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Show mxids in case of clashing usernames (matrix) (#1309)

Fixes #1302.
This commit is contained in:
Simon THOBY 2020-11-25 23:51:23 +01:00 committed by GitHub
parent 0c19716f44
commit 29e29439ee
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@ -3,6 +3,7 @@ package bmatrix
import (
"encoding/json"
"errors"
"fmt"
"html"
"strings"
"time"
@ -82,20 +83,36 @@ func (b *Bmatrix) getDisplayName(mxid string) string {
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
// scan to delete old entries, to stop memory usage from becoming too high with old entries.
// In addition, we also detect if another user have the same username, and if so, we append their mxids to their usernames to differentiate them.
toDelete := []string{}
b.RLock()
for k, v := range b.NicknameMap {
if now.Sub(v.lastUpdated) > 10*time.Minute {
toDelete = append(toDelete, k)
}
}
b.RUnlock()
conflict := false
b.Lock()
for mxid, v := range b.NicknameMap {
// to prevent username reuse across matrix servers - or even on the same server, append
// the mxid to the username when there is a conflict
if v.displayName == displayName {
conflict = true
// TODO: it would be nice to be able to rename previous messages from this user.
// The current behavior is that only users with clashing usernames and *that have spoken since the bridge last started* will get their mxids shown, and I don't know if that's the expected behavior.
v.displayName = fmt.Sprintf("%s (%s)", displayName, mxid)
b.NicknameMap[mxid] = v
}
if now.Sub(v.lastUpdated) > 10*time.Minute {
toDelete = append(toDelete, mxid)
}
}
if conflict {
displayName = fmt.Sprintf("%s (%s)", displayName, mxid)
}
for _, v := range toDelete {
delete(b.NicknameMap, v)
}
b.NicknameMap[mxid] = NicknameCacheEntry{
displayName: displayName,
lastUpdated: now,