do synchronous webscreen delete

pkg/cmdrunner/cmdrunner.go

@@ -176,6 +176,7 @@ func init() {
 	registerCmdFn("client", ClientCommand)
 	registerCmdFn("client:show", ClientShowCommand)
 	registerCmdFn("client:set", ClientSetCommand)
+	registerCmdFn("client:notifyupdatewriter", ClientNotifyUpdateWriterCommand)
 
 	registerCmdFn("telemetry", TelemetryCommand)
 	registerCmdFn("telemetry:on", TelemetryOnCommand)
@@ -1691,11 +1692,26 @@ func ScreenWebShareCommand(ctx context.Context, pk *scpacket.FeCommandPacketType
 		}
 		infoWebShareLink = true
 	} else {
+		screen, err := sstore.GetScreenById(ctx, ids.ScreenId)
+		if err != nil {
+			return nil, fmt.Errorf("cannot get screen: %v", err)
+		}
+		if screen == nil {
+			return nil, fmt.Errorf("screen not found")
+		}
+		if screen.ShareMode != sstore.ShareModeWeb {
+			return nil, fmt.Errorf("screen is not currently shared")
+		}
+		webUpdate := pcloud.MakeScreenDelUpdate(screen, ids.ScreenId)
+		err = pcloud.DoSyncWebUpdate(webUpdate)
+		if err != nil {
+			return nil, fmt.Errorf("error stopping webshare, error contacting prompt cloud server: %v", err)
+		}
 		err = sstore.ScreenWebShareStop(ctx, ids.ScreenId)
 		if err != nil {
 			return nil, fmt.Errorf("cannot stop web-sharing screen: %v", err)
 		}
-		infoMsg = fmt.Sprintf("screen is no longer web shared")
+		infoMsg = fmt.Sprintf("screen websharing stopped")
 	}
 	screen, err := sstore.GetScreenById(ctx, ids.ScreenId)
 	if err != nil {
@@ -2749,6 +2765,16 @@ func ClientCommand(ctx context.Context, pk *scpacket.FeCommandPacketType) (sstor
 	return nil, fmt.Errorf("/client requires a subcommand: %s", formatStrs([]string{"show", "set"}, "or", false))
 }
 
+func ClientNotifyUpdateWriterCommand(ctx context.Context, pk *scpacket.FeCommandPacketType) (sstore.UpdatePacket, error) {
+	sstore.NotifyUpdateWriter()
+	update := sstore.ModelUpdate{
+		Info: &sstore.InfoMsgType{
+			InfoMsg: fmt.Sprintf("notified update writer"),
+		},
+	}
+	return update, nil
+}
+
 func boolToStr(v bool, trueStr string, falseStr string) string {
 	if v {
 		return trueStr

pkg/pcloud/pcloud.go

@@ -202,6 +202,16 @@ func MakeScreenNewUpdate(screen *sstore.ScreenType, webShareOpts sstore.ScreenWe
 	return rtn
 }
 
+func MakeScreenDelUpdate(screen *sstore.ScreenType, screenId string) *WebShareUpdateType {
+	rtn := &WebShareUpdateType{
+		ScreenId:   screenId,
+		UpdateId:   -1,
+		UpdateType: sstore.UpdateType_ScreenDel,
+		UpdateTs:   time.Now().UnixMilli(),
+	}
+	return rtn
+}
+
 func makeWebShareUpdate(ctx context.Context, update *sstore.ScreenUpdateType) (*WebShareUpdateType, error) {
 	rtn := &WebShareUpdateType{
 		ScreenId:   update.ScreenId,

pkg/sstore/dbops.go

@@ -2463,7 +2463,7 @@ func ScreenWebShareStop(ctx context.Context, screenId string) error {
 		}
 		query = `UPDATE screen SET sharemode = ?, webshareopts = ? WHERE screenid = ?`
 		tx.Exec(query, ShareModeLocal, "null", screenId)
-		insertScreenDelUpdate(tx, screenId)
+		handleScreenDelUpdate(tx, screenId)
 		return nil
 	})
 }
@@ -2494,12 +2494,18 @@ func insertScreenNewUpdate(tx *TxWrap, screenId string) {
 	NotifyUpdateWriter()
 }
 
-func insertScreenDelUpdate(tx *TxWrap, screenId string) {
+func handleScreenDelUpdate(tx *TxWrap, screenId string) {
 	query := `DELETE FROM screenupdate WHERE screenid = ?`
 	tx.Exec(query, screenId)
 	query = `DELETE FROM webptypos WHERE screenid = ?`
 	tx.Exec(query, screenId)
+	// don't insert UpdateType_ScreenDel (we already processed it in cmdrunner)
+}
+
+func insertScreenDelUpdate(tx *TxWrap, screenId string) {
+	handleScreenDelUpdate(tx, screenId)
 	insertScreenUpdate(tx, screenId, UpdateType_ScreenDel)
+	// don't insert UpdateType_ScreenDel (we already processed it in cmdrunner)
 }
 
 func insertScreenLineUpdate(tx *TxWrap, screenId string, lineId string, updateType string) {