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Send the display name instead of the user name (matrix) (#1282)

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* matrix: send the display name (the nickname in matrix parlance) instead of the user name

There is also the option UseUserName (already in use by the discord bridge) to turn back to the old behavior.

* matrix: update displayNames on join events

* matrix: introduce a helper.go file to keep matrix.go size reasonable
This commit is contained in:
Simon THOBY 2020-11-22 15:57:41 +01:00 committed by GitHub
parent 4cc2c914e6
commit 1a3c57a031
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4 changed files with 206 additions and 110 deletions
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2
bridge/config/config.go
View File

@ -154,7 +154,7 @@ type Protocol struct {
UseTLS bool // IRC
UseDiscriminator bool // discord
UseFirstName bool // telegram
UseUserName bool // discord
UseUserName bool // discord, matrix
UseInsecureURL bool // telegram
VerboseJoinPart bool // IRC
WebhookBindAddress string // mattermost, slack

166
bridge/matrix/helpers.go Normal file
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@ -0,0 +1,166 @@
package bmatrix
import (
"encoding/json"
"errors"
"html"
"strings"
"time"
matrix "github.com/matrix-org/gomatrix"
)
func newMatrixUsername(username string) *matrixUsername {
mUsername := new(matrixUsername)
// check if we have a </tag>. if we have, we don't escape HTML. #696
if htmlTag.MatchString(username) {
mUsername.formatted = username
// remove the HTML formatting for beautiful push messages #1188
mUsername.plain = htmlReplacementTag.ReplaceAllString(username, "")
} else {
mUsername.formatted = html.EscapeString(username)
mUsername.plain = username
}
return mUsername
}
// getRoomID retrieves a matching room ID from the channel name.
func (b *Bmatrix) getRoomID(channel string) string {
b.RLock()
defer b.RUnlock()
for ID, name := range b.RoomMap {
if name == channel {
return ID
}
}
return ""
}
// interface2Struct marshals and immediately unmarshals an interface.
// Useful for converting map[string]interface{} to a struct.
func interface2Struct(in interface{}, out interface{}) error {
jsonObj, err := json.Marshal(in)
if err != nil {
return err //nolint:wrapcheck
}
return json.Unmarshal(jsonObj, out)
}
// getDisplayName retrieves the displayName for mxid, querying the homserver if the mxid is not in the cache.
func (b *Bmatrix) getDisplayName(mxid string) string {
if b.GetBool("UseUserName") {
return mxid[1:]
}
b.RLock()
if val, present := b.NicknameMap[mxid]; present {
b.RUnlock()
return val.displayName
}
b.RUnlock()
displayName, err := b.mc.GetDisplayName(mxid)
var httpError *matrix.HTTPError
if errors.As(err, &httpError) {
b.Log.Warnf("Couldn't retrieve the display name for %s", mxid)
}
if err != nil {
return b.cacheDisplayName(mxid, mxid[1:])
}
return b.cacheDisplayName(mxid, displayName.DisplayName)
}
// cacheDisplayName stores the mapping between a mxid and a display name, to be reused later without performing a query to the homserver.
// Note that old entries are cleaned when this function is called.
func (b *Bmatrix) cacheDisplayName(mxid string, displayName string) string {
now := time.Now()
// scan to delete old entries, to stop memory usage from becoming too high with old entries
toDelete := []string{}
b.RLock()
for k, v := range b.NicknameMap {
if now.Sub(v.lastUpdated) > 10*time.Minute {
toDelete = append(toDelete, k)
}
}
b.RUnlock()
b.Lock()
for _, v := range toDelete {
delete(b.NicknameMap, v)
}
b.NicknameMap[mxid] = NicknameCacheEntry{
displayName: displayName,
lastUpdated: now,
}
b.Unlock()
return displayName
}
// handleError converts errors into httpError.
//nolint:exhaustivestruct
func handleError(err error) *httpError {
var mErr matrix.HTTPError
if !errors.As(err, &mErr) {
return &httpError{
Err: "not a HTTPError",
}
}
var httpErr httpError
if err := json.Unmarshal(mErr.Contents, &httpErr); err != nil {
return &httpError{
Err: "unmarshal failed",
}
}
return &httpErr
}
func (b *Bmatrix) containsAttachment(content map[string]interface{}) bool {
// Skip empty messages
if content["msgtype"] == nil {
return false
}
// Only allow image,video or file msgtypes
if !(content["msgtype"].(string) == "m.image" ||
content["msgtype"].(string) == "m.video" ||
content["msgtype"].(string) == "m.file") {
return false
}
return true
}
// getAvatarURL returns the avatar URL of the specified sender.
func (b *Bmatrix) getAvatarURL(sender string) string {
urlPath := b.mc.BuildURL("profile", sender, "avatar_url")
s := struct {
AvatarURL string `json:"avatar_url"`
}{}
err := b.mc.MakeRequest("GET", urlPath, nil, &s)
if err != nil {
b.Log.Errorf("getAvatarURL failed: %s", err)
return ""
}
url := strings.ReplaceAll(s.AvatarURL, "mxc://", b.GetString("Server")+"/_matrix/media/r0/thumbnail/")
if url != "" {
url += "?width=37&height=37&method=crop"
}
return url
}

139
bridge/matrix/matrix.go
View File

@ -2,9 +2,7 @@ package bmatrix
import (
"bytes"
"encoding/json"
"fmt"
"html"
"mime"
"regexp"
"strings"
@ -22,9 +20,15 @@ var (
htmlReplacementTag = regexp.MustCompile("<[^>]*>")
)
type NicknameCacheEntry struct {
displayName string
lastUpdated time.Time
}
type Bmatrix struct {
mc *matrix.Client
UserID string
NicknameMap map[string]NicknameCacheEntry
RoomMap map[string]string
sync.RWMutex
*bridge.Config
@ -41,25 +45,29 @@ type matrixUsername struct {
formatted string
}
func newMatrixUsername(username string) *matrixUsername {
mUsername := new(matrixUsername)
// SubTextMessage represents the new content of the message in edit messages.
type SubTextMessage struct {
MsgType string `json:"msgtype"`
Body string `json:"body"`
}
// check if we have a </tag>. if we have, we don't escape HTML. #696
if htmlTag.MatchString(username) {
mUsername.formatted = username
// remove the HTML formatting for beautiful push messages #1188
mUsername.plain = htmlReplacementTag.ReplaceAllString(username, "")
} else {
mUsername.formatted = html.EscapeString(username)
mUsername.plain = username
}
// MessageRelation explains how the current message relates to a previous message.
// Notably used for message edits.
type MessageRelation struct {
EventID string `json:"event_id"`
Type string `json:"rel_type"`
}
return mUsername
type EditedMessage struct {
NewContent SubTextMessage `json:"m.new_content"`
RelatedTo MessageRelation `json:"m.relates_to"`
matrix.TextMessage
}
func New(cfg *bridge.Config) bridge.Bridger {
b := &Bmatrix{Config: cfg}
b.RoomMap = make(map[string]string)
b.NicknameMap = make(map[string]NicknameCacheEntry)
return b
}
@ -112,22 +120,6 @@ retry:
return nil
}
type SubTextMessage struct {
MsgType string `json:"msgtype"`
Body string `json:"body"`
}
type MessageRelation struct {
EventID string `json:"event_id"`
Type string `json:"rel_type"`
}
type EditedMessage struct {
NewContent SubTextMessage `json:"m.new_content"`
RelatedTo MessageRelation `json:"m.relates_to"`
matrix.TextMessage
}
func (b *Bmatrix) Send(msg config.Message) (string, error) {
b.Log.Debugf("=> Receiving %#v", msg)
@ -233,21 +225,11 @@ func (b *Bmatrix) Send(msg config.Message) (string, error) {
return resp.EventID, err
}
func (b *Bmatrix) getRoomID(channel string) string {
b.RLock()
defer b.RUnlock()
for ID, name := range b.RoomMap {
if name == channel {
return ID
}
}
return ""
}
func (b *Bmatrix) handlematrix() {
syncer := b.mc.Syncer.(*matrix.DefaultSyncer)
syncer.OnEventType("m.room.redaction", b.handleEvent)
syncer.OnEventType("m.room.message", b.handleEvent)
syncer.OnEventType("m.room.member", b.handleMemberChange)
go func() {
for {
if err := b.mc.Sync(); err != nil {
@ -257,15 +239,6 @@ func (b *Bmatrix) handlematrix() {
}()
}
func interface2Struct(in interface{}, out interface{}) error {
jsonObj, err := json.Marshal(in)
if err != nil {
return err
}
return json.Unmarshal(jsonObj, out)
}
func (b *Bmatrix) handleEdit(ev *matrix.Event, rmsg config.Message) bool {
relationInterface, present := ev.Content["m.relates_to"]
newContentInterface, present2 := ev.Content["m.new_content"]
@ -296,6 +269,15 @@ func (b *Bmatrix) handleEdit(ev *matrix.Event, rmsg config.Message) bool {
return true
}
func (b *Bmatrix) handleMemberChange(ev *matrix.Event) {
// Update the displayname on join messages, according to https://matrix.org/docs/spec/client_server/r0.6.1#events-on-change-of-profile-information
if ev.Content["membership"] == "join" {
if dn, ok := ev.Content["displayname"].(string); ok {
b.cacheDisplayName(ev.Sender, dn)
}
}
}
func (b *Bmatrix) handleEvent(ev *matrix.Event) {
b.Log.Debugf("== Receiving event: %#v", ev)
if ev.Sender != b.UserID {
@ -309,7 +291,7 @@ func (b *Bmatrix) handleEvent(ev *matrix.Event) {
// Create our message
rmsg := config.Message{
Username: ev.Sender[1:],
Username: b.getDisplayName(ev.Sender),
Channel: channel,
Account: b.Account,
UserID: ev.Sender,
@ -494,58 +476,3 @@ func (b *Bmatrix) handleUploadFile(msg *config.Message, channel string, fi *conf
}
b.Log.Debugf("result: %#v", res)
}
// skipMessages returns true if this message should not be handled
func (b *Bmatrix) containsAttachment(content map[string]interface{}) bool {
// Skip empty messages
if content["msgtype"] == nil {
return false
}
// Only allow image,video or file msgtypes
if !(content["msgtype"].(string) == "m.image" ||
content["msgtype"].(string) == "m.video" ||
content["msgtype"].(string) == "m.file") {
return false
}
return true
}
// getAvatarURL returns the avatar URL of the specified sender
func (b *Bmatrix) getAvatarURL(sender string) string {
urlPath := b.mc.BuildURL("profile", sender, "avatar_url")
s := struct {
AvatarURL string `json:"avatar_url"`
}{}
err := b.mc.MakeRequest("GET", urlPath, nil, &s)
if err != nil {
b.Log.Errorf("getAvatarURL failed: %s", err)
return ""
}
url := strings.ReplaceAll(s.AvatarURL, "mxc://", b.GetString("Server")+"/_matrix/media/r0/thumbnail/")
if url != "" {
url += "?width=37&height=37&method=crop"
}
return url
}
func handleError(err error) *httpError {
mErr, ok := err.(matrix.HTTPError)
if !ok {
return &httpError{
Err: "not a HTTPError",
}
}
var httpErr httpError
if err := json.Unmarshal(mErr.Contents, &httpErr); err != nil {
return &httpError{
Err: "unmarshal failed",
}
}
return &httpErr
}

3
matterbridge.toml.sample
View File

@ -1231,6 +1231,9 @@ HTMLDisable=false
## RELOADABLE SETTINGS
## Settings below can be reloaded by editing the file
# UseUserName shows the username instead of the server nickname
UseUserName=false
#Whether to prefix messages from other bridges to matrix with the sender's nick.
#Useful if username overrides for incoming webhooks isn't enabled on the
#matrix server. If you set PrefixMessagesWithNick to true, each message