_id, gs.Name)
}
response.Data.Content = content
err = evt.Session.CreateInteractionResponse(ic.ID, ic.Token, &response)
logger.WithError(err).Printf("Interaction Response!")
}
func HandleInteractionCreate(evt *eventsystem.EventData) {
ic := evt.InteractionCreate()
if ic.GuildID != 0 {
return
}
if ic.User == nil {
return
}
if ic.User.ID == common.BotUser.ID {
return
}
//handle dm message guild info interaction
if ic.Type == discordgo.InteractionMessageComponent && strings.HasPrefix(ic.MessageComponentData().CustomID, "DM_") {
handleDmGuildInfoInteraction(evt)
} else {
err := pubsub.Publish("dm_interaction", -1, ic)
if err != nil {
logger.WithError(err).Error("failed publishing dm interaction")
}
}
}
func HandleMessageCreate(evt *eventsystem.EventData) {
commonEventsTotal.With(prometheus.Labels{"type": "Message Create"}).Inc()
mc := evt.MessageCreate()
if mc.GuildID != 0 {
return
}
if mc.Author == nil || mc.Author.ID == common.BotUser.ID {
return
}
err := pubsub.Publish("dm_message", -1, mc)
if err != nil {
logger.WithError(err).Error("failed publishing dm message")
}
}
// HandleMessageCreateUpdateFirst transforms the message events a little to make them easier to deal with
// Message.Member.User is null from the api, so we assign it to Message.Author
func HandleMessageCreateUpdateFirst(evt *eventsystem.EventData) {
if evt.GS == nil {
return
}
if evt.Type == eventsystem.EventMessageCreate {
msg := evt.MessageCreate()
if !IsNormalUserMessage(msg.Message) {
return
}
if msg.Member != nil {
msg.Member.User = msg.Author
msg.Member.GuildID = msg.GuildID
}
} else {
edit := evt.MessageUpdate()
if !IsNormalUserMessage(edit.Message) {
return
}
edit.Member.User = edit.Author
edit.Member.GuildID = edit.GuildID
}
}
func HandleRatelimit(evt *eventsystem.EventData) {
rl := evt.RateLimit()
if !rl.TooManyRequests.Global {
return
}
pubsub.PublishRatelimit(rl)
}
func handleResumed(evt *eventsystem.EventData) {
commonEventsTotal.With(prometheus.Labels{"type": "Resumed"}).Inc()
}