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Dir : //proc/self/root/opt/saltstack/salt/lib/python3.10/site-packages/salt/states/postgres_schema.py

"""
Management of PostgreSQL schemas
================================

The postgres_schemas module is used to create and manage Postgres schemas.

.. code-block:: yaml

    public:
      postgres_schema.present 'dbname' 'name'
"""

import logging

log = logging.getLogger(__name__)


def __virtual__():
    """
    Only load if the postgres module is present
    """
    if "postgres.schema_exists" not in __salt__:
        return (
            False,
            "Unable to load postgres module.  Make sure `postgres.bins_dir` is set.",
        )
    return True


def present(
    dbname,
    name,
    owner=None,
    user=None,
    db_user=None,
    db_password=None,
    db_host=None,
    db_port=None,
):
    """
    Ensure that the named schema is present in the database.

    dbname
        The database's name will work on

    name
        The name of the schema to manage

    user
        system user all operations should be performed on behalf of

    db_user
        database username if different from config or default

    db_password
        user password if any password for a specified user

    db_host
        Database host if different from config or default

    db_port
        Database port if different from config or default
    """
    ret = {
        "dbname": dbname,
        "name": name,
        "changes": {},
        "result": True,
        "comment": f"Schema {name} is already present in database {dbname}",
    }

    db_args = {
        "db_user": db_user,
        "db_password": db_password,
        "db_host": db_host,
        "db_port": db_port,
        "user": user,
    }

    # check if schema exists
    schema_attr = __salt__["postgres.schema_get"](dbname, name, **db_args)

    cret = None

    # The schema is not present, make it!
    if schema_attr is None:
        if __opts__["test"]:
            ret["result"] = None
            ret["comment"] = "Schema {} is set to be created in database {}.".format(
                name, dbname
            )
            return ret
        cret = __salt__["postgres.schema_create"](dbname, name, owner=owner, **db_args)
    else:
        msg = "Schema {0} already exists in database {1}"
        cret = None

    if cret:
        msg = "Schema {0} has been created in database {1}"
        ret["result"] = True
        ret["changes"][name] = "Present"
    elif cret is not None:
        msg = "Failed to create schema {0} in database {1}"
        ret["result"] = False
    else:
        msg = "Schema {0} already exists in database {1}"
        ret["result"] = True

    ret["comment"] = msg.format(name, dbname)
    return ret


def absent(
    dbname, name, user=None, db_user=None, db_password=None, db_host=None, db_port=None
):
    """
    Ensure that the named schema is absent.

    dbname
        The database's name will work on

    name
        The name of the schema to remove

    user
        system user all operations should be performed on behalf of

    db_user
        database username if different from config or default

    db_password
        user password if any password for a specified user

    db_host
        Database host if different from config or default

    db_port
        Database port if different from config or default
    """
    ret = {"name": name, "dbname": dbname, "changes": {}, "result": True, "comment": ""}

    db_args = {
        "db_user": db_user,
        "db_password": db_password,
        "db_host": db_host,
        "db_port": db_port,
        "user": user,
    }

    # check if schema exists and remove it
    if __salt__["postgres.schema_exists"](dbname, name, **db_args):
        if __opts__["test"]:
            ret["result"] = None
            ret["comment"] = "Schema {} is set to be removed from database {}".format(
                name, dbname
            )
            return ret
        elif __salt__["postgres.schema_remove"](dbname, name, **db_args):
            ret["comment"] = "Schema {} has been removed from database {}".format(
                name, dbname
            )
            ret["changes"][name] = "Absent"
            return ret
        else:
            ret["result"] = False
            ret["comment"] = f"Schema {name} failed to be removed"
            return ret
    else:
        ret["comment"] = (
            "Schema {} is not present in database {}, so it cannot be removed".format(
                name, dbname
            )
        )

    return ret