From: Rudolf Polzer Date: Mon, 7 Feb 2022 21:38:29 +0000 (+0100) Subject: Add our power levels Matrix bot. X-Git-Tag: xonotic-v0.8.5~30 X-Git-Url: https://git.xonotic.org/?p=xonotic%2Fxonotic.git;a=commitdiff_plain;h=0fa421ecb8b379560d78661f10f34e032439fefb Add our power levels Matrix bot. --- diff --git a/misc/infrastructure/powerbot/bot.go b/misc/infrastructure/powerbot/bot.go new file mode 100644 index 00000000..2917c1d6 --- /dev/null +++ b/misc/infrastructure/powerbot/bot.go @@ -0,0 +1,267 @@ +package main + +import ( + "encoding/json" + "fmt" + "io/ioutil" + "log" + "maunium.net/go/mautrix" + "maunium.net/go/mautrix/event" + "maunium.net/go/mautrix/id" + "strings" + "sync" + "time" +) + +const ( + syncInterval = time.Minute + syncForceFrequency = 24 * 60 +) + +type Config struct { + Homeserver string `json:"homeserver"` + UserID id.UserID `json:"user_id"` + Password string `json:"password,omitempty"` + DeviceID id.DeviceID `json:"device_id,omitempty"` + AccessToken string `json:"access_token,omitempty"` + Rooms [][]id.RoomID `json:"rooms"` +} + +func (c *Config) Load() error { + log.Printf("Loading config.") + data, err := ioutil.ReadFile("config.json") + if err != nil { + return err + } + return json.Unmarshal(data, c) +} + +func (c *Config) Save() error { + log.Printf("Saving config.") + data, err := json.MarshalIndent(c, "", "\t") + if err != nil { + return err + } + return ioutil.WriteFile("config.json", data, 0700) +} + +func Login(config *Config) (*mautrix.Client, error) { + // Note: we have to lower case the user ID for Matrix protocol communication. + uid := id.UserID(strings.ToLower(string(config.UserID))) + client, err := mautrix.NewClient(config.Homeserver, uid, config.AccessToken) + if err != nil { + return nil, fmt.Errorf("failed to create client: %v", err) + } + if config.AccessToken == "" { + resp, err := client.Login(&mautrix.ReqLogin{ + Type: mautrix.AuthTypePassword, + Identifier: mautrix.UserIdentifier{ + Type: mautrix.IdentifierTypeUser, + User: string(client.UserID), + }, + Password: config.Password, + InitialDeviceDisplayName: "matrixbot", + StoreCredentials: true, + }) + if err != nil { + return nil, fmt.Errorf("failed to authenticate: %v", err) + } + config.Password = "" + config.DeviceID = resp.DeviceID + config.AccessToken = resp.AccessToken + err = config.Save() + if err != nil { + return nil, fmt.Errorf("failed to save config: %v", err) + } + } else { + client.DeviceID = config.DeviceID + } + return client, nil +} + +var ( + roomUsers = map[id.RoomID]map[id.UserID]struct{}{} + roomUsersMu sync.RWMutex + fullySynced bool + roomPowerLevels = map[id.RoomID]*event.PowerLevelsEventContent{} +) + +func setUserStateAt(room id.RoomID, user id.UserID, now time.Time, maxPrevState, state State) { + err := writeUserStateAt(room, user, now, maxPrevState, state) + if err != nil { + log.Fatalf("failed to write user state: %v", err) + } +} + +func handleMessage(now time.Time, room id.RoomID, sender id.UserID, raw *event.Event) { + // log.Printf("[%v] Message from %v to %v", now, sender, room) + roomUsersMu.Lock() + roomUsers[room][sender] = struct{}{} + roomUsersMu.Unlock() + setUserStateAt(room, sender, now.Add(-activeTime), Active, Active) + setUserStateAt(room, sender, now, Active, Idle) +} + +func handleJoin(now time.Time, room id.RoomID, member id.UserID, raw *event.Event) { + log.Printf("[%v] Join from %v to %v", now, member, room) + roomUsersMu.Lock() + roomUsers[room][member] = struct{}{} + roomUsersMu.Unlock() + setUserStateAt(room, member, now, NotActive, Idle) +} + +func handleLeave(now time.Time, room id.RoomID, member id.UserID, raw *event.Event) { + log.Printf("[%v] Leave from %v to %v", now, member, room) + roomUsersMu.Lock() + delete(roomUsers[room], member) + roomUsersMu.Unlock() + setUserStateAt(room, member, now, Active, NotActive) +} + +func handlePowerLevels(now time.Time, room id.RoomID, levels *event.PowerLevelsEventContent, raw *event.Event) { + // log.Printf("[%v] Power levels for %v are %v", now, room, levels) + levelsCopy := *levels // Looks like mautrix always passes the same pointer here. + roomUsersMu.Lock() + roomPowerLevels[room] = &levelsCopy + roomUsersMu.Unlock() +} + +func eventTime(evt *event.Event) time.Time { + return time.Unix(0, evt.Timestamp*1000000) +} + +type MoreMessagesSyncer struct { + *mautrix.DefaultSyncer +} + +func newSyncer() *MoreMessagesSyncer { + return &MoreMessagesSyncer{ + DefaultSyncer: mautrix.NewDefaultSyncer(), + } +} + +func (s *MoreMessagesSyncer) GetFilterJSON(userID id.UserID) *mautrix.Filter { + f := s.DefaultSyncer.GetFilterJSON(userID) + // Same filters as Element. + f.Room.Timeline.Limit = 20 + // Only include our rooms. + f.Room.Rooms = make([]id.RoomID, 0, len(roomUsers)) + for room := range roomUsers { + f.Room.Rooms = append(f.Room.Rooms, room) + } + return f +} + +func isRoom(room id.RoomID) bool { + roomUsersMu.RLock() + defer roomUsersMu.RUnlock() + _, found := roomUsers[room] + return found +} + +func Run() (err error) { + err = InitDatabase() + if err != nil { + return fmt.Errorf("failed to init database: %v", err) + } + defer func() { + err2 := CloseDatabase() + if err2 != nil && err == nil { + err = fmt.Errorf("failed to close database: %v", err) + } + }() + logPowerLevelBounds() + config := &Config{} + err = config.Load() + if err != nil { + return fmt.Errorf("failed to load config: %v", err) + } + for _, group := range config.Rooms { + for _, room := range group { + roomUsers[room] = map[id.UserID]struct{}{} + } + } + client, err := Login(config) + if err != nil { + return fmt.Errorf("failed to login: %v", err) + } + syncer := newSyncer() + syncer.OnEventType(event.EventMessage, func(source mautrix.EventSource, evt *event.Event) { + if !isRoom(evt.RoomID) { + return + } + handleMessage(eventTime(evt), evt.RoomID, evt.Sender, evt) + }) + syncer.OnEventType(event.StateMember, func(source mautrix.EventSource, evt *event.Event) { + if !isRoom(evt.RoomID) { + return + } + mem := evt.Content.AsMember() + switch mem.Membership { + case event.MembershipJoin: + handleJoin(eventTime(evt), evt.RoomID, evt.Sender, evt) + case event.MembershipLeave: + handleLeave(eventTime(evt), evt.RoomID, evt.Sender, evt) + default: // Ignore. + } + }) + syncer.OnEventType(event.StatePowerLevels, func(source mautrix.EventSource, evt *event.Event) { + if !isRoom(evt.RoomID) { + return + } + handlePowerLevels(eventTime(evt), evt.RoomID, evt.Content.AsPowerLevels(), evt) + }) + syncer.OnSync(func(resp *mautrix.RespSync, since string) bool { + // j, _ := json.MarshalIndent(resp, "", " ") + // log.Print(string(j)) + roomUsersMu.Lock() + if since != "" && !fullySynced { + log.Print("Fully synced.") + for room, users := range roomUsers { + if len(users) == 0 { + log.Printf("Not actually joined %v yet...", room) + _, err := client.JoinRoom(string(room), "", nil) + if err != nil { + log.Printf("Failed to join %v: %v", room, err) + } + } + } + fullySynced = true + } + roomUsersMu.Unlock() + return true + }) + client.Syncer = syncer + ticker := time.NewTicker(syncInterval) + defer ticker.Stop() + go func() { + counter := 0 + for range ticker.C { + roomUsersMu.RLock() + scoreData := map[id.RoomID]map[id.UserID]*Score{} + now := time.Now() + for room := range roomUsers { + scores, err := queryUserScores(room, now) + if err != nil { + log.Fatalf("failed to query user scores: %v", err) + } + scoreData[room] = scores + } + for _, group := range config.Rooms { + for _, room := range group { + syncPowerLevels(client, room, group, scoreData, counter%syncForceFrequency == 0) + } + } + roomUsersMu.RUnlock() + counter++ + } + }() + return client.Sync() +} + +func main() { + err := Run() + if err != nil { + log.Fatalf("Program failed: %v", err) + } +} diff --git a/misc/infrastructure/powerbot/db.go b/misc/infrastructure/powerbot/db.go new file mode 100644 index 00000000..d16e11a3 --- /dev/null +++ b/misc/infrastructure/powerbot/db.go @@ -0,0 +1,182 @@ +package main + +import ( + "database/sql" + "fmt" + "maunium.net/go/mautrix/id" + _ "modernc.org/sqlite" + "time" +) + +type State int + +const ( + NotActive State = iota + Idle + Active +) + +type Score struct { + LastEvent time.Time + CurrentState State + Idle time.Duration + Active time.Duration +} + +const dbSchema = ` +CREATE TABLE IF NOT EXISTS room_users ( + room_id STRING NOT NULL, + user_id STRING NOT NULL, + state_time TIMESTAMP NOT NULL, + state INT NOT NULL, + idle_nsec INT64 NOT NULL, + active_nsec INT64 NOT NULL, + PRIMARY KEY(room_id, user_id) +); +` + +const fetchStateQuery = ` +SELECT state_time, state, idle_nsec, active_nsec +FROM room_users +WHERE room_id = ? + AND user_id = ? +` + +const insertStateQuery = ` +INSERT INTO room_users(room_id, user_id, state_time, state, idle_nsec, active_nsec) +VALUES(?, ?, ?, ?, 0.0, 0.0) +` + +const updateStateQuery = ` +UPDATE room_users +SET state_time = ?, state = ?, idle_nsec = ?, active_nsec = ? +WHERE room_id = ? + AND user_id = ? +` + +const fetchUserScoresQuery = ` +SELECT user_id, state_time, state, idle_nsec, active_nsec +FROM room_users +WHERE room_id = ? +` + +var db *sql.DB + +func InitDatabase() error { + var err error + db, err = sql.Open("sqlite", "users.sqlite") + if err != nil { + return fmt.Errorf("could not open SQLite database: %v", err) + } + _, err = db.Exec(dbSchema) + if err != nil { + return fmt.Errorf("could not set SQLite database schema: %v", err) + } + return nil +} + +func CloseDatabase() error { + return db.Close() +} + +func queryUserScores(room id.RoomID, now time.Time) (map[id.UserID]*Score, error) { + var users map[id.UserID]*Score + err := retryPolicy(func() error { + rows, err := db.Query(fetchUserScoresQuery, room) + if err != nil { + return fmt.Errorf("could not query users: %v", err) + } + users = map[id.UserID]*Score{} + for rows.Next() { + var user id.UserID + var score Score + if err := rows.Scan(&user, &score.LastEvent, &score.CurrentState, &score.Idle, &score.Active); err != nil { + return fmt.Errorf("could not scan users query result: %v", err) + } + newScore := advanceScore(score, now) + users[user] = &newScore + } + if err := rows.Err(); err != nil { + return fmt.Errorf("could not read users: %v", err) + } + return nil + }) + return users, err +} + +func advanceScore(score Score, now time.Time) Score { + if !now.After(score.LastEvent) { + return score + } + dt := now.Sub(score.LastEvent) + switch score.CurrentState { + case Idle: + score.Idle += dt + case Active: + score.Active += dt + } + return score +} + +func retryPolicy(f func() error) error { + var err error + for attempt := 0; attempt < 12; attempt++ { + err = f() + if err == nil { + return nil + } + time.Sleep(time.Millisecond * time.Duration(1< maxPrevState { + score.CurrentState = maxPrevState + } + score = advanceScore(score, now) + _, err = tx.Exec(updateStateQuery, now, state, score.Idle, score.Active, room, user) + if err != nil { + return fmt.Errorf("failed to update state for new user: %v", err) + } + return nil + } else { + _, err = tx.Exec(updateStateQuery, score.LastEvent, state, score.Idle, score.Active, room, user) + if err != nil { + return fmt.Errorf("failed to update state for new user: %v", err) + } + return nil + } + } + }) + }) +} diff --git a/misc/infrastructure/powerbot/go.mod b/misc/infrastructure/powerbot/go.mod new file mode 100644 index 00000000..bd6c064d --- /dev/null +++ b/misc/infrastructure/powerbot/go.mod @@ -0,0 +1,43 @@ +module github.com/divVerent/matrixbot + +go 1.15 + +require ( + github.com/btcsuite/btcutil v1.0.2 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/dustin/go-humanize v1.0.0 // indirect + github.com/google/go-cmp v0.5.7 + github.com/google/uuid v1.3.0 // indirect + github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect + github.com/kr/pretty v0.3.0 // indirect + github.com/kr/text v0.2.0 // indirect + github.com/mattn/go-isatty v0.0.14 // indirect + github.com/mattn/go-sqlite3 v1.14.11 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect + github.com/rogpeppe/go-internal v1.8.1 // indirect + github.com/stretchr/testify v1.7.0 // indirect + golang.org/x/crypto v0.0.0-20220128200615-198e4374d7ed // indirect + golang.org/x/mod v0.5.1 // indirect + golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect + golang.org/x/sys v0.0.0-20220128215802-99c3d69c2c27 // indirect + golang.org/x/tools v0.1.9 // indirect + golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect + gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect + gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect + lukechampine.com/uint128 v1.2.0 // indirect + maunium.net/go/mautrix v0.10.10 + modernc.org/cc/v3 v3.35.22 // indirect + modernc.org/ccgo/v3 v3.15.13 // indirect + modernc.org/ccorpus v1.11.4 // indirect + modernc.org/httpfs v1.0.6 // indirect + modernc.org/libc v1.14.5 // indirect + modernc.org/mathutil v1.4.1 // indirect + modernc.org/memory v1.0.5 // indirect + modernc.org/opt v0.1.1 // indirect + modernc.org/sqlite v1.14.5 + modernc.org/strutil v1.1.1 // indirect + modernc.org/tcl v1.11.0 // indirect + modernc.org/token v1.0.0 // indirect + modernc.org/z v1.3.0 // indirect +) diff --git a/misc/infrastructure/powerbot/go.sum b/misc/infrastructure/powerbot/go.sum new file mode 100644 index 00000000..2d64a350 --- /dev/null +++ b/misc/infrastructure/powerbot/go.sum @@ -0,0 +1,308 @@ +github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII= +github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ= +github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA= +github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg= +github.com/btcsuite/btcutil v1.0.2 h1:9iZ1Terx9fMIOtq1VrwdqfsATL9MC2l8ZrUY6YZ2uts= +github.com/btcsuite/btcutil v1.0.2/go.mod h1:j9HUFwoQRsZL3V4n+qG+CUnEGHOarIxfC3Le2Yhbcts= +github.com/btcsuite/go-socks v0.0.0-20170105172521-4720035b7bfd/go.mod h1:HHNXQzUsZCxOoE+CPiyCTO6x34Zs86zZUiwtpXoGdtg= +github.com/btcsuite/goleveldb v0.0.0-20160330041536-7834afc9e8cd/go.mod h1:F+uVaaLLH7j4eDXPRvw78tMflu7Ie2bzYOH4Y8rRKBY= +github.com/btcsuite/snappy-go v0.0.0-20151229074030-0bdef8d06723/go.mod h1:8woku9dyThutzjeg+3xrA5iCpBRH8XEEg3lh6TiUghc= +github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792/go.mod h1:ghJtEyQwv5/p4Mg4C0fgbePVuGr935/5ddU9Z3TmDRY= +github.com/btcsuite/winsvc v1.0.0/go.mod h1:jsenWakMcC0zFBFurPLEAyrnc/teJEM1O46fmI40EZs= +github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= +github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo= +github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk= +github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo= +github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= +github.com/google/go-cmp v0.5.3/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= +github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ= +github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= +github.com/google/go-cmp v0.5.7 h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o= +github.com/google/go-cmp v0.5.7/go.mod 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"maunium.net/go/mautrix" + "maunium.net/go/mautrix/event" + "maunium.net/go/mautrix/id" + "time" +) + +const ( + idleScore = 1 + activeScore = 100 + activeTime = 5 * time.Minute + // 15 minutes idling = PL 1. + minPowerScore = 15 * 60 * idleScore + minPowerLevel = 1 + // 1 year fulltime active dev = PL 10. + maxPowerScore = 3600 * (365*24*idleScore + 8*261*(activeScore-idleScore)) + maxPowerLevel = 9 + // Expire power level if no event for 1 month. Level comes back on next event, including join. + powerExpireTime = time.Hour * 24 * 30 + // Maximum count of ACL entries. Should avoid hitting the 64k limit. + maxPowerLevelEntries = 2048 +) + +func logPowerLevelBounds() { + for i := minPowerLevel; i <= maxPowerLevel; i++ { + score := minPowerScore * math.Pow(maxPowerScore/minPowerScore, float64(i-minPowerLevel)/float64(maxPowerLevel-minPowerLevel)) + log.Printf("Power level %d requires score %v (= %v idle or %v active).", + i, score, + time.Duration(float64(time.Second)*score/idleScore), + time.Duration(float64(time.Second)*score/activeScore), + ) + } +} + +func computePowerLevel(def int, score Score) (int, float64) { + points := score.Idle.Seconds()*idleScore + score.Active.Seconds()*activeScore + if points <= 0 { + return def, math.Inf(-1) + } + raw := minPowerLevel + (maxPowerLevel-minPowerLevel)*math.Log(points/minPowerScore)/math.Log(maxPowerScore/minPowerScore) + if raw < minPowerLevel { + return def, raw + } + if points > maxPowerScore { + return maxPowerLevel, raw + } + return int(math.Floor(raw)), raw +} + +func allPowerLevels(roomLevels *event.PowerLevelsEventContent) []int { + ret := make([]int, 0, len(roomLevels.Events)+5) + for _, level := range roomLevels.Events { + ret = append(ret, level) + } + ret = append(ret, roomLevels.EventsDefault) + if roomLevels.InvitePtr != nil { + ret = append(ret, *roomLevels.InvitePtr) + } + if roomLevels.KickPtr != nil { + ret = append(ret, *roomLevels.KickPtr) + } + if roomLevels.BanPtr != nil { + ret = append(ret, *roomLevels.BanPtr) + } + if roomLevels.RedactPtr != nil { + ret = append(ret, *roomLevels.RedactPtr) + } + return ret +} + +func syncPowerLevels(client *mautrix.Client, room id.RoomID, roomGroup []id.RoomID, scores map[id.RoomID]map[id.UserID]*Score, force bool) { + roomLevels := roomPowerLevels[room] + if roomLevels == nil { + log.Printf("trying to ensure power levels for room %v, but did not get power level map yet", room) + return + } + tryUpdate := force + for _, level := range allPowerLevels(roomLevels) { + if minPowerLevel <= level && level <= maxPowerLevel { + tryUpdate = true + } + } + if !tryUpdate { + log.Printf("room %v skipping because PLs currently do not matter", room) + return + } + log.Printf("room %v considering to update PLs", room) + if fullySynced { + for user, score := range scores[room] { + // Expire users that for some reason did not get pruned from the database. + // This may cause them to lose their power level below. + if _, found := roomUsers[room][user]; !found && score.CurrentState != NotActive { + log.Printf("Pruning long inactive user %v from room %v.", user, room) + setUserStateAt(room, user, time.Now(), NotActive, NotActive) + score.CurrentState = NotActive + } + } + } + newRoomLevels := *roomLevels + newRoomLevels.Users = make(map[id.UserID]int) + for user, level := range roomLevels.Users { + if level == roomLevels.UsersDefault { + continue + } + // TODO: Also skip users who aren't in the room for ages. + score := scores[room][user] + if level >= minPowerLevel && level <= maxPowerLevel && score.CurrentState == NotActive && time.Now().After(score.LastEvent.Add(powerExpireTime)) { + // User is inactive - prune them from the power level list. Saves space. + // But this doesn't mark the list dirty as there is no need to send an update. + log.Printf("room %v user %v power level: PRUNE %v (%v)", room, user, level, score) + continue + } + newRoomLevels.Users[user] = level + } + dirty := false + log.Printf("room %v", room) + for user, score := range scores[room] { + if score.CurrentState == NotActive { + // Do not add/bump power levels for users not in the room. + continue + } + prevLevel := roomLevels.Users[user] + level, raw := computePowerLevel(roomLevels.UsersDefault, *score) + for _, otherRoom := range roomGroup { + if otherRoom == room { + continue + } + otherScore := scores[otherRoom][user] + if otherScore == nil { + continue + } + otherLevel, otherRaw := computePowerLevel(roomLevels.UsersDefault, *otherScore) + if otherLevel > level { + level = otherLevel + } + if otherRaw > raw { + raw = otherRaw + } + } + if level > prevLevel { + log.Printf("room %v user %v power level: INCREASE %v -> %v (%v, %v)", room, user, prevLevel, level, raw, score) + newRoomLevels.Users[user] = level + dirty = true + } else if level < prevLevel { + log.Printf("room %v user %v power level: SKIP %v -> %v (%v, %v)", room, user, prevLevel, level, raw, score) + } else { + log.Printf("room %v user %v power level: KEEP %v -> %v (%v, %v)", room, user, prevLevel, level, raw, score) + } + } + clearPowerLevel := minPowerLevel + for len(newRoomLevels.Users) > maxPowerLevelEntries && clearPowerLevel <= maxPowerLevel { + log.Printf("room %v not including power level %d to reduce message size", clearPowerLevel) + for user, level := range newRoomLevels.Users { + if level == clearPowerLevel { + delete(newRoomLevels.Users, user) + dirty = true + } + } + clearPowerLevel++ + } + if dirty { + diff := cmp.Diff(roomLevels.Users, newRoomLevels.Users) + log.Printf("room %v power level update:\n%v", room, diff) + _, err := client.SendStateEvent(room, event.StatePowerLevels, "", newRoomLevels) + if err != nil { + log.Printf("Failed to update power levels: %v", err) + } + } else { + log.Printf("room %v nothing to update", room) + } +}