Add DC_EVENT_INCOMING_MSG_BUNCH event (#3643)

* Add DC_EVENT_INCOMING_MSG event

* Fix lots of compile errors

* Docs

* Changelog

* Fix python tests

Adding DC_EVENT_INCOMING_MSG_BUNCH made the python tests fail because they use `get_matching("DC_EVENT_INCOMING_MSG")`, which also matches DC_EVENT_INCOMING_MSG_BUNCH, so the tests got confused.

This fixes `get_matching()` to only match whole event names.

* Also fix test_ac_setup_message_twice()

The built regex was ^EVENT_NAME1|EVENT_NAME2$, which becomes parsed as
"^EVENT_NAME1" OR "EVENT_NAME2$". Introduce a group (parentheses) to fix
this.

* desktop will use DC_EVENT_INCOMING_MSG_BUNCH,
so I would not call it experimental anymore

* add generated node constants

* msg_ids in the event as Vec<u32>
number[] in js land

this is way more convinient than a json encoded string.

* Apply suggestions from code review

Co-authored-by: bjoern <r10s@b44t.com>

Co-authored-by: Simon Laux <mobile.info@simonlaux.de>
Co-authored-by: Simon Laux <Simon-Laux@users.noreply.github.com>
Co-authored-by: bjoern <r10s@b44t.com>

src/events.rs

@@ -189,6 +189,10 @@ pub enum EventType {
         msg_id: MsgId,
     },
 
+    IncomingMsgBunch {
+        msg_ids: Vec<MsgId>,
+    },
+
     /// Messages were seen or noticed.
     /// chat id is always set.
     MsgsNoticed(ChatId),

src/imap.rs

@@ -902,6 +902,12 @@ impl Imap {
 
         info!(context, "{} mails read from \"{}\".", read_cnt, folder);
 
+        let msg_ids = received_msgs
+            .iter()
+            .flat_map(|m| m.msg_ids.clone())
+            .collect();
+        context.emit_event(EventType::IncomingMsgBunch { msg_ids });
+
         chat::mark_old_messages_as_noticed(context, received_msgs).await?;
 
         Ok(read_cnt > 0)