backend/app/models/task.py

import uuid
from datetime import datetime, timezone
from enum import StrEnum

from sqlmodel import Field, SQLModel


class TaskStatus(StrEnum):
    QUEUED = "queued"
    PROCESSING = "processing"
    COMPLETED = "completed"
    FAILED = "failed"


class Task(SQLModel, table=True):
    __tablename__: str = "tasks"  # type: ignore

    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)

    status: TaskStatus = Field(default=TaskStatus.QUEUED)
    input_filename: str

    result_url: str | None = None
    error_message: str | None = None

    created_at: datetime = Field(
        default_factory=lambda: datetime.now(timezone.utc).replace(tzinfo=None)
    )