req returns all lastest events when no kind is specefied.

server/handlers/req.go

@@ -50,6 +50,7 @@ func HandleReq(ws *websocket.Conn, message []interface{}, subscriptions map[stri
 			fmt.Println("Dropped oldest subscription:", oldestSubID)
 		}
 
+		// Prepare filters based on the incoming message
 		filters := make([]relay.Filter, len(message)-2)
 		for i, filter := range message[2:] {
 			filterData, ok := filter.(map[string]interface{})
@@ -73,7 +74,7 @@ func HandleReq(ws *websocket.Conn, message []interface{}, subscriptions map[stri
 
 		// Add the new subscription or update the existing one
 		subscriptions[subID] = filters
-		fmt.Println("Subscription updated:", subID)
+		fmt.Printf("Subscription updated: %s with %d filters\n", subID, len(filters))
 
 		// Query the database with filters and send back the results
 		queriedEvents, err := QueryEvents(filters, db.GetClient(), "grain")
@@ -83,6 +84,13 @@ func HandleReq(ws *websocket.Conn, message []interface{}, subscriptions map[stri
 			return
 		}
 
+		// Log the number of events retrieved
+		fmt.Printf("Retrieved %d events for subscription %s\n", len(queriedEvents), subID)
+		if len(queriedEvents) == 0 {
+			fmt.Printf("No matching events found for subscription %s\n", subID)
+		}
+
+		// Send each event back to the client
 		for _, evt := range queriedEvents {
 			msg := []interface{}{"EVENT", subID, evt}
 			msgBytes, _ := json.Marshal(msg)
@@ -103,16 +111,19 @@ func HandleReq(ws *websocket.Conn, message []interface{}, subscriptions map[stri
 			response.SendClosed(ws, subID, "error: could not send EOSE")
 			return
 		}
+
+		fmt.Println("Subscription handling completed, keeping connection open.")
 	})
 }
 
-// QueryEvents queries events from the MongoDB collection based on filters
+// QueryEvents queries events from the MongoDB collection(s) based on filters
 func QueryEvents(filters []relay.Filter, client *mongo.Client, databaseName string) ([]relay.Event, error) {
 	var results []relay.Event
 
 	for _, filter := range filters {
 		filterBson := bson.M{}
 
+		// Construct the BSON query based on the filters
 		if len(filter.IDs) > 0 {
 			filterBson["id"] = bson.M{"$in": filter.IDs}
 		}
@@ -145,24 +156,57 @@ func QueryEvents(filters []relay.Filter, client *mongo.Client, databaseName stri
 			opts.SetLimit(int64(*filter.Limit))
 		}
 
-		for _, kind := range filter.Kinds {
+		// If no specific kinds are specified, query all collections in the database
-			collectionName := fmt.Sprintf("event-kind%d", kind)
+		if len(filter.Kinds) == 0 {
+			collections, err := client.Database(databaseName).ListCollectionNames(context.TODO(), bson.D{})
+			if err != nil {
+				return nil, fmt.Errorf("error listing collections: %v", err)
+			}
+
+			for _, collectionName := range collections {
+				fmt.Printf("Querying collection: %s with query: %v\n", collectionName, filterBson)
+
 				collection := client.Database(databaseName).Collection(collectionName)
 				cursor, err := collection.Find(context.TODO(), filterBson, opts)
 				if err != nil {
-				return nil, fmt.Errorf("error querying events: %v", err)
+					return nil, fmt.Errorf("error querying collection %s: %v", collectionName, err)
 				}
 				defer cursor.Close(context.TODO())
 
 				for cursor.Next(context.TODO()) {
 					var event relay.Event
 					if err := cursor.Decode(&event); err != nil {
-					return nil, fmt.Errorf("error decoding event: %v", err)
+						return nil, fmt.Errorf("error decoding event from collection %s: %v", collectionName, err)
 					}
 					results = append(results, event)
 				}
 				if err := cursor.Err(); err != nil {
-				return nil, fmt.Errorf("cursor error: %v", err)
+					return nil, fmt.Errorf("cursor error in collection %s: %v", collectionName, err)
+				}
+			}
+		} else {
+			// Query specific collections based on kinds
+			for _, kind := range filter.Kinds {
+				collectionName := fmt.Sprintf("event-kind%d", kind)
+				fmt.Printf("Querying collection: %s with query: %v\n", collectionName, filterBson)
+
+				collection := client.Database(databaseName).Collection(collectionName)
+				cursor, err := collection.Find(context.TODO(), filterBson, opts)
+				if err != nil {
+					return nil, fmt.Errorf("error querying collection %s: %v", collectionName, err)
+				}
+				defer cursor.Close(context.TODO())
+
+				for cursor.Next(context.TODO()) {
+					var event relay.Event
+					if err := cursor.Decode(&event); err != nil {
+						return nil, fmt.Errorf("error decoding event from collection %s: %v", collectionName, err)
+					}
+					results = append(results, event)
+				}
+				if err := cursor.Err(); err != nil {
+					return nil, fmt.Errorf("cursor error in collection %s: %v", collectionName, err)
+				}
 			}
 		}
 	}