import base64
import hashlib
import io
import json
import logging
import os
import re
import time
import traceback
from typing import (
Any,
BinaryIO,
Dict,
List,
Optional,
Sequence,
Tuple,
cast,
)
# Any, Callable, Dict, List, Literal, Tuple
from urllib.parse import quote_plus # parse_qs, quote, unquote, urlparse, urlunparse
import aiofiles
import PIL.Image
from autogen_agentchat.agents import BaseChatAgent
from autogen_agentchat.base import Response
from autogen_agentchat.messages import ChatMessage, MultiModalMessage, TextMessage
from autogen_core.application.logging import EVENT_LOGGER_NAME
from autogen_core.base import CancellationToken
from autogen_core.components import FunctionCall
from autogen_core.components import Image as AGImage
from autogen_core.components.models import (
AssistantMessage,
ChatCompletionClient,
LLMMessage,
SystemMessage,
UserMessage,
)
from PIL import Image
from playwright.async_api import BrowserContext, Download, Page, Playwright, async_playwright
from ._events import WebSurferEvent
from ._playwright_controller import PlaywrightController
from ._prompts import WEB_SURFER_OCR_PROMPT, WEB_SURFER_QA_PROMPT, WEB_SURFER_QA_SYSTEM_MESSAGE, WEB_SURFER_TOOL_PROMPT
from ._set_of_mark import add_set_of_mark
from ._tool_definitions import (
TOOL_CLICK,
TOOL_HISTORY_BACK,
TOOL_HOVER,
TOOL_PAGE_DOWN,
TOOL_PAGE_UP,
TOOL_READ_PAGE_AND_ANSWER,
# TOOL_SCROLL_ELEMENT_DOWN,
# TOOL_SCROLL_ELEMENT_UP,
TOOL_SLEEP,
TOOL_SUMMARIZE_PAGE,
TOOL_TYPE,
TOOL_VISIT_URL,
TOOL_WEB_SEARCH,
)
from ._types import InteractiveRegion, UserContent
from ._utils import message_content_to_str
# Viewport dimensions
VIEWPORT_HEIGHT = 900
VIEWPORT_WIDTH = 1440
# Size of the image we send to the MLM
# Current values represent a 0.85 scaling to fit within the GPT-4v short-edge constraints (768px)
MLM_HEIGHT = 765
MLM_WIDTH = 1224
SCREENSHOT_TOKENS = 1105
[docs]
class MultimodalWebSurfer(BaseChatAgent):
"""(In preview) A multimodal agent that acts as a web surfer that can search the web and visit web pages."""
DEFAULT_DESCRIPTION = "A helpful assistant with access to a web browser. Ask them to perform web searches, open pages, and interact with content (e.g., clicking links, scrolling the viewport, etc., filling in form fields, etc.) It can also summarize the entire page, or answer questions based on the content of the page. It can also be asked to sleep and wait for pages to load, in cases where the pages seem to be taking a while to load."
DEFAULT_START_PAGE = "https://www.bing.com/"
def __init__(
self,
name: str,
model_client: ChatCompletionClient,
description: str = DEFAULT_DESCRIPTION,
headless: bool = True,
browser_channel: str | None = None,
browser_data_dir: str | None = None,
start_page: str | None = None,
downloads_folder: str | None = None,
debug_dir: str | None = os.getcwd(),
to_save_screenshots: bool = False,
animate_actions: bool = False,
use_ocr: bool = True,
to_resize_viewport: bool = True,
playwright: Playwright | None = None,
context: BrowserContext | None = None,
):
"""
Initialize the MultimodalWebSurfer.
Args:
name (str): The agent's name
model_client (ChatCompletionClient): The model to use (must be multi-modal)
description (str): The agent's description used by the team. Defaults to DEFAULT_DESCRIPTION
headless (bool): Whether to run the browser in headless mode. Defaults to True.
browser_channel (str | type[DEFAULT_CHANNEL]): The browser channel to use. Defaults to DEFAULT_CHANNEL.
browser_data_dir (str | None): The directory to store browser data. Defaults to None.
start_page (str | None): The initial page to visit. Defaults to DEFAULT_START_PAGE.
downloads_folder (str | None): The folder to save downloads. Defaults to None.
debug_dir (str | None): The directory to save debug information. Defaults to the current working directory.
to_save_screenshots (bool): Whether to save screenshots. Defaults to False.
animate_actions (bool): Whether to animate actions. Defaults to False.
use_ocr (bool): Whether to use OCR to extract text from screenshots, otherwise extract text from page. Defaults to True.
to_resize_viewport (bool): Whether to resize the viewport. Defaults to True.
playwright (Playwright | None): The playwright instance to use. Defaults to None and creates a new one.
context (BrowserContext | None): The browser context to use. Defaults to None and creates a new one.
"""
super().__init__(name, description)
self._model_client = model_client
self.headless = headless
self.browser_channel = browser_channel
self.browser_data_dir = browser_data_dir
self.start_page = start_page or self.DEFAULT_START_PAGE
self.downloads_folder = downloads_folder
self.debug_dir = debug_dir
self.to_save_screenshots = to_save_screenshots
self.use_ocr = use_ocr
self.to_resize_viewport = to_resize_viewport
self.animate_actions = animate_actions
# Call init to set these in case not set
self._playwright: Playwright | None = playwright
self._context: BrowserContext | None = context
self._page: Page | None = None
self._last_download: Download | None = None
self._prior_metadata_hash: str | None = None
self.logger = logging.getLogger(EVENT_LOGGER_NAME + f".{self.name}.MultimodalWebSurfer")
self._chat_history: List[LLMMessage] = []
# Define the download handler
def _download_handler(download: Download) -> None:
self._last_download = download
self._download_handler = _download_handler
# Define the Playwright controller that handles the browser interactions
self._playwright_controller = PlaywrightController(
animate_actions=self.animate_actions,
downloads_folder=self.downloads_folder,
viewport_width=VIEWPORT_WIDTH,
viewport_height=VIEWPORT_HEIGHT,
_download_handler=self._download_handler,
to_resize_viewport=self.to_resize_viewport,
)
self.default_tools = [
TOOL_VISIT_URL,
TOOL_HISTORY_BACK,
TOOL_CLICK,
TOOL_TYPE,
TOOL_READ_PAGE_AND_ANSWER,
TOOL_SUMMARIZE_PAGE,
TOOL_SLEEP,
TOOL_HOVER,
]
self.did_lazy_init = False
@property
def produced_message_types(self) -> List[type[ChatMessage]]:
return [MultiModalMessage]
[docs]
async def on_messages(self, messages: Sequence[ChatMessage], cancellation_token: CancellationToken) -> Response:
for chat_message in messages:
if isinstance(chat_message, TextMessage | MultiModalMessage):
self._chat_history.append(UserMessage(content=chat_message.content, source=chat_message.source))
else:
raise ValueError(f"Unexpected message in MultiModalWebSurfer: {chat_message}")
try:
_, content = await self.__generate_reply(cancellation_token=cancellation_token)
if isinstance(content, str):
return Response(chat_message=TextMessage(content=content, source=self.name))
else:
return Response(chat_message=MultiModalMessage(content=content, source=self.name))
except BaseException:
return Response(
chat_message=TextMessage(content=f"Web surfing error:\n\n{traceback.format_exc()}", source=self.name)
)
[docs]
async def on_reset(self, cancellation_token: CancellationToken) -> None:
if not self.did_lazy_init:
return
assert self._page is not None
self._chat_history.clear()
reset_prior_metadata, reset_last_download = await self._playwright_controller.visit_page(
self._page, self.start_page
)
if reset_last_download and self._last_download is not None:
self._last_download = None
if reset_prior_metadata and self._prior_metadata_hash is not None:
self._prior_metadata_hash = None
if self.to_save_screenshots:
current_timestamp = "_" + int(time.time()).__str__()
screenshot_png_name = "screenshot" + current_timestamp + ".png"
await self._page.screenshot(path=os.path.join(self.debug_dir, screenshot_png_name)) # type: ignore
self.logger.info(
WebSurferEvent(
source=self.name,
url=self._page.url,
message="Screenshot: " + screenshot_png_name,
)
)
self.logger.info(
WebSurferEvent(
source=self.name,
url=self._page.url,
message="Resetting browser.",
)
)
async def _lazy_init(
self,
) -> None:
self._last_download = None
self._prior_metadata_hash = None
# Create the playwright self
launch_args: Dict[str, Any] = {"headless": self.headless}
if self.browser_channel is not None:
launch_args["channel"] = self.browser_channel
if self._playwright is None:
self._playwright = await async_playwright().start()
# Create the context -- are we launching persistent?
if self._context is None:
if self.browser_data_dir is None:
browser = await self._playwright.chromium.launch(**launch_args)
self._context = await browser.new_context(
user_agent="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36 Edg/122.0.0.0"
)
else:
self._context = await self._playwright.chromium.launch_persistent_context(
self.browser_data_dir, **launch_args
)
# Create the page
self._context.set_default_timeout(60000) # One minute
self._page = await self._context.new_page()
assert self._page is not None
# self._page.route(lambda x: True, self._route_handler)
self._page.on("download", self._download_handler)
if self.to_resize_viewport:
await self._page.set_viewport_size({"width": VIEWPORT_WIDTH, "height": VIEWPORT_HEIGHT})
await self._page.add_init_script(
path=os.path.join(os.path.abspath(os.path.dirname(__file__)), "page_script.js")
)
await self._page.goto(self.start_page)
await self._page.wait_for_load_state()
# Prepare the debug directory -- which stores the screenshots generated throughout the process
await self._set_debug_dir(self.debug_dir)
self.did_lazy_init = True
async def _set_debug_dir(self, debug_dir: str | None) -> None:
assert self._page is not None
self.debug_dir = debug_dir
if self.debug_dir is None:
return
if not os.path.isdir(self.debug_dir):
os.mkdir(self.debug_dir)
if self.to_save_screenshots:
current_timestamp = "_" + int(time.time()).__str__()
screenshot_png_name = "screenshot" + current_timestamp + ".png"
await self._page.screenshot(path=os.path.join(self.debug_dir, screenshot_png_name))
self.logger.info(
WebSurferEvent(
source=self.name,
url=self._page.url,
message="Screenshot: " + screenshot_png_name,
)
)
def _target_name(self, target: str, rects: Dict[str, InteractiveRegion]) -> str | None:
try:
return rects[target]["aria_name"].strip()
except KeyError:
return None
def _format_target_list(self, ids: List[str], rects: Dict[str, InteractiveRegion]) -> List[str]:
targets: List[str] = []
for r in list(set(ids)):
if r in rects:
# Get the role
aria_role = rects[r].get("role", "").strip()
if len(aria_role) == 0:
aria_role = rects[r].get("tag_name", "").strip()
# Get the name
aria_name = re.sub(r"[\n\r]+", " ", rects[r].get("aria_name", "")).strip()
# What are the actions?
actions = ['"click", "hover"']
if rects[r]["role"] in ["textbox", "searchbox", "search"]:
actions = ['"input_text"']
actions_str = "[" + ",".join(actions) + "]"
targets.append(f'{{"id": {r}, "name": "{aria_name}", "role": "{aria_role}", "tools": {actions_str} }}')
return targets
async def _execute_tool(
self,
message: List[FunctionCall],
rects: Dict[str, InteractiveRegion],
tool_names: str,
cancellation_token: Optional[CancellationToken] = None,
) -> Tuple[bool, UserContent]:
name = message[0].name
args = json.loads(message[0].arguments)
action_description = ""
assert self._page is not None
self.logger.info(
WebSurferEvent(
source=self.name,
url=self._page.url,
action=name,
arguments=args,
message=f"{name}( {json.dumps(args)} )",
)
)
if name == "visit_url":
url = args.get("url")
action_description = f"I typed '{url}' into the browser address bar."
# Check if the argument starts with a known protocol
if url.startswith(("https://", "http://", "file://", "about:")):
reset_prior_metadata, reset_last_download = await self._playwright_controller.visit_page(
self._page, url
)
# If the argument contains a space, treat it as a search query
elif " " in url:
reset_prior_metadata, reset_last_download = await self._playwright_controller.visit_page(
self._page, f"https://www.bing.com/search?q={quote_plus(url)}&FORM=QBLH"
)
# Otherwise, prefix with https://
else:
reset_prior_metadata, reset_last_download = await self._playwright_controller.visit_page(
self._page, "https://" + url
)
if reset_last_download and self._last_download is not None:
self._last_download = None
if reset_prior_metadata and self._prior_metadata_hash is not None:
self._prior_metadata_hash = None
elif name == "history_back":
action_description = "I clicked the browser back button."
await self._playwright_controller.back(self._page)
elif name == "web_search":
query = args.get("query")
action_description = f"I typed '{query}' into the browser search bar."
reset_prior_metadata, reset_last_download = await self._playwright_controller.visit_page(
self._page, f"https://www.bing.com/search?q={quote_plus(query)}&FORM=QBLH"
)
if reset_last_download and self._last_download is not None:
self._last_download = None
if reset_prior_metadata and self._prior_metadata_hash is not None:
self._prior_metadata_hash = None
elif name == "page_up":
action_description = "I scrolled up one page in the browser."
await self._playwright_controller.page_up(self._page)
elif name == "page_down":
action_description = "I scrolled down one page in the browser."
await self._playwright_controller.page_down(self._page)
elif name == "click":
target_id = str(args.get("target_id"))
target_name = self._target_name(target_id, rects)
if target_name:
action_description = f"I clicked '{target_name}'."
else:
action_description = "I clicked the control."
new_page_tentative = await self._playwright_controller.click_id(self._page, target_id)
if new_page_tentative is not None:
self._page = new_page_tentative
self._prior_metadata_hash = None
self.logger.info(
WebSurferEvent(
source=self.name,
url=self._page.url,
message="New tab or window.",
)
)
elif name == "input_text":
input_field_id = str(args.get("input_field_id"))
text_value = str(args.get("text_value"))
input_field_name = self._target_name(input_field_id, rects)
if input_field_name:
action_description = f"I typed '{text_value}' into '{input_field_name}'."
else:
action_description = f"I input '{text_value}'."
await self._playwright_controller.fill_id(self._page, input_field_id, text_value)
elif name == "scroll_element_up":
target_id = str(args.get("target_id"))
target_name = self._target_name(target_id, rects)
if target_name:
action_description = f"I scrolled '{target_name}' up."
else:
action_description = "I scrolled the control up."
await self._playwright_controller.scroll_id(self._page, target_id, "up")
elif name == "scroll_element_down":
target_id = str(args.get("target_id"))
target_name = self._target_name(target_id, rects)
if target_name:
action_description = f"I scrolled '{target_name}' down."
else:
action_description = "I scrolled the control down."
await self._playwright_controller.scroll_id(self._page, target_id, "down")
elif name == "answer_question":
question = str(args.get("question"))
action_description = f"I answered the following question '{question}' based on the web page."
# Do Q&A on the DOM. No need to take further action. Browser state does not change.
return False, await self._summarize_page(question=question, cancellation_token=cancellation_token)
elif name == "summarize_page":
# Summarize the DOM. No need to take further action. Browser state does not change.
action_description = "I summarized the current web page"
return False, await self._summarize_page(cancellation_token=cancellation_token)
elif name == "hover":
target_id = str(args.get("target_id"))
target_name = self._target_name(target_id, rects)
if target_name:
action_description = f"I hovered over '{target_name}'."
else:
action_description = "I hovered over the control."
await self._playwright_controller.hover_id(self._page, target_id)
elif name == "sleep":
action_description = "I am waiting a short period of time before taking further action."
await self._playwright_controller.sleep(self._page, 3) # There's a 2s sleep below too
else:
raise ValueError(f"Unknown tool '{name}'. Please choose from:\n\n{tool_names}")
await self._page.wait_for_load_state()
await self._playwright_controller.sleep(self._page, 3) # There's a 2s sleep below too
# Handle downloads
if self._last_download is not None and self.downloads_folder is not None:
fname = os.path.join(self.downloads_folder, self._last_download.suggested_filename)
# TODO: Fix this type
await self._last_download.save_as(fname) # type: ignore
page_body = f"<html><head><title>Download Successful</title></head><body style=\"margin: 20px;\"><h1>Successfully downloaded '{self._last_download.suggested_filename}' to local path:<br><br>{fname}</h1></body></html>"
await self._page.goto(
"data:text/html;base64," + base64.b64encode(page_body.encode("utf-8")).decode("utf-8")
)
await self._page.wait_for_load_state()
# Handle metadata
page_metadata = json.dumps(await self._playwright_controller.get_page_metadata(self._page), indent=4)
metadata_hash = hashlib.md5(page_metadata.encode("utf-8")).hexdigest()
if metadata_hash != self._prior_metadata_hash:
page_metadata = (
"\nThe following metadata was extracted from the webpage:\n\n" + page_metadata.strip() + "\n"
)
else:
page_metadata = ""
self._prior_metadata_hash = metadata_hash
# Describe the viewport of the new page in words
viewport = await self._playwright_controller.get_visual_viewport(self._page)
percent_visible = int(viewport["height"] * 100 / viewport["scrollHeight"])
percent_scrolled = int(viewport["pageTop"] * 100 / viewport["scrollHeight"])
if percent_scrolled < 1: # Allow some rounding error
position_text = "at the top of the page"
elif percent_scrolled + percent_visible >= 99: # Allow some rounding error
position_text = "at the bottom of the page"
else:
position_text = str(percent_scrolled) + "% down from the top of the page"
new_screenshot = await self._page.screenshot()
if self.to_save_screenshots:
current_timestamp = "_" + int(time.time()).__str__()
screenshot_png_name = "screenshot" + current_timestamp + ".png"
async with aiofiles.open(os.path.join(self.debug_dir, screenshot_png_name), "wb") as file: # type: ignore
await file.write(new_screenshot) # type: ignore
self.logger.info(
WebSurferEvent(
source=self.name,
url=self._page.url,
message="Screenshot: " + screenshot_png_name,
)
)
ocr_text = (
await self._get_ocr_text(new_screenshot, cancellation_token=cancellation_token)
if self.use_ocr is True
else await self._playwright_controller.get_webpage_text(self._page)
)
# Return the complete observation
message_content = "" # message.content or ""
page_title = await self._page.title()
return False, [
f"{message_content}\n\n{action_description}\n\nHere is a screenshot of [{page_title}]({self._page.url}). The viewport shows {percent_visible}% of the webpage, and is positioned {position_text}.{page_metadata}\nAutomatic OCR of the page screenshot has detected the following text:\n\n{ocr_text}".strip(),
AGImage.from_pil(PIL.Image.open(io.BytesIO(new_screenshot))),
]
async def __generate_reply(self, cancellation_token: CancellationToken) -> Tuple[bool, UserContent]:
"""Generates the actual reply. First calls the LLM to figure out which tool to use, then executes the tool."""
# Lazy init
if not self.did_lazy_init:
await self._lazy_init()
assert self._page is not None
# Clone the messages to give context, removing old screenshots
history: List[LLMMessage] = []
for m in self._chat_history:
if isinstance(m.content, str):
history.append(m)
elif isinstance(m.content, list):
content = message_content_to_str(m.content)
if isinstance(m, UserMessage):
history.append(UserMessage(content=content, source=m.source))
elif isinstance(m, AssistantMessage):
history.append(AssistantMessage(content=content, source=m.source))
elif isinstance(m, SystemMessage):
history.append(SystemMessage(content=content))
# Ask the page for interactive elements, then prepare the state-of-mark screenshot
rects = await self._playwright_controller.get_interactive_rects(self._page)
viewport = await self._playwright_controller.get_visual_viewport(self._page)
screenshot = await self._page.screenshot()
som_screenshot, visible_rects, rects_above, rects_below = add_set_of_mark(screenshot, rects)
if self.to_save_screenshots:
current_timestamp = "_" + int(time.time()).__str__()
screenshot_png_name = "screenshot_som" + current_timestamp + ".png"
som_screenshot.save(os.path.join(self.debug_dir, screenshot_png_name)) # type: ignore
self.logger.info(
WebSurferEvent(
source=self.name,
url=self._page.url,
message="Screenshot: " + screenshot_png_name,
)
)
# What tools are available?
tools = self.default_tools.copy()
tools.append(TOOL_WEB_SEARCH)
# We can scroll up
if viewport["pageTop"] > 5:
tools.append(TOOL_PAGE_UP)
# Can scroll down
if (viewport["pageTop"] + viewport["height"] + 5) < viewport["scrollHeight"]:
tools.append(TOOL_PAGE_DOWN)
# Focus hint
focused = await self._playwright_controller.get_focused_rect_id(self._page)
focused_hint = ""
if focused:
name = self._target_name(focused, rects)
if name:
name = f"(and name '{name}') "
role = "control"
try:
role = rects[focused]["role"]
except KeyError:
pass
focused_hint = f"\nThe {role} with ID {focused} {name}currently has the input focus.\n\n"
# Everything visible
visible_targets = "\n".join(self._format_target_list(visible_rects, rects)) + "\n\n"
# Everything else
other_targets: List[str] = []
other_targets.extend(self._format_target_list(rects_above, rects))
other_targets.extend(self._format_target_list(rects_below, rects))
if len(other_targets) > 0:
other_targets_str = (
"Additional valid interaction targets (not shown) include:\n" + "\n".join(other_targets) + "\n\n"
)
else:
other_targets_str = ""
# If there are scrollable elements, then add the corresponding tools
# has_scrollable_elements = False
# if has_scrollable_elements:
# tools.append(TOOL_SCROLL_ELEMENT_UP)
# tools.append(TOOL_SCROLL_ELEMENT_DOWN)
tool_names = "\n".join([t["name"] for t in tools])
text_prompt = WEB_SURFER_TOOL_PROMPT.format(
url=self._page.url,
visible_targets=visible_targets,
other_targets_str=other_targets_str,
focused_hint=focused_hint,
tool_names=tool_names,
).strip()
# Scale the screenshot for the MLM, and close the original
scaled_screenshot = som_screenshot.resize((MLM_WIDTH, MLM_HEIGHT))
som_screenshot.close()
if self.to_save_screenshots:
scaled_screenshot.save(os.path.join(self.debug_dir, "screenshot_scaled.png")) # type: ignore
# Add the multimodal message and make the request
history.append(UserMessage(content=[text_prompt, AGImage.from_pil(scaled_screenshot)], source=self.name))
response = await self._model_client.create(
history, tools=tools, extra_create_args={"tool_choice": "auto"}, cancellation_token=cancellation_token
) # , "parallel_tool_calls": False})
message = response.content
self._last_download = None
if isinstance(message, str):
# Answer directly
return False, message
elif isinstance(message, list):
# Take an action
return await self._execute_tool(message, rects, tool_names, cancellation_token=cancellation_token)
else:
# Not sure what happened here
raise AssertionError(f"Unknown response format '{message}'")
async def _get_ocr_text(
self, image: bytes | io.BufferedIOBase | PIL.Image.Image, cancellation_token: Optional[CancellationToken] = None
) -> str:
scaled_screenshot = None
if isinstance(image, PIL.Image.Image):
scaled_screenshot = image.resize((MLM_WIDTH, MLM_HEIGHT))
else:
pil_image = None
if not isinstance(image, io.BufferedIOBase):
pil_image = PIL.Image.open(io.BytesIO(image))
else:
# TODO: Not sure why this cast was needed, but by this point screenshot is a binary file-like object
pil_image = PIL.Image.open(cast(BinaryIO, image))
scaled_screenshot = pil_image.resize((MLM_WIDTH, MLM_HEIGHT))
pil_image.close()
# Add the multimodal message and make the request
messages: List[LLMMessage] = []
messages.append(
UserMessage(
content=[
WEB_SURFER_OCR_PROMPT,
AGImage.from_pil(scaled_screenshot),
],
source=self.name,
)
)
response = await self._model_client.create(messages, cancellation_token=cancellation_token)
scaled_screenshot.close()
assert isinstance(response.content, str)
return response.content
async def _summarize_page(
self,
question: str | None = None,
cancellation_token: Optional[CancellationToken] = None,
) -> str:
assert self._page is not None
page_markdown: str = await self._playwright_controller.get_page_markdown(self._page)
title: str = self._page.url
try:
title = await self._page.title()
except Exception:
pass
# Take a screenshot and scale it
screenshot = Image.open(io.BytesIO(await self._page.screenshot()))
scaled_screenshot = screenshot.resize((MLM_WIDTH, MLM_HEIGHT))
screenshot.close()
ag_image = AGImage.from_pil(scaled_screenshot)
# Prepare the system prompt
messages: List[LLMMessage] = []
messages.append(SystemMessage(content=WEB_SURFER_QA_SYSTEM_MESSAGE))
prompt = WEB_SURFER_QA_PROMPT(title, question)
# Grow the buffer (which is added to the prompt) until we overflow the context window or run out of lines
buffer = ""
# for line in re.split(r"([\r\n]+)", page_markdown):
for line in page_markdown.splitlines():
message = UserMessage(
# content=[
prompt + buffer + line,
# ag_image,
# ],
source=self.name,
)
remaining = self._model_client.remaining_tokens(messages + [message])
if remaining > SCREENSHOT_TOKENS:
buffer += line
else:
break
# Nothing to do
buffer = buffer.strip()
if len(buffer) == 0:
return "Nothing to summarize."
# Append the message
messages.append(
UserMessage(
content=[
prompt + buffer,
ag_image,
],
source=self.name,
)
)
# Generate the response
response = await self._model_client.create(messages, cancellation_token=cancellation_token)
scaled_screenshot.close()
assert isinstance(response.content, str)
return response.content
