translate known actors to shortnames

fun.go

@@ -70,10 +70,15 @@ func reverbolate(userid int64, honks []*Honk) {
 			h.Username, h.Handle = handles(h.Honker)
 		} else {
 			_, h.Handle = handles(h.Honker)
+			short := shortname(userid, h.Honker)
+			if short != "" {
+				h.Username = short
+			} else {
 				h.Username = h.Handle
 				if len(h.Username) > 20 {
 					h.Username = h.Username[:20] + ".."
 				}
+			}
 			if h.URL == "" {
 				h.URL = h.XID
 			}
@@ -360,6 +365,24 @@ func quickrename(s string, userid int64) string {
 	return s
 }
 
+var shortnames = cacheNew(cacheOptions{Filler: func(userid int64) (map[string]string, bool) {
+	honkers := gethonkers(userid)
+	m := make(map[string]string)
+	for _, h := range honkers {
+		m[h.XID] = h.Name
+	}
+	return m, true
+}})
+
+func shortname(userid int64, xid string) string {
+	var m map[string]string
+	ok := shortnames.Get(userid, &m)
+	if ok {
+		return m[xid]
+	}
+	return ""
+}
+
 func mentionize(s string) string {
 	s = re_mentions.ReplaceAllStringFunc(s, func(m string) string {
 		where := gofish(m)

web.go

@@ -1271,6 +1271,7 @@ func submithonker(w http.ResponseWriter, r *http.Request) {
 	honkerid, _ := strconv.ParseInt(r.FormValue("honkerid"), 10, 0)
 
 	defer combocache.Clear(u.UserID)
+	defer shortnames.Clear(u.UserID)
 
 	if honkerid > 0 {
 		goodbye := r.FormValue("goodbye")