Support nativeedits for rawmessages=false

.gitignore

@@ -4,3 +4,4 @@ sessions/
 session.dat
 session.dat.new
 release/
+tdlib/

Dockerfile

@@ -29,7 +29,7 @@ WORKDIR /src
 RUN make ${MAKEOPTS}
 
 FROM scratch AS telegabber
-COPY --from=build /src/telegabber /usr/local/bin/
+COPY --from=build /src/release/telegabber /usr/local/bin/
 ENTRYPOINT ["/usr/local/bin/telegabber"]
 
 FROM scratch AS binaries

Makefile

@@ -1,12 +1,13 @@
 .PHONY: all test
 
 COMMIT := $(shell git rev-parse --short HEAD)
-TD_COMMIT := "8517026415e75a8eec567774072cbbbbb52376c1"
-VERSION := "v1.8.2"
+TD_COMMIT := "5bbfc1cf5dab94f82e02f3430ded7241d4653551"
+VERSION := "v1.9.3"
 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
@@ -16,3 +17,9 @@ lint:
 
 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

@@ -34,4 +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 v0.0.0-20230730021136-47da33180615
+replace github.com/zelenin/go-tdlib => dev.narayana.im/narayana/go-tdlib v0.0.0-20240124222245-b4c12addb061

go.sum

@@ -1,6 +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

@@ -42,6 +42,8 @@ type Session struct {
 	OOBMode     bool   `yaml:":oobmode"`
 	Carbons     bool   `yaml:":carbons"`
 	HideIds     bool   `yaml:":hideids"`
+	Receipts    bool   `yaml:":receipts"`
+	NativeEdits bool   `yaml:":nativeedits"`
 }
 
 var configKeys = []string{
@@ -52,6 +54,8 @@ var configKeys = []string{
 	"oobmode",
 	"carbons",
 	"hideids",
+	"receipts",
+	"nativeedits",
 }
 
 var sessionDB *SessionsYamlDB
@@ -130,6 +134,10 @@ 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")
@@ -194,6 +202,20 @@ 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")

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)

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 = "1.8.2"
+var version string = "1.9.3"
 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/client.go

@@ -16,25 +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
@@ -53,15 +34,18 @@ type Client struct {
 	jid       string
 	Session   *persistence.Session
 	resources map[string]bool
-	outbox    map[string]string
 	content   *config.TelegramContentConfig
 	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
@@ -73,7 +57,9 @@ type clientLocks struct {
 	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
@@ -83,10 +69,6 @@ type clientLocks struct {
 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,
@@ -132,12 +114,14 @@ func NewClient(conf config.TelegramConfig, jid string, component *xmpp.Component
 		jid:             jid,
 		Session:         session,
 		resources:       make(map[string]bool),
-		outbox:          make(map[string]string),
 		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

@@ -185,18 +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,
@@ -205,6 +201,8 @@ func (c *Client) sendMessagesReverse(chatID int64, messages []*client.Message) {
 			strconv.FormatInt(message.Id, 10),
 			c.xmpp,
 			reply,
+			"",
+			false,
 			false,
 		)
 	}
@@ -281,16 +279,15 @@ func (c *Client) ProcessTransportCommand(cmdline string, resource string) string
 			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":
@@ -383,6 +380,7 @@ func (c *Client) ProcessTransportCommand(cmdline string, resource string) string
 		}
 	case "config":
 		if len(args) > 1 {
+			var msg string
 			if gateway.MessageOutgoingPermissionVersion == 0 && args[0] == "carbons" && args[1] == "true" {
 				return "The server did not allow to enable carbons"
 			}
@@ -393,7 +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 {
@@ -422,7 +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 {
@@ -710,18 +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

telegram/connect.go

@@ -2,7 +2,6 @@ package telegram
 
 import (
 	"github.com/pkg/errors"
-	"strconv"
 	"time"
 
 	"dev.narayana.im/narayana/telegabber/xmpp/gateway"
@@ -69,10 +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
@@ -159,7 +158,7 @@ func (c *Client) Connect(resource string) error {
 		}
 
 		gateway.SubscribeToTransport(c.xmpp, c.jid)
-		gateway.SendPresence(c.xmpp, c.jid, gateway.SPStatus("Logged in as: "+c.Session.Login))
+		c.sendPresence(gateway.SPStatus("Logged in as: " + c.Session.Login))
 	}()
 
 	return nil
@@ -228,12 +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()

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,
+		},
+	}
+}
+
+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) (*Insertion, *Insertion) {
+// 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
+	}
+
+	doubledRunes := textToDoubledRunes(sourceText)
 
-	startStack := make(InsertionStack, 0, len(sourceText))
-	endStack := make(InsertionStack, 0, len(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
@@ -211,6 +242,8 @@ func (c *Client) updateNewMessage(update *client.UpdateNewMessage) {
 		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 &&
@@ -223,8 +256,6 @@ func (c *Client) updateNewMessage(update *client.UpdateNewMessage) {
 		}).Warn("New message from chat")
 
 		c.ProcessIncomingMessage(chatId, update.Message)
-
-		c.updateLastMessageHash(update.Message.ChatId, update.Message.Id, update.Message.Content)
 	}()
 }
 
@@ -234,12 +265,18 @@ func (c *Client) updateMessageContent(update *client.UpdateMessageContent) {
 
 	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, err := gateway.IdsDB.GetByTgIds(c.Session.Login, c.jid, update.ChatId, update.MessageId)
+
+	xmppId, xmppIdErr := gateway.IdsDB.GetByTgIds(c.Session.Login, c.jid, update.ChatId, update.MessageId)
 	var ignoredResource string
-	if err == nil {
-		ignoredResource = c.popFromOutbox(xmppId)
+	if xmppIdErr == nil {
+		ignoredResource = c.popFromEditOutbox(xmppId)
 	} else {
 		log.Infof("Couldn't retrieve XMPP message ids for %v, an echo may happen", update.MessageId)
 	}
@@ -253,19 +290,62 @@ func (c *Client) updateMessageContent(update *client.UpdateMessageContent) {
 
 	if update.NewContent.MessageContentType() == client.TypeMessageText && c.hasLastMessageHashChanged(update.ChatId, update.MessageId, update.NewContent) {
 		textContent := update.NewContent.(*client.MessageText)
-		var editChar string
-		if c.Session.AsciiArrows {
-			editChar = "e "
+		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 {
-			editChar = "✎ "
+			log.Errorf("No message %v/%v found, cannot reliably determine if it's a carbon", update.ChatId, update.MessageId)
 		}
-		text := editChar + fmt.Sprintf("%v | %s", update.MessageId, formatter.Format(
+
+		var text strings.Builder
+
+		if replaceId == "" {
+			var editChar string
+			if c.Session.AsciiArrows {
+				editChar = "e"
+			} else {
+				editChar = "✎"
+			}
+			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,
 		))
+
+		sChatId := strconv.FormatInt(update.ChatId, 10)
 		for _, jid := range jids {
-			gateway.SendMessage(jid, strconv.FormatInt(update.ChatId, 10), text, "e"+strconv.FormatInt(update.MessageId, 10), c.xmpp, nil, false)
+			gateway.SendMessage(jid, sChatId, text.String(), "e"+sId, c.xmpp, nil, replaceId, isCarbon, false)
 		}
 	}
 }
@@ -294,19 +374,25 @@ 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)
@@ -328,3 +414,7 @@ func (c *Client) updateChatTitle(update *client.UpdateChatTitle) {
 		chat.Title = update.Title
 	}
 }
+
+func (c *Client) updateChatReadOutbox(update *client.UpdateChatReadOutbox) {
+	c.sendMarker(update.ChatId, update.LastReadOutboxMessageId, gateway.MarkerTypeDisplayed)
+}

telegram/utils.go

@@ -16,6 +16,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unicode/utf8"
 
 	"dev.narayana.im/narayana/telegabber/telegram/cache"
 	"dev.narayana.im/narayana/telegabber/telegram/formatter"
@@ -36,13 +37,21 @@ type VCardInfo struct {
 	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) {
@@ -272,22 +281,17 @@ func (c *Client) ProcessStatusUpdate(chatID int64, status string, show string, o
 	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 {
@@ -341,25 +345,74 @@ 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{
-			ChatId:    message.ChatId,
-			MessageId: message.ReplyToMessageId,
-		})
-		if err != nil {
-			log.Errorf("<error fetching message: %s>", err.Error())
-			return
-		}
+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,
+		Sender:    c.formatSender(message),
+		Date:      message.Date,
+		Text:      text,
+	}
+}
 
-		replyId, err := gateway.IdsDB.GetByTgIds(c.Session.Login, c.jid, message.ChatId, message.ReplyToMessageId)
-		if err != nil {
-			replyId = strconv.FormatInt(message.ReplyToMessageId, 10)
-		}
-		reply = &gateway.Reply{
-			Author: fmt.Sprintf("%v@%s", c.getSenderId(replyMsg), gateway.Jid.Full()),
-			Id:     replyId,
+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
+			}
+
+			if !noContent {
+				tgReply = c.messageToStub(replyMsg, preview, text)
+			}
+
+			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,
+			}
 		}
 	}
 
@@ -382,9 +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(
@@ -395,10 +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)
@@ -415,33 +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) {
@@ -587,20 +644,24 @@ func (c *Client) messageToText(message *client.Message, preview bool) string {
 		return "<empty message>"
 	}
 
-	markupFunction := c.getFormatter()
-	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 {
@@ -609,19 +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 {
@@ -633,86 +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 {
@@ -730,10 +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
@@ -759,7 +820,7 @@ func (c *Client) messageToText(message *client.Message, preview bool) string {
 			return strings.Join(rows, "\n")
 		}
 	case client.TypeMessageChatSetMessageAutoDeleteTime:
-		ttl, _ := message.Content.(*client.MessageChatSetMessageAutoDeleteTime)
+		ttl, _ := content.(*client.MessageChatSetMessageAutoDeleteTime)
 		name := c.formatContact(ttl.FromUserId)
 		if name == "" {
 			if ttl.MessageAutoDeleteTime == 0 {
@@ -776,7 +837,7 @@ func (c *Client) messageToText(message *client.Message, preview bool) string {
 		}
 	}
 
-	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) {
@@ -845,21 +906,23 @@ 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)
 	}
-	isCarbonsEnabled := gateway.MessageOutgoingPermissionVersion > 0 && c.Session.Carbons
 	// with carbons, hide for all messages in PM and only for outgoing in group chats
-	hideSender := isCarbonsEnabled && (message.IsOutgoing || isPM)
+	hideSender := c.isCarbonsEnabled() && (message.IsOutgoing || isPM)
 
-	var replyStart, replyEnd int
 	prefix := []string{}
 	// message direction
 	var directionChar string
@@ -888,20 +951,39 @@ func (c *Client) messageToPrefix(message *client.Message, previewString string,
 			prefix = append(prefix, sender)
 		}
 	}
+
 	// reply to
-	if message.ReplyToMessageId != 0 {
-		if len(prefix) > 0 {
-			replyStart = c.countCharsInLines(&prefix) + (len(prefix)-1)*len(messageHeaderSeparator)
-		}
-		replyLine := "reply: " + c.formatMessage(message.ChatId, message.ReplyToMessageId, true, replyMsg)
-		prefix = append(prefix, replyLine)
-		replyEnd = replyStart + len(replyLine)
-		if len(prefix) > 0 {
-			replyEnd += len(messageHeaderSeparator)
+	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.formatMessageContent(preview, tgReply)
+			prefix = append(prefix, 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 != "" {
@@ -912,7 +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 {
@@ -931,14 +1013,25 @@ 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) {
-	isCarbon := gateway.MessageOutgoingPermissionVersion > 0 && c.Session.Carbons && message.IsOutgoing
+	isCarbon := c.isCarbonsEnabled() && message.IsOutgoing
 	jids := c.getCarbonFullJids(isCarbon, "")
 
 	var text, oob, auxText string
-
-	reply, replyMsg := c.getMessageReply(message)
+	var reply *gateway.Reply
+	var replyObtained bool
 
 	content := message.Content
 	if content != nil && content.MessageContentType() == client.TypeMessageChatChangePhoto {
@@ -974,47 +1067,50 @@ func (c *Client) ProcessIncomingMessage(chatId int64, message *client.Message) {
 			} else if !c.Session.RawMessages {
 				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 !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)
 
 	for _, jid := range jids {
-		gateway.SendMessageWithOOB(jid, sChatId, text, sId, c.xmpp, reply, oob, isCarbon)
+		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)
+			gateway.SendMessage(jid, sChatId, auxText, sId, c.xmpp, reply, "", isCarbon, c.Session.Receipts)
 		}
 	}
+	c.UpdateLastChatMessageId(chatId, sId)
+}
+
+// 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
@@ -1115,7 +1211,7 @@ 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 {
@@ -1212,7 +1308,7 @@ 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)
 }
@@ -1313,9 +1409,7 @@ 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)
@@ -1326,11 +1420,11 @@ 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) {
@@ -1379,9 +1473,9 @@ func (c *Client) UpdateChatNicknames() {
 		chat, ok := c.cache.GetChat(id)
 		if ok {
 			newArgs := []args.V{
-				gateway.SPFrom(strconv.FormatInt(id, 10)),
 				gateway.SPNickname(chat.Title),
 			}
+			newArgs = gateway.SPAppendFrom(newArgs, id)
 
 			cachedStatus, ok := c.cache.GetStatus(id)
 			if ok {
@@ -1392,17 +1486,34 @@ func (c *Client) UpdateChatNicknames() {
 				}
 			}
 
-			gateway.SendPresence(
-				c.xmpp,
-				c.jid,
-				newArgs...,
-			)
+			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()
@@ -1411,14 +1522,12 @@ func (c *Client) AddToOutbox(xmppId, resource string) {
 	c.outbox[xmppId] = resource
 }
 
-func (c *Client) popFromOutbox(xmppId string) string {
+func (c *Client) getFromOutbox(xmppId string) string {
 	c.locks.outboxLock.Lock()
 	defer c.locks.outboxLock.Unlock()
 
 	resource, ok := c.outbox[xmppId]
-	if ok {
-		delete(c.outbox, xmppId)
-	} else {
+	if !ok {
 		log.Warnf("No %v xmppId in outbox", xmppId)
 	}
 	return resource
@@ -1493,8 +1602,23 @@ func (c *Client) hasLastMessageHashChanged(chatId, messageId int64, content clie
 	return !ok || oldHash != newHash
 }
 
-func (c *Client) getFormatter() func(*client.TextEntity) (*formatter.Insertion, *formatter.Insertion) {
-	return formatter.EntityToXEP0393
+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 {

telegram/utils_test.go

@@ -431,20 +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)
 	}
 }
 
@@ -452,20 +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)
 	}
 }
 
@@ -473,20 +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)
 	}
 }
 
@@ -495,15 +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)
 	}
 }
 
@@ -511,46 +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,
-		IsOutgoing:       true,
-		ReplyToMessageId: 42,
+		Id:         23,
+		ChatId:     25,
+		IsOutgoing: true,
+		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,
-		Content: &client.MessageText{
-			Text: &client.FormattedText{
-				Text: "tist",
+	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)
+	}
+}
+
+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 replyEnd != 26 {
-		t.Errorf("Wrong replyEnd: %v", replyEnd)
+	if gatewayReply != nil {
+		t.Errorf("Reply is not nil: %v", gatewayReply)
 	}
 }
 

xmpp/gateway/gateway.go

@@ -3,6 +3,7 @@ package gateway
 import (
 	"encoding/xml"
 	"github.com/pkg/errors"
+	"strconv"
 	"strings"
 	"sync"
 
@@ -22,6 +23,18 @@ 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
@@ -42,26 +55,34 @@ var DirtySessions = false
 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, isCarbon bool) {
-	sendMessageWrapper(to, from, body, id, component, reply, "", isCarbon)
+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)
+	sendMessageWrapper(to, "", body, "", 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)
+	sendMessageWrapper(to, from, body, "", 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, isCarbon bool) {
-	sendMessageWrapper(to, from, body, id, component, reply, oob, isCarbon)
+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)
+}
+
+// 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, oob string, isCarbon bool) {
+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{
@@ -119,9 +140,23 @@ func sendMessageWrapper(to string, from string, body string, id string, componen
 			message.Extensions = append(message.Extensions, extensions.NewReplyFallback(reply.Start, reply.End))
 		}
 	}
+	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 isCarbon {
 		carbonMessage := extensions.ClientMessage{
@@ -343,6 +378,20 @@ 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)

xmpp/handlers.go

@@ -199,10 +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.AddToOutbox(replace.Id, resource)
+					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)
 					}
 				}
@@ -252,6 +255,30 @@ func HandleMessage(s xmpp.Sender, p stanza.Packet) {
 				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" {
@@ -458,6 +485,8 @@ 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")