add: edge template

edge/app/interfaces/agent_gateway.py

@@ -0,0 +1,40 @@
+from abc import ABC, abstractmethod
+
+
+class AgentGateway(ABC):
+    """
+    Abstract class representing the Agent Gateway interface.
+    All agent gateway adapters must implement these methods.
+    """
+
+    @abstractmethod
+    def on_message(self, client, userdata, msg):
+        """
+        Method to handle incoming messages from the agent.
+        Parameters:
+            client: MQTT client instance.
+            userdata: Any additional user data passed to the MQTT client.
+            msg: The MQTT message received from the agent.
+        """
+        pass
+
+    @abstractmethod
+    def connect(self):
+        """
+        Method to establish a connection to the agent.
+        """
+        pass
+
+    @abstractmethod
+    def start(self):
+        """
+        Method to start listening for messages from the agent.
+        """
+        pass
+
+    @abstractmethod
+    def stop(self):
+        """
+        Method to stop the agent gateway and clean up resources.
+        """
+        pass