"""spec_current — текущее состояние спецификации."""
from connection import query


def list_by_contract(contract_id):
    """Return list of dicts with name_hash, name, price, qty, sum, date_start."""
    return query(
        """SELECT name_hash, name, price, qty, sum, date_start
           FROM spec_current WHERE contract_id = %s ORDER BY name""",
        (contract_id,),
    )


def get_elements_json(document_id):
    """Get elements_json for a document."""
    rows = query(
        "SELECT elements_json FROM documents WHERE id = %s", (document_id,)
    )
    return rows[0]["elements_json"] if rows and rows[0]["elements_json"] else None