Function _history_from_events

browser_use/beta/service.py:3980–4040

(
	events: list[dict[str, Any]],
	*,
	model: str,
	started: float,
	finished: float,
	output_model_schema: type[AgentStructuredOutput] | None,
	process_error: str | None,
)

def _history_from_events(
	events: list[dict[str, Any]],
	*,
	model: str,
	started: float,
	finished: float,
	output_model_schema: type[AgentStructuredOutput] | None,
	process_error: str | None,
) -> AgentHistoryList[AgentStructuredOutput]:
	events = _events_after_terminal_rollbacks(_events_after_terminal_compaction(events))
	final_result = _structured_result_text(_result_from_events(events), output_model_schema)
	failure = process_error or _failure_from_events(events)
	if final_result is None and failure is not None:
		final_result = _structured_result_text(_last_streamed_assistant_text_from_events(events), output_model_schema)
	if final_result is None and failure is None:
		failure = _recoverable_failure_from_events(events)
	if final_result is None and failure is None:
		failure = 'Rust terminal session did not produce a final result.'
	is_done = final_result is not None and failure is None
	attachments = _attachments_from_events(events)
	history_items = _history_items_from_terminal_turns(
		events,
		started=started,
		finished=finished,
		final_result=final_result,
		attachments=attachments,
		failure=failure,
		is_done=is_done,
	)
	if history_items is not None:
		history_list: AgentHistoryList[AgentStructuredOutput] = AgentHistoryList(
			history=history_items,
			usage=_usage_from_events(events, model),
		)
		history_list._output_model_schema = output_model_schema
		return history_list
	tool_calls = _tool_calls_with_final_done(
		_tool_started_calls(events),
		final_result=final_result,
		attachments=attachments,
		is_done=is_done,
	)
	history = AgentHistory(
		model_output=_model_output_from_tool_calls(tool_calls, events),
		result=_action_results_from_tool_calls(
			tool_calls,
			events,
			final_result=final_result,
			attachments=attachments,
			failure=failure,
			is_done=is_done,
		),
		state=_browser_state_from_events(events),
		metadata=StepMetadata(step_start_time=started, step_end_time=finished, step_number=max(1, len(events))),
	)
	history_list: AgentHistoryList[AgentStructuredOutput] = AgentHistoryList(
		history=[history],
		usage=_usage_from_events(events, model),