98 lines
2.7 KiB
Python
98 lines
2.7 KiB
Python
from __future__ import annotations
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import mimetypes
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import re
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from datetime import UTC, datetime
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from pathlib import Path
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from core.protocol import Attachment
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def _sanitize_component(value: str) -> str:
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cleaned = re.sub(r"[^A-Za-z0-9._-]+", "_", value)
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cleaned = cleaned.strip("._-")
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return cleaned or "unknown"
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def _default_filename(attachment: Attachment) -> str:
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if attachment.filename:
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return attachment.filename
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extension = mimetypes.guess_extension(attachment.mime_type or "") or ""
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base = {
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"image": "image",
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"audio": "audio",
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"video": "video",
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"document": "attachment",
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}.get(attachment.type, "attachment")
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return f"{base}{extension}"
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def build_workspace_attachment_path(
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*,
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workspace_root: Path,
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matrix_user_id: str,
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room_id: str,
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filename: str,
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timestamp: str | None = None,
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) -> tuple[str, Path]:
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stamp = timestamp or datetime.now(UTC).strftime("%Y%m%d-%H%M%S")
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safe_user = _sanitize_component(matrix_user_id.lstrip("@"))
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safe_room = _sanitize_component(room_id.lstrip("!"))
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safe_name = _sanitize_component(filename) or "attachment.bin"
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relative_path = (
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Path("surfaces") / "matrix" / safe_user / safe_room / "inbox" / f"{stamp}-{safe_name}"
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)
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return relative_path.as_posix(), workspace_root / relative_path
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async def download_matrix_attachment(
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*,
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client,
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workspace_root: Path,
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matrix_user_id: str,
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room_id: str,
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attachment: Attachment,
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timestamp: str | None = None,
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) -> Attachment:
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if not attachment.url:
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return attachment
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filename = _default_filename(attachment)
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relative_path, absolute_path = build_workspace_attachment_path(
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workspace_root=workspace_root,
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matrix_user_id=matrix_user_id,
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room_id=room_id,
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filename=filename,
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timestamp=timestamp,
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)
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absolute_path.parent.mkdir(parents=True, exist_ok=True)
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response = await client.download(attachment.url)
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body = getattr(response, "body", None)
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if body is None:
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raise RuntimeError(f"Matrix download response for {attachment.url} has no body")
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absolute_path.write_bytes(body)
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return Attachment(
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type=attachment.type,
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url=attachment.url,
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filename=filename,
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mime_type=attachment.mime_type,
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workspace_path=relative_path,
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)
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def resolve_workspace_attachment_path(workspace_root: Path, workspace_path: str) -> Path:
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path = Path(workspace_path)
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if path.is_absolute():
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return path
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return workspace_root / path
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def matrix_msgtype_for_attachment(attachment: Attachment) -> str:
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return {
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"image": "m.image",
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"audio": "m.audio",
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"video": "m.video",
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}.get(attachment.type, "m.file")
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