sqs.py

from __future__ import annotations

import logging
from typing import TYPE_CHECKING, Any

from aws_lambda_powertools.utilities.parser.envelopes.base import BaseEnvelope
from aws_lambda_powertools.utilities.parser.models import SqsModel

if TYPE_CHECKING:
    from aws_lambda_powertools.utilities.parser.types import Model

logger = logging.getLogger(__name__)


class SqsEnvelope(BaseEnvelope):
    """SQS Envelope to extract array of Records

    The record's body parameter is a string, though it can also be a JSON encoded string.
    Regardless of its type it'll be parsed into a BaseModel object.

    Note: Records will be parsed the same way so if model is str,
    all items in the list will be parsed as str and npt as JSON (and vice versa)
    """

    def parse(self, data: dict[str, Any] | Any | None, model: type[Model]) -> list[Model | None]:
        """Parses records found with model provided

        Parameters
        ----------
        data : dict
            Lambda event to be parsed
        model : type[Model]
            Data model provided to parse after extracting data using envelope

        Returns
        -------
        list
            List of records parsed with model provided
        """
        logger.debug(f"Parsing incoming data with SQS model {SqsModel}")
        parsed_envelope = SqsModel.model_validate(data)
        logger.debug(f"Parsing SQS records in `body` with {model}")
        return [self._parse(data=record.body, model=model) for record in parsed_envelope.Records]