introduce two new events

CHANGELOG.md

@@ -29,6 +29,8 @@
   this affects `dc_get_chat_contacts()`, `dc_get_contacts()` and `dc_get_blocked_contacts()` #3562
 - add `internet_access` flag to `dc_msg_get_webxdc_info()` #3516
 - `DC_EVENT_WEBXDC_INSTANCE_DELETED` is emitted when a message containing a webxdc gets deleted #3105
+- `DC_EVENT_WEBXDC_BUSY_UPDATING` is emitted when a new update has to be sent by an webxdc #3320
+- `DC_EVENT_WEBXDC_UP_TO_DATE` is emitted when a webxdc has sent all updates #3320
 
 ### Fixes
 - do not emit notifications for blocked chats #3557

deltachat-ffi/deltachat.h

@@ -5731,10 +5731,24 @@ void dc_event_unref(dc_event_t* event);
  *
  * @param data1 (int) msg_id
  */
-
 #define DC_EVENT_WEBXDC_INSTANCE_DELETED          2121
 
 
+/**
+ * Webxdc has some updates that need to be sent
+ *
+ * @param data1 (int) msg_id
+ */
+#define DC_EVENT_WEBXDC_BUSY_UPDATING             2122
+
+
+/**
+ * Webxdc has finished sending updates
+ *
+ * @param data1 (int) msg_id
+ */
+#define DC_EVENT_WEBXDC_UP_TO_DATE                2123
+
 /**
  * @}
  */

deltachat-ffi/src/lib.rs

@@ -505,6 +505,8 @@ pub unsafe extern "C" fn dc_event_get_id(event: *mut dc_event_t) -> libc::c_int
         EventType::SelfavatarChanged => 2110,
         EventType::WebxdcStatusUpdate { .. } => 2120,
         EventType::WebxdcInstanceDeleted { .. } => 2121,
+        EventType::WebxdcBusyUpdating { .. } => 2022,
+        EventType::WebxdcUpToDate { .. } => 2023,
     }
 }
 
@@ -552,6 +554,8 @@ pub unsafe extern "C" fn dc_event_get_data1_int(event: *mut dc_event_t) -> libc:
         }
         EventType::WebxdcStatusUpdate { msg_id, .. } => msg_id.to_u32() as libc::c_int,
         EventType::WebxdcInstanceDeleted { msg_id, .. } => msg_id.to_u32() as libc::c_int,
+        EventType::WebxdcBusyUpdating { msg_id } => msg_id.to_u32() as libc::c_int,
+        EventType::WebxdcUpToDate { msg_id } => msg_id.to_u32() as libc::c_int,
     }
 }
 
@@ -584,6 +588,8 @@ pub unsafe extern "C" fn dc_event_get_data2_int(event: *mut dc_event_t) -> libc:
         | EventType::MsgsNoticed(_)
         | EventType::ConnectivityChanged
         | EventType::WebxdcInstanceDeleted { .. }
+        | EventType::WebxdcBusyUpdating { .. }
+        | EventType::WebxdcUpToDate { .. }
         | EventType::SelfavatarChanged => 0,
         EventType::ChatModified(_) => 0,
         EventType::MsgsChanged { msg_id, .. }
@@ -641,6 +647,8 @@ pub unsafe extern "C" fn dc_event_get_data2_str(event: *mut dc_event_t) -> *mut
         | EventType::SelfavatarChanged
         | EventType::WebxdcStatusUpdate { .. }
         | EventType::WebxdcInstanceDeleted { .. }
+        | EventType::WebxdcBusyUpdating { .. }
+        | EventType::WebxdcUpToDate { .. }
         | EventType::ChatEphemeralTimerModified { .. } => ptr::null_mut(),
         EventType::ConfigureProgress { comment, .. } => {
             if let Some(comment) = comment {

deltachat-jsonrpc/src/api/events.rs

@@ -61,6 +61,8 @@ pub fn event_to_json_rpc_notification(event: Event) -> Value {
             status_update_serial,
         } => (json!(msg_id), json!(status_update_serial)),
         EventType::WebxdcInstanceDeleted { msg_id } => (json!(msg_id), Value::Null),
+        EventType::WebxdcBusyUpdating { msg_id } => (json!(msg_id), Value::Null),
+        EventType::WebxdcUpToDate { msg_id } => (json!(msg_id), Value::Null),
     };
 
     let id: EventTypeName = event.typ.into();
@@ -103,7 +105,9 @@ pub enum EventTypeName {
     ConnectivityChanged,
     SelfavatarChanged,
     WebxdcStatusUpdate,
-    WebXdInstanceDeleted,
+    WebxdcInstanceDeleted,
+    WebxdcBusyUpdating,
+    WebxdcUpToDate,
 }
 
 impl From<EventType> for EventTypeName {
@@ -139,7 +143,9 @@ impl From<EventType> for EventTypeName {
             EventType::ConnectivityChanged => ConnectivityChanged,
             EventType::SelfavatarChanged => SelfavatarChanged,
             EventType::WebxdcStatusUpdate { .. } => WebxdcStatusUpdate,
-            EventType::WebxdcInstanceDeleted { .. } => WebXdInstanceDeleted,
+            EventType::WebxdcInstanceDeleted { .. } => WebxdcInstanceDeleted,
+            EventType::WebxdcBusyUpdating { .. } => WebxdcBusyUpdating,
+            EventType::WebxdcUpToDate { .. } => WebxdcUpToDate,
         }
     }
 }

src/events.rs

@@ -307,4 +307,12 @@ pub enum EventType {
     WebxdcInstanceDeleted {
         msg_id: MsgId,
     },
+
+    WebxdcBusyUpdating {
+        msg_id: MsgId,
+    },
+
+    WebxdcUpToDate {
+        msg_id: MsgId,
+    },
 }

src/scheduler.rs

@@ -332,7 +332,7 @@ async fn smtp_loop(ctx: Context, started: Sender<()>, smtp_handlers: SmtpConnect
                 if !duration_until_can_send.is_zero() {
                     info!(
                         ctx,
-                        "smtp got rate limited, waiting for {} until can send again",
+                        "smtp got rate limited, delaying next try by {}",
                         duration_to_str(duration_until_can_send)
                     );
                     tokio::time::timeout(duration_until_can_send, async {

src/smtp.rs

@@ -22,6 +22,7 @@ use crate::mimefactory::MimeFactory;
 use crate::oauth2::get_oauth2_access_token;
 use crate::provider::Socket;
 use crate::sql;
+use crate::webxdc::get_busy_webxdc_instances;
 use crate::{context::Context, scheduler::connectivity::ConnectivityStore};
 
 /// SMTP write and read timeout in seconds.
@@ -499,7 +500,15 @@ async fn send_mdns(context: &Context, connection: &mut Smtp) -> Result<()> {
 pub(crate) async fn send_smtp_messages(context: &Context, connection: &mut Smtp) -> Result<()> {
     let ratelimited = if context.ratelimit.read().await.can_send() {
         // add status updates and sync messages to end of sending queue
+
+        let update_needed = get_busy_webxdc_instances();
         context.flush_status_updates().await?;
+        let update_needed_after_sending = get_busy_webxdc_instances();
+    
+        for msg_id in update_needed.difference(&update_needed_after_sending) {
+            context.emit_event(EventType::WebxdcUpToDate { msg_id: *msg_id })
+        }
+
         context.send_sync_msg().await?;
         false
     } else {

src/webxdc.rs

@@ -1,5 +1,6 @@
 //! # Handle webxdc messages.
 
+use std::collections::HashSet;
 use std::convert::TryFrom;
 use std::path::Path;
 
@@ -377,6 +378,10 @@ impl Context {
             )
             .await?;
 
+        self.emit_event(EventType::WebxdcBusyUpdating {
+            msg_id: instance.id,
+        });
+
         if send_now {
             self.sql.insert(
                 "INSERT INTO smtp_status_updates (msg_id, first_serial, last_serial, descr) VALUES(?, ?, ?, ?)
@@ -390,7 +395,6 @@ impl Context {
     }
 
     /// Pops one record of queued webxdc status updates.
-    /// This function exists to make the sqlite statement testable.
     async fn pop_smtp_status_update(
         &self,
     ) -> Result<Option<(MsgId, StatusUpdateSerial, StatusUpdateSerial, String)>> {
@@ -744,6 +748,12 @@ impl Message {
     }
 }
 
+/// Returns a hashset of all webxdc instaces which still have updates to send
+pub(crate) fn get_busy_webxdc_instances() -> HashSet<MsgId> {
+    // TODO: add sql statement to find that out
+    unimplemented!()
+}
+
 #[cfg(test)]
 mod tests {
     use crate::chat::{