feat: Add broadcast QR type (todo: documentation)

src/securejoin/bob.rs

@@ -47,6 +47,7 @@ pub(super) async fn start_protocol(context: &Context, invite: QrInvite) -> Resul
     let hidden = match invite {
         QrInvite::Contact { .. } => Blocked::Not,
         QrInvite::Group { .. } => Blocked::Yes,
+        QrInvite::Broadcast { .. } => Blocked::Yes,
     };
     let chat_id = ChatId::create_for_contact_with_blocked(context, invite.contact_id(), hidden)
         .await
@@ -113,6 +114,7 @@ pub(super) async fn start_protocol(context: &Context, invite: QrInvite) -> Resul
             chat::add_info_msg(context, group_chat_id, &msg, time()).await?;
             Ok(group_chat_id)
         }
+        QrInvite::Broadcast { .. } => {}
         QrInvite::Contact { .. } => {
             // For setup-contact the BobState already ensured the 1:1 chat exists because it
             // uses it to send the handshake messages.

src/securejoin/qrinvite.rs

@@ -29,6 +29,13 @@ pub enum QrInvite {
         invitenumber: String,
         authcode: String,
     },
+    Broadcast {
+        broadcast_name: String,
+        grpid: String,
+        contact_id: ContactId,
+        fingerprint: Fingerprint,
+        shared_secret: String,
+    },
 }
 
 impl QrInvite {
@@ -95,6 +102,19 @@ impl TryFrom<Qr> for QrInvite {
                 invitenumber,
                 authcode,
             }),
+            Qr::AskJoinBroadcast {
+                broadcast_name,
+                grpid,
+                contact_id,
+                fingerprint,
+                shared_secret,
+            } => Ok(QrInvite::Broadcast {
+                broadcast_name,
+                grpid,
+                contact_id,
+                fingerprint,
+                shared_secret,
+            }),
             _ => bail!("Unsupported QR type"),
         }
     }