"""Connector for AWS S3."""

import boto3


def get_s3_client():
    """Get s3 client."""
    return boto3.client('s3')


def create_presigned_url(client, bucket, key, expiration=10):
    """Generate a temporary presigned url.

    Args:
        client (boto3.S3Client): The s3 client.
        bucket (str): Name of s3 bucket.
        key (srt): Name of existing s3 object key.
        expiration (int): Number of seconds the url is valid. Defaults to ten seconds.
    Returns: str: Presigned url.

    """
    return client.generate_presigned_url(
        ClientMethod='get_object',
        ExpiresIn=expiration,
        Params={'Bucket': bucket, 'Key': key},
    )