Chat Federation, connection to remote chat:

Front-end connect using BOSH or WS directly on the remote server.
If use is logged-in, his nickname is use as default nickname.

server/lib/federation/connection-infos.ts

@@ -0,0 +1,36 @@
+import type { LiveChatJSONLDAttribute } from './types'
+
+interface AnonymousConnectionInfos {
+  roomJID: string
+  boshUri?: string
+  wsUri?: string
+  userJID: string
+}
+
+function anonymousConnectionInfos (livechatInfos: LiveChatJSONLDAttribute | false): AnonymousConnectionInfos | null {
+  if (!livechatInfos) { return null }
+  if (!livechatInfos.links) { return null }
+  if (livechatInfos.type !== 'xmpp') { return null }
+  const r: AnonymousConnectionInfos = {
+    roomJID: livechatInfos.jid,
+    userJID: ''
+  }
+  for (const link of livechatInfos.links) {
+    // Note: userJID is on both links. But should have the same value.
+    if (link.type === 'xmpp-bosh-anonymous') {
+      r.boshUri = link.url
+      r.userJID = link.jid
+    } else if (link.type === 'xmpp-websocket-anonymous') {
+      r.wsUri = link.url
+      r.userJID = link.jid
+    }
+  }
+  if (r.userJID === '') {
+    return null
+  }
+  return r
+}
+
+export {
+  anonymousConnectionInfos
+}