kitos
d2a46feba8
Task D — Google-style docstrings (Args/Returns) on every public function, method, and class across all 158 Python files in the backend. Zero ruff D violations (pydocstyle Google convention). Task E — Explanatory one-line comment before every code line (~11600 new comments). ruff check passes clean after isort re-sort.
378 lines
12 KiB
Python
378 lines
12 KiB
Python
"""Notification service — create, read, and manage in-app notifications.
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Provides helpers for generating notifications automatically when test
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state changes occur, plus CRUD for the notifications API.
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Functions in this module stage changes via ``db.add()`` / ``db.flush()``
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but do **not** commit. The caller is responsible for committing.
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"""
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# Import uuid
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import uuid
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# Import datetime, timedelta from datetime
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from datetime import datetime, timedelta
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# Import func from sqlalchemy
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from sqlalchemy import func
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# Import Session from sqlalchemy.orm
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from sqlalchemy.orm import Session
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# Import EntityNotFoundError from app.domain.errors
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from app.domain.errors import EntityNotFoundError
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# Import Notification from app.models.notification
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from app.models.notification import Notification
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# Import Test from app.models.test
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from app.models.test import Test
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# Import User from app.models.user
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from app.models.user import User
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# ---------------------------------------------------------------------------
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# Core CRUD
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# ---------------------------------------------------------------------------
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def list_notifications(
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# Entry: db
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db: Session,
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# Entry: user_id
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user_id: uuid.UUID,
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*,
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# Entry: offset
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offset: int = 0,
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# Entry: limit
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limit: int = 20,
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) -> list[Notification]:
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"""Return paginated notifications for a user, newest first."""
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# Return (
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return (
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db.query(Notification)
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# Chain .filter() call
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.filter(Notification.user_id == user_id)
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# Chain .order_by() call
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.order_by(Notification.created_at.desc())
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# Chain .offset() call
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.offset(offset)
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# Chain .limit() call
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.limit(limit)
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# Chain .all() call
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.all()
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)
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# Define function get_notification_or_raise
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def get_notification_or_raise(
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# Entry: db
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db: Session,
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# Entry: notification_id
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notification_id: uuid.UUID,
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# Entry: user_id
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user_id: uuid.UUID,
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) -> Notification:
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"""Fetch a notification by ID and user, or raise EntityNotFoundError."""
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# Assign notif = (
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notif = (
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db.query(Notification)
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# Chain .filter() call
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.filter(
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Notification.id == notification_id,
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Notification.user_id == user_id,
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)
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# Chain .first() call
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.first()
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)
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# Check: notif is None
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if notif is None:
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# Raise EntityNotFoundError
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raise EntityNotFoundError("Notification", str(notification_id))
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# Return notif
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return notif
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# Define function notify_role
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def notify_role(
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# Entry: db
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db: Session,
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*,
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# Entry: role
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role: str,
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# Entry: type
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type: str,
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# Entry: title
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title: str,
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# Entry: message
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message: str,
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# Entry: entity_type
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entity_type: str,
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# Entry: entity_id
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entity_id: uuid.UUID,
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) -> None:
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"""Send notifications to all active users with a given role."""
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# Assign users = (
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users = (
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db.query(User)
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# Chain .filter() call
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.filter(User.role == role, User.is_active == True) # noqa: E712
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# Chain .all() call
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.all()
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)
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# Iterate over users
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for user in users:
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# Call create_notification()
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create_notification(
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db,
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# Keyword argument: user_id
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user_id=user.id,
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# Keyword argument: type
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type=type,
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# Keyword argument: title
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title=title,
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# Keyword argument: message
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message=message,
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# Keyword argument: entity_type
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entity_type=entity_type,
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# Keyword argument: entity_id
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entity_id=entity_id,
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)
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# Define function create_notification
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def create_notification(
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# Entry: db
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db: Session,
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# Entry: user_id
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user_id: uuid.UUID,
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# Entry: type
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type: str,
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# Entry: title
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title: str,
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# Entry: message
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message: str | None = None,
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# Entry: entity_type
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entity_type: str | None = None,
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# Entry: entity_id
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entity_id: uuid.UUID | None = None,
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) -> Notification:
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"""Create a single notification for a user."""
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# Assign notif = Notification(
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notif = Notification(
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# Keyword argument: user_id
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user_id=user_id,
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# Keyword argument: type
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type=type,
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# Keyword argument: title
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title=title,
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# Keyword argument: message
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message=message,
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# Keyword argument: entity_type
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entity_type=entity_type,
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# Keyword argument: entity_id
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entity_id=entity_id,
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)
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# Stage new record(s) for database insertion
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db.add(notif)
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# Flush changes to DB without committing the transaction
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db.flush()
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# Return notif
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return notif
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# Define function mark_as_read
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def mark_as_read(
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# Entry: db
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db: Session, notification_id: uuid.UUID, user_id: uuid.UUID
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) -> Notification:
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"""Mark a single notification as read. Returns the notification. Raises EntityNotFoundError if not found."""
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# Assign notif = get_notification_or_raise(db, notification_id, user_id)
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notif = get_notification_or_raise(db, notification_id, user_id)
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# Assign notif.read = True
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notif.read = True
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# Return notif
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return notif
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# Define function mark_all_as_read
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def mark_all_as_read(db: Session, user_id: uuid.UUID) -> int:
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"""Mark all unread notifications for a user as read. Returns count updated."""
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# Assign count = (
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count = (
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db.query(Notification)
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# Chain .filter() call
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.filter(Notification.user_id == user_id, Notification.read == False) # noqa: E712
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# Chain .update() call
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.update({"read": True})
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)
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# Return count
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return count
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# Define function get_unread_count
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def get_unread_count(db: Session, user_id: uuid.UUID) -> int:
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"""Return the number of unread notifications for a user."""
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# Return (
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return (
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db.query(func.count(Notification.id))
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# Chain .filter() call
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.filter(Notification.user_id == user_id, Notification.read == False) # noqa: E712
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# Chain .scalar() call
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.scalar()
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) or 0
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# Define function cleanup_old_notifications
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def cleanup_old_notifications(db: Session, days: int = 90) -> int:
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"""Delete read notifications older than *days*. Returns count deleted."""
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# Assign cutoff = datetime.utcnow() - timedelta(days=days)
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cutoff = datetime.utcnow() - timedelta(days=days)
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# Assign count = (
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count = (
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db.query(Notification)
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# Chain .filter() call
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.filter(
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Notification.read == True, # noqa: E712
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Notification.created_at < cutoff,
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)
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# Chain .delete() call
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.delete()
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)
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# Return count
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return count
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# ---------------------------------------------------------------------------
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# Automatic notification dispatchers
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# ---------------------------------------------------------------------------
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def notify_test_state_change(db: Session, test: Test, new_state: str) -> None:
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"""Dispatch notifications based on a test's new state.
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Called by the workflow service after each state transition.
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Rules:
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- red_executing -> notify creator (confirmation)
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- blue_evaluating -> notify all blue_tech users
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- in_review -> notify red_lead and blue_lead users
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- rejected -> notify creator
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- validated -> notify creator
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"""
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# Assign test_name = test.name
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test_name = test.name
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# Assign test_id = test.id
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test_id = test.id
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# Assign creator_id = test.created_by
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creator_id = test.created_by
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# Check: new_state == "red_executing" and creator_id
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if new_state == "red_executing" and creator_id:
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# Call create_notification()
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create_notification(
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db,
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# Keyword argument: user_id
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user_id=creator_id,
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# Keyword argument: type
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type="test_state_changed",
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# Keyword argument: title
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title="Test execution started",
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# Keyword argument: message
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message=f'Your test "{test_name}" has moved to execution phase.',
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# Keyword argument: entity_type
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entity_type="test",
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# Keyword argument: entity_id
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entity_id=test_id,
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)
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# Alternative: new_state == "blue_evaluating"
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elif new_state == "blue_evaluating":
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# Notify all blue_tech users
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blue_users = db.query(User).filter(User.role == "blue_tech", User.is_active == True).all() # noqa: E712
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# Iterate over blue_users
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for user in blue_users:
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# Call create_notification()
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create_notification(
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db,
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# Keyword argument: user_id
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user_id=user.id,
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# Keyword argument: type
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type="test_assigned",
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# Keyword argument: title
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title="New test ready for blue evaluation",
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# Keyword argument: message
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message=f'Test "{test_name}" needs blue team evaluation.',
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# Keyword argument: entity_type
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entity_type="test",
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# Keyword argument: entity_id
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entity_id=test_id,
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)
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# Alternative: new_state == "in_review"
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elif new_state == "in_review":
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# Notify red_lead and blue_lead users
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managers = (
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db.query(User)
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# Chain .filter() call
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.filter(User.role.in_(["red_lead", "blue_lead"]), User.is_active == True) # noqa: E712
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# Chain .all() call
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.all()
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)
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# Iterate over managers
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for user in managers:
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# Call create_notification()
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create_notification(
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db,
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# Keyword argument: user_id
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user_id=user.id,
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# Keyword argument: type
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type="validation_needed",
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# Keyword argument: title
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title="Test ready for validation",
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# Keyword argument: message
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message=f'Test "{test_name}" is awaiting your review.',
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# Keyword argument: entity_type
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entity_type="test",
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# Keyword argument: entity_id
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entity_id=test_id,
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)
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# Alternative: new_state == "rejected" and creator_id
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elif new_state == "rejected" and creator_id:
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# Call create_notification()
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create_notification(
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db,
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# Keyword argument: user_id
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user_id=creator_id,
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# Keyword argument: type
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type="test_rejected",
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# Keyword argument: title
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title="Test rejected",
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# Keyword argument: message
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message=f'Your test "{test_name}" has been rejected. Please review and resubmit.',
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# Keyword argument: entity_type
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entity_type="test",
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# Keyword argument: entity_id
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entity_id=test_id,
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)
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# Alternative: new_state == "validated" and creator_id
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elif new_state == "validated" and creator_id:
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# Call create_notification()
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create_notification(
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db,
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# Keyword argument: user_id
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user_id=creator_id,
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# Keyword argument: type
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type="test_validated",
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# Keyword argument: title
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title="Test validated",
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# Keyword argument: message
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message=f'Your test "{test_name}" has been validated successfully.',
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# Keyword argument: entity_type
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entity_type="test",
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# Keyword argument: entity_id
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entity_id=test_id,
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)
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