Federation (#327)

* initial commit federation

* more federation

* more federation

* more federation

* completes follow, accept, undo

* add trail create activity

* process trail create activity

* more trail create activity

* adds missing endpoints

* adds update and delete activity

* adds comment activities

* adds activities back

* adds summit logs activities

* deletes follow counts table

* fixes migrations

* fixes migrations

* fixes migrations

* fixes migrations

* adds remote profiles

* ctd

* ctd

* we are getting closer...

* adds public summit logs

* fixes federated trails in lists

* adds remote lists

* adds list activites

* fixes lists

* adds notifications

* adds iri redirect

* fixes comments and summitlogs

* fixes follows and profiles

* adds asynchronous send

* fixes list search

* adds encryption key

* bug fixes

* fixes activity signing

* removes custon activity object types

* adds html editor

* fixes html editor

* fixes display issues on mastodon

* adds federated sharing

* finishes announcements

* fixes small summit log issues

* adds trail likes

* finalizes likes

* fixes images for komoot

* add disable federation option

* adds private profiles

* updates docs

* adds federated comments

* adds trail and comments actvitiypub routes

* adds mentions to editor

* adds mentions to trails, comments, summit logs

* updates theme

* updates theme

* update docs

* update docs

* updates docs

* fixes various frontend problems

* fixes activitypub follows api

* updates docs

* updates docs

---------

Co-authored-by: Christian Beutel <>

web/src/lib/util/activitypub_util.ts

@@ -0,0 +1,26 @@
+
+
+export function splitUsername(handle: string, localDomain?: string) {
+    const cleaned = handle.replace(/^@/, "").trim();
+
+    if (!cleaned.includes("@")) {
+        return [cleaned, localDomain];
+    }
+
+    let [user, domain] = cleaned.split("@");
+
+    return [user, domain]
+}
+
+export function handleFromRecordWithIRI(record: any) {
+    if (!record.expand?.author) {
+        throw new Error("object has no author info")
+    }
+    
+    if (!record.iri) {
+        return `@${record.expand.author.username}`
+    }
+    const url = new URL(record.iri ?? "")
+
+    return `@${record.expand.author.username}@${url.hostname}`
+}