fix(dispatcher): middleware and event emitter related fixes

packages/dispatcher/src/dispatcher.ts

@@ -437,11 +437,16 @@ export class Dispatcher<
 
         const isRawMessage = update && tl.isAnyMessage(update)
 
-        if (parsed === undefined && this._handlersCount[update!._]) {
+        if (parsed === undefined) {
             const pair = PARSERS[update!._]
             if (pair) {
+                if (
+                    this._handlersCount[update!._] ||
+                    this.listenerCount(pair[0])
+                ) {
                     parsed = pair[1](this._client, update!, users!, chats!)
                     parsedType = pair[0]
+                }
             } else {
                 parsed = parsedType = null
             }
@@ -524,8 +529,10 @@ export class Dispatcher<
         let shouldDispatch = true
         let shouldDispatchChildren = true
         let wasHandled = false
+        let updateInfo: any = null
 
-        const updateInfo = { type: parsedType, data: parsed }
+        if (parsed) {
+            updateInfo = { type: parsedType, data: parsed }
             switch (
                 await this._preUpdateHandler?.(
                     updateInfo as any,
@@ -538,6 +545,7 @@ export class Dispatcher<
                 case 'stop-children':
                     return false
             }
+        }
 
         if (shouldDispatch) {
             if (update && !isRawMessage) {
@@ -678,11 +686,13 @@ export class Dispatcher<
             }
         }
 
+        if (updateInfo) {
             this._postUpdateHandler?.(
                 wasHandled,
-            updateInfo as any,
+                updateInfo,
                 parsedState as any
             )
+        }
 
         return wasHandled
     }