attachment_manager.py DOX

Purpose

• Own the attachment_manager.py helper module.
• This module tracks uploaded or generated attachments associated with chat contexts.
• Keep this file-level DOX profile synchronized with attachment_manager.py because this directory is intentionally flat.

Ownership

• attachment_manager.py owns the runtime implementation.
• attachment_manager.py.dox.md owns durable notes about responsibilities, contracts, side effects, and verification for that implementation.
• Classes:
• AttachmentManager (no explicit base class)
  • is_allowed_file(self, filename: str) -> bool
  • get_file_type(self, filename: str) -> str
  • get_file_extension(filename: str) -> str
  • validate_mime_type(self, file) -> bool
  • save_file(self, file: FileStorage, name: str) -> Tuple[str, Dict]
  • generate_image_preview(self, image_path: str, max_size: int=...) -> Optional[str]

Runtime Contracts

• Helper modules own reusable framework APIs and must preserve public callers unless all callers, tests, and docs are updated together.
• Update this file whenever public functions, classes, persistence behavior, path/security assumptions, side effects, or cross-module contracts change.
• Observed side-effect areas: filesystem reads, filesystem writes, settings/state persistence.
• Imported dependency areas include: PIL, base64, helpers.print_style, helpers.security, io, os, typing, werkzeug.datastructures.

Key Concepts

• Important called helpers/classes observed in the source: os.makedirs, self.get_file_extension, set.union, filename.rsplit.lower, safe_filename, os.path.join, self.get_file_type, file.save, ValueError, self.generate_image_preview, PrintStyle.error, img.thumbnail, io.BytesIO, img.save, base64.b64encode.decode, mime_type.split, img.convert, filename.rsplit, base64.b64encode, buffer.getvalue.
• Keep request/response, tool, or helper semantics documented here at the same time as source changes.

Work Guidance

• Preserve public helper APIs used by core code and plugins unless every caller is updated.
• Keep path, auth, secret, persistence, network, and subprocess behavior explicit and bounded.
• Prefer adding cohesive helper functions here only when behavior is reused across modules.

Verification

• Run targeted tests for changed helper behavior; run security regressions for auth, filesystem, WebSocket, tunnel, upload, or secret-handling helpers.
• No direct test reference was found by name search; choose the nearest behavioral test or perform a focused smoke check.

Child DOX Index

No child DOX files.