include hashtags in AP metadata

activity.go

@@ -733,6 +733,13 @@ func jonkjonk(user *WhatAbout, h *Honk) (junk.Junk, junk.Junk) {
 			t["href"] = m.where
 			tags = append(tags, t)
 		}
+		ooo := ontologies(h.Noise)
+		for _, o := range ooo {
+			t := junk.New()
+			t["type"] = "Hashtag"
+			t["name"] = o
+			tags = append(tags, t)
+		}
 		herd := herdofemus(h.Noise)
 		for _, e := range herd {
 			t := junk.New()

fun.go

@@ -119,6 +119,13 @@ func xfiltrate() string {
 	}
 }
 
+var re_hashes = regexp.MustCompile(`(?:^|\W)#[[:alnum:]]+`)
+
+func ontologies(s string) []string {
+	m := re_hashes.FindAllString(s, -1)
+	return m
+}
+
 type Mention struct {
 	who   string
 	where string