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#
# This file is part of TEN Framework, an open source project.
# Licensed under the Apache License, Version 2.0.
# See the LICENSE file for more information.
#
import asyncio
import json
import time
import traceback
from dataclasses import dataclass
from typing import AsyncGenerator
import aiohttp
from ten import AsyncTenEnv, AudioFrame, Cmd, CmdResult, Data, StatusCode, VideoFrame
from ten_ai_base.config import BaseConfig
from ten_ai_base.types import LLMChatCompletionUserMessageParam, LLMDataCompletionArgs
from ten_ai_base.llm import (
AsyncLLMBaseExtension,
)
CMD_IN_FLUSH = "flush"
CMD_IN_ON_USER_JOINED = "on_user_joined"
CMD_IN_ON_USER_LEFT = "on_user_left"
CMD_OUT_FLUSH = "flush"
CMD_OUT_TOOL_CALL = "tool_call"
DATA_IN_TEXT_DATA_PROPERTY_IS_FINAL = "is_final"
DATA_IN_TEXT_DATA_PROPERTY_TEXT = "text"
DATA_OUT_TEXT_DATA_PROPERTY_TEXT = "text"
DATA_OUT_TEXT_DATA_PROPERTY_END_OF_SEGMENT = "end_of_segment"
CMD_PROPERTY_RESULT = "tool_result"
def is_punctuation(char):
if char in [",", "，", ".", "。", "?", "？", "!", "！"]:
return True
return False
def parse_sentences(sentence_fragment, content):
sentences = []
current_sentence = sentence_fragment
for char in content:
current_sentence += char
if is_punctuation(char):
stripped_sentence = current_sentence
if any(c.isalnum() for c in stripped_sentence):
sentences.append(stripped_sentence)
current_sentence = ""
remain = current_sentence
return sentences, remain
@dataclass
class DifyConfig(BaseConfig):
base_url: str = "https://api.dify.ai/v1"
api_key: str = ""
user_id: str = "TenAgent"
greeting: str = ""
failure_info: str = ""
max_history: int = 32
class DifyExtension(AsyncLLMBaseExtension):
config: DifyConfig = None
ten_env: AsyncTenEnv = None
loop: asyncio.AbstractEventLoop = None
stopped: bool = False
users_count = 0
conversational_id = ""
async def on_init(self, ten_env: AsyncTenEnv) -> None:
await super().on_init(ten_env)
ten_env.log_debug("on_init")
async def on_start(self, ten_env: AsyncTenEnv) -> None:
await super().on_start(ten_env)
ten_env.log_debug("on_start")
self.loop = asyncio.get_event_loop()
self.config = await DifyConfig.create_async(ten_env=ten_env)
ten_env.log_info(f"config: {self.config}")
if not self.config.api_key:
ten_env.log_error("Missing required configuration")
return
self.ten_env = ten_env
async def on_stop(self, ten_env: AsyncTenEnv) -> None:
await super().on_stop(ten_env)
ten_env.log_debug("on_stop")
self.stopped = True
async def on_deinit(self, ten_env: AsyncTenEnv) -> None:
await super().on_deinit(ten_env)
ten_env.log_debug("on_deinit")
async def on_cmd(self, ten_env: AsyncTenEnv, cmd: Cmd) -> None:
cmd_name = cmd.get_name()
ten_env.log_debug("on_cmd name {}".format(cmd_name))
status = StatusCode.OK
detail = "success"
if cmd_name == CMD_IN_FLUSH:
await self.flush_input_items(ten_env)
await ten_env.send_cmd(Cmd.create(CMD_OUT_FLUSH))
ten_env.log_info("on flush")
elif cmd_name == CMD_IN_ON_USER_JOINED:
self.users_count += 1
# Send greeting when first user joined
if self.config.greeting and self.users_count == 1:
self.send_text_output(ten_env, self.config.greeting, True)
elif cmd_name == CMD_IN_ON_USER_LEFT:
self.users_count -= 1
else:
await super().on_cmd(ten_env, cmd)
return
cmd_result = CmdResult.create(status)
cmd_result.set_property_string("detail", detail)
await ten_env.return_result(cmd_result, cmd)
async def on_data(self, ten_env: AsyncTenEnv, data: Data) -> None:
data_name = data.get_name()
ten_env.log_info("on_data name {}".format(data_name))
is_final = False
input_text = ""
try:
is_final = data.get_property_bool(DATA_IN_TEXT_DATA_PROPERTY_IS_FINAL)
except Exception as err:
ten_env.log_info(
f"GetProperty optional {DATA_IN_TEXT_DATA_PROPERTY_IS_FINAL} failed, err: {err}"
)
try:
input_text = data.get_property_string(DATA_IN_TEXT_DATA_PROPERTY_TEXT)
except Exception as err:
ten_env.log_info(
f"GetProperty optional {DATA_IN_TEXT_DATA_PROPERTY_TEXT} failed, err: {err}"
)
if not is_final:
ten_env.log_info("ignore non-final input")
return
if not input_text:
ten_env.log_info("ignore empty text")
return
ten_env.log_info(f"OnData input text: [{input_text}]")
# Start an asynchronous task for handling chat completion
message = LLMChatCompletionUserMessageParam(role="user", content=input_text)
await self.queue_input_item(False, messages=[message])
async def on_audio_frame(
self, ten_env: AsyncTenEnv, audio_frame: AudioFrame
) -> None:
pass
async def on_video_frame(
self, ten_env: AsyncTenEnv, video_frame: VideoFrame
) -> None:
pass
async def on_call_chat_completion(self, async_ten_env, **kargs):
raise NotImplementedError
async def on_tools_update(self, async_ten_env, tool):
raise NotImplementedError
async def on_data_chat_completion(
self, ten_env: AsyncTenEnv, **kargs: LLMDataCompletionArgs
) -> None:
input_messages: LLMChatCompletionUserMessageParam = kargs.get("messages", [])
if not input_messages:
ten_env.log_warn("No message in data")
total_output = ""
sentence_fragment = ""
calls = {}
sentences = []
self.ten_env.log_info(f"messages: {input_messages}")
response = self._stream_chat(query=input_messages[0]["content"])
async for message in response:
# self.ten_env.log_info(f"content: {message}")
message_type = message.get("event")
if message_type == "message" or message_type == "agent_message":
if not self.conversational_id and message.get("conversation_id"):
self.conversational_id = message["conversation_id"]
ten_env.log_info(f"conversation_id: {self.conversational_id}")
total_output += message.get("answer", "")
sentences, sentence_fragment = parse_sentences(
sentence_fragment, message.get("answer", "")
)
for s in sentences:
await self._send_text(s, False)
elif message_type == "message_end":
metadata = message.get("metadata", {})
ten_env.log_info(f"metadata: {metadata}")
elif message_type == "error":
err_message = message.get("message", {})
ten_env.log_error(f"error: {err_message}")
await self._send_text(err_message, True)
# data: {"event": "message", "task_id": "900bbd43-dc0b-4383-a372-aa6e6c414227", "id": "663c5084-a254-4040-8ad3-51f2a3c1a77c", "answer": "Hi", "created_at": 1705398420}\n\n
# try:
# if message.event == ChatEventType.CONVERSATION_MESSAGE_DELTA:
# total_output += message.message.content
# sentences, sentence_fragment = parse_sentences(
# sentence_fragment, message.message.content)
# for s in sentences:
# await self._send_text(s, False)
# elif message.event == ChatEventType.CONVERSATION_MESSAGE_COMPLETED:
# if sentence_fragment:
# await self._send_text(sentence_fragment, True)
# else:
# await self._send_text("", True)
# elif message.event == ChatEventType.CONVERSATION_CHAT_FAILED:
# last_error = message.chat.last_error
# if last_error and last_error.code == 4011:
# await self._send_text("The Coze token has been depleted. Please check your token usage.", True)
# else:
# await self._send_text(last_error.msg, True)
# except Exception as e:
# self.ten_env.log_error(f"Failed to parse response: {message} {e}")
# traceback.print_exc()
await self._send_text(sentence_fragment, True)
self.ten_env.log_info(f"total_output: {total_output} {calls}")
async def _stream_chat(self, query: str) -> AsyncGenerator[dict, None]:
async with aiohttp.ClientSession() as session:
try:
payload = {
"inputs": {},
"query": query,
"response_mode": "streaming",
}
if self.conversational_id:
payload["conversation_id"] = self.conversational_id
if self.config.user_id:
payload["user"] = self.config.user_id
self.ten_env.log_info(f"payload before sending: {json.dumps(payload)}")
headers = {
"Authorization": f"Bearer {self.config.api_key}",
"Content-Type": "application/json",
}
url = f"{self.config.base_url}/chat-messages"
start_time = time.time()
async with session.post(url, json=payload, headers=headers) as response:
if response.status != 200:
r = await response.json()
self.ten_env.log_error(
f"Received unexpected status {r} from the server."
)
if self.config.failure_info:
await self._send_text(self.config.failure_info, True)
return
end_time = time.time()
self.ten_env.log_info(f"connect time {end_time - start_time} s")
async for line in response.content:
if line:
l = line.decode("utf-8").strip()
if l.startswith("data:"):
content = l[5:].strip()
if content == "[DONE]":
break
self.ten_env.log_debug(f"content: {content}")
yield json.loads(content)
except Exception as e:
traceback.print_exc()
self.ten_env.log_error(f"Failed to handle {e}")
finally:
await session.close()
session = None
async def _send_text(self, text: str, end_of_segment: bool) -> None:
data = Data.create("text_data")
data.set_property_string(DATA_OUT_TEXT_DATA_PROPERTY_TEXT, text)
data.set_property_bool(
DATA_OUT_TEXT_DATA_PROPERTY_END_OF_SEGMENT, end_of_segment
)
asyncio.create_task(self.ten_env.send_data(data))
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