added explicit agent dispatch example (#311)

Author: s-hamdananwar

examples/agent_dispatch.py

@@ -0,0 +1,74 @@
+import asyncio
+import os
+import aiohttp
+from livekit.protocol.room import RoomConfiguration
+from livekit.protocol.agent_dispatch import (
+    RoomAgentDispatch,
+    CreateAgentDispatchRequest,
+)
+from livekit.api import AccessToken, VideoGrants
+from livekit.api.agent_dispatch_service import AgentDispatchService
+
+
+room_name = "my-room"
+agent_name = "test-agent"
+
+"""
+This example demonstrates how to have an agent join a room 
+without using the automatic dispatch. In order to use this 
+feature, you must have an agent running with `agent_name` set 
+when defining your WorkerOptions. A dispatch requests the 
+agent to enter a specific room with optional metadata.
+"""
+
+
+async def create_explicit_disptach(http_session: aiohttp.ClientSession):
+    agent_disptach_service = AgentDispatchService(
+        session=http_session,
+        url=os.getenv("LIVEKIT_URL"),
+        api_key=os.getenv("LIVEKIT_API_KEY"),
+        api_secret=os.getenv("LIVEKIT_API_SECRET"),
+    )
+    dispatch_request = CreateAgentDispatchRequest(
+        agent_name=agent_name, room=room_name, metadata="my_metadata"
+    )
+    dispatch = await agent_disptach_service.create_dispatch(dispatch_request)
+    print("created dispatch", dispatch)
+    dispatches = await agent_disptach_service.list_dispatch(room_name=room_name)
+    print(f"there are {len(dispatches)} dispatches in {room_name}")
+
+
+"""
+When agent name is set, the agent will no longer be automatically dispatched
+to new rooms. If you want that agent to be dispatched to a new room as soon as
+the participant connects, you can set the RoomConfiguration with the agent
+definition in the access token.
+"""
+
+
+async def create_token_with_agent_dispatch() -> str:
+    token = (
+        AccessToken()
+        .with_identity("my_participant")
+        .with_grants(VideoGrants(room_join=True, room=room_name))
+        .with_room_config(
+            RoomConfiguration(
+                agents=[
+                    RoomAgentDispatch(agent_name="test-agent", metadata="my_metadata")
+                ],
+            ),
+        )
+        .to_jwt()
+    )
+    return token
+
+
+async def main():
+    async with aiohttp.ClientSession() as http_session:
+        token = await create_token_with_agent_dispatch()
+        print("created participant token", token)
+        print("creating explicit dispatch")
+        await create_explicit_disptach(http_session)
+
+
+asyncio.run(main())