add delete event for webxdc

src/events.rs

@@ -302,4 +302,9 @@ pub enum EventType {
         msg_id: MsgId,
         status_update_serial: StatusUpdateSerial,
     },
+
+    /// Inform that an instance cointaining a webxdc has been deleted
+    WebXdInstanceDeleted {
+        msg_id: MsgId,
+    },
 }

src/message.rs

@@ -1236,6 +1236,9 @@ pub async fn delete_msgs(context: &Context, msg_ids: &[MsgId]) -> Result<()> {
             .trash(context)
             .await
             .with_context(|| format!("Unable to trash message {}", msg_id))?;
+
+        context.emit_event(EventType::WebXdInstanceDeleted { msg_id: *msg_id });
+
         context
             .sql
             .execute(

src/webxdc.rs

@@ -753,6 +753,7 @@ mod tests {
     use crate::chatlist::Chatlist;
     use crate::config::Config;
     use crate::contact::Contact;
+    use crate::message;
     use crate::receive_imf::{receive_imf, receive_imf_inner};
     use crate::test_utils::TestContext;
 
@@ -2377,4 +2378,18 @@ sth_for_the = "future""#
         );
         Ok(())
     }
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_webxdc_delete_event() -> Result<()> {
+        let alice = TestContext::new_alice().await;
+        let chat_id = create_group_chat(&alice, ProtectionStatus::Unprotected, "foo").await?;
+        let instance = send_webxdc_instance(&alice, chat_id).await?;
+        //let msg_id = alice.pop_sent_msg().await;
+        message::delete_msgs(&alice, &[instance.id]).await?;
+        alice
+            .evtracker
+            .get_matching(|evt| matches!(evt, EventType::WebXdInstanceDeleted { .. }))
+            .await;
+        Ok(())
+    }
 }