145 lines
5.6 KiB
Python
145 lines
5.6 KiB
Python
# Copyright 2026 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Read-only access to live and stored session history.
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DataEngine implements HistoryReader for active sessions. OfflineHistoryReader
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opens an existing database and uses the same step renderer for trace inspection.
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"""
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from __future__ import annotations
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from pathlib import Path
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import sqlite3
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from typing import Any, Protocol, runtime_checkable
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from artemis.data_engine.engine import build_image_describer, friendly_step
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from artemis.data_engine.models import HistoryChunkRecord, StepRecord
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from artemis.data_engine.storage import StorageManager
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from artemis.utils.logger import get_logger
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logger = get_logger(__name__)
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__all__ = ["HistoryReader", "OfflineHistoryReader", "friendly_step"]
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@runtime_checkable
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class HistoryReader(Protocol):
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"""Everything the history tools need from a session's stored history."""
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session_start_time: float | None
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base_dir: Path
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storage: StorageManager
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def get_agent_friendly_steps(self) -> list[dict[str, Any]]: ...
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def get_agent_friendly_steps_in_range(
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self, start_step: int, end_step: int | None = None
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) -> list[dict[str, Any]]: ...
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def get_agent_friendly_step(self, step_number: int) -> dict[str, Any] | None: ...
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def get_step_record(self, step_number: int) -> StepRecord | None: ...
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def get_step_image_path(self, step_number: int, which: str = "pre") -> Path | None: ...
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def get_image_path(self, image_name: str) -> Path: ...
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def get_history_chunks(self) -> list[HistoryChunkRecord]: ...
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class OfflineHistoryReader:
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"""Read-only history of one session straight from the traces database.
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``traces_dir`` is the traces root (``data_engine.db`` and ``images/`` live
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there); ``base_dir`` resolves to the session's own directory, where its
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notes are stored — the same layout the live ``DataEngine`` writes.
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"""
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def __init__(self, db_path: str | Path, traces_dir: str | Path, session_id: Any):
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self.global_base_dir = Path(traces_dir)
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self.session_id = str(session_id)
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self.storage = StorageManager(db_path, traces_dir, read_only=True)
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self.base_dir = self.global_base_dir / self.session_id
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self.session_start_time: float | None = None
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try:
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session = self.storage.get_session(self.session_id)
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self.session_start_time = session.start_time if session else None
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except (sqlite3.Error, ValueError) as e:
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logger.debug(f"Session clock unavailable for {self.session_id}: {e}")
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# --- Images ----------------------------------------------------------------------
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def get_image_path(self, image_name: str) -> Path:
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return self.global_base_dir / "images" / f"{image_name}.jpg"
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def get_step_image_path(self, step_number: int, which: str = "pre") -> Path | None:
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from artemis.data_engine.step_evidence import step_image_name
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step = self.get_step_record(step_number)
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if step is None:
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return None
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image_name = step_image_name(step, which)
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if not image_name:
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return None
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path = self.get_image_path(image_name)
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return path if path.exists() else None
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# --- Steps -----------------------------------------------------------------------
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def _steps(self) -> list[StepRecord]:
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return self.storage.get_steps(self.session_id) or []
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def _friendly(self, step: StepRecord, describer) -> dict[str, Any]:
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traces = self.storage.get_traces_for_step(step.step_id)
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return friendly_step(step, traces, describer, session_start_time=self.session_start_time)
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def get_agent_friendly_steps(self) -> list[dict[str, Any]]:
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steps = self._steps()
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describer = build_image_describer(steps)
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return [self._friendly(step, describer) for step in steps]
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def get_agent_friendly_steps_in_range(
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self, start_step: int, end_step: int | None = None
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) -> list[dict[str, Any]]:
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end_step = start_step if end_step is None else end_step
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if start_step > end_step:
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start_step, end_step = end_step, start_step
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steps = self._steps()
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describer = build_image_describer(steps)
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return [
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self._friendly(step, describer)
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for step in steps
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if start_step <= step.step_number <= end_step
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]
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def get_agent_friendly_step(self, step_number: int) -> dict[str, Any] | None:
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rows = self.get_agent_friendly_steps_in_range(step_number, step_number)
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return rows[0] if rows else None
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def get_step_record(self, step_number: int) -> StepRecord | None:
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for step in self._steps():
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if step.step_number == step_number:
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return step
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return None
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# --- Chunks ----------------------------------------------------------------------
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def get_history_chunks(self) -> list[HistoryChunkRecord]:
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try:
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return self.storage.get_history_chunks(self.session_id)
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except (sqlite3.Error, ValueError) as e:
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logger.debug(f"History chunks unavailable for {self.session_id}: {e}")
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return []
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