Attach prefix to OOB descriptions and omit empty ones only if sender is displayed by carbon

This reverts commit 563cb2d624.

.gitignore

@@ -3,3 +3,5 @@ telegabber
 sessions/
 session.dat
 session.dat.new
+release/
+tdlib/

Dockerfile

@@ -0,0 +1,36 @@
+FROM golang:1.19-bookworm AS base
+
+RUN apt-get update
+run apt-get install -y libssl-dev cmake build-essential gperf libz-dev make git
+
+FROM base AS tdlib
+
+ARG TD_COMMIT
+ARG MAKEOPTS
+RUN git clone https://github.com/tdlib/td /src/
+RUN git -C /src/ checkout "${TD_COMMIT}"
+RUN mkdir build
+WORKDIR /build/
+RUN cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/compiled/ /src/
+RUN cmake --build . ${MAKEOPTS}
+RUN make install
+
+FROM base AS cache
+ARG VERSION
+COPY --from=tdlib /compiled/ /usr/local/
+COPY ./ /src
+RUN git -C /src checkout "${VERSION}"
+WORKDIR /src
+RUN go get
+
+FROM cache AS build
+ARG MAKEOPTS
+WORKDIR /src
+RUN make ${MAKEOPTS}
+
+FROM scratch AS telegabber
+COPY --from=build /src/release/telegabber /usr/local/bin/
+ENTRYPOINT ["/usr/local/bin/telegabber"]
+
+FROM scratch AS binaries
+COPY --from=telegabber /usr/local/bin/telegabber /

Makefile

@@ -1,12 +1,25 @@
 .PHONY: all test
 
 COMMIT := $(shell git rev-parse --short HEAD)
+TD_COMMIT := "5bbfc1cf5dab94f82e02f3430ded7241d4653551"
+VERSION := "v1.9.6"
+MAKEOPTS := "-j4"
 
 all:
-	go build -ldflags "-X main.commit=${COMMIT}" -o telegabber
+	mkdir -p release
+	go build -ldflags "-X main.commit=${COMMIT}" -o release/telegabber
 
 test:
 	go test -v ./config ./ ./telegram ./xmpp ./xmpp/gateway ./persistence ./telegram/formatter ./badger
 
 lint:
 	$(GOPATH)/bin/golint ./...
+
+build_indocker:
+	docker build --build-arg "TD_COMMIT=${TD_COMMIT}" --build-arg "VERSION=${VERSION}" --build-arg "MAKEOPTS=${MAKEOPTS}" --output=release --target binaries .
+
+build_indocker_staging:
+	DOCKER_BUILDKIT=1 docker build --build-arg "TD_COMMIT=${TD_COMMIT}" --build-arg "MAKEOPTS=${MAKEOPTS}" --network host --output=release --target binaries -f staging.Dockerfile .
+
+build_tdlib:
+	DOCKER_BUILDKIT=1 docker build --build-arg "TD_COMMIT=${TD_COMMIT}" --build-arg "MAKEOPTS=${MAKEOPTS}" --output=tdlib --target binaries -f tdlib.Dockerfile .

go.mod

@@ -34,3 +34,4 @@ require (
 )
 
 replace gosrc.io/xmpp => dev.narayana.im/narayana/go-xmpp v0.0.0-20220524203317-306b4ff58e8f
+replace github.com/zelenin/go-tdlib => dev.narayana.im/narayana/go-tdlib v0.0.0-20240124222245-b4c12addb061

go.sum

@@ -1,4 +1,10 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+dev.narayana.im/narayana/go-tdlib v0.0.0-20230730021136-47da33180615 h1:RRUZJSro+k8FkazNx7QEYLVoO4wZtchvsd0Y2RBWjeU=
+dev.narayana.im/narayana/go-tdlib v0.0.0-20230730021136-47da33180615/go.mod h1:Xs8fXbk5n7VaPyrSs9DP7QYoBScWYsjX+lUcWmx1DIU=
+dev.narayana.im/narayana/go-tdlib v0.0.0-20231111182840-bc2f985e6268 h1:NCbc2bYuUGQsb/3z5SCIia3N34Ktwq3FwaUAfgF/WEU=
+dev.narayana.im/narayana/go-tdlib v0.0.0-20231111182840-bc2f985e6268/go.mod h1:Xs8fXbk5n7VaPyrSs9DP7QYoBScWYsjX+lUcWmx1DIU=
+dev.narayana.im/narayana/go-tdlib v0.0.0-20240124222245-b4c12addb061 h1:CWAQT74LwQne/3Po5KXDvudu3N0FBWm3XZZZhtl5j2w=
+dev.narayana.im/narayana/go-tdlib v0.0.0-20240124222245-b4c12addb061/go.mod h1:Xs8fXbk5n7VaPyrSs9DP7QYoBScWYsjX+lUcWmx1DIU=
 dev.narayana.im/narayana/go-xmpp v0.0.0-20220524203317-306b4ff58e8f h1:6249ajbMjgYz53Oq0IjTvjHXbxTfu29Mj1J/6swRHs4=
 dev.narayana.im/narayana/go-xmpp v0.0.0-20220524203317-306b4ff58e8f/go.mod h1:L3NFMqYOxyLz3JGmgFyWf7r9htE91zVGiK40oW4RwdY=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=

persistence/sessions.go

@@ -3,6 +3,7 @@ package persistence
 import (
 	"github.com/pkg/errors"
 	"io/ioutil"
+	"sync"
 	"time"
 
 	"dev.narayana.im/narayana/telegabber/yamldb"
@@ -42,6 +43,10 @@ type Session struct {
 	OOBMode         bool           `yaml:":oobmode"`
 	Carbons         bool           `yaml:":carbons"`
 	HideIds         bool           `yaml:":hideids"`
+	Receipts        bool           `yaml:":receipts"`
+	NativeEdits     bool           `yaml:":nativeedits"`
+	IgnoredChats    []int64        `yaml:":ignoredchats"`
+	ignoredChatsMap map[int64]bool `yaml:"-"`
 }
 
 var configKeys = []string{
@@ -52,17 +57,26 @@ var configKeys = []string{
 	"oobmode",
 	"carbons",
 	"hideids",
+	"receipts",
+	"nativeedits",
 }
 
 var sessionDB *SessionsYamlDB
+var sessionsLock sync.Mutex
 
 // SessionMarshaller implementation for YamlDB
 func SessionMarshaller() ([]byte, error) {
 	cleanedMap := SessionsMap{}
 	emptySessionsMap(&cleanedMap)
 
+	sessionsLock.Lock()
+	defer sessionsLock.Unlock()
 	for jid, session := range sessionDB.Data.Sessions {
 		if session.Login != "" {
+			session.IgnoredChats = make([]int64, 0, len(session.ignoredChatsMap))
+			for chatID := range session.ignoredChatsMap {
+				session.IgnoredChats = append(session.IgnoredChats, chatID)
+			}
 			cleanedMap.Sessions[jid] = session
 		}
 	}
@@ -104,6 +118,16 @@ func initYamlDB(path string, dataPtr *SessionsMap) (*SessionsYamlDB, error) {
 		emptySessionsMap(dataPtr)
 	}
 
+	// convert ignored users slice to map
+	for jid, session := range dataPtr.Sessions {
+		session.ignoredChatsMap = make(map[int64]bool)
+		for _, chatID := range session.IgnoredChats {
+			session.ignoredChatsMap[chatID] = true
+		}
+		session.IgnoredChats = nil
+		dataPtr.Sessions[jid] = session
+	}
+
 	return &SessionsYamlDB{
 		YamlDB: yamldb.YamlDB{
 			Path:    path,
@@ -115,6 +139,13 @@ func initYamlDB(path string, dataPtr *SessionsMap) (*SessionsYamlDB, error) {
 
 // Get retrieves a session value
 func (s *Session) Get(key string) (string, error) {
+	sessionsLock.Lock()
+	defer sessionsLock.Unlock()
+
+	return s.get(key)
+}
+
+func (s *Session) get(key string) (string, error) {
 	switch key {
 	case "timezone":
 		return s.Timezone, nil
@@ -130,6 +161,10 @@ func (s *Session) Get(key string) (string, error) {
 		return fromBool(s.Carbons), nil
 	case "hideids":
 		return fromBool(s.HideIds), nil
+	case "receipts":
+		return fromBool(s.Receipts), nil
+	case "nativeedits":
+		return fromBool(s.NativeEdits), nil
 	}
 
 	return "", errors.New("Unknown session property")
@@ -137,9 +172,12 @@ func (s *Session) Get(key string) (string, error) {
 
 // ToMap converts the session to a map
 func (s *Session) ToMap() map[string]string {
+	sessionsLock.Lock()
+	defer sessionsLock.Unlock()
+
 	m := make(map[string]string)
 	for _, configKey := range configKeys {
-		value, _ := s.Get(configKey)
+		value, _ := s.get(configKey)
 		m[configKey] = value
 	}
 
@@ -148,6 +186,9 @@ func (s *Session) ToMap() map[string]string {
 
 // Set sets a session value
 func (s *Session) Set(key string, value string) (string, error) {
+	sessionsLock.Lock()
+	defer sessionsLock.Unlock()
+
 	switch key {
 	case "timezone":
 		s.Timezone = value
@@ -194,6 +235,20 @@ func (s *Session) Set(key string, value string) (string, error) {
 		}
 		s.HideIds = b
 		return value, nil
+	case "receipts":
+		b, err := toBool(value)
+		if err != nil {
+			return "", err
+		}
+		s.Receipts = b
+		return value, nil
+	case "nativeedits":
+		b, err := toBool(value)
+		if err != nil {
+			return "", err
+		}
+		s.NativeEdits = b
+		return value, nil
 	}
 
 	return "", errors.New("Unknown session property")
@@ -210,6 +265,51 @@ func (s *Session) TimezoneToLocation() *time.Location {
 	return zeroLocation
 }
 
+// IgnoreChat adds a chat id to ignore list, returns false if already ignored
+func (s *Session) IgnoreChat(chatID int64) bool {
+	sessionsLock.Lock()
+	defer sessionsLock.Unlock()
+
+	if s.ignoredChatsMap == nil {
+		s.ignoredChatsMap = make(map[int64]bool)
+	} else if _, ok := s.ignoredChatsMap[chatID]; ok {
+		return false
+	}
+
+	s.ignoredChatsMap[chatID] = true
+	return true
+}
+
+// UnignoreChat removes a chat id from ignore list, returns false if not already ignored
+func (s *Session) UnignoreChat(chatID int64) bool {
+	sessionsLock.Lock()
+	defer sessionsLock.Unlock()
+
+	if s.ignoredChatsMap == nil {
+		return false
+	}
+
+	if _, ok := s.ignoredChatsMap[chatID]; !ok {
+		return false
+	}
+
+	delete(s.ignoredChatsMap, chatID)
+	return true
+}
+
+// IsChatIgnored checks the chat id against the ignore list
+func (s *Session) IsChatIgnored(chatID int64) bool {
+	sessionsLock.Lock()
+	defer sessionsLock.Unlock()
+
+	if s.ignoredChatsMap == nil {
+		return false
+	}
+
+	_, ok := s.ignoredChatsMap[chatID]
+	return ok
+}
+
 func fromBool(b bool) string {
 	if b {
 		return "true"

persistence/sessions_test.go

@@ -48,6 +48,7 @@ func TestSessionToMap(t *testing.T) {
 		Timezone:    "klsf",
 		RawMessages: true,
 		OOBMode:     true,
+		Receipts:    true,
 	}
 	m := session.ToMap()
 	sample := map[string]string{
@@ -58,6 +59,8 @@ func TestSessionToMap(t *testing.T) {
 		"oobmode":     "true",
 		"carbons":     "false",
 		"hideids":     "false",
+		"receipts":    "true",
+		"nativeedits": "false",
 	}
 	if !reflect.DeepEqual(m, sample) {
 		t.Errorf("Map does not match the sample: %v", m)
@@ -85,3 +88,31 @@ func TestSessionSetAbsent(t *testing.T) {
 		t.Error("There shouldn't come a donkey!")
 	}
 }
+
+func TestSessionIgnore(t *testing.T) {
+	session := Session{}
+	if session.IsChatIgnored(3) {
+		t.Error("Shouldn't be ignored yet")
+	}
+	if !session.IgnoreChat(3) {
+		t.Error("Shouldn't have been ignored")
+	}
+	if session.IgnoreChat(3) {
+		t.Error("Shouldn't ignore second time")
+	}
+	if !session.IsChatIgnored(3) {
+		t.Error("Should be ignored already")
+	}
+	if session.IsChatIgnored(-145) {
+		t.Error("Wrong chat is ignored")
+	}
+	if !session.UnignoreChat(3) {
+		t.Error("Should successfully unignore")
+	}
+	if session.UnignoreChat(3) {
+		t.Error("Should unignore second time")
+	}
+	if session.IsChatIgnored(3) {
+		t.Error("Shouldn't be ignored already")
+	}
+}

staging.Dockerfile

@@ -0,0 +1,46 @@
+FROM golang:1.19-bullseye AS base
+
+RUN apt-get update
+RUN apt-get install -y libssl-dev cmake build-essential gperf libz-dev make git php
+
+FROM base AS tdlib
+
+ARG TD_COMMIT
+ARG MAKEOPTS
+RUN git clone https://github.com/tdlib/td /src/
+RUN git -C /src/ checkout "${TD_COMMIT}"
+RUN mkdir build
+WORKDIR /build/
+RUN cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/compiled/ /src/
+RUN cmake --build . --target prepare_cross_compiling ${MAKEOPTS}
+WORKDIR /src/
+RUN php SplitSource.php
+WORKDIR /build/
+RUN cmake --build . ${MAKEOPTS}
+RUN make install
+
+FROM base AS cache
+ARG VERSION
+COPY --from=tdlib /compiled/ /usr/local/
+WORKDIR /src
+RUN go env -w GOCACHE=/go-cache
+RUN go env -w GOMODCACHE=/gomod-cache
+RUN --mount=type=cache,target=/gomod-cache \
+    --mount=type=bind,source=./,target=/src \
+    go mod download
+
+FROM cache AS build
+ARG MAKEOPTS
+WORKDIR /src
+RUN --mount=type=bind,source=./,target=/src,rw \
+    --mount=type=cache,target=/go-cache \
+    --mount=type=cache,target=/gomod-cache \
+    --mount=type=cache,destination=/src/release \
+    make ${MAKEOPTS}
+
+FROM build AS release
+RUN --mount=type=cache,destination=/src/release \
+    cp /src/release/telegabber /
+
+FROM scratch AS binaries
+COPY --from=release /telegabber /

tdlib.Dockerfile

@@ -0,0 +1,23 @@
+FROM golang:1.19-bullseye AS base
+
+RUN apt-get update
+RUN apt-get install -y libssl-dev cmake build-essential gperf libz-dev make git php
+
+FROM base AS tdlib
+
+ARG TD_COMMIT
+ARG MAKEOPTS
+RUN git clone https://github.com/tdlib/td /src/
+RUN git -C /src/ checkout "${TD_COMMIT}"
+RUN mkdir build
+WORKDIR /build/
+RUN cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/compiled/ /src/
+RUN cmake --build . --target prepare_cross_compiling ${MAKEOPTS}
+WORKDIR /src/
+RUN php SplitSource.php
+WORKDIR /build/
+RUN cmake --build . ${MAKEOPTS}
+RUN make install
+
+FROM scratch AS binaries
+COPY --from=tdlib /compiled/ /

telegabber.go

@@ -12,10 +12,11 @@ import (
 	"dev.narayana.im/narayana/telegabber/xmpp"
 
 	log "github.com/sirupsen/logrus"
+	"github.com/zelenin/go-tdlib/client"
 	goxmpp "gosrc.io/xmpp"
 )
 
-var version string = "1.6.1-dev"
+var version string = "1.9.6"
 var commit string
 
 var sm *goxmpp.StreamManager
@@ -60,6 +61,9 @@ func main() {
 		log.Fatal(err)
 	}
 
+	client.SetLogVerbosityLevel(&client.SetLogVerbosityLevelRequest{
+		NewVerbosityLevel: stringToTdlibLogConstant(config.Telegram.Loglevel),
+	})
 	SetLogrusLevel(config.XMPP.Loglevel)
 
 	log.Infof("Starting telegabber version %v", version)
@@ -89,6 +93,25 @@ func main() {
 	}
 }
 
+var tdlibLogConstants = map[string]int32{
+	":fatal":   0,
+	":error":   1,
+	":warn":    2,
+	":info":    3,
+	":debug":   4,
+	":verbose": 5,
+	":all":     1023,
+}
+
+func stringToTdlibLogConstant(c string) int32 {
+	level, ok := tdlibLogConstants[c]
+	if !ok {
+		level = 0
+	}
+
+	return level
+}
+
 func exit() {
 	xmpp.Close(component)
 	close(cleanupDone)

telegabber_test.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestTdlibLogInfo(t *testing.T) {
+	tdlibConstant := stringToTdlibLogConstant(":info")
+	if tdlibConstant != 3 {
+		t.Errorf("Wrong TDlib constant for info")
+	}
+}
+
+func TestTdlibLogInvalid(t *testing.T) {
+	tdlibConstant := stringToTdlibLogConstant("ziz")
+	if tdlibConstant != 0 {
+		t.Errorf("Unknown strings should return fatal loglevel")
+	}
+}

telegram/cache/cache.go

@@ -133,3 +133,13 @@ func (cache *Cache) SetStatus(id int64, show string, status string) {
 		Description: status,
 	}
 }
+
+// Destruct splits a cached status into show, description and type
+func (status *Status) Destruct() (show, description, typ string) {
+	show, description = status.XMPP, status.Description
+	if show == "unavailable" {
+		typ = show
+		show = ""
+	}
+	return
+}

telegram/client.go

@@ -2,6 +2,7 @@ package telegram
 
 import (
 	"github.com/pkg/errors"
+	"hash/maphash"
 	"path/filepath"
 	"strconv"
 	"sync"
@@ -15,25 +16,6 @@ import (
 	"gosrc.io/xmpp"
 )
 
-var logConstants = map[string]int32{
-	":fatal":   0,
-	":error":   1,
-	":warn":    2,
-	":info":    3,
-	":debug":   4,
-	":verbose": 5,
-	":all":     1023,
-}
-
-func stringToLogConstant(c string) int32 {
-	level, ok := logConstants[c]
-	if !ok {
-		level = 0
-	}
-
-	return level
-}
-
 // DelayedStatus describes an online status expiring on timeout
 type DelayedStatus struct {
 	TimestampOnline  int64
@@ -44,7 +26,7 @@ type DelayedStatus struct {
 type Client struct {
 	client     *client.Client
 	authorizer *clientAuthorizer
-	parameters *client.TdlibParameters
+	parameters *client.SetTdlibParametersRequest
 	options    []client.Option
 	me         *client.User
 
@@ -56,26 +38,37 @@ type Client struct {
 	cache     *cache.Cache
 	online    bool
 
+	outbox     map[string]string
+	editOutbox map[string]string
+
 	DelayedStatuses     map[int64]*DelayedStatus
 	DelayedStatusesLock sync.Mutex
 
+	lastMsgHashes map[int64]uint64
+	lastMsgIds    map[int64]string
+	msgHashSeed   maphash.Seed
+
 	locks           clientLocks
+	SendMessageLock sync.Mutex
 }
 
 type clientLocks struct {
 	authorizationReady sync.Mutex
 	chatMessageLocks   map[int64]*sync.Mutex
 	resourcesLock      sync.Mutex
+	outboxLock         sync.Mutex
+	editOutboxLock     sync.Mutex
+	lastMsgHashesLock  sync.Mutex
+	lastMsgIdsLock     sync.RWMutex
+
+	authorizerReadLock  sync.Mutex
+	authorizerWriteLock sync.Mutex
 }
 
 // NewClient instantiates a Telegram App
 func NewClient(conf config.TelegramConfig, jid string, component *xmpp.Component, session *persistence.Session) (*Client, error) {
 	var options []client.Option
 
-	options = append(options, client.WithLogVerbosity(&client.SetLogVerbosityLevelRequest{
-		NewVerbosityLevel: stringToLogConstant(conf.Loglevel),
-	}))
-
 	if conf.Tdlib.Client.CatchTimeout != 0 {
 		options = append(options, client.WithCatchTimeout(
 			time.Duration(conf.Tdlib.Client.CatchTimeout)*time.Second,
@@ -92,7 +85,7 @@ func NewClient(conf config.TelegramConfig, jid string, component *xmpp.Component
 		datadir = "./sessions/" // ye olde defaute
 	}
 
-	parameters := client.TdlibParameters{
+	parameters := client.SetTdlibParametersRequest{
 		UseTestDc: false,
 
 		DatabaseDirectory: filepath.Join(datadir, jid),
@@ -123,8 +116,13 @@ func NewClient(conf config.TelegramConfig, jid string, component *xmpp.Component
 		resources:       make(map[string]bool),
 		content:         &conf.Content,
 		cache:           cache.NewCache(),
+		outbox:          make(map[string]string),
+		editOutbox:      make(map[string]string),
 		options:         options,
 		DelayedStatuses: make(map[int64]*DelayedStatus),
+		lastMsgHashes:   make(map[int64]uint64),
+		lastMsgIds:      make(map[int64]string),
+		msgHashSeed:     maphash.MakeSeed(),
 		locks: clientLocks{
 			chatMessageLocks: make(map[int64]*sync.Mutex),
 		},

telegram/client_test.go

@@ -1,19 +0,0 @@
-package telegram
-
-import (
-	"testing"
-)
-
-func TestLogInfo(t *testing.T) {
-	tdlibConstant := stringToLogConstant(":info")
-	if tdlibConstant != 3 {
-		t.Errorf("Wrong TDlib constant for info")
-	}
-}
-
-func TestLogInvalid(t *testing.T) {
-	tdlibConstant := stringToLogConstant("ziz")
-	if tdlibConstant != 0 {
-		t.Errorf("Unknown strings should return fatal loglevel")
-	}
-}

telegram/commands.go

@@ -15,11 +15,11 @@ import (
 )
 
 const notEnoughArguments string = "Not enough arguments"
-const telegramNotInitialized string = "Telegram connection is not initialized yet"
+const TelegramNotInitialized string = "Telegram connection is not initialized yet"
+const TelegramAuthDone string = "Authorization is done already"
 const notOnline string = "Not online"
 
-var permissionsAdmin = client.ChatMemberStatusAdministrator{
-	CanBeEdited:        true,
+var permissionsAdmin = client.ChatAdministratorRights{
 	CanChangeInfo:      true,
 	CanPostMessages:    true,
 	CanEditMessages:    true,
@@ -30,14 +30,20 @@ var permissionsAdmin = client.ChatMemberStatusAdministrator{
 	CanPromoteMembers:  false,
 }
 var permissionsMember = client.ChatPermissions{
-	CanSendMessages:       true,
-	CanSendMediaMessages:  true,
+	CanSendBasicMessages:  true,
+	CanSendAudios:         true,
+	CanSendDocuments:      true,
+	CanSendPhotos:         true,
+	CanSendVideos:         true,
+	CanSendVideoNotes:     true,
+	CanSendVoiceNotes:     true,
 	CanSendPolls:          true,
 	CanSendOtherMessages:  true,
 	CanAddWebPagePreviews: true,
 	CanChangeInfo:         true,
 	CanInviteUsers:        true,
 	CanPinMessages:        true,
+	CanManageTopics:       true,
 }
 var permissionsReadonly = client.ChatPermissions{}
 
@@ -79,8 +85,8 @@ var chatCommands = map[string]command{
 	"invite":     command{"id or @username", "add user to current chat"},
 	"link":       command{"", "get invite link for current chat"},
 	"kick":       command{"id or @username", "remove user to current chat"},
-	"mute":       command{"id or @username [hours]", "mute user in current chat"},
-	"unmute":     command{"id or @username", "unrestrict user from current chat"},
+	"mute":       command{"[id or @username] [hours]", "mute the whole chat or a user in current chat"},
+	"unmute":     command{"[id or @username]", "unmute the whole chat or a user in the current chat"},
 	"ban":        command{"id or @username [hours]", "restrict @username from current chat for [hours] or forever"},
 	"unban":      command{"id or @username", "unbans @username in current chat (and devotes from admins)"},
 	"promote":    command{"id or @username [title]", "promote user to admin in current chat"},
@@ -179,18 +185,14 @@ func keyValueString(key, value string) string {
 }
 
 func (c *Client) unsubscribe(chatID int64) error {
-	return gateway.SendPresence(
-		c.xmpp,
-		c.jid,
-		gateway.SPFrom(strconv.FormatInt(chatID, 10)),
-		gateway.SPType("unsubscribed"),
-	)
+	args := gateway.SimplePresence(chatID, "unsubscribed")
+	return c.sendPresence(args...)
 }
 
 func (c *Client) sendMessagesReverse(chatID int64, messages []*client.Message) {
 	for i := len(messages) - 1; i >= 0; i-- {
 		message := messages[i]
-		reply, _ := c.getMessageReply(message)
+		reply, _ := c.getMessageReply(message, false, true)
 
 		gateway.SendMessage(
 			c.jid,
@@ -199,8 +201,9 @@ func (c *Client) sendMessagesReverse(chatID int64, messages []*client.Message) {
 			strconv.FormatInt(message.Id, 10),
 			c.xmpp,
 			reply,
-			false,
 			"",
+			false,
+			false,
 		)
 	}
 }
@@ -240,34 +243,28 @@ func (c *Client) ProcessTransportCommand(cmdline string, resource string) string
 		}
 
 		if cmd == "login" {
-			wasSessionLoginEmpty := c.Session.Login == ""
-			c.Session.Login = args[0]
-
-			if wasSessionLoginEmpty && c.authorizer == nil {
-				go func() {
-					err := c.Connect(resource)
+			err := c.TryLogin(resource, args[0])
 			if err != nil {
-						log.Error(errors.Wrap(err, "TDlib connection failure"))
-					}
-				}()
-				// a quirk for authorizer to become ready. If it's still not,
-				// nothing bad: the command just needs to be resent again
-				time.Sleep(1e5)
-			}
+				return err.Error()
 			}
 
+			c.locks.authorizerWriteLock.Lock()
+			defer c.locks.authorizerWriteLock.Unlock()
+
+			c.authorizer.PhoneNumber <- args[0]
+		} else {
+			c.locks.authorizerWriteLock.Lock()
+			defer c.locks.authorizerWriteLock.Unlock()
+
 			if c.authorizer == nil {
-			return telegramNotInitialized
+				return TelegramNotInitialized
 			}
 
 			if c.authorizer.isClosed {
-			return "Authorization is done already"
+				return TelegramAuthDone
 			}
 
 			switch cmd {
-		// sign in
-		case "login":
-			c.authorizer.PhoneNumber <- args[0]
 			// check auth code
 			case "code":
 				c.authorizer.Code <- args[0]
@@ -275,22 +272,22 @@ func (c *Client) ProcessTransportCommand(cmdline string, resource string) string
 			case "password":
 				c.authorizer.Password <- args[0]
 			}
+		}
 	// sign out
 	case "logout":
 		if !c.Online() {
 			return notOnline
 		}
 
-		for _, id := range c.cache.ChatsKeys() {
-			c.unsubscribe(id)
-		}
-
 		_, err := c.client.LogOut()
 		if err != nil {
-			c.forceClose()
 			return errors.Wrap(err, "Logout error").Error()
 		}
 
+		for _, id := range c.cache.ChatsKeys() {
+			c.unsubscribe(id)
+		}
+
 		c.Session.Login = ""
 	// cancel auth
 	case "cancelauth":
@@ -330,10 +327,13 @@ func (c *Client) ProcessTransportCommand(cmdline string, resource string) string
 			lastname = rawCmdArguments(cmdline, 1)
 		}
 
+		c.locks.authorizerWriteLock.Lock()
 		if c.authorizer != nil && !c.authorizer.isClosed {
 			c.authorizer.FirstName <- firstname
 			c.authorizer.LastName <- lastname
+			c.locks.authorizerWriteLock.Unlock()
 		} else {
+			c.locks.authorizerWriteLock.Unlock()
 			if !c.Online() {
 				return notOnline
 			}
@@ -380,7 +380,8 @@ func (c *Client) ProcessTransportCommand(cmdline string, resource string) string
 		}
 	case "config":
 		if len(args) > 1 {
-			if !gateway.MessageOutgoingPermission && args[0] == "carbons" && args[1] == "true" {
+			var msg string
+			if gateway.MessageOutgoingPermissionVersion == 0 && args[0] == "carbons" && args[1] == "true" {
 				return "The server did not allow to enable carbons"
 			}
 
@@ -390,7 +391,7 @@ func (c *Client) ProcessTransportCommand(cmdline string, resource string) string
 			}
 			gateway.DirtySessions = true
 
-			return fmt.Sprintf("%s set to %s", args[0], value)
+			return fmt.Sprintf("%s%s set to %s", msg, args[0], value)
 		} else if len(args) > 0 {
 			value, err := c.Session.Get(args[0])
 			if err != nil {
@@ -419,7 +420,7 @@ func (c *Client) ProcessTransportCommand(cmdline string, resource string) string
 		text := rawCmdArguments(cmdline, 1)
 		_, err = c.client.ReportChat(&client.ReportChatRequest{
 			ChatId: contact.Id,
-			Reason: &client.ChatReportReasonCustom{},
+			Reason: &client.ReportReasonCustom{},
 			Text:   text,
 		})
 		if err != nil {
@@ -514,11 +515,14 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		content := c.PrepareOutgoingMessageContent(rawCmdArguments(cmdline, 0))
 
 		if content != nil {
-			c.client.EditMessageText(&client.EditMessageTextRequest{
+			_, err = c.client.EditMessageText(&client.EditMessageTextRequest{
 				ChatId:              chatID,
 				MessageId:           message.Id,
 				InputMessageContent: content,
 			})
+			if err != nil {
+				return "Message editing error", true
+			}
 		} else {
 			return "Message processing error", true
 		}
@@ -664,7 +668,7 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		entries := []string{
 			keyValueString("Chat title", info.Fn),
 			keyValueString("Photo", link),
-			keyValueString("Username", info.Nickname),
+			keyValueString("Usernames", c.usernamesToString(info.Nicknames)),
 			keyValueString("Full name", info.Given+" "+info.Family),
 			keyValueString("Phone number", info.Tel),
 		}
@@ -704,18 +708,18 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		}
 	// blacklists current user
 	case "block":
-		_, err := c.client.ToggleMessageSenderIsBlocked(&client.ToggleMessageSenderIsBlockedRequest{
+		_, err := c.client.SetMessageSenderBlockList(&client.SetMessageSenderBlockListRequest{
 			SenderId:  &client.MessageSenderUser{UserId: chatID},
-			IsBlocked: true,
+			BlockList: &client.BlockListMain{},
 		})
 		if err != nil {
 			return err.Error(), true
 		}
 	// unblacklists current user
 	case "unblock":
-		_, err := c.client.ToggleMessageSenderIsBlocked(&client.ToggleMessageSenderIsBlockedRequest{
+		_, err := c.client.SetMessageSenderBlockList(&client.SetMessageSenderBlockListRequest{
 			SenderId:  &client.MessageSenderUser{UserId: chatID},
-			IsBlocked: false,
+			BlockList: nil,
 		})
 		if err != nil {
 			return err.Error(), true
@@ -767,12 +771,9 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		if err != nil {
 			return err.Error(), true
 		}
-	// mute @username [n hours]
+	// mute [@username [n hours]]
 	case "mute":
-		if len(args) < 1 {
-			return notEnoughArguments, true
-		}
-
+		if len(args) > 0 {
 			contact, _, err := c.GetContactByUsername(args[0])
 			if err != nil {
 				return err.Error(), true
@@ -798,12 +799,15 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 			if err != nil {
 				return err.Error(), true
 			}
-	// unmute @username
-	case "unmute":
-		if len(args) < 1 {
-			return notEnoughArguments, true
+		} else {
+			if !c.Session.IgnoreChat(chatID) {
+				return "Chat is already ignored", true
 			}
-
+			gateway.DirtySessions = true
+		}
+	// unmute [@username]
+	case "unmute":
+		if len(args) > 0 {
 			contact, _, err := c.GetContactByUsername(args[0])
 			if err != nil {
 				return err.Error(), true
@@ -821,6 +825,12 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 			if err != nil {
 				return err.Error(), true
 			}
+		} else {
+			if !c.Session.UnignoreChat(chatID) {
+				return "Chat wasn't ignored", true
+			}
+			gateway.DirtySessions = true
+		}
 	// ban @username from current chat [for N hours]
 	case "ban":
 		if len(args) < 1 {
@@ -881,7 +891,10 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 		}
 
 		// clone the permissions
-		status := permissionsAdmin
+		status := client.ChatMemberStatusAdministrator{
+			CanBeEdited: true,
+			Rights:      &permissionsAdmin,
+		}
 
 		if len(args) > 1 {
 			status.CustomTitle = args[1]
@@ -931,9 +944,9 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 				return "Invalid TTL", true
 			}
 		}
-		_, err = c.client.SetChatMessageTtl(&client.SetChatMessageTtlRequest{
+		_, err = c.client.SetChatMessageAutoDeleteTime(&client.SetChatMessageAutoDeleteTimeRequest{
 			ChatId:                chatID,
-			Ttl:    int32(ttl),
+			MessageAutoDeleteTime: int32(ttl),
 		})
 
 		if err != nil {

telegram/connect.go

@@ -2,7 +2,7 @@ package telegram
 
 import (
 	"github.com/pkg/errors"
-	"strconv"
+	"time"
 
 	"dev.narayana.im/narayana/telegabber/xmpp/gateway"
 
@@ -13,7 +13,7 @@ import (
 const chatsLimit int32 = 999
 
 type clientAuthorizer struct {
-	TdlibParameters chan *client.TdlibParameters
+	TdlibParameters chan *client.SetTdlibParametersRequest
 	PhoneNumber     chan string
 	Code            chan string
 	State           chan client.AuthorizationState
@@ -31,13 +31,7 @@ func (stateHandler *clientAuthorizer) Handle(c *client.Client, state client.Auth
 
 	switch state.AuthorizationStateType() {
 	case client.TypeAuthorizationStateWaitTdlibParameters:
-		_, err := c.SetTdlibParameters(&client.SetTdlibParametersRequest{
-			Parameters: <-stateHandler.TdlibParameters,
-		})
-		return err
-
-	case client.TypeAuthorizationStateWaitEncryptionKey:
-		_, err := c.CheckDatabaseEncryptionKey(&client.CheckDatabaseEncryptionKeyRequest{})
+		_, err := c.SetTdlibParameters(<-stateHandler.TdlibParameters)
 		return err
 
 	case client.TypeAuthorizationStateWaitPhoneNumber:
@@ -74,10 +68,10 @@ func (stateHandler *clientAuthorizer) Handle(c *client.Client, state client.Auth
 		return nil
 
 	case client.TypeAuthorizationStateLoggingOut:
-		return client.ErrNotSupportedAuthorizationState
+		return nil
 
 	case client.TypeAuthorizationStateClosing:
-		return client.ErrNotSupportedAuthorizationState
+		return nil
 
 	case client.TypeAuthorizationStateClosed:
 		return client.ErrNotSupportedAuthorizationState
@@ -115,8 +109,9 @@ func (c *Client) Connect(resource string) error {
 
 	log.Warn("Connecting to Telegram network...")
 
+	c.locks.authorizerWriteLock.Lock()
 	c.authorizer = &clientAuthorizer{
-		TdlibParameters: make(chan *client.TdlibParameters, 1),
+		TdlibParameters: make(chan *client.SetTdlibParametersRequest, 1),
 		PhoneNumber:     make(chan string, 1),
 		Code:            make(chan string, 1),
 		State:           make(chan client.AuthorizationState, 10),
@@ -126,8 +121,10 @@ func (c *Client) Connect(resource string) error {
 	}
 
 	go c.interactor()
+	log.Warn("Interactor launched")
 
 	c.authorizer.TdlibParameters <- c.parameters
+	c.locks.authorizerWriteLock.Unlock()
 
 	tdlibClient, err := client.NewClient(c.authorizer, c.options...)
 	if err != nil {
@@ -160,14 +157,55 @@ func (c *Client) Connect(resource string) error {
 			log.Errorf("Could not retrieve chats: %v", err)
 		}
 
-		gateway.SendPresence(c.xmpp, c.jid, gateway.SPType("subscribe"))
-		gateway.SendPresence(c.xmpp, c.jid, gateway.SPType("subscribed"))
-		gateway.SendPresence(c.xmpp, c.jid, gateway.SPStatus("Logged in as: "+c.Session.Login))
+		gateway.SubscribeToTransport(c.xmpp, c.jid)
+		c.sendPresence(gateway.SPStatus("Logged in as: " + c.Session.Login))
 	}()
 
 	return nil
 }
 
+func (c *Client) TryLogin(resource string, login string) error {
+	wasSessionLoginEmpty := c.Session.Login == ""
+	c.Session.Login = login
+
+	if wasSessionLoginEmpty && c.authorizer == nil {
+		go func() {
+			err := c.Connect(resource)
+			if err != nil {
+				log.Error(errors.Wrap(err, "TDlib connection failure"))
+			}
+		}()
+		// a quirk for authorizer to become ready. If it's still not,
+		// nothing bad: just re-login again
+		time.Sleep(1e5)
+	}
+
+	c.locks.authorizerWriteLock.Lock()
+	defer c.locks.authorizerWriteLock.Unlock()
+
+	if c.authorizer == nil {
+		return errors.New(TelegramNotInitialized)
+	}
+
+	if c.authorizer.isClosed {
+		return errors.New(TelegramAuthDone)
+	}
+
+	return nil
+}
+
+func (c *Client) SetPhoneNumber(login string) error {
+	c.locks.authorizerWriteLock.Lock()
+	defer c.locks.authorizerWriteLock.Unlock()
+
+	if c.authorizer == nil || c.authorizer.isClosed {
+		return errors.New("Authorization not needed")
+	}
+
+	c.authorizer.PhoneNumber <- login
+	return nil
+}
+
 // Disconnect drops TDlib connection and
 // returns the flag indicating if disconnecting is permitted
 func (c *Client) Disconnect(resource string, quit bool) bool {
@@ -189,12 +227,8 @@ func (c *Client) Disconnect(resource string, quit bool) bool {
 
 	// we're offline (unsubscribe if logout)
 	for _, id := range c.cache.ChatsKeys() {
-		gateway.SendPresence(
-			c.xmpp,
-			c.jid,
-			gateway.SPFrom(strconv.FormatInt(id, 10)),
-			gateway.SPType("unavailable"),
-		)
+		args := gateway.SimplePresence(id, "unavailable")
+		c.sendPresence(args...)
 	}
 
 	c.close()
@@ -204,9 +238,16 @@ func (c *Client) Disconnect(resource string, quit bool) bool {
 
 func (c *Client) interactor() {
 	for {
+		c.locks.authorizerReadLock.Lock()
+		if c.authorizer == nil {
+			log.Warn("Authorizer is lost, halting the interactor")
+			c.locks.authorizerReadLock.Unlock()
+			return
+		}
 		state, ok := <-c.authorizer.State
 		if !ok {
 			log.Warn("Interactor is disconnected")
+			c.locks.authorizerReadLock.Unlock()
 			return
 		}
 
@@ -236,18 +277,27 @@ func (c *Client) interactor() {
 			log.Warn("Waiting for 2FA password...")
 			gateway.SendServiceMessage(c.jid, "Please, enter 2FA passphrase via /password 12345", c.xmpp)
 		}
+		c.locks.authorizerReadLock.Unlock()
 	}
 }
 
 func (c *Client) forceClose() {
+	c.locks.authorizerReadLock.Lock()
+	c.locks.authorizerWriteLock.Lock()
+	defer c.locks.authorizerReadLock.Unlock()
+	defer c.locks.authorizerWriteLock.Unlock()
+
 	c.online = false
 	c.authorizer = nil
 }
 
 func (c *Client) close() {
+	c.locks.authorizerWriteLock.Lock()
 	if c.authorizer != nil && !c.authorizer.isClosed {
 		c.authorizer.Close()
 	}
+	c.locks.authorizerWriteLock.Unlock()
+
 	if c.client != nil {
 		_, err := c.client.Close()
 		if err != nil {

telegram/formatter/formatter.go

@@ -8,15 +8,31 @@ import (
 	"github.com/zelenin/go-tdlib/client"
 )
 
-// Insertion is a piece of text in given position
-type Insertion struct {
+type insertionType int
+
+const (
+	insertionOpening insertionType = iota
+	insertionClosing
+	insertionUnpaired
+)
+
+type MarkupModeType int
+
+const (
+	MarkupModeXEP0393 MarkupModeType = iota
+	MarkupModeMarkdown
+)
+
+// insertion is a piece of text in given position
+type insertion struct {
 	Offset int32
 	Runes  []rune
+	Type   insertionType
 }
 
-// InsertionStack contains the sequence of insertions
+// insertionStack contains the sequence of insertions
 // from the start or from the end
-type InsertionStack []*Insertion
+type insertionStack []*insertion
 
 var boldRunesMarkdown = []rune("**")
 var boldRunesXEP0393 = []rune("*")
@@ -24,13 +40,18 @@ var italicRunes = []rune("_")
 var strikeRunesMarkdown = []rune("~~")
 var strikeRunesXEP0393 = []rune("~")
 var codeRunes = []rune("`")
-var preRuneStart = []rune("```\n")
-var preRuneEnd = []rune("\n```")
+var preRunesStart = []rune("```\n")
+var preRunesEnd = []rune("\n```")
+var quoteRunes = []rune("> ")
+var newlineRunes = []rune("\n")
+var doubleNewlineRunes = []rune("\n\n")
+var newlineCode = rune(0x0000000a)
+var bmpCeil = rune(0x0000ffff)
 
 // rebalance pumps all the values until the given offset to current stack (growing
 // from start) from given stack (growing from end); should be called
 // before any insertions to the current stack at the given offset
-func (s InsertionStack) rebalance(s2 InsertionStack, offset int32) (InsertionStack, InsertionStack) {
+func (s insertionStack) rebalance(s2 insertionStack, offset int32) (insertionStack, insertionStack) {
 	for len(s2) > 0 && s2[len(s2)-1].Offset <= offset {
 		s = append(s, s2[len(s2)-1])
 		s2 = s2[:len(s2)-1]
@@ -41,10 +62,10 @@ func (s InsertionStack) rebalance(s2 InsertionStack, offset int32) (InsertionSta
 
 // NewIterator is a second order function that sequentially scans and returns
 // stack elements; starts returning nil when elements are ended
-func (s InsertionStack) NewIterator() func() *Insertion {
+func (s insertionStack) NewIterator() func() *insertion {
 	i := -1
 
-	return func() *Insertion {
+	return func() *insertion {
 		i++
 		if i < len(s) {
 			return s[i]
@@ -120,21 +141,10 @@ func MergeAdjacentEntities(entities []*client.TextEntity) []*client.TextEntity {
 }
 
 // ClaspDirectives to the following span as required by XEP-0393
-func ClaspDirectives(text string, entities []*client.TextEntity) []*client.TextEntity {
+func ClaspDirectives(doubledRunes []rune, entities []*client.TextEntity) []*client.TextEntity {
 	alignedEntities := make([]*client.TextEntity, len(entities))
 	copy(alignedEntities, entities)
 
-	// transform the source text into a form with uniform runes and code points,
-	// by duplicating the Basic Multilingual Plane
-	doubledRunes := make([]rune, 0, len(text)*2)
-
-	for _, cp := range text {
-		if cp > 0x0000ffff {
-			doubledRunes = append(doubledRunes, cp, cp)
-		} else {
-			doubledRunes = append(doubledRunes, cp)
-		}
-	}
 	for i, entity := range alignedEntities {
 		var dirty bool
 		endOffset := entity.Offset + entity.Length
@@ -167,18 +177,89 @@ func ClaspDirectives(text string, entities []*client.TextEntity) []*client.TextE
 	return alignedEntities
 }
 
-func markupBraces(entity *client.TextEntity, lbrace, rbrace []rune) (*Insertion, *Insertion) {
-	return &Insertion{
+func markupBraces(entity *client.TextEntity, lbrace, rbrace []rune) []*insertion {
+	return []*insertion{
+		&insertion{
 			Offset: entity.Offset,
 			Runes:  lbrace,
-		}, &Insertion{
+			Type:   insertionOpening,
+		},
+		&insertion{
 			Offset: entity.Offset + entity.Length,
 			Runes:  rbrace,
+			Type:   insertionClosing,
+		},
 	}
 }
 
-// EntityToMarkdown generates the wrapping Markdown tags
-func EntityToMarkdown(entity *client.TextEntity) (*Insertion, *Insertion) {
+func quotePrependNewlines(entity *client.TextEntity, doubledRunes []rune, markupMode MarkupModeType) []*insertion {
+	if len(doubledRunes) == 0 {
+		return []*insertion{}
+	}
+
+	startRunes := []rune("\n> ")
+	if entity.Offset == 0 || doubledRunes[entity.Offset-1] == newlineCode {
+		startRunes = quoteRunes
+	}
+	insertions := []*insertion{
+		&insertion{
+			Offset: entity.Offset,
+			Runes:  startRunes,
+			Type:   insertionUnpaired,
+		},
+	}
+
+	entityEnd := entity.Offset + entity.Length
+	entityEndInt := int(entityEnd)
+
+	var wasNewline bool
+	// last newline is omitted, there's no need to put quote mark after the quote
+	for i := entity.Offset; i < entityEnd-1; i++ {
+		isNewline := doubledRunes[i] == newlineCode
+		if (isNewline && markupMode == MarkupModeXEP0393) || (wasNewline && isNewline && markupMode == MarkupModeMarkdown) {
+			insertions = append(insertions, &insertion{
+				Offset: i + 1,
+				Runes:  quoteRunes,
+				Type:   insertionUnpaired,
+			})
+		}
+
+		if isNewline {
+			wasNewline = true
+		} else {
+			wasNewline = false
+		}
+	}
+
+	var rbrace []rune
+	if len(doubledRunes) > entityEndInt {
+		if doubledRunes[entityEnd] == newlineCode {
+			if markupMode == MarkupModeMarkdown && len(doubledRunes) > entityEndInt+1 && doubledRunes[entityEndInt+1] != newlineCode {
+				rbrace = newlineRunes
+			}
+		} else {
+			if markupMode == MarkupModeMarkdown {
+				rbrace = doubleNewlineRunes
+			} else {
+				rbrace = newlineRunes
+			}
+		}
+	}
+	insertions = append(insertions, &insertion{
+		Offset: entityEnd,
+		Runes:  rbrace,
+		Type:   insertionClosing,
+	})
+
+	return insertions
+}
+
+// entityToMarkdown generates the wrapping Markdown tags
+func entityToMarkdown(entity *client.TextEntity, doubledRunes []rune, markupMode MarkupModeType) []*insertion {
+	if entity == nil || entity.Type == nil {
+		return []*insertion{}
+	}
+
 	switch entity.Type.TextEntityTypeType() {
 	case client.TypeTextEntityTypeBold:
 		return markupBraces(entity, boldRunesMarkdown, boldRunesMarkdown)
@@ -189,22 +270,24 @@ func EntityToMarkdown(entity *client.TextEntity) (*Insertion, *Insertion) {
 	case client.TypeTextEntityTypeCode:
 		return markupBraces(entity, codeRunes, codeRunes)
 	case client.TypeTextEntityTypePre:
-		return markupBraces(entity, preRuneStart, preRuneEnd)
+		return markupBraces(entity, preRunesStart, preRunesEnd)
 	case client.TypeTextEntityTypePreCode:
 		preCode, _ := entity.Type.(*client.TextEntityTypePreCode)
-		return markupBraces(entity, []rune("\n```"+preCode.Language+"\n"), codeRunes)
+		return markupBraces(entity, []rune("\n```"+preCode.Language+"\n"), preRunesEnd)
+	case client.TypeTextEntityTypeBlockQuote:
+		return quotePrependNewlines(entity, doubledRunes, MarkupModeMarkdown)
 	case client.TypeTextEntityTypeTextUrl:
 		textURL, _ := entity.Type.(*client.TextEntityTypeTextUrl)
 		return markupBraces(entity, []rune("["), []rune("]("+textURL.Url+")"))
 	}
 
-	return nil, nil
+	return []*insertion{}
 }
 
-// EntityToXEP0393 generates the wrapping XEP-0393 tags
-func EntityToXEP0393(entity *client.TextEntity) (*Insertion, *Insertion) {
+// entityToXEP0393 generates the wrapping XEP-0393 tags
+func entityToXEP0393(entity *client.TextEntity, doubledRunes []rune, markupMode MarkupModeType) []*insertion {
 	if entity == nil || entity.Type == nil {
-		return nil, nil
+		return []*insertion{}
 	}
 
 	switch entity.Type.TextEntityTypeType() {
@@ -217,33 +300,59 @@ func EntityToXEP0393(entity *client.TextEntity) (*Insertion, *Insertion) {
 	case client.TypeTextEntityTypeCode:
 		return markupBraces(entity, codeRunes, codeRunes)
 	case client.TypeTextEntityTypePre:
-		return markupBraces(entity, preRuneStart, preRuneEnd)
+		return markupBraces(entity, preRunesStart, preRunesEnd)
 	case client.TypeTextEntityTypePreCode:
 		preCode, _ := entity.Type.(*client.TextEntityTypePreCode)
-		return markupBraces(entity, []rune("\n```"+preCode.Language+"\n"), codeRunes)
+		return markupBraces(entity, []rune("\n```"+preCode.Language+"\n"), preRunesEnd)
+	case client.TypeTextEntityTypeBlockQuote:
+		return quotePrependNewlines(entity, doubledRunes, MarkupModeXEP0393)
 	case client.TypeTextEntityTypeTextUrl:
 		textURL, _ := entity.Type.(*client.TextEntityTypeTextUrl)
 		// non-standard, Pidgin-specific
 		return markupBraces(entity, []rune{}, []rune(" <"+textURL.Url+">"))
 	}
 
-	return nil, nil
+	return []*insertion{}
+}
+
+// transform the source text into a form with uniform runes and code points,
+// by duplicating anything beyond the Basic Multilingual Plane
+func textToDoubledRunes(text string) []rune {
+	doubledRunes := make([]rune, 0, len(text)*2)
+	for _, cp := range text {
+		if cp > bmpCeil {
+			doubledRunes = append(doubledRunes, cp, cp)
+		} else {
+			doubledRunes = append(doubledRunes, cp)
+		}
+	}
+
+	return doubledRunes
 }
 
 // Format traverses an already sorted list of entities and wraps the text in a markup
 func Format(
 	sourceText string,
 	entities []*client.TextEntity,
-	entityToMarkup func(*client.TextEntity) (*Insertion, *Insertion),
+	markupMode MarkupModeType,
 ) string {
 	if len(entities) == 0 {
 		return sourceText
 	}
 
-	mergedEntities := SortEntities(ClaspDirectives(sourceText, MergeAdjacentEntities(SortEntities(entities))))
+	var entityToMarkup func(*client.TextEntity, []rune, MarkupModeType) []*insertion
+	if markupMode == MarkupModeXEP0393 {
+		entityToMarkup = entityToXEP0393
+	} else {
+		entityToMarkup = entityToMarkdown
+	}
 
-	startStack := make(InsertionStack, 0, len(sourceText))
-	endStack := make(InsertionStack, 0, len(sourceText))
+	doubledRunes := textToDoubledRunes(sourceText)
+
+	mergedEntities := SortEntities(ClaspDirectives(doubledRunes, MergeAdjacentEntities(SortEntities(entities))))
+
+	startStack := make(insertionStack, 0, len(sourceText))
+	endStack := make(insertionStack, 0, len(sourceText))
 
 	// convert entities to a stack of brackets
 	var maxEndOffset int32
@@ -260,36 +369,70 @@ func Format(
 
 		startStack, endStack = startStack.rebalance(endStack, entity.Offset)
 
-		startInsertion, endInsertion := entityToMarkup(entity)
-		if startInsertion != nil {
-			startStack = append(startStack, startInsertion)
+		insertions := entityToMarkup(entity, doubledRunes, markupMode)
+		if len(insertions) > 1 {
+			startStack = append(startStack, insertions[0:len(insertions)-1]...)
 		}
-		if endInsertion != nil {
-			endStack = append(endStack, endInsertion)
+		if len(insertions) > 0 {
+			endStack = append(endStack, insertions[len(insertions)-1])
 		}
 	}
 	// flush the closing brackets that still remain in endStack
 	startStack, endStack = startStack.rebalance(endStack, maxEndOffset)
+	// sort unpaired insertions
+	sort.SliceStable(startStack, func(i int, j int) bool {
+		ins1 := startStack[i]
+		ins2 := startStack[j]
+		if ins1.Type == insertionUnpaired && ins2.Type == insertionUnpaired {
+			return ins1.Offset < ins2.Offset
+		}
+		if ins1.Type == insertionUnpaired {
+			if ins1.Offset == ins2.Offset {
+				if ins2.Type == insertionOpening { // > **
+					return true
+				} else if ins2.Type == insertionClosing { // **>
+					return false
+				}
+			} else {
+				return ins1.Offset < ins2.Offset
+			}
+		}
+		if ins2.Type == insertionUnpaired {
+			if ins1.Offset == ins2.Offset {
+				if ins1.Type == insertionOpening { // > **
+					return false
+				} else if ins1.Type == insertionClosing { // **>
+					return true
+				}
+			} else {
+				return ins1.Offset < ins2.Offset
+			}
+		}
+		return false
+	})
 
 	// merge brackets into text
 	markupRunes := make([]rune, 0, len(sourceText))
 
 	nextInsertion := startStack.NewIterator()
 	insertion := nextInsertion()
-	var runeI int32
+	var skipNext bool
 
-	for _, cp := range sourceText {
-		for insertion != nil && insertion.Offset <= runeI {
+	for i, cp := range doubledRunes {
+		if skipNext {
+			skipNext = false
+			continue
+		}
+
+		for insertion != nil && int(insertion.Offset) <= i {
 			markupRunes = append(markupRunes, insertion.Runes...)
 			insertion = nextInsertion()
 		}
 
 		markupRunes = append(markupRunes, cp)
 		// skip two UTF-16 code units (not points actually!) if needed
-		if cp > 0x0000ffff {
-			runeI += 2
-		} else {
-			runeI++
+		if cp > bmpCeil {
+			skipNext = true
 		}
 	}
 	for insertion != nil {

telegram/formatter/formatter_test.go

@@ -7,7 +7,7 @@ import (
 )
 
 func TestNoFormatting(t *testing.T) {
-	markup := Format("abc\ndef", []*client.TextEntity{}, EntityToMarkdown)
+	markup := Format("abc\ndef", []*client.TextEntity{}, MarkupModeMarkdown)
 	if markup != "abc\ndef" {
 		t.Errorf("No formatting expected, but: %v", markup)
 	}
@@ -20,7 +20,7 @@ func TestFormattingSimple(t *testing.T) {
 			Length: 4,
 			Type:   &client.TextEntityTypeBold{},
 		},
-	}, EntityToMarkdown)
+	}, MarkupModeMarkdown)
 	if markup != "👙**🐧🐖**" {
 		t.Errorf("Wrong simple formatting: %v", markup)
 	}
@@ -40,7 +40,7 @@ func TestFormattingAdjacent(t *testing.T) {
 				Url: "https://narayana.im/",
 			},
 		},
-	}, EntityToMarkdown)
+	}, MarkupModeMarkdown)
 	if markup != "a👙_🐧_[🐖](https://narayana.im/)" {
 		t.Errorf("Wrong adjacent formatting: %v", markup)
 	}
@@ -63,18 +63,18 @@ func TestFormattingAdjacentAndNested(t *testing.T) {
 			Length: 2,
 			Type:   &client.TextEntityTypeItalic{},
 		},
-	}, EntityToMarkdown)
+	}, MarkupModeMarkdown)
 	if markup != "```\n**👙**🐧\n```_🐖_" {
 		t.Errorf("Wrong adjacent&nested formatting: %v", markup)
 	}
 }
 
 func TestRebalanceTwoZero(t *testing.T) {
-	s1 := InsertionStack{
-		&Insertion{Offset: 7},
-		&Insertion{Offset: 8},
+	s1 := insertionStack{
+		&insertion{Offset: 7},
+		&insertion{Offset: 8},
 	}
-	s2 := InsertionStack{}
+	s2 := insertionStack{}
 	s1, s2 = s1.rebalance(s2, 7)
 	if !(len(s1) == 2 && len(s2) == 0 && s1[0].Offset == 7 && s1[1].Offset == 8) {
 		t.Errorf("Wrong rebalance 2–0: %#v %#v", s1, s2)
@@ -82,13 +82,13 @@ func TestRebalanceTwoZero(t *testing.T) {
 }
 
 func TestRebalanceNeeded(t *testing.T) {
-	s1 := InsertionStack{
-		&Insertion{Offset: 7},
-		&Insertion{Offset: 8},
+	s1 := insertionStack{
+		&insertion{Offset: 7},
+		&insertion{Offset: 8},
 	}
-	s2 := InsertionStack{
-		&Insertion{Offset: 10},
-		&Insertion{Offset: 9},
+	s2 := insertionStack{
+		&insertion{Offset: 10},
+		&insertion{Offset: 9},
 	}
 	s1, s2 = s1.rebalance(s2, 9)
 	if !(len(s1) == 3 && len(s2) == 1 &&
@@ -99,13 +99,13 @@ func TestRebalanceNeeded(t *testing.T) {
 }
 
 func TestRebalanceNotNeeded(t *testing.T) {
-	s1 := InsertionStack{
-		&Insertion{Offset: 7},
-		&Insertion{Offset: 8},
+	s1 := insertionStack{
+		&insertion{Offset: 7},
+		&insertion{Offset: 8},
 	}
-	s2 := InsertionStack{
-		&Insertion{Offset: 10},
-		&Insertion{Offset: 9},
+	s2 := insertionStack{
+		&insertion{Offset: 10},
+		&insertion{Offset: 9},
 	}
 	s1, s2 = s1.rebalance(s2, 8)
 	if !(len(s1) == 2 && len(s2) == 2 &&
@@ -116,13 +116,13 @@ func TestRebalanceNotNeeded(t *testing.T) {
 }
 
 func TestRebalanceLate(t *testing.T) {
-	s1 := InsertionStack{
-		&Insertion{Offset: 7},
-		&Insertion{Offset: 8},
+	s1 := insertionStack{
+		&insertion{Offset: 7},
+		&insertion{Offset: 8},
 	}
-	s2 := InsertionStack{
-		&Insertion{Offset: 10},
-		&Insertion{Offset: 9},
+	s2 := insertionStack{
+		&insertion{Offset: 10},
+		&insertion{Offset: 9},
 	}
 	s1, s2 = s1.rebalance(s2, 10)
 	if !(len(s1) == 4 && len(s2) == 0 &&
@@ -133,7 +133,7 @@ func TestRebalanceLate(t *testing.T) {
 }
 
 func TestIteratorEmpty(t *testing.T) {
-	s := InsertionStack{}
+	s := insertionStack{}
 	g := s.NewIterator()
 	v := g()
 	if v != nil {
@@ -142,9 +142,9 @@ func TestIteratorEmpty(t *testing.T) {
 }
 
 func TestIterator(t *testing.T) {
-	s := InsertionStack{
-		&Insertion{Offset: 7},
-		&Insertion{Offset: 8},
+	s := insertionStack{
+		&insertion{Offset: 7},
+		&insertion{Offset: 8},
 	}
 	g := s.NewIterator()
 	v := g()
@@ -208,7 +208,7 @@ func TestSortEmpty(t *testing.T) {
 }
 
 func TestNoFormattingXEP0393(t *testing.T) {
-	markup := Format("abc\ndef", []*client.TextEntity{}, EntityToXEP0393)
+	markup := Format("abc\ndef", []*client.TextEntity{}, MarkupModeXEP0393)
 	if markup != "abc\ndef" {
 		t.Errorf("No formatting expected, but: %v", markup)
 	}
@@ -221,7 +221,7 @@ func TestFormattingXEP0393Simple(t *testing.T) {
 			Length: 4,
 			Type:   &client.TextEntityTypeBold{},
 		},
-	}, EntityToXEP0393)
+	}, MarkupModeXEP0393)
 	if markup != "👙*🐧🐖*" {
 		t.Errorf("Wrong simple formatting: %v", markup)
 	}
@@ -241,7 +241,7 @@ func TestFormattingXEP0393Adjacent(t *testing.T) {
 				Url: "https://narayana.im/",
 			},
 		},
-	}, EntityToXEP0393)
+	}, MarkupModeXEP0393)
 	if markup != "a👙_🐧_🐖 <https://narayana.im/>" {
 		t.Errorf("Wrong adjacent formatting: %v", markup)
 	}
@@ -264,7 +264,7 @@ func TestFormattingXEP0393AdjacentAndNested(t *testing.T) {
 			Length: 2,
 			Type:   &client.TextEntityTypeItalic{},
 		},
-	}, EntityToXEP0393)
+	}, MarkupModeXEP0393)
 	if markup != "```\n*👙*🐧\n```_🐖_" {
 		t.Errorf("Wrong adjacent&nested formatting: %v", markup)
 	}
@@ -287,7 +287,7 @@ func TestFormattingXEP0393AdjacentItalicBoldItalic(t *testing.T) {
 			Length: 69,
 			Type:   &client.TextEntityTypeItalic{},
 		},
-	}, EntityToXEP0393)
+	}, MarkupModeXEP0393)
 	if markup != "_раса двуногих крысолюдей, *которую так редко замечают, что многие отрицают само их существование*_" {
 		t.Errorf("Wrong adjacent italic/bold-italic formatting: %v", markup)
 	}
@@ -315,7 +315,7 @@ func TestFormattingXEP0393MultipleAdjacent(t *testing.T) {
 			Length: 1,
 			Type:   &client.TextEntityTypeItalic{},
 		},
-	}, EntityToXEP0393)
+	}, MarkupModeXEP0393)
 	if markup != "a*bcd*_e_" {
 		t.Errorf("Wrong multiple adjacent formatting: %v", markup)
 	}
@@ -343,7 +343,7 @@ func TestFormattingXEP0393Intersecting(t *testing.T) {
 			Length: 1,
 			Type:   &client.TextEntityTypeBold{},
 		},
-	}, EntityToXEP0393)
+	}, MarkupModeXEP0393)
 	if markup != "a*b*_*cd*e_" {
 		t.Errorf("Wrong intersecting formatting: %v", markup)
 	}
@@ -361,7 +361,7 @@ func TestFormattingXEP0393InlineCode(t *testing.T) {
 			Length: 25,
 			Type:   &client.TextEntityTypePre{},
 		},
-	}, EntityToXEP0393)
+	}, MarkupModeXEP0393)
 	if markup != "Is `Gajim` a thing?\n\n```\necho 'Hello'\necho 'world'\n```\n\nhruck(" {
 		t.Errorf("Wrong intersecting formatting: %v", markup)
 	}
@@ -374,7 +374,7 @@ func TestFormattingMarkdownStrikethrough(t *testing.T) {
 			Length: 3,
 			Type:   &client.TextEntityTypeStrikethrough{},
 		},
-	}, EntityToMarkdown)
+	}, MarkupModeMarkdown)
 	if markup != "Everyone ~~dis~~likes cake." {
 		t.Errorf("Wrong strikethrough formatting: %v", markup)
 	}
@@ -387,14 +387,14 @@ func TestFormattingXEP0393Strikethrough(t *testing.T) {
 			Length: 3,
 			Type:   &client.TextEntityTypeStrikethrough{},
 		},
-	}, EntityToXEP0393)
+	}, MarkupModeXEP0393)
 	if markup != "Everyone ~dis~likes cake." {
 		t.Errorf("Wrong strikethrough formatting: %v", markup)
 	}
 }
 
 func TestClaspLeft(t *testing.T) {
-	text := "a b c"
+	text := textToDoubledRunes("a b c")
 	entities := []*client.TextEntity{
 		&client.TextEntity{
 			Offset: 1,
@@ -409,7 +409,7 @@ func TestClaspLeft(t *testing.T) {
 }
 
 func TestClaspBoth(t *testing.T) {
-	text := "a b c"
+	text := textToDoubledRunes("a b c")
 	entities := []*client.TextEntity{
 		&client.TextEntity{
 			Offset: 1,
@@ -424,7 +424,7 @@ func TestClaspBoth(t *testing.T) {
 }
 
 func TestClaspNotNeeded(t *testing.T) {
-	text := " abc "
+	text := textToDoubledRunes(" abc ")
 	entities := []*client.TextEntity{
 		&client.TextEntity{
 			Offset: 1,
@@ -439,7 +439,7 @@ func TestClaspNotNeeded(t *testing.T) {
 }
 
 func TestClaspNested(t *testing.T) {
-	text := "a b c"
+	text := textToDoubledRunes("a b c")
 	entities := []*client.TextEntity{
 		&client.TextEntity{
 			Offset: 1,
@@ -459,7 +459,7 @@ func TestClaspNested(t *testing.T) {
 }
 
 func TestClaspEmoji(t *testing.T) {
-	text := "a 🐖 c"
+	text := textToDoubledRunes("a 🐖 c")
 	entities := []*client.TextEntity{
 		&client.TextEntity{
 			Offset: 1,
@@ -472,3 +472,111 @@ func TestClaspEmoji(t *testing.T) {
 		t.Errorf("Wrong claspemoji: %#v", entities)
 	}
 }
+
+func TestNoNewlineBlockquoteXEP0393(t *testing.T) {
+	markup := Format("yes it can i think", []*client.TextEntity{
+		&client.TextEntity{
+			Offset: 4,
+			Length: 6,
+			Type:   &client.TextEntityTypeBlockQuote{},
+		},
+	}, MarkupModeXEP0393)
+	if markup != "yes \n> it can\n i think" {
+		t.Errorf("Wrong blockquote formatting: %v", markup)
+	}
+}
+
+func TestNoNewlineBlockquoteMarkdown(t *testing.T) {
+	markup := Format("yes it can i think", []*client.TextEntity{
+		&client.TextEntity{
+			Offset: 4,
+			Length: 6,
+			Type:   &client.TextEntityTypeBlockQuote{},
+		},
+	}, MarkupModeMarkdown)
+	if markup != "yes \n> it can\n\n i think" {
+		t.Errorf("Wrong blockquote formatting: %v", markup)
+	}
+}
+
+func TestMultilineBlockquoteXEP0393(t *testing.T) {
+	markup := Format("hruck\npuck\n\nshuck\ntext", []*client.TextEntity{
+		&client.TextEntity{
+			Offset: 0,
+			Length: 17,
+			Type:   &client.TextEntityTypeBlockQuote{},
+		},
+	}, MarkupModeXEP0393)
+	if markup != "> hruck\n> puck\n> \n> shuck\ntext" {
+		t.Errorf("Wrong blockquote formatting: %v", markup)
+	}
+}
+
+func TestMultilineBlockquoteMarkdown(t *testing.T) {
+	markup := Format("hruck\npuck\n\nshuck\ntext", []*client.TextEntity{
+		&client.TextEntity{
+			Offset: 0,
+			Length: 17,
+			Type:   &client.TextEntityTypeBlockQuote{},
+		},
+	}, MarkupModeMarkdown)
+	if markup != "> hruck\npuck\n\n> shuck\n\ntext" {
+		t.Errorf("Wrong blockquote formatting: %v", markup)
+	}
+}
+
+func TestMixedBlockquoteXEP0393(t *testing.T) {
+	markup := Format("hruck\npuck\nshuck\ntext", []*client.TextEntity{
+		&client.TextEntity{
+			Offset: 0,
+			Length: 16,
+			Type:   &client.TextEntityTypeBlockQuote{},
+		},
+		&client.TextEntity{
+			Offset: 0,
+			Length: 16,
+			Type:   &client.TextEntityTypeBold{},
+		},
+		&client.TextEntity{
+			Offset: 0,
+			Length: 10,
+			Type:   &client.TextEntityTypeItalic{},
+		},
+		&client.TextEntity{
+			Offset: 7,
+			Length: 2,
+			Type:   &client.TextEntityTypeStrikethrough{},
+		},
+	}, MarkupModeXEP0393)
+	if markup != "> *_hruck\n> p~uc~k_\n> shuck*\ntext" {
+		t.Errorf("Wrong blockquote formatting: %v", markup)
+	}
+}
+
+func TestMixedBlockquoteMarkdown(t *testing.T) {
+	markup := Format("hruck\npuck\nshuck\ntext", []*client.TextEntity{
+		&client.TextEntity{
+			Offset: 0,
+			Length: 16,
+			Type:   &client.TextEntityTypeBlockQuote{},
+		},
+		&client.TextEntity{
+			Offset: 0,
+			Length: 16,
+			Type:   &client.TextEntityTypeBold{},
+		},
+		&client.TextEntity{
+			Offset: 0,
+			Length: 10,
+			Type:   &client.TextEntityTypeItalic{},
+		},
+		&client.TextEntity{
+			Offset: 7,
+			Length: 2,
+			Type:   &client.TextEntityTypeStrikethrough{},
+		},
+	}, MarkupModeMarkdown)
+	if markup != "> **_hruck\np~~uc~~k_\nshuck**\n\ntext" {
+		t.Errorf("Wrong blockquote formatting: %v", markup)
+	}
+}

telegram/handlers.go

@@ -55,6 +55,31 @@ func (c *Client) cleanTempFile(path string) {
 	}
 }
 
+func (c *Client) sendMarker(chatId, messageId int64, typ gateway.MarkerType) {
+	xmppId, err := gateway.IdsDB.GetByTgIds(c.Session.Login, c.jid, chatId, messageId)
+	if err != nil {
+		xmppId = strconv.FormatInt(messageId, 10)
+	}
+
+	var stringType string
+	if typ == gateway.MarkerTypeReceived {
+		stringType = "received"
+	} else if typ == gateway.MarkerTypeDisplayed {
+		stringType = "displayed"
+	}
+	log.WithFields(log.Fields{
+		"xmppId": xmppId,
+	}).Debugf("marker: %s", stringType)
+
+	gateway.SendMessageMarker(
+		c.jid,
+		strconv.FormatInt(chatId, 10),
+		c.xmpp,
+		typ,
+		xmppId,
+	)
+}
+
 func (c *Client) updateHandler() {
 	listener := c.client.GetListener()
 	defer listener.Close()
@@ -141,6 +166,12 @@ func (c *Client) updateHandler() {
 					uhOh()
 				}
 				c.updateChatTitle(typedUpdate)
+			case client.TypeUpdateChatReadOutbox:
+				typedUpdate, ok := update.(*client.UpdateChatReadOutbox)
+				if !ok {
+					uhOh()
+				}
+				c.updateChatReadOutbox(typedUpdate)
 			default:
 				// log only handled types
 				continue
@@ -203,14 +234,19 @@ func (c *Client) updateChatLastMessage(update *client.UpdateChatLastMessage) {
 
 // message received
 func (c *Client) updateNewMessage(update *client.UpdateNewMessage) {
-	go func() {
 	chatId := update.Message.ChatId
+	if c.Session.IsChatIgnored(chatId) {
+		return
+	}
 
 	// guarantee sequential message delivering per chat
 	lock := c.getChatMessageLock(chatId)
+	go func() {
 		lock.Lock()
 		defer lock.Unlock()
 
+		c.updateLastMessageHash(update.Message.ChatId, update.Message.Id, update.Message.Content)
+
 		// ignore self outgoing messages
 		if update.Message.IsOutgoing &&
 			update.Message.SendingState != nil &&
@@ -228,27 +264,106 @@ func (c *Client) updateNewMessage(update *client.UpdateNewMessage) {
 
 // message content updated
 func (c *Client) updateMessageContent(update *client.UpdateMessageContent) {
-	markupFunction := formatter.EntityToXEP0393
-	if update.NewContent.MessageContentType() == client.TypeMessageText {
+	if c.Session.IsChatIgnored(update.ChatId) {
+		return
+	}
+
+	markupFunction := c.getFormatter()
+
+	defer c.updateLastMessageHash(update.ChatId, update.MessageId, update.NewContent)
+
+	log.Debugf("newContent: %#v", update.NewContent)
+
+	lock := c.getChatMessageLock(update.ChatId)
+	lock.Lock()
+	lock.Unlock()
+	c.SendMessageLock.Lock()
+	c.SendMessageLock.Unlock()
+
+	xmppId, xmppIdErr := gateway.IdsDB.GetByTgIds(c.Session.Login, c.jid, update.ChatId, update.MessageId)
+	var ignoredResource string
+	if xmppIdErr == nil {
+		ignoredResource = c.popFromEditOutbox(xmppId)
+	} else {
+		log.Infof("Couldn't retrieve XMPP message ids for %v, an echo may happen", update.MessageId)
+	}
+	log.Infof("ignoredResource: %v", ignoredResource)
+
+	jids := c.getCarbonFullJids(true, ignoredResource)
+	if len(jids) == 0 {
+		log.Info("The only resource is ignored, aborting")
+		return
+	}
+
+	if update.NewContent.MessageContentType() == client.TypeMessageText && c.hasLastMessageHashChanged(update.ChatId, update.MessageId, update.NewContent) {
 		textContent := update.NewContent.(*client.MessageText)
+		log.Debugf("textContent: %#v", textContent.Text)
+
+		var replaceId string
+		sId := strconv.FormatInt(update.MessageId, 10)
+		var isCarbon bool
+
+		// use XEP-0308 edits only if the last message is edited for sure, fallback otherwise
+		if c.Session.NativeEdits {
+			lastXmppId, ok := c.getLastChatMessageId(update.ChatId)
+			if xmppIdErr != nil {
+				xmppId = sId
+			}
+			if ok && lastXmppId == xmppId {
+				replaceId = xmppId
+			} else {
+				log.Infof("Mismatching message ids: %v %v, falling back to separate edit message", lastXmppId, xmppId)
+			}
+		}
+
+		message, messageErr := c.client.GetMessage(&client.GetMessageRequest{
+			ChatId:    update.ChatId,
+			MessageId: update.MessageId,
+		})
+		var prefix string
+		if messageErr == nil {
+			isCarbon = c.isCarbonsEnabled() && message.IsOutgoing
+			// reply correction support in clients is suboptimal yet, so cut them out for now
+			prefix, _ = c.messageToPrefix(message, "", "", true)
+		} else {
+			log.Errorf("No message %v/%v found, cannot reliably determine if it's a carbon", update.ChatId, update.MessageId)
+		}
+
+		var text strings.Builder
+
+		if replaceId == "" {
 			var editChar string
 			if c.Session.AsciiArrows {
 				editChar = "e"
 			} else {
 				editChar = "✎"
 			}
-		text := editChar + fmt.Sprintf("%v | %s", update.MessageId, formatter.Format(
+			text.WriteString(fmt.Sprintf("%s %v | ", editChar, update.MessageId))
+		} else if prefix != "" {
+			text.WriteString(prefix)
+			text.WriteString(c.getPrefixSeparator(update.ChatId))
+		}
+
+		text.WriteString(formatter.Format(
 			textContent.Text.Text,
 			textContent.Text.Entities,
 			markupFunction,
 		))
-		gateway.SendMessage(c.jid, strconv.FormatInt(update.ChatId, 10), text, "e"+strconv.FormatInt(update.MessageId, 10), c.xmpp, nil, false, "")
+
+		sChatId := strconv.FormatInt(update.ChatId, 10)
+		for _, jid := range jids {
+			gateway.SendMessage(jid, sChatId, text.String(), "e"+sId, c.xmpp, nil, replaceId, isCarbon, false)
+		}
 	}
 }
 
 // message(s) deleted
 func (c *Client) updateDeleteMessages(update *client.UpdateDeleteMessages) {
 	if update.IsPermanent {
+		if c.Session.IsChatIgnored(update.ChatId) {
+			return
+		}
+
 		var deleteChar string
 		if c.Session.AsciiArrows {
 			deleteChar = "X "
@@ -270,19 +385,25 @@ func (c *Client) updateAuthorizationState(update *client.UpdateAuthorizationStat
 	}
 }
 
-// clean uploaded files
 func (c *Client) updateMessageSendSucceeded(update *client.UpdateMessageSendSucceeded) {
+	// replace message ID in local database
 	log.Debugf("replace message %v with %v", update.OldMessageId, update.Message.Id)
 	if err := gateway.IdsDB.ReplaceTgId(c.Session.Login, c.jid, update.Message.ChatId, update.OldMessageId, update.Message.Id); err != nil {
 		log.Errorf("failed to replace %v with %v: %v", update.OldMessageId, update.Message.Id, err.Error())
 	}
 
+	c.updateLastMessageHash(update.Message.ChatId, update.Message.Id, update.Message.Content)
+
+	c.sendMarker(update.Message.ChatId, update.Message.Id, gateway.MarkerTypeReceived)
+
+	// clean uploaded files
 	file, _ := c.contentToFile(update.Message.Content)
 	if file != nil && file.Local != nil {
 		c.cleanTempFile(file.Local.Path)
 	}
 }
 func (c *Client) updateMessageSendFailed(update *client.UpdateMessageSendFailed) {
+	// clean uploaded files
 	file, _ := c.contentToFile(update.Message.Content)
 	if file != nil && file.Local != nil {
 		c.cleanTempFile(file.Local.Path)
@@ -294,8 +415,17 @@ func (c *Client) updateChatTitle(update *client.UpdateChatTitle) {
 	gateway.SetNickname(c.jid, strconv.FormatInt(update.ChatId, 10), update.Title, c.xmpp)
 
 	// set also the status (for group chats only)
-	_, user, _ := c.GetContactByID(update.ChatId, nil)
+	chat, user, _ := c.GetContactByID(update.ChatId, nil)
 	if user == nil {
 		c.ProcessStatusUpdate(update.ChatId, update.Title, "chat", gateway.SPImmed(true))
 	}
+
+	// update chat title in the cache
+	if chat != nil {
+		chat.Title = update.Title
+	}
+}
+
+func (c *Client) updateChatReadOutbox(update *client.UpdateChatReadOutbox) {
+	c.sendMarker(update.ChatId, update.LastReadOutboxMessageId, gateway.MarkerTypeDisplayed)
 }

telegram/utils.go

@@ -2,8 +2,10 @@ package telegram
 
 import (
 	"crypto/sha1"
+	"encoding/binary"
 	"fmt"
 	"github.com/pkg/errors"
+	"hash/maphash"
 	"io"
 	"io/ioutil"
 	"net/http"
@@ -14,6 +16,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unicode/utf8"
 
 	"dev.narayana.im/narayana/telegabber/telegram/cache"
 	"dev.narayana.im/narayana/telegabber/telegram/formatter"
@@ -27,20 +30,28 @@ import (
 type VCardInfo struct {
 	Fn        string
 	Photo     *client.File
-	Nickname string
+	Nicknames []string
 	Given     string
 	Family    string
 	Tel       string
 	Info      string
 }
 
+type messageStub struct {
+	MessageId int64
+	ChatId    int64
+	Sender    string
+	Date      int32
+	Text      string
+}
+
 var errOffline = errors.New("TDlib instance is offline")
 
 var spaceRegex = regexp.MustCompile(`\s+`)
 var replyRegex = regexp.MustCompile("\\A>>? ?([0-9]+)\\n")
 
 const newlineChar string = "\n"
-const messageHeaderSeparator string = " | "
+const messageHeaderSeparator string = " | " // no hrunicode allowed here yet
 
 // GetContactByUsername resolves username to user id retrieves user and chat information
 func (c *Client) GetContactByUsername(username string) (*client.Chat, *client.User, error) {
@@ -241,33 +252,46 @@ func (c *Client) ProcessStatusUpdate(chatID int64, status string, show string, o
 	cachedStatus, ok := c.cache.GetStatus(chatID)
 	if status == "" {
 		if ok {
-			show, status = cachedStatus.XMPP, cachedStatus.Description
+			var typ string
+			show, status, typ = cachedStatus.Destruct()
+			if presenceType == "" {
+				presenceType = typ
+			}
+			log.WithFields(log.Fields{
+				"show":         show,
+				"status":       status,
+				"presenceType": presenceType,
+			}).Debug("Cached status")
 		} else if user != nil && user.Status != nil {
 			show, status, presenceType = c.userStatusToText(user.Status, chatID)
+			log.WithFields(log.Fields{
+				"show":         show,
+				"status":       status,
+				"presenceType": presenceType,
+			}).Debug("Status to text")
 		} else {
 			show, status = "chat", chat.Title
 		}
 	}
 
-	c.cache.SetStatus(chatID, show, status)
+	cacheShow := show
+	if presenceType == "unavailable" {
+		cacheShow = presenceType
+	}
+	c.cache.SetStatus(chatID, cacheShow, status)
 
 	newArgs := []args.V{
-		gateway.SPFrom(strconv.FormatInt(chatID, 10)),
 		gateway.SPShow(show),
 		gateway.SPStatus(status),
 		gateway.SPPhoto(photo),
-		gateway.SPResource(gateway.Jid.Resource),
 		gateway.SPImmed(gateway.SPImmed.Get(oldArgs)),
 	}
+	newArgs = gateway.SPAppendFrom(newArgs, chatID)
 	if presenceType != "" {
 		newArgs = append(newArgs, gateway.SPType(presenceType))
 	}
 
-	return gateway.SendPresence(
-		c.xmpp,
-		c.jid,
-		newArgs...,
-	)
+	return c.sendPresence(newArgs...)
 }
 
 func (c *Client) formatContact(chatID int64) string {
@@ -284,12 +308,15 @@ func (c *Client) formatContact(chatID int64) string {
 	if chat != nil {
 		str = fmt.Sprintf("%s (%v)", chat.Title, chat.Id)
 	} else if user != nil {
-		username := user.Username
-		if username == "" {
-			username = strconv.FormatInt(user.Id, 10)
+		var usernames string
+		if user.Usernames != nil {
+			usernames = c.usernamesToString(user.Usernames.ActiveUsernames)
+		}
+		if usernames == "" {
+			usernames = strconv.FormatInt(user.Id, 10)
 		}
 
-		str = fmt.Sprintf("%s %s (%v)", user.FirstName, user.LastName, username)
+		str = fmt.Sprintf("%s %s (%v)", user.FirstName, user.LastName, usernames)
 	} else {
 		str = strconv.FormatInt(chatID, 10)
 	}
@@ -318,26 +345,75 @@ func (c *Client) formatSender(message *client.Message) string {
 	return c.formatContact(c.getSenderId(message))
 }
 
-func (c *Client) getMessageReply(message *client.Message) (reply *gateway.Reply, replyMsg *client.Message) {
-	if message.ReplyToMessageId != 0 {
-		var err error
-		replyMsg, err = c.client.GetMessage(&client.GetMessageRequest{
+func (c *Client) messageToStub(message *client.Message, preview bool, text string) *messageStub {
+	if text == "" {
+		text = c.messageContentToText(message.Content, message.ChatId, preview)
+	}
+	return &messageStub{
+		MessageId: message.Id,
 		ChatId:    message.ChatId,
-			MessageId: message.ReplyToMessageId,
+		Sender:    c.formatSender(message),
+		Date:      message.Date,
+		Text:      text,
+	}
+}
+
+func (c *Client) getMessageReply(message *client.Message, preview bool, noContent bool) (gatewayReply *gateway.Reply, tgReply *messageStub) {
+	if message.ReplyTo != nil && message.ReplyTo.MessageReplyToType() == client.TypeMessageReplyToMessage {
+		replyTo, _ := message.ReplyTo.(*client.MessageReplyToMessage)
+		var text string
+		if replyTo.Quote != nil && replyTo.Quote.Text != nil && !noContent {
+			text = formatter.Format(
+				replyTo.Quote.Text.Text,
+				replyTo.Quote.Text.Entities,
+				c.getFormatter(),
+			)
+			// make the whole quote fit one line
+			text = strings.ReplaceAll(text, "\n", " ")
+		}
+		if message.ChatId == replyTo.ChatId {
+			// obtain message from this chat
+			replyMsg, err := c.client.GetMessage(&client.GetMessageRequest{
+				ChatId:    message.ChatId,
+				MessageId: replyTo.MessageId,
 			})
 			if err != nil {
 				log.Errorf("<error fetching message: %s>", err.Error())
 				return
 			}
 
-		replyId, err := gateway.IdsDB.GetByTgIds(c.Session.Login, c.jid, message.ChatId, message.ReplyToMessageId)
-		if err != nil {
-			replyId = strconv.FormatInt(message.ReplyToMessageId, 10)
+			if !noContent {
+				tgReply = c.messageToStub(replyMsg, preview, text)
 			}
-		reply = &gateway.Reply{
+
+			replyId, err := gateway.IdsDB.GetByTgIds(c.Session.Login, c.jid, message.ChatId, replyTo.MessageId)
+			if err != nil {
+				replyId = strconv.FormatInt(replyTo.MessageId, 10)
+			}
+
+			gatewayReply = &gateway.Reply{
 				Author: fmt.Sprintf("%v@%s", c.getSenderId(replyMsg), gateway.Jid.Full()),
 				Id:     replyId,
 			}
+		} else if !noContent {
+			// it's safe to assume there's no need to pass ChatId here
+			// as it's needed only for pin messages which are not allowed in replies
+			if text == "" && replyTo.Content != nil {
+				text = c.messageContentToText(replyTo.Content, 0, preview)
+			}
+
+			if text == "" {
+				log.Error("Empty reply from other/unknown chat")
+				log.Debugf("replyTo: %#v", replyTo)
+				return
+			}
+
+			tgReply = &messageStub{
+				Sender: c.formatOrigin(replyTo.Origin) + " @ " + c.formatContact(replyTo.ChatId),
+				Date:   replyTo.OriginSendDate,
+				Text:   text,
+			}
+		}
 	}
 
 	return
@@ -359,9 +435,16 @@ func (c *Client) formatMessage(chatID int64, messageID int64, preview bool, mess
 		return ""
 	}
 
+	return c.formatMessageContent(preview, c.messageToStub(message, preview, ""))
+}
+
+func (c *Client) formatMessageContent(preview bool, message *messageStub) string {
 	var str strings.Builder
 	// add messageid and sender
-	str.WriteString(fmt.Sprintf("%v | %s | ", message.Id, c.formatSender(message)))
+	if message.MessageId != 0 {
+		str.WriteString(fmt.Sprintf("%v | ", message.MessageId))
+	}
+	str.WriteString(fmt.Sprintf("%s | ", message.Sender))
 	// add date
 	if !preview {
 		str.WriteString(
@@ -372,10 +455,7 @@ func (c *Client) formatMessage(chatID int64, messageID int64, preview bool, mess
 	}
 
 	// text message
-	var text string
-	if message.Content != nil {
-		text = c.messageToText(message, preview)
-	}
+	text := message.Text
 	if text != "" {
 		if !preview {
 			str.WriteString(text)
@@ -392,33 +472,33 @@ func (c *Client) formatMessage(chatID int64, messageID int64, preview bool, mess
 	return str.String()
 }
 
-func (c *Client) formatForward(fwd *client.MessageForwardInfo) string {
-	switch fwd.Origin.MessageForwardOriginType() {
-	case client.TypeMessageForwardOriginUser:
-		originUser := fwd.Origin.(*client.MessageForwardOriginUser)
+func (c *Client) formatOrigin(origin client.MessageOrigin) string {
+	if origin == nil {
+		return ""
+	}
+	switch origin.MessageOriginType() {
+	case client.TypeMessageOriginUser:
+		originUser := origin.(*client.MessageOriginUser)
 		return c.formatContact(originUser.SenderUserId)
-	case client.TypeMessageForwardOriginChat:
-		originChat := fwd.Origin.(*client.MessageForwardOriginChat)
+	case client.TypeMessageOriginChat:
+		originChat := origin.(*client.MessageOriginChat)
 		var signature string
 		if originChat.AuthorSignature != "" {
 			signature = fmt.Sprintf(" (%s)", originChat.AuthorSignature)
 		}
 		return c.formatContact(originChat.SenderChatId) + signature
-	case client.TypeMessageForwardOriginHiddenUser:
-		originUser := fwd.Origin.(*client.MessageForwardOriginHiddenUser)
+	case client.TypeMessageOriginHiddenUser:
+		originUser := origin.(*client.MessageOriginHiddenUser)
 		return originUser.SenderName
-	case client.TypeMessageForwardOriginChannel:
-		channel := fwd.Origin.(*client.MessageForwardOriginChannel)
+	case client.TypeMessageOriginChannel:
+		channel := origin.(*client.MessageOriginChannel)
 		var signature string
 		if channel.AuthorSignature != "" {
 			signature = fmt.Sprintf(" (%s)", channel.AuthorSignature)
 		}
 		return c.formatContact(channel.ChatId) + signature
-	case client.TypeMessageForwardOriginMessageImport:
-		originImport := fwd.Origin.(*client.MessageForwardOriginMessageImport)
-		return originImport.SenderName
 	}
-	return "Unknown forward type"
+	return "Unknown origin type"
 }
 
 func (c *Client) formatFile(file *client.File, compact bool) (string, string) {
@@ -564,20 +644,24 @@ func (c *Client) messageToText(message *client.Message, preview bool) string {
 		return "<empty message>"
 	}
 
-	markupFunction := formatter.EntityToXEP0393
-	switch message.Content.MessageContentType() {
+	return c.messageContentToText(message.Content, message.ChatId, preview)
+}
+
+func (c *Client) messageContentToText(content client.MessageContent, chatId int64, preview bool) string {
+	markupMode := c.getFormatter()
+	switch content.MessageContentType() {
 	case client.TypeMessageSticker:
-		sticker, _ := message.Content.(*client.MessageSticker)
+		sticker, _ := content.(*client.MessageSticker)
 		return sticker.Sticker.Emoji
 	case client.TypeMessageAnimatedEmoji:
-		animatedEmoji, _ := message.Content.(*client.MessageAnimatedEmoji)
+		animatedEmoji, _ := content.(*client.MessageAnimatedEmoji)
 		return animatedEmoji.Emoji
 	case client.TypeMessageBasicGroupChatCreate, client.TypeMessageSupergroupChatCreate:
 		return "has created chat"
 	case client.TypeMessageChatJoinByLink:
 		return "joined chat via invite link"
 	case client.TypeMessageChatAddMembers:
-		addMembers, _ := message.Content.(*client.MessageChatAddMembers)
+		addMembers, _ := content.(*client.MessageChatAddMembers)
 
 		text := "invited "
 		if len(addMembers.MemberUserIds) > 0 {
@@ -586,19 +670,19 @@ func (c *Client) messageToText(message *client.Message, preview bool) string {
 
 		return text
 	case client.TypeMessageChatDeleteMember:
-		deleteMember, _ := message.Content.(*client.MessageChatDeleteMember)
+		deleteMember, _ := content.(*client.MessageChatDeleteMember)
 		return "kicked " + c.formatContact(deleteMember.UserId)
 	case client.TypeMessagePinMessage:
-		pinMessage, _ := message.Content.(*client.MessagePinMessage)
-		return "pinned message: " + c.formatMessage(message.ChatId, pinMessage.MessageId, preview, nil)
+		pinMessage, _ := content.(*client.MessagePinMessage)
+		return "pinned message: " + c.formatMessage(chatId, pinMessage.MessageId, preview, nil)
 	case client.TypeMessageChatChangeTitle:
-		changeTitle, _ := message.Content.(*client.MessageChatChangeTitle)
+		changeTitle, _ := content.(*client.MessageChatChangeTitle)
 		return "chat title set to: " + changeTitle.Title
 	case client.TypeMessageLocation:
-		location, _ := message.Content.(*client.MessageLocation)
+		location, _ := content.(*client.MessageLocation)
 		return c.formatLocation(location.Location)
 	case client.TypeMessageVenue:
-		venue, _ := message.Content.(*client.MessageVenue)
+		venue, _ := content.(*client.MessageVenue)
 		if preview {
 			return venue.Venue.Title
 		} else {
@@ -610,86 +694,86 @@ func (c *Client) messageToText(message *client.Message, preview bool) string {
 			)
 		}
 	case client.TypeMessagePhoto:
-		photo, _ := message.Content.(*client.MessagePhoto)
+		photo, _ := content.(*client.MessagePhoto)
 		if preview {
 			return photo.Caption.Text
 		} else {
 			return formatter.Format(
 				photo.Caption.Text,
 				photo.Caption.Entities,
-				markupFunction,
+				markupMode,
 			)
 		}
 	case client.TypeMessageAudio:
-		audio, _ := message.Content.(*client.MessageAudio)
+		audio, _ := content.(*client.MessageAudio)
 		if preview {
 			return audio.Caption.Text
 		} else {
 			return formatter.Format(
 				audio.Caption.Text,
 				audio.Caption.Entities,
-				markupFunction,
+				markupMode,
 			)
 		}
 	case client.TypeMessageVideo:
-		video, _ := message.Content.(*client.MessageVideo)
+		video, _ := content.(*client.MessageVideo)
 		if preview {
 			return video.Caption.Text
 		} else {
 			return formatter.Format(
 				video.Caption.Text,
 				video.Caption.Entities,
-				markupFunction,
+				markupMode,
 			)
 		}
 	case client.TypeMessageDocument:
-		document, _ := message.Content.(*client.MessageDocument)
+		document, _ := content.(*client.MessageDocument)
 		if preview {
 			return document.Caption.Text
 		} else {
 			return formatter.Format(
 				document.Caption.Text,
 				document.Caption.Entities,
-				markupFunction,
+				markupMode,
 			)
 		}
 	case client.TypeMessageText:
-		text, _ := message.Content.(*client.MessageText)
+		text, _ := content.(*client.MessageText)
 		if preview {
 			return text.Text.Text
 		} else {
 			return formatter.Format(
 				text.Text.Text,
 				text.Text.Entities,
-				markupFunction,
+				markupMode,
 			)
 		}
 	case client.TypeMessageVoiceNote:
-		voice, _ := message.Content.(*client.MessageVoiceNote)
+		voice, _ := content.(*client.MessageVoiceNote)
 		if preview {
 			return voice.Caption.Text
 		} else {
 			return formatter.Format(
 				voice.Caption.Text,
 				voice.Caption.Entities,
-				markupFunction,
+				markupMode,
 			)
 		}
 	case client.TypeMessageVideoNote:
 		return ""
 	case client.TypeMessageAnimation:
-		animation, _ := message.Content.(*client.MessageAnimation)
+		animation, _ := content.(*client.MessageAnimation)
 		if preview {
 			return animation.Caption.Text
 		} else {
 			return formatter.Format(
 				animation.Caption.Text,
 				animation.Caption.Entities,
-				markupFunction,
+				markupMode,
 			)
 		}
 	case client.TypeMessageContact:
-		contact, _ := message.Content.(*client.MessageContact)
+		contact, _ := content.(*client.MessageContact)
 		if preview {
 			return contact.Contact.FirstName + " " + contact.Contact.LastName
 		} else {
@@ -707,10 +791,10 @@ func (c *Client) messageToText(message *client.Message, preview bool) string {
 			)
 		}
 	case client.TypeMessageDice:
-		dice, _ := message.Content.(*client.MessageDice)
+		dice, _ := content.(*client.MessageDice)
 		return fmt.Sprintf("%s 1d6: [%v]", dice.Emoji, dice.Value)
 	case client.TypeMessagePoll:
-		poll, _ := message.Content.(*client.MessagePoll)
+		poll, _ := content.(*client.MessagePoll)
 
 		if preview {
 			return poll.Poll.Question
@@ -735,9 +819,25 @@ func (c *Client) messageToText(message *client.Message, preview bool) string {
 
 			return strings.Join(rows, "\n")
 		}
+	case client.TypeMessageChatSetMessageAutoDeleteTime:
+		ttl, _ := content.(*client.MessageChatSetMessageAutoDeleteTime)
+		name := c.formatContact(ttl.FromUserId)
+		if name == "" {
+			if ttl.MessageAutoDeleteTime == 0 {
+				return "The self-destruct timer was disabled"
+			} else {
+				return fmt.Sprintf("The self-destruct timer was set to %v seconds", ttl.MessageAutoDeleteTime)
+			}
+		} else {
+			if ttl.MessageAutoDeleteTime == 0 {
+				return fmt.Sprintf("%s disabled the self-destruct timer", name)
+			} else {
+				return fmt.Sprintf("%s set the self-destruct timer to %v seconds", name, ttl.MessageAutoDeleteTime)
+			}
+		}
 	}
 
-	return fmt.Sprintf("unknown message (%s)", message.Content.MessageContentType())
+	return fmt.Sprintf("unknown message (%s)", content.MessageContentType())
 }
 
 func (c *Client) contentToFile(content client.MessageContent) (*client.File, *client.File) {
@@ -749,7 +849,7 @@ func (c *Client) contentToFile(content client.MessageContent) (*client.File, *cl
 	case client.TypeMessageSticker:
 		sticker, _ := content.(*client.MessageSticker)
 		file := sticker.Sticker.Sticker
-		if sticker.Sticker.IsAnimated && sticker.Sticker.Thumbnail != nil && sticker.Sticker.Thumbnail.File != nil {
+		if sticker.Sticker.Format.StickerFormatType() == client.TypeStickerFormatTgs && sticker.Sticker.Thumbnail != nil && sticker.Sticker.Thumbnail.File != nil {
 			file = sticker.Sticker.Thumbnail.File
 		}
 		return file, nil
@@ -806,22 +906,27 @@ func (c *Client) contentToFile(content client.MessageContent) (*client.File, *cl
 
 func (c *Client) countCharsInLines(lines *[]string) (count int) {
 	for _, line := range *lines {
-		count += len(line)
+		count += utf8.RuneCountInString(line)
 	}
 	return
 }
 
-func (c *Client) messageToPrefix(message *client.Message, previewString string, fileString string, replyMsg *client.Message) (string, int, int) {
+func (c *Client) isCarbonsEnabled() bool {
+	return gateway.MessageOutgoingPermissionVersion > 0 && c.Session.Carbons
+}
+
+func (c *Client) messageToPrefix(message *client.Message, previewString string, fileString string, suppressReply bool) (string, *gateway.Reply) {
 	isPM, err := c.IsPM(message.ChatId)
 	if err != nil {
 		log.Errorf("Could not determine if chat is PM: %v", err)
 	}
+	// with carbons, hide for all messages in PM and only for outgoing in group chats
+	hideSender := c.isCarbonsEnabled() && (message.IsOutgoing || isPM)
 
-	var replyStart, replyEnd int
 	prefix := []string{}
 	// message direction
 	var directionChar string
-	if !isPM || !gateway.MessageOutgoingPermission || !c.Session.Carbons {
+	if !hideSender {
 		if c.Session.AsciiArrows {
 			if message.IsOutgoing {
 				directionChar = "> "
@@ -840,26 +945,45 @@ func (c *Client) messageToPrefix(message *client.Message, previewString string,
 		prefix = append(prefix, directionChar+strconv.FormatInt(message.Id, 10))
 	}
 	// show sender in group chats
-	if !isPM {
+	if !hideSender {
 		sender := c.formatSender(message)
 		if sender != "" {
 			prefix = append(prefix, sender)
 		}
 	}
+
 	// reply to
-	if message.ReplyToMessageId != 0 {
+	var reply *gateway.Reply
+	if !suppressReply {
+		preview := true
+		gwReply, tgReply := c.getMessageReply(message, preview, false)
+
+		if tgReply != nil {
+			reply = gwReply
+
+			var replyStart, replyEnd int
+
 			if len(prefix) > 0 {
 				replyStart = c.countCharsInLines(&prefix) + (len(prefix)-1)*len(messageHeaderSeparator)
 			}
-		replyLine := "reply: " + c.formatMessage(message.ChatId, message.ReplyToMessageId, true, replyMsg)
+
+			replyLine := "reply: " + c.formatMessageContent(preview, tgReply)
 			prefix = append(prefix, replyLine)
-		replyEnd = replyStart + len(replyLine)
+
+			replyEnd = replyStart + utf8.RuneCountInString(replyLine)
 			if len(prefix) > 0 {
 				replyEnd += len(messageHeaderSeparator)
 			}
+
+			if reply != nil {
+				reply.Start = uint64(replyStart)
+				reply.End = uint64(replyEnd)
 			}
+		}
+	}
+
 	if message.ForwardInfo != nil {
-		prefix = append(prefix, "fwd: "+c.formatForward(message.ForwardInfo))
+		prefix = append(prefix, "fwd: "+c.formatOrigin(message.ForwardInfo.Origin))
 	}
 	// preview
 	if previewString != "" {
@@ -870,7 +994,7 @@ func (c *Client) messageToPrefix(message *client.Message, previewString string,
 		prefix = append(prefix, "file: "+fileString)
 	}
 
-	return strings.Join(prefix, messageHeaderSeparator), replyStart, replyEnd
+	return strings.Join(prefix, messageHeaderSeparator), reply
 }
 
 func (c *Client) ensureDownloadFile(file *client.File) *client.File {
@@ -889,24 +1013,28 @@ func (c *Client) ensureDownloadFile(file *client.File) *client.File {
 	return file
 }
 
+// \n if it is groupchat and message is not empty
+func (c *Client) getPrefixSeparator(chatId int64) string {
+	var separator string
+	if chatId < 0 {
+		separator = "\n"
+	} else if chatId > 0 {
+		separator = " | "
+	}
+	return separator
+}
+
 // ProcessIncomingMessage transfers a message to XMPP side and marks it as read on Telegram side
 func (c *Client) ProcessIncomingMessage(chatId int64, message *client.Message) {
-	var text, oob, auxText, nick, contentType string
-	var err error
+	isCarbon := c.isCarbonsEnabled() && message.IsOutgoing
+	jids := c.getCarbonFullJids(isCarbon, "")
 
-	reply, replyMsg := c.getMessageReply(message)
+	var text, oob, auxText string
+	var reply *gateway.Reply
+	var replyObtained bool
 
 	content := message.Content
-	if content != nil {
-		contentType = content.MessageContentType()
-	}
-
-	if contentType == client.TypeMessageChatChangeTitle {
-		changeTitle, _ := content.(*client.MessageChatChangeTitle)
-		nick = changeTitle.Title
-	}
-
-	if contentType == client.TypeMessageChatChangePhoto {
+	if content != nil && content.MessageContentType() == client.TypeMessageChatChangePhoto {
 		chat, err := c.client.GetChat(&client.GetChatRequest{
 			ChatId: chatId,
 		})
@@ -930,73 +1058,72 @@ func (c *Client) ProcessIncomingMessage(chatId int64, message *client.Message) {
 			fileName, link := c.formatFile(file, false)
 
 			oob = link
-			if c.Session.OOBMode && oob != "" {
-				typ := message.Content.MessageContentType()
-				if typ != client.TypeMessageSticker {
-					auxText = text
+			oobSwap := c.Session.OOBMode && oob != ""
+
+			var ignorePrefix bool
+			if oobSwap {
+				if text == "" || message.Content.MessageContentType() == client.TypeMessageSticker {
+					isPM, err := c.IsPM(chatId)
+					if err == nil {
+						ignorePrefix = isPM && c.isCarbonsEnabled()
 					}
-				text = oob
-			} else if !c.Session.RawMessages {
+				}
+			}
+
+			if !c.Session.RawMessages && !ignorePrefix {
 				var newText strings.Builder
 
-				prefix, replyStart, replyEnd := c.messageToPrefix(message, previewName, fileName, replyMsg)
+				prefix, prefixReply := c.messageToPrefix(message, previewName, fileName, false)
+				reply = prefixReply
+				replyObtained = true
 				newText.WriteString(prefix)
-				if reply != nil {
-					reply.Start = uint64(replyStart)
-					reply.End = uint64(replyEnd)
-				}
 
 				if text != "" {
-					// \n if it is groupchat and message is not empty
 					if prefix != "" {
-						if chatId < 0 {
-							newText.WriteString("\n")
-						} else if chatId > 0 {
-							newText.WriteString(" | ")
+						newText.WriteString(c.getPrefixSeparator(chatId))
 					}
-					}
-
 					newText.WriteString(text)
 				}
 				text = newText.String()
 			}
+
+			if oobSwap {
+				if !ignorePrefix {
+					auxText = text
 				}
+				text = oob
+			}
+		}
+	}
+	if !replyObtained {
+		reply, _ = c.getMessageReply(message, false, true)
 	}
 
 	// mark message as read
-	c.client.ViewMessages(&client.ViewMessagesRequest{
-		ChatId:     chatId,
-		MessageIds: []int64{message.Id},
-		ForceRead:  true,
-	})
+	if !c.Session.Receipts {
+		c.MarkAsRead(chatId, message.Id)
+	}
 
 	// forward message to XMPP
 	sId := strconv.FormatInt(message.Id, 10)
 	sChatId := strconv.FormatInt(chatId, 10)
 
-	var jids []string
-	var isPM bool
-	if gateway.MessageOutgoingPermission && c.Session.Carbons {
-		isPM, err = c.IsPM(chatId)
-		if err != nil {
-			log.Errorf("Could not determine if chat is PM: %v", err)
+	for _, jid := range jids {
+		gateway.SendMessageWithOOB(jid, sChatId, text, sId, c.xmpp, reply, oob, "", isCarbon, c.Session.Receipts)
+		if auxText != "" {
+			gateway.SendMessage(jid, sChatId, auxText, sId, c.xmpp, reply, "", isCarbon, c.Session.Receipts)
 		}
 	}
-	isOutgoing := isPM && message.IsOutgoing
-	if isOutgoing {
-		for resource := range c.resourcesRange() {
-			jids = append(jids, c.jid+"/"+resource)
-		}
-	} else {
-		jids = []string{c.jid}
+	c.UpdateLastChatMessageId(chatId, sId)
 }
 
-	for _, jid := range jids {
-		gateway.SendMessageWithOOB(jid, sChatId, text, sId, c.xmpp, reply, oob, isOutgoing, nick)
-		if auxText != "" {
-			gateway.SendMessage(jid, sChatId, auxText, sId, c.xmpp, reply, isOutgoing, nick)
-		}
-	}
+// MarkAsRead marks a message as read
+func (c *Client) MarkAsRead(chatId, messageId int64) {
+	c.client.ViewMessages(&client.ViewMessagesRequest{
+		ChatId:     chatId,
+		MessageIds: []int64{messageId},
+		ForceRead:  true,
+	})
 }
 
 // PrepareMessageContent creates a simple text message
@@ -1097,7 +1224,7 @@ func (c *Client) ProcessOutgoingMessage(chatID int64, text string, returnJid str
 
 	tgMessage, err := c.client.SendMessage(&client.SendMessageRequest{
 		ChatId:              chatID,
-		ReplyToMessageId:    reply,
+		ReplyTo:             &client.InputMessageReplyToMessage{MessageId: reply},
 		InputMessageContent: content,
 	})
 	if err != nil {
@@ -1181,9 +1308,12 @@ func (c *Client) resourcesRange() chan string {
 
 // resend statuses to (to another resource, for example)
 func (c *Client) roster(resource string) {
+	c.locks.resourcesLock.Lock()
 	if _, ok := c.resources[resource]; ok {
+		c.locks.resourcesLock.Unlock()
 		return // we know it
 	}
+	c.locks.resourcesLock.Unlock()
 
 	log.Warnf("Sending roster for %v", resource)
 
@@ -1191,13 +1321,13 @@ func (c *Client) roster(resource string) {
 		c.ProcessStatusUpdate(chat, "", "")
 	}
 
-	gateway.SendPresence(c.xmpp, c.jid, gateway.SPStatus("Logged in as: "+c.Session.Login))
+	c.sendPresence(gateway.SPStatus("Logged in as: " + c.Session.Login))
 
 	c.addResource(resource)
 }
 
 // get last messages from specified chat
-func (c *Client) getLastMessages(id int64, query string, from int64, count int32) (*client.Messages, error) {
+func (c *Client) getLastMessages(id int64, query string, from int64, count int32) (*client.FoundChatMessages, error) {
 	return c.client.SearchChatMessages(&client.SearchChatMessagesRequest{
 		ChatId:   id,
 		Query:    query,
@@ -1250,10 +1380,18 @@ func (c *Client) GetChatDescription(chat *client.Chat) string {
 			UserId: privateType.UserId,
 		})
 		if err == nil {
-			if fullInfo.Bio != "" {
-				return fullInfo.Bio
-			} else if fullInfo.Description != "" {
-				return fullInfo.Description
+			if fullInfo.Bio != nil && fullInfo.Bio.Text != "" {
+				return formatter.Format(
+					fullInfo.Bio.Text,
+					fullInfo.Bio.Entities,
+					c.getFormatter(),
+				)
+			} else if fullInfo.BotInfo != nil {
+				if fullInfo.BotInfo.ShortDescription != "" {
+					return fullInfo.BotInfo.ShortDescription
+				} else {
+					return fullInfo.BotInfo.Description
+				}
 			}
 		} else {
 			log.Warnf("Coudln't retrieve private chat info: %v", err.Error())
@@ -1284,9 +1422,7 @@ func (c *Client) GetChatDescription(chat *client.Chat) string {
 
 // subscribe to a Telegram ID
 func (c *Client) subscribeToID(id int64, chat *client.Chat) {
-	var args []args.V
-	args = append(args, gateway.SPFrom(strconv.FormatInt(id, 10)))
-	args = append(args, gateway.SPType("subscribe"))
+	args := gateway.SimplePresence(id, "subscribe")
 
 	if chat == nil {
 		chat, _, _ = c.GetContactByID(id, nil)
@@ -1297,11 +1433,11 @@ func (c *Client) subscribeToID(id int64, chat *client.Chat) {
 		gateway.SetNickname(c.jid, strconv.FormatInt(id, 10), chat.Title, c.xmpp)
 	}
 
-	gateway.SendPresence(
-		c.xmpp,
-		c.jid,
-		args...,
-	)
+	c.sendPresence(args...)
+}
+
+func (c *Client) sendPresence(args ...args.V) error {
+	return gateway.SendPresence(c.xmpp, c.jid, args...)
 }
 
 func (c *Client) prepareDiskSpace(size uint64) {
@@ -1333,7 +1469,10 @@ func (c *Client) GetVcardInfo(toID int64) (VCardInfo, error) {
 		info.Info = c.GetChatDescription(chat)
 	}
 	if user != nil {
-		info.Nickname = user.Username
+		if user.Usernames != nil {
+			info.Nicknames = make([]string, len(user.Usernames.ActiveUsernames))
+			copy(info.Nicknames, user.Usernames.ActiveUsernames)
+		}
 		info.Given = user.FirstName
 		info.Family = user.LastName
 		info.Tel = user.PhoneNumber
@@ -1341,3 +1480,164 @@ func (c *Client) GetVcardInfo(toID int64) (VCardInfo, error) {
 
 	return info, nil
 }
+
+func (c *Client) UpdateChatNicknames() {
+	for _, id := range c.cache.ChatsKeys() {
+		chat, ok := c.cache.GetChat(id)
+		if ok {
+			newArgs := []args.V{
+				gateway.SPNickname(chat.Title),
+			}
+			newArgs = gateway.SPAppendFrom(newArgs, id)
+
+			cachedStatus, ok := c.cache.GetStatus(id)
+			if ok {
+				show, status, typ := cachedStatus.Destruct()
+				newArgs = append(newArgs, gateway.SPShow(show), gateway.SPStatus(status))
+				if typ != "" {
+					newArgs = append(newArgs, gateway.SPType(typ))
+				}
+			}
+
+			c.sendPresence(newArgs...)
+
+			gateway.SetNickname(c.jid, strconv.FormatInt(id, 10), chat.Title, c.xmpp)
+		}
+	}
+}
+
+// AddToEditOutbox temporarily store the resource from which a replace message with given ID was sent
+func (c *Client) AddToEditOutbox(xmppId, resource string) {
+	c.locks.editOutboxLock.Lock()
+	defer c.locks.editOutboxLock.Unlock()
+
+	c.editOutbox[xmppId] = resource
+}
+
+func (c *Client) popFromEditOutbox(xmppId string) string {
+	c.locks.editOutboxLock.Lock()
+	defer c.locks.editOutboxLock.Unlock()
+
+	resource, ok := c.editOutbox[xmppId]
+	if ok {
+		delete(c.editOutbox, xmppId)
+	} else {
+		log.Warnf("No %v xmppId in edit outbox", xmppId)
+	}
+	return resource
+}
+
+// AddToOutbox remembers the resource from which a message with given ID was sent
+func (c *Client) AddToOutbox(xmppId, resource string) {
+	c.locks.outboxLock.Lock()
+	defer c.locks.outboxLock.Unlock()
+
+	c.outbox[xmppId] = resource
+}
+
+func (c *Client) getFromOutbox(xmppId string) string {
+	c.locks.outboxLock.Lock()
+	defer c.locks.outboxLock.Unlock()
+
+	resource, ok := c.outbox[xmppId]
+	if !ok {
+		log.Warnf("No %v xmppId in outbox", xmppId)
+	}
+	return resource
+}
+
+func (c *Client) getCarbonFullJids(isOutgoing bool, ignoredResource string) []string {
+	var jids []string
+	if isOutgoing {
+		for resource := range c.resourcesRange() {
+			if ignoredResource == "" || resource != ignoredResource {
+				jids = append(jids, c.jid+"/"+resource)
+			}
+		}
+	} else {
+		jids = []string{c.jid}
+	}
+	return jids
+}
+
+func (c *Client) calculateMessageHash(messageId int64, content client.MessageContent) uint64 {
+	var h maphash.Hash
+	h.SetSeed(c.msgHashSeed)
+
+	buf8 := make([]byte, 8)
+	binary.BigEndian.PutUint64(buf8, uint64(messageId))
+	h.Write(buf8)
+
+	if content != nil && content.MessageContentType() == client.TypeMessageText {
+		textContent, ok := content.(*client.MessageText)
+		if !ok {
+			uhOh()
+		}
+
+		if textContent.Text != nil {
+			h.WriteString(textContent.Text.Text)
+			for _, entity := range textContent.Text.Entities {
+				buf4 := make([]byte, 4)
+				binary.BigEndian.PutUint32(buf4, uint32(entity.Offset))
+				h.Write(buf4)
+				binary.BigEndian.PutUint32(buf4, uint32(entity.Length))
+				h.Write(buf4)
+				h.WriteString(entity.Type.TextEntityTypeType())
+			}
+		}
+	}
+
+	return h.Sum64()
+}
+
+func (c *Client) updateLastMessageHash(chatId, messageId int64, content client.MessageContent) {
+	c.locks.lastMsgHashesLock.Lock()
+	defer c.locks.lastMsgHashesLock.Unlock()
+
+	c.lastMsgHashes[chatId] = c.calculateMessageHash(messageId, content)
+}
+
+func (c *Client) hasLastMessageHashChanged(chatId, messageId int64, content client.MessageContent) bool {
+	c.locks.lastMsgHashesLock.Lock()
+	defer c.locks.lastMsgHashesLock.Unlock()
+
+	oldHash, ok := c.lastMsgHashes[chatId]
+	newHash := c.calculateMessageHash(messageId, content)
+
+	if !ok {
+		log.Warnf("Last message hash for chat %v does not exist", chatId)
+	}
+	log.WithFields(log.Fields{
+		"old hash": oldHash,
+		"new hash": newHash,
+	}).Info("Message hashes")
+
+	return !ok || oldHash != newHash
+}
+
+func (c *Client) UpdateLastChatMessageId(chatId int64, messageId string) {
+	c.locks.lastMsgIdsLock.Lock()
+	defer c.locks.lastMsgIdsLock.Unlock()
+
+	c.lastMsgIds[chatId] = messageId
+}
+
+func (c *Client) getLastChatMessageId(chatId int64) (string, bool) {
+	c.locks.lastMsgIdsLock.RLock()
+	defer c.locks.lastMsgIdsLock.RUnlock()
+
+	xmppId, ok := c.lastMsgIds[chatId]
+	return xmppId, ok
+}
+
+func (c *Client) getFormatter() formatter.MarkupModeType {
+	return formatter.MarkupModeXEP0393
+}
+
+func (c *Client) usernamesToString(usernames []string) string {
+	var atUsernames []string
+	for _, username := range usernames {
+		atUsernames = append(atUsernames, "@"+username)
+	}
+	return strings.Join(atUsernames, ", ")
+}

telegram/utils_test.go

@@ -369,6 +369,53 @@ func TestMessageAnimation(t *testing.T) {
 	}
 }
 
+func TestMessageTtl1(t *testing.T) {
+	ttl := client.Message{
+		Content: &client.MessageChatSetMessageAutoDeleteTime{},
+	}
+	text := (&Client{}).messageToText(&ttl, false)
+	if text != "The self-destruct timer was disabled" {
+		t.Errorf("Wrong anonymous off ttl label: %v", text)
+	}
+}
+
+func TestMessageTtl2(t *testing.T) {
+	ttl := client.Message{
+		Content: &client.MessageChatSetMessageAutoDeleteTime{
+			MessageAutoDeleteTime: 3,
+		},
+	}
+	text := (&Client{}).messageToText(&ttl, false)
+	if text != "The self-destruct timer was set to 3 seconds" {
+		t.Errorf("Wrong anonymous ttl label: %v", text)
+	}
+}
+
+func TestMessageTtl3(t *testing.T) {
+	ttl := client.Message{
+		Content: &client.MessageChatSetMessageAutoDeleteTime{
+			FromUserId: 3,
+		},
+	}
+	text := (&Client{}).messageToText(&ttl, false)
+	if text != "unknown contact: TDlib instance is offline disabled the self-destruct timer" {
+		t.Errorf("Wrong off ttl label: %v", text)
+	}
+}
+
+func TestMessageTtl4(t *testing.T) {
+	ttl := client.Message{
+		Content: &client.MessageChatSetMessageAutoDeleteTime{
+			FromUserId:            3,
+			MessageAutoDeleteTime: 3,
+		},
+	}
+	text := (&Client{}).messageToText(&ttl, false)
+	if text != "unknown contact: TDlib instance is offline set the self-destruct timer to 3 seconds" {
+		t.Errorf("Wrong ttl label: %v", text)
+	}
+}
+
 func TestMessageUnknown(t *testing.T) {
 	unknown := client.Message{
 		Content: &client.MessageExpiredPhoto{},
@@ -384,20 +431,17 @@ func TestMessageToPrefix1(t *testing.T) {
 		Id:         42,
 		IsOutgoing: true,
 		ForwardInfo: &client.MessageForwardInfo{
-			Origin: &client.MessageForwardOriginHiddenUser{
+			Origin: &client.MessageOriginHiddenUser{
 				SenderName: "ziz",
 			},
 		},
 	}
-	prefix, replyStart, replyEnd := (&Client{Session: &persistence.Session{}}).messageToPrefix(&message, "", "", nil)
+	prefix, gatewayReply := (&Client{Session: &persistence.Session{}}).messageToPrefix(&message, "", "", false)
 	if prefix != "➡ 42 | fwd: ziz" {
 		t.Errorf("Wrong prefix: %v", prefix)
 	}
-	if replyStart != 0 {
-		t.Errorf("Wrong replyStart: %v", replyStart)
-	}
-	if replyEnd != 0 {
-		t.Errorf("Wrong replyEnd: %v", replyEnd)
+	if gatewayReply != nil {
+		t.Errorf("Reply is not nil: %v", gatewayReply)
 	}
 }
 
@@ -405,20 +449,17 @@ func TestMessageToPrefix2(t *testing.T) {
 	message := client.Message{
 		Id: 56,
 		ForwardInfo: &client.MessageForwardInfo{
-			Origin: &client.MessageForwardOriginChannel{
+			Origin: &client.MessageOriginChannel{
 				AuthorSignature: "zaz",
 			},
 		},
 	}
-	prefix, replyStart, replyEnd := (&Client{Session: &persistence.Session{}}).messageToPrefix(&message, "y.jpg", "", nil)
+	prefix, gatewayReply := (&Client{Session: &persistence.Session{}}).messageToPrefix(&message, "y.jpg", "", false)
 	if prefix != "⬅ 56 | fwd:  (zaz) | preview: y.jpg" {
 		t.Errorf("Wrong prefix: %v", prefix)
 	}
-	if replyStart != 0 {
-		t.Errorf("Wrong replyStart: %v", replyStart)
-	}
-	if replyEnd != 0 {
-		t.Errorf("Wrong replyEnd: %v", replyEnd)
+	if gatewayReply != nil {
+		t.Errorf("Reply is not nil: %v", gatewayReply)
 	}
 }
 
@@ -426,20 +467,17 @@ func TestMessageToPrefix3(t *testing.T) {
 	message := client.Message{
 		Id: 56,
 		ForwardInfo: &client.MessageForwardInfo{
-			Origin: &client.MessageForwardOriginChannel{
+			Origin: &client.MessageOriginChannel{
 				AuthorSignature: "zuz",
 			},
 		},
 	}
-	prefix, replyStart, replyEnd := (&Client{Session: &persistence.Session{AsciiArrows: true}}).messageToPrefix(&message, "", "a.jpg", nil)
+	prefix, gatewayReply := (&Client{Session: &persistence.Session{AsciiArrows: true}}).messageToPrefix(&message, "", "a.jpg", false)
 	if prefix != "< 56 | fwd:  (zuz) | file: a.jpg" {
 		t.Errorf("Wrong prefix: %v", prefix)
 	}
-	if replyStart != 0 {
-		t.Errorf("Wrong replyStart: %v", replyStart)
-	}
-	if replyEnd != 0 {
-		t.Errorf("Wrong replyEnd: %v", replyEnd)
+	if gatewayReply != nil {
+		t.Errorf("Reply is not nil: %v", gatewayReply)
 	}
 }
 
@@ -448,15 +486,12 @@ func TestMessageToPrefix4(t *testing.T) {
 		Id:         23,
 		IsOutgoing: true,
 	}
-	prefix, replyStart, replyEnd := (&Client{Session: &persistence.Session{AsciiArrows: true}}).messageToPrefix(&message, "", "", nil)
+	prefix, gatewayReply := (&Client{Session: &persistence.Session{AsciiArrows: true}}).messageToPrefix(&message, "", "", false)
 	if prefix != "> 23" {
 		t.Errorf("Wrong prefix: %v", prefix)
 	}
-	if replyStart != 0 {
-		t.Errorf("Wrong replyStart: %v", replyStart)
-	}
-	if replyEnd != 0 {
-		t.Errorf("Wrong replyEnd: %v", replyEnd)
+	if gatewayReply != nil {
+		t.Errorf("Reply is not nil: %v", gatewayReply)
 	}
 }
 
@@ -464,46 +499,95 @@ func TestMessageToPrefix5(t *testing.T) {
 	message := client.Message{
 		Id: 560,
 		ForwardInfo: &client.MessageForwardInfo{
-			Origin: &client.MessageForwardOriginChat{
+			Origin: &client.MessageOriginChat{
 				AuthorSignature: "zyz",
 			},
 		},
 	}
-	prefix, replyStart, replyEnd := (&Client{Session: &persistence.Session{AsciiArrows: true}}).messageToPrefix(&message, "h.jpg", "a.jpg", nil)
+	prefix, gatewayReply := (&Client{Session: &persistence.Session{AsciiArrows: true}}).messageToPrefix(&message, "h.jpg", "a.jpg", false)
 	if prefix != "< 560 | fwd:  (zyz) | preview: h.jpg | file: a.jpg" {
 		t.Errorf("Wrong prefix: %v", prefix)
 	}
-	if replyStart != 0 {
-		t.Errorf("Wrong replyStart: %v", replyStart)
-	}
-	if replyEnd != 0 {
-		t.Errorf("Wrong replyEnd: %v", replyEnd)
+	if gatewayReply != nil {
+		t.Errorf("Reply is not nil: %v", gatewayReply)
 	}
 }
 
 func TestMessageToPrefix6(t *testing.T) {
 	message := client.Message{
 		Id:         23,
+		ChatId:     25,
 		IsOutgoing: true,
-		ReplyToMessageId: 42,
+		ReplyTo: &client.MessageReplyToMessage{
+			ChatId: 41,
+			Quote: &client.TextQuote{
+				Text: &client.FormattedText{
+					Text: "tist\nuz\niz",
+				},
+			},
+			Origin: &client.MessageOriginHiddenUser{
+				SenderName: "ziz",
+			},
+		},
 	}
-	reply := client.Message{
-		Id: 42,
+	prefix, gatewayReply := (&Client{Session: &persistence.Session{AsciiArrows: true}}).messageToPrefix(&message, "", "", false)
+	if prefix != "> 23 | reply: ziz @ unknown contact: TDlib instance is offline | tist uz iz" {
+		t.Errorf("Wrong prefix: %v", prefix)
+	}
+	if gatewayReply != nil {
+		t.Errorf("Reply is not nil: %v", gatewayReply)
+	}
+}
+
+func TestMessageToPrefix7(t *testing.T) {
+	message := client.Message{
+		Id:         23,
+		ChatId:     42,
+		IsOutgoing: true,
+		ReplyTo: &client.MessageReplyToMessage{
+			ChatId: 41,
 			Content: &client.MessageText{
 				Text: &client.FormattedText{
 					Text: "tist",
 				},
 			},
+			Origin: &client.MessageOriginChannel{
+				AuthorSignature: "zaz",
+			},
+		},
 	}
-	prefix, replyStart, replyEnd := (&Client{Session: &persistence.Session{AsciiArrows: true}}).messageToPrefix(&message, "", "", &reply)
-	if prefix != "> 23 | reply: 42 |  | tist" {
+	prefix, gatewayReply := (&Client{Session: &persistence.Session{AsciiArrows: true}}).messageToPrefix(&message, "", "", false)
+	if prefix != "> 23 | reply:  (zaz) @ unknown contact: TDlib instance is offline | tist" {
 		t.Errorf("Wrong prefix: %v", prefix)
 	}
-	if replyStart != 4 {
-		t.Errorf("Wrong replyStart: %v", replyStart)
+	if gatewayReply != nil {
+		t.Errorf("Reply is not nil: %v", gatewayReply)
 	}
-	if replyEnd != 26 {
-		t.Errorf("Wrong replyEnd: %v", replyEnd)
+}
+
+func TestMessageToPrefix8(t *testing.T) {
+	message := client.Message{
+		Id:         23,
+		ChatId:     42,
+		IsOutgoing: true,
+		ReplyTo: &client.MessageReplyToMessage{
+			ChatId: 41,
+			Content: &client.MessageText{
+				Text: &client.FormattedText{
+					Text: "tist",
+				},
+			},
+			Origin: &client.MessageOriginChannel{
+				AuthorSignature: "zuz",
+			},
+		},
+	}
+	prefix, gatewayReply := (&Client{Session: &persistence.Session{AsciiArrows: true}}).messageToPrefix(&message, "", "", true)
+	if prefix != "> 23" {
+		t.Errorf("Wrong prefix: %v", prefix)
+	}
+	if gatewayReply != nil {
+		t.Errorf("Reply is not nil: %v", gatewayReply)
 	}
 }
 

xmpp/extensions/extensions.go

@@ -7,8 +7,8 @@ import (
 	"gosrc.io/xmpp/stanza"
 )
 
-// NickExtension is from XEP-0172
-type NickExtension struct {
+// PresenceNickExtension is from XEP-0172
+type PresenceNickExtension struct {
 	XMLName xml.Name `xml:"http://jabber.org/protocol/nick nick"`
 	Text    string   `xml:",chardata"`
 }
@@ -154,12 +154,19 @@ type CarbonSent struct {
 }
 
 // ComponentPrivilege is from XEP-0356
-type ComponentPrivilege struct {
+type ComponentPrivilege1 struct {
 	XMLName   xml.Name         `xml:"urn:xmpp:privilege:1 privilege"`
 	Perms     []ComponentPerm  `xml:"perm"`
 	Forwarded stanza.Forwarded `xml:"urn:xmpp:forward:0 forwarded"`
 }
 
+// ComponentPrivilege is from XEP-0356
+type ComponentPrivilege2 struct {
+	XMLName   xml.Name         `xml:"urn:xmpp:privilege:2 privilege"`
+	Perms     []ComponentPerm  `xml:"perm"`
+	Forwarded stanza.Forwarded `xml:"urn:xmpp:forward:0 forwarded"`
+}
+
 // ComponentPerm is from XEP-0356
 type ComponentPerm struct {
 	XMLName xml.Name `xml:"perm"`
@@ -186,8 +193,28 @@ type Replace struct {
 	Id      string   `xml:"id,attr"`
 }
 
+// QueryRegister is from XEP-0077
+type QueryRegister struct {
+	XMLName      xml.Name                 `xml:"jabber:iq:register query"`
+	Instructions string                   `xml:"instructions"`
+	Username     string                   `xml:"username"`
+	Registered   *QueryRegisterRegistered `xml:"registered"`
+	Remove       *QueryRegisterRemove     `xml:"remove"`
+	ResultSet    *stanza.ResultSet        `xml:"set,omitempty"`
+}
+
+// QueryRegisterRegistered is a child element from XEP-0077
+type QueryRegisterRegistered struct {
+	XMLName xml.Name `xml:"registered"`
+}
+
+// QueryRegisterRemove is a child element from XEP-0077
+type QueryRegisterRemove struct {
+	XMLName xml.Name `xml:"remove"`
+}
+
 // Namespace is a namespace!
-func (c NickExtension) Namespace() string {
+func (c PresenceNickExtension) Namespace() string {
 	return c.XMLName.Space
 }
 
@@ -227,7 +254,12 @@ func (c CarbonSent) Namespace() string {
 }
 
 // Namespace is a namespace!
-func (c ComponentPrivilege) Namespace() string {
+func (c ComponentPrivilege1) Namespace() string {
+	return c.XMLName.Space
+}
+
+// Namespace is a namespace!
+func (c ComponentPrivilege2) Namespace() string {
 	return c.XMLName.Space
 }
 
@@ -236,6 +268,16 @@ func (c Replace) Namespace() string {
 	return c.XMLName.Space
 }
 
+// Namespace is a namespace!
+func (c QueryRegister) Namespace() string {
+	return c.XMLName.Space
+}
+
+// GetSet getsets!
+func (c QueryRegister) GetSet() *stanza.ResultSet {
+	return c.ResultSet
+}
+
 // Name is a packet name
 func (ClientMessage) Name() string {
 	return "message"
@@ -259,13 +301,7 @@ func init() {
 	stanza.TypeRegistry.MapExtension(stanza.PKTPresence, xml.Name{
 		"http://jabber.org/protocol/nick",
 		"nick",
-	}, NickExtension{})
-
-	// message nick
-	stanza.TypeRegistry.MapExtension(stanza.PKTMessage, xml.Name{
-		"http://jabber.org/protocol/nick",
-		"nick",
-	}, NickExtension{})
+	}, PresenceNickExtension{})
 
 	// presence vcard update
 	stanza.TypeRegistry.MapExtension(stanza.PKTPresence, xml.Name{
@@ -303,15 +339,27 @@ func init() {
 		"sent",
 	}, CarbonSent{})
 
-	// component privilege
+	// component privilege v1
 	stanza.TypeRegistry.MapExtension(stanza.PKTMessage, xml.Name{
 		"urn:xmpp:privilege:1",
 		"privilege",
-	}, ComponentPrivilege{})
+	}, ComponentPrivilege1{})
+
+	// component privilege v2
+	stanza.TypeRegistry.MapExtension(stanza.PKTMessage, xml.Name{
+		"urn:xmpp:privilege:2",
+		"privilege",
+	}, ComponentPrivilege2{})
 
 	// message edit
 	stanza.TypeRegistry.MapExtension(stanza.PKTMessage, xml.Name{
 		"urn:xmpp:message-correct:0",
 		"replace",
 	}, Replace{})
+
+	// register query
+	stanza.TypeRegistry.MapExtension(stanza.PKTIQ, xml.Name{
+		"jabber:iq:register",
+		"query",
+	}, QueryRegister{})
 }

xmpp/gateway/gateway.go

@@ -3,12 +3,14 @@ package gateway
 import (
 	"encoding/xml"
 	"github.com/pkg/errors"
+	"strconv"
 	"strings"
 	"sync"
 
 	"dev.narayana.im/narayana/telegabber/badger"
 	"dev.narayana.im/narayana/telegabber/xmpp/extensions"
 
+	"github.com/google/uuid"
 	log "github.com/sirupsen/logrus"
 	"github.com/soheilhy/args"
 	"gosrc.io/xmpp"
@@ -22,6 +24,18 @@ type Reply struct {
 	End    uint64
 }
 
+type MarkerType byte
+
+const (
+	MarkerTypeReceived MarkerType = iota
+	MarkerTypeDisplayed
+)
+
+type marker struct {
+	Type MarkerType
+	Id   string
+}
+
 const NSNick string = "http://jabber.org/protocol/nick"
 
 // Queue stores presences to send later
@@ -38,30 +52,46 @@ var IdsDB badger.IdsDB
 // were changed and need to be re-flushed to the YamlDB
 var DirtySessions = false
 
-// MessageOutgoingPermission allows to fake outgoing messages by foreign JIDs
-var MessageOutgoingPermission = false
+// MessageOutgoingPermissionVersion contains a XEP-0356 version to fake outgoing messages by foreign JIDs
+var MessageOutgoingPermissionVersion = 0
 
 // SendMessage creates and sends a message stanza
-func SendMessage(to string, from string, body string, id string, component *xmpp.Component, reply *Reply, isOutgoing bool, nick string) {
-	sendMessageWrapper(to, from, body, id, component, reply, "", isOutgoing, nick)
+func SendMessage(to string, from string, body string, id string, component *xmpp.Component, reply *Reply, replaceId string, isCarbon, requestReceipt bool) {
+	sendMessageWrapper(to, from, body, id, component, reply, nil, "", replaceId, isCarbon, requestReceipt)
 }
 
 // SendServiceMessage creates and sends a simple message stanza from transport
 func SendServiceMessage(to string, body string, component *xmpp.Component) {
-	sendMessageWrapper(to, "", body, "", component, nil, "", false, "")
+	var id string
+	if uuid, err := uuid.NewRandom(); err == nil {
+		id = uuid.String()
+	}
+	sendMessageWrapper(to, "", body, id, component, nil, nil, "", "", false, false)
 }
 
 // SendTextMessage creates and sends a simple message stanza
 func SendTextMessage(to string, from string, body string, component *xmpp.Component) {
-	sendMessageWrapper(to, from, body, "", component, nil, "", false, "")
+	var id string
+	if uuid, err := uuid.NewRandom(); err == nil {
+		id = uuid.String()
+	}
+	sendMessageWrapper(to, from, body, id, component, nil, nil, "", "", false, false)
 }
 
 // SendMessageWithOOB creates and sends a message stanza with OOB URL
-func SendMessageWithOOB(to string, from string, body string, id string, component *xmpp.Component, reply *Reply, oob string, isOutgoing bool, nick string) {
-	sendMessageWrapper(to, from, body, id, component, reply, oob, isOutgoing, nick)
+func SendMessageWithOOB(to string, from string, body string, id string, component *xmpp.Component, reply *Reply, oob, replaceId string, isCarbon, requestReceipt bool) {
+	sendMessageWrapper(to, from, body, id, component, reply, nil, oob, replaceId, isCarbon, requestReceipt)
 }
 
-func sendMessageWrapper(to string, from string, body string, id string, component *xmpp.Component, reply *Reply, oob string, isOutgoing bool, nick string) {
+// SendMessageMarker creates and sends a message stanza with a XEP-0333 marker
+func SendMessageMarker(to string, from string, component *xmpp.Component, markerType MarkerType, markerId string) {
+	sendMessageWrapper(to, from, "", "", component, nil, &marker{
+		Type: markerType,
+		Id:   markerId,
+	}, "", "", false, false)
+}
+
+func sendMessageWrapper(to string, from string, body string, id string, component *xmpp.Component, reply *Reply, marker *marker, oob, replaceId string, isCarbon, requestReceipt bool) {
 	toJid, err := stanza.NewJid(to)
 	if err != nil {
 		log.WithFields(log.Fields{
@@ -83,7 +113,7 @@ func sendMessageWrapper(to string, from string, body string, id string, componen
 		logFrom = from
 		messageFrom = from + "@" + componentJid
 	}
-	if isOutgoing {
+	if isCarbon {
 		messageTo = messageFrom
 		messageFrom = bareTo + "/" + Jid.Resource
 	} else {
@@ -119,13 +149,25 @@ func sendMessageWrapper(to string, from string, body string, id string, componen
 			message.Extensions = append(message.Extensions, extensions.NewReplyFallback(reply.Start, reply.End))
 		}
 	}
-	if nick != "" {
-		message.Extensions = append(message.Extensions, extensions.NickExtension{
-			Text: nick,
-		})
+	if marker != nil {
+		if marker.Type == MarkerTypeReceived {
+			message.Extensions = append(message.Extensions, stanza.MarkReceived{ID: marker.Id})
+		} else if marker.Type == MarkerTypeDisplayed {
+			message.Extensions = append(message.Extensions, stanza.MarkDisplayed{ID: marker.Id})
+			message.Extensions = append(message.Extensions, stanza.ReceiptReceived{ID: marker.Id})
+		}
+	}
+	if !isCarbon && toJid.Resource != "" {
+		message.Extensions = append(message.Extensions, stanza.HintNoCopy{})
+	}
+	if requestReceipt {
+		message.Extensions = append(message.Extensions, stanza.Markable{})
+	}
+	if replaceId != "" {
+		message.Extensions = append(message.Extensions, extensions.Replace{Id: replaceId})
 	}
 
-	if isOutgoing {
+	if isCarbon {
 		carbonMessage := extensions.ClientMessage{
 			Attrs: stanza.Attrs{
 				From: bareTo,
@@ -144,11 +186,19 @@ func sendMessageWrapper(to string, from string, body string, id string, componen
 				To:   toJid.Domain,
 			},
 		}
-		privilegeMessage.Extensions = append(privilegeMessage.Extensions, extensions.ComponentPrivilege{
+		if MessageOutgoingPermissionVersion == 2 {
+			privilegeMessage.Extensions = append(privilegeMessage.Extensions, extensions.ComponentPrivilege2{
 				Forwarded: stanza.Forwarded{
 					Stanza: carbonMessage,
 				},
 			})
+		} else {
+			privilegeMessage.Extensions = append(privilegeMessage.Extensions, extensions.ComponentPrivilege1{
+				Forwarded: stanza.Forwarded{
+					Stanza: carbonMessage,
+				},
+			})
+		}
 		sendMessage(&privilegeMessage, component)
 	} else {
 		sendMessage(&message, component)
@@ -274,7 +324,7 @@ func newPresence(bareJid string, to string, args ...args.V) stanza.Presence {
 	if SPNickname.IsSet(args) {
 		nickname := SPNickname.Get(args)
 		if nickname != "" {
-			presence.Extensions = append(presence.Extensions, extensions.NickExtension{
+			presence.Extensions = append(presence.Extensions, extensions.PresenceNickExtension{
 				Text: nickname,
 			})
 		}
@@ -337,6 +387,20 @@ func SendPresence(component *xmpp.Component, to string, args ...args.V) error {
 	return nil
 }
 
+// SPAppendFrom appends numeric from and resource to varargs
+func SPAppendFrom(oldArgs []args.V, id int64) []args.V {
+	newArgs := append(oldArgs, SPFrom(strconv.FormatInt(id, 10)))
+	newArgs = append(newArgs, SPResource(Jid.Resource))
+	return newArgs
+}
+
+// SimplePresence crafts simple presence varargs
+func SimplePresence(from int64, typ string) []args.V {
+	args := []args.V{SPType(typ)}
+	args = SPAppendFrom(args, from)
+	return args
+}
+
 // ResumableSend tries to resume the connection once and sends the packet again
 func ResumableSend(component *xmpp.Component, packet stanza.Packet) error {
 	err := component.Send(packet)
@@ -354,6 +418,12 @@ func ResumableSend(component *xmpp.Component, packet stanza.Packet) error {
 	return err
 }
 
+// SubscribeToTransport ensures a two-way subscription to the transport
+func SubscribeToTransport(component *xmpp.Component, jid string) {
+	SendPresence(component, jid, SPType("subscribe"))
+	SendPresence(component, jid, SPType("subscribed"))
+}
+
 // SplitJID tokenizes a JID string to bare JID and resource
 func SplitJID(from string) (string, string, bool) {
 	fromJid, err := stanza.NewJid(from)

xmpp/handlers.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/base64"
 	"encoding/xml"
+	"fmt"
 	"github.com/pkg/errors"
 	"io"
 	"strconv"
@@ -15,6 +16,7 @@ import (
 	"dev.narayana.im/narayana/telegabber/xmpp/gateway"
 
 	log "github.com/sirupsen/logrus"
+	"github.com/soheilhy/args"
 	"gosrc.io/xmpp"
 	"gosrc.io/xmpp/stanza"
 )
@@ -56,6 +58,22 @@ func HandleIq(s xmpp.Sender, p stanza.Packet) {
 			go handleGetDiscoInfo(s, iq)
 			return
 		}
+		_, ok = iq.Payload.(*stanza.DiscoItems)
+		if ok {
+			go handleGetDiscoItems(s, iq)
+			return
+		}
+		_, ok = iq.Payload.(*extensions.QueryRegister)
+		if ok {
+			go handleGetQueryRegister(s, iq)
+			return
+		}
+	} else if iq.Type == "set" {
+		query, ok := iq.Payload.(*extensions.QueryRegister)
+		if ok {
+			go handleSetQueryRegister(s, iq, query)
+			return
+		}
 	}
 }
 
@@ -90,8 +108,7 @@ func HandleMessage(s xmpp.Sender, p stanza.Packet) {
 		session, ok := sessions[bare]
 		if !ok {
 			if msg.To == gatewayJid {
-				gateway.SendPresence(component, msg.From, gateway.SPType("subscribe"))
-				gateway.SendPresence(component, msg.From, gateway.SPType("subscribed"))
+				gateway.SubscribeToTransport(component, msg.From)
 			} else {
 				log.Error("Message from stranger")
 			}
@@ -148,7 +165,12 @@ func HandleMessage(s xmpp.Sender, p stanza.Packet) {
 							"end": body.End,
 						}).Warn(errors.Wrap(err, "Failed to parse fallback end!"))
 					}
-					text = text[:start] + text[end:]
+
+					fullRunes := []rune(text)
+					cutRunes := make([]rune, 0, len(text)-int(end-start))
+					cutRunes = append(cutRunes, fullRunes[:start]...)
+					cutRunes = append(cutRunes, fullRunes[end:]...)
+					text = string(cutRunes)
 				}
 			}
 			var replaceId int64
@@ -167,6 +189,8 @@ func HandleMessage(s xmpp.Sender, p stanza.Packet) {
 				}
 			}
 
+			session.SendMessageLock.Lock()
+			defer session.SendMessageLock.Unlock()
 			tgMessageId := session.ProcessOutgoingMessage(toID, text, msg.From, replyId, replaceId)
 			if tgMessageId != 0 {
 				if replaceId != 0 {
@@ -175,9 +199,13 @@ func HandleMessage(s xmpp.Sender, p stanza.Packet) {
 					if err != nil {
 						log.Errorf("Failed to replace id %v with %v %v", replace.Id, msg.Id, tgMessageId)
 					} */
+					session.AddToEditOutbox(replace.Id, resource)
 				} else {
 					err = gateway.IdsDB.Set(session.Session.Login, bare, toID, tgMessageId, msg.Id)
-					if err != nil {
+					if err == nil {
+						// session.AddToOutbox(msg.Id, resource)
+						session.UpdateLastChatMessageId(toID, msg.Id)
+					} else {
 						log.Errorf("Failed to save ids %v/%v %v", toID, tgMessageId, msg.Id)
 					}
 				}
@@ -206,16 +234,51 @@ func HandleMessage(s xmpp.Sender, p stanza.Packet) {
 	}
 
 	if msg.Body == "" {
-		var privilege extensions.ComponentPrivilege
-		if ok := msg.Get(&privilege); ok {
-			log.Debugf("privilege: %#v", privilege)
+		var privilege1 extensions.ComponentPrivilege1
+		if ok := msg.Get(&privilege1); ok {
+			log.Debugf("privilege1: %#v", privilege1)
 		}
 
-		for _, perm := range privilege.Perms {
+		for _, perm := range privilege1.Perms {
 			if perm.Access == "message" && perm.Type == "outgoing" {
-				gateway.MessageOutgoingPermission = true
+				gateway.MessageOutgoingPermissionVersion = 1
 			}
 		}
+
+		var privilege2 extensions.ComponentPrivilege2
+		if ok := msg.Get(&privilege2); ok {
+			log.Debugf("privilege2: %#v", privilege2)
+		}
+
+		for _, perm := range privilege2.Perms {
+			if perm.Access == "message" && perm.Type == "outgoing" {
+				gateway.MessageOutgoingPermissionVersion = 2
+			}
+		}
+
+		var displayed stanza.MarkDisplayed
+		msg.Get(&displayed)
+		if displayed.ID != "" {
+			log.Debugf("displayed: %#v", displayed)
+
+			bare, _, ok := gateway.SplitJID(msg.From)
+			if !ok {
+				return
+			}
+			session, ok := sessions[bare]
+			if !ok {
+				return
+			}
+			toID, ok := toToID(msg.To)
+			if !ok {
+				return
+			}
+			msgId, err := strconv.ParseInt(displayed.ID, 10, 64)
+			if err == nil {
+				session.MarkAsRead(toID, msgId)
+			}
+			return
+		}
 	}
 
 	if msg.Type == "error" {
@@ -335,13 +398,21 @@ func handlePresence(s xmpp.Sender, p stanza.Presence) {
 				log.Error(errors.Wrap(err, "TDlib connection failure"))
 			} else {
 				for status := range session.StatusesRange() {
+					show, description, typ := status.Destruct()
+					newArgs := []args.V{
+						gateway.SPImmed(false),
+					}
+					if typ != "" {
+						newArgs = append(newArgs, gateway.SPType(typ))
+					}
 					go session.ProcessStatusUpdate(
 						status.ID,
-						status.Description,
-						status.XMPP,
-						gateway.SPImmed(false),
+						description,
+						show,
+						newArgs...,
 					)
 				}
+				session.UpdateChatNicknames()
 			}
 		}()
 	}
@@ -414,8 +485,11 @@ func handleGetDiscoInfo(s xmpp.Sender, iq *stanza.IQ) {
 	_, ok := toToID(iq.To)
 	if ok {
 		disco.AddIdentity("", "account", "registered")
+		disco.AddFeatures(stanza.NSMsgChatMarkers)
+		disco.AddFeatures(stanza.NSMsgReceipts)
 	} else {
 		disco.AddIdentity("Telegram Gateway", "gateway", "telegram")
+		disco.AddFeatures("jabber:iq:register")
 	}
 	answer.Payload = disco
 
@@ -430,6 +504,189 @@ func handleGetDiscoInfo(s xmpp.Sender, iq *stanza.IQ) {
 	_ = gateway.ResumableSend(component, answer)
 }
 
+func handleGetDiscoItems(s xmpp.Sender, iq *stanza.IQ) {
+	answer, err := stanza.NewIQ(stanza.Attrs{
+		Type: stanza.IQTypeResult,
+		From: iq.To,
+		To:   iq.From,
+		Id:   iq.Id,
+		Lang: "en",
+	})
+	if err != nil {
+		log.Errorf("Failed to create answer IQ: %v", err)
+		return
+	}
+
+	answer.Payload = answer.DiscoItems()
+
+	component, ok := s.(*xmpp.Component)
+	if !ok {
+		log.Error("Not a component")
+		return
+	}
+
+	_ = gateway.ResumableSend(component, answer)
+}
+
+func handleGetQueryRegister(s xmpp.Sender, iq *stanza.IQ) {
+	component, ok := s.(*xmpp.Component)
+	if !ok {
+		log.Error("Not a component")
+		return
+	}
+
+	answer, err := stanza.NewIQ(stanza.Attrs{
+		Type: stanza.IQTypeResult,
+		From: iq.To,
+		To:   iq.From,
+		Id:   iq.Id,
+		Lang: "en",
+	})
+	if err != nil {
+		log.Errorf("Failed to create answer IQ: %v", err)
+		return
+	}
+
+	var login string
+	bare, _, ok := gateway.SplitJID(iq.From)
+	if ok {
+		session, ok := sessions[bare]
+		if ok {
+			login = session.Session.Login
+		}
+	}
+
+	var query stanza.IQPayload
+	if login == "" {
+		query = extensions.QueryRegister{
+			Instructions: fmt.Sprintf("Authorization in Telegram is a multi-step process, so please accept %v to your contacts and follow further instructions (provide the authentication code there, etc.).\nFor now, please provide your login.", iq.To),
+		}
+	} else {
+		query = extensions.QueryRegister{
+			Instructions: "Already logged in",
+			Username:     login,
+			Registered:   &extensions.QueryRegisterRegistered{},
+		}
+	}
+	answer.Payload = query
+
+	log.Debugf("%#v", query)
+
+	_ = gateway.ResumableSend(component, answer)
+
+	if login == "" {
+		gateway.SubscribeToTransport(component, iq.From)
+	}
+}
+
+func handleSetQueryRegister(s xmpp.Sender, iq *stanza.IQ, query *extensions.QueryRegister) {
+	component, ok := s.(*xmpp.Component)
+	if !ok {
+		log.Error("Not a component")
+		return
+	}
+
+	answer, err := stanza.NewIQ(stanza.Attrs{
+		Type: stanza.IQTypeResult,
+		From: iq.To,
+		To:   iq.From,
+		Id:   iq.Id,
+		Lang: "en",
+	})
+	if err != nil {
+		log.Errorf("Failed to create answer IQ: %v", err)
+		return
+	}
+
+	defer gateway.ResumableSend(component, answer)
+
+	if query.Remove != nil {
+		iqAnswerSetError(answer, query, 405)
+		return
+	}
+
+	var login string
+	var session *telegram.Client
+	bare, resource, ok := gateway.SplitJID(iq.From)
+	if ok {
+		session, ok = sessions[bare]
+		if ok {
+			login = session.Session.Login
+		}
+	}
+
+	if login == "" {
+		if !ok {
+			session, ok = getTelegramInstance(bare, &persistence.Session{}, component)
+			if !ok {
+				iqAnswerSetError(answer, query, 500)
+				return
+			}
+		}
+
+		err := session.TryLogin(resource, query.Username)
+		if err != nil {
+			if err.Error() == telegram.TelegramAuthDone {
+				iqAnswerSetError(answer, query, 406)
+			} else {
+				iqAnswerSetError(answer, query, 500)
+			}
+			return
+		}
+
+		err = session.SetPhoneNumber(query.Username)
+		if err != nil {
+			iqAnswerSetError(answer, query, 500)
+			return
+		}
+
+		// everything okay, the response should be empty with no payload/error at this point
+		gateway.SubscribeToTransport(component, iq.From)
+	} else {
+		iqAnswerSetError(answer, query, 406)
+	}
+}
+
+func iqAnswerSetError(answer *stanza.IQ, payload *extensions.QueryRegister, code int) {
+	answer.Type = stanza.IQTypeError
+	answer.Payload = *payload
+	switch code {
+	case 400:
+		answer.Error = &stanza.Err{
+			Code:   code,
+			Type:   stanza.ErrorTypeModify,
+			Reason: "bad-request",
+		}
+	case 405:
+		answer.Error = &stanza.Err{
+			Code:   code,
+			Type:   stanza.ErrorTypeCancel,
+			Reason: "not-allowed",
+			Text:   "Logging out is dangerous. If you are sure you would be able to receive the authentication code again, issue the /logout command to the transport",
+		}
+	case 406:
+		answer.Error = &stanza.Err{
+			Code:   code,
+			Type:   stanza.ErrorTypeModify,
+			Reason: "not-acceptable",
+			Text:   "Phone number already provided, chat with the transport for further instruction",
+		}
+	case 500:
+		answer.Error = &stanza.Err{
+			Code:   code,
+			Type:   stanza.ErrorTypeWait,
+			Reason: "internal-server-error",
+		}
+	default:
+		log.Error("Unknown error code, falling back with empty reason")
+		answer.Error = &stanza.Err{
+			Code:   code,
+			Type:   stanza.ErrorTypeCancel,
+			Reason: "undefined-condition",
+		}
+	}
+}
+
 func toToID(to string) (int64, bool) {
 	toParts := strings.Split(to, "@")
 	if len(toParts) < 2 {
@@ -476,7 +733,7 @@ func makeVCardPayload(typ byte, id string, info telegram.VCardInfo, session *tel
 			vcard.Photo.Type.Text = "image/jpeg"
 			vcard.Photo.Binval.Text = base64Photo
 		}
-		vcard.Nickname.Text = info.Nickname
+		vcard.Nickname.Text = strings.Join(info.Nicknames, ",")
 		vcard.N.Given.Text = info.Given
 		vcard.N.Family.Text = info.Family
 		vcard.Tel.Number.Text = info.Tel
@@ -507,13 +764,13 @@ func makeVCardPayload(typ byte, id string, info telegram.VCardInfo, session *tel
 				},
 			})
 		}
-		if info.Nickname != "" {
+		for _, nickname := range info.Nicknames {
 			nodes = append(nodes, stanza.Node{
 				XMLName: xml.Name{Local: "nickname"},
 				Nodes: []stanza.Node{
 					stanza.Node{
 						XMLName: xml.Name{Local: "text"},
-						Content: info.Nickname,
+						Content: nickname,
 					},
 				},
 			}, stanza.Node{
@@ -521,7 +778,7 @@ func makeVCardPayload(typ byte, id string, info telegram.VCardInfo, session *tel
 				Nodes: []stanza.Node{
 					stanza.Node{
 						XMLName: xml.Name{Local: "uri"},
-						Content: "https://t.me/" + info.Nickname,
+						Content: "https://t.me/" + nickname,
 					},
 				},
 			})