api/utils.py

from datetime import datetime
import json
from typing import Any, Dict, Optional
import uuid
import re

import httpx
from api.config import (
    MODEL_MAPPING,
    USER_SELECTED_MODEL,
    MODEL_PREFIXES,
    MODEL_REFERERS,
    MODEL_ALIASES,
    headers,
    AGENT_MODE,
    TRENDING_AGENT_MODE,
    BASE_URL,
)
from fastapi import HTTPException
from api.models import ChatRequest
from api.logger import setup_logger

logger = setup_logger(__name__)


def create_chat_completion_data(
    content: str, model: str, timestamp: int, finish_reason: Optional[str] = None
) -> Dict[str, Any]:
    return {
        "id": f"chatcmpl-{uuid.uuid4()}",
        "object": "chat.completion.chunk",
        "created": timestamp,
        "model": model,
        "choices": [
            {
                "index": 0,
                "delta": {"content": content, "role": "assistant"},
                "finish_reason": finish_reason,
            }
        ],
        "usage": None,
    }


def message_to_dict(message):
    if isinstance(message.content, str):
        return {"role": message.role, "content": message.content}
    elif isinstance(message.content, list) and len(message.content) == 2:
        return {
            "role": message.role,
            "content": message.content[0]["text"],
            "data": {
                "imageBase64": message.content[1]["image_url"]["url"],
                "fileText": "",
                "title": "snapshot",
            },
        }
    else:
        return {"role": message.role, "content": message.content}


def get_full_model_name(model: str) -> str:
    # Handle aliases
    return MODEL_ALIASES.get(model, model)


def get_model_prefix(model: str) -> str:
    return MODEL_PREFIXES.get(model, "")


def get_referer_url(model: str) -> str:
    referer_path = MODEL_REFERERS.get(model, f"/?model={model}")
    return f"{BASE_URL}{referer_path}"


async def process_streaming_response(request: ChatRequest):
    model = get_full_model_name(request.model)
    agent_mode = AGENT_MODE.get(model, {})
    trending_agent_mode = TRENDING_AGENT_MODE.get(model, {})

    prefix = get_model_prefix(model)

    # Construct formatted prompt
    formatted_prompt = ""
    for msg in request.messages:
        role = msg.role.capitalize()
        content = msg.content
        if isinstance(content, list) and len(content) == 2:
            # Handle image content
            content = f"FILE:BB\n$#$\n\n$#$\n{msg.content[0]['text']}"
        if role and content:
            formatted_prompt += f"{role}: {content}\n"

    if prefix:
        formatted_prompt = f"{prefix} {formatted_prompt}".strip()

    json_data = {
        "messages": [
            {
                "role": msg.role,
                "content": msg.content[0]["text"] if isinstance(msg.content, list) else msg.content,
                "data": msg.content[1]["image_url"]["url"] if isinstance(msg.content, list) and len(msg.content) == 2 else None,
            }
            for msg in request.messages
        ],
        "previewToken": None,
        "userId": None,
        "codeModelMode": True,
        "agentMode": agent_mode,
        "trendingAgentMode": trending_agent_mode,
        "isMicMode": False,
        "userSystemPrompt": None,
        "maxTokens": request.max_tokens,
        "playgroundTopP": request.top_p,
        "playgroundTemperature": request.temperature,
        "isChromeExt": False,
        "githubToken": None,
        "clickedAnswer2": False,
        "clickedAnswer3": False,
        "clickedForceWebSearch": False,
        "visitFromDelta": False,
        "mobileClient": False,
        "userSelectedModel": USER_SELECTED_MODEL.get(model, model),
    }

    async with httpx.AsyncClient() as client:
        try:
            async with client.stream(
                "POST",
                f"{BASE_URL}/api/chat",
                headers=headers,
                json=json_data,
                timeout=100,
            ) as response:
                response.raise_for_status()
                async for line in response.aiter_lines():
                    timestamp = int(datetime.now().timestamp())
                    if line:
                        content = line
                        # Clean the response if necessary
                        if content.startswith("$@$v=undefined-rv1$@$"):
                            content = content[21:]
                        yield f"data: {json.dumps(create_chat_completion_data(content, model, timestamp))}\n\n"

                # Indicate the end of the stream
                timestamp = int(datetime.now().timestamp())
                yield f"data: {json.dumps(create_chat_completion_data('', model, timestamp, 'stop'))}\n\n"
                yield "data: [DONE]\n\n"
        except httpx.HTTPStatusError as e:
            logger.error(f"HTTP error occurred: {e}")
            raise HTTPException(status_code=e.response.status_code, detail=str(e))
        except httpx.RequestError as e:
            logger.error(f"Error occurred during request: {e}")
            raise HTTPException(status_code=500, detail=str(e))


async def process_non_streaming_response(request: ChatRequest):
    model = get_full_model_name(request.model)
    agent_mode = AGENT_MODE.get(model, {})
    trending_agent_mode = TRENDING_AGENT_MODE.get(model, {})

    prefix = get_model_prefix(model)

    # Construct formatted prompt
    formatted_prompt = ""
    for msg in request.messages:
        role = msg.role.capitalize()
        content = msg.content
        if isinstance(content, list) and len(content) == 2:
            # Handle image content
            content = f"FILE:BB\n$#$\n\n$#$\n{msg.content[0]['text']}"
        if role and content:
            formatted_prompt += f"{role}: {content}\n"

    if prefix:
        formatted_prompt = f"{prefix} {formatted_prompt}".strip()

    json_data = {
        "messages": [
            {
                "role": msg.role,
                "content": msg.content[0]["text"] if isinstance(msg.content, list) else msg.content,
                "data": msg.content[1]["image_url"]["url"] if isinstance(msg.content, list) and len(msg.content) == 2 else None,
            }
            for msg in request.messages
        ],
        "previewToken": None,
        "userId": None,
        "codeModelMode": True,
        "agentMode": agent_mode,
        "trendingAgentMode": trending_agent_mode,
        "isMicMode": False,
        "userSystemPrompt": None,
        "maxTokens": request.max_tokens,
        "playgroundTopP": request.top_p,
        "playgroundTemperature": request.temperature,
        "isChromeExt": False,
        "githubToken": None,
        "clickedAnswer2": False,
        "clickedAnswer3": False,
        "clickedForceWebSearch": False,
        "visitFromDelta": False,
        "mobileClient": False,
        "userSelectedModel": USER_SELECTED_MODEL.get(model, model),
    }

    async with httpx.AsyncClient() as client:
        try:
            response = await client.post(
                f"{BASE_URL}/api/chat",
                headers=headers,
                json=json_data,
                timeout=100,
            )
            response.raise_for_status()
            full_response = response.text

            # Clean the response if necessary
            if full_response.startswith("$@$v=undefined-rv1$@$"):
                full_response = full_response[21:]

            return {
                "id": f"chatcmpl-{uuid.uuid4()}",
                "object": "chat.completion",
                "created": int(datetime.now().timestamp()),
                "model": model,
                "choices": [
                    {
                        "index": 0,
                        "message": {"role": "assistant", "content": full_response},
                        "finish_reason": "stop",
                    }
                ],
                "usage": None,
            }
        except httpx.HTTPStatusError as e:
            logger.error(f"HTTP error occurred: {e}")
            raise HTTPException(status_code=e.response.status_code, detail=str(e))
        except httpx.RequestError as e:
            logger.error(f"Error occurred during request: {e}")
            raise HTTPException(status_code=500, detail=str(e))