"""This module contains utility functions shared across the api package."""
from typing import (
Any,
Dict,
List,
Optional,
Set,
)
from fastapi import (
Query,
Request,
)
from galaxy.schema import (
FilterQueryParams,
SerializationParams,
ValueFilterQueryParams,
)
from galaxy.schema.schema import UpdateDatasetPermissionsPayload
from galaxy.util import listify
SerializationViewQueryParam: Optional[str] = Query(
None,
title="View",
description="View to be passed to the serializer",
)
SerializationKeysQueryParam: Optional[str] = Query(
None,
title="Keys",
description="Comma-separated list of keys to be passed to the serializer",
)
FilterQueryQueryParam: Optional[List[str]] = Query(
default=None,
title="Filter Query",
description="Generally a property name to filter by followed by an (often optional) hyphen and operator string.",
example="create_time-gt",
)
FilterValueQueryParam: Optional[List[str]] = Query(
default=None,
title="Filter Value",
description="The value to filter by.",
example="2015-01-29",
)
[docs]def parse_serialization_params(
view: Optional[str] = None,
keys: Optional[str] = None,
default_view: Optional[str] = None,
**_, # Additional params are ignored
) -> SerializationParams:
key_list = None
if keys:
key_list = keys.split(",")
return SerializationParams(view=view, keys=key_list, default_view=default_view)
[docs]def query_serialization_params(
view: Optional[str] = SerializationViewQueryParam,
keys: Optional[str] = SerializationKeysQueryParam,
) -> SerializationParams:
return parse_serialization_params(view=view, keys=keys)
[docs]def get_value_filter_query_params(
q: Optional[List[str]] = FilterQueryQueryParam,
qv: Optional[List[str]] = FilterValueQueryParam,
) -> ValueFilterQueryParams:
"""
This function is meant to be used as a Dependency.
See https://fastapi.tiangolo.com/tutorial/dependencies/#first-steps
"""
return ValueFilterQueryParams(
q=q,
qv=qv,
)
[docs]def get_filter_query_params(
q: Optional[List[str]] = FilterQueryQueryParam,
qv: Optional[List[str]] = FilterValueQueryParam,
offset: Optional[int] = Query(
default=0,
ge=0,
title="Offset",
description="Starts at the beginning skip the first ( offset - 1 ) items and begin returning at the Nth item",
),
limit: Optional[int] = Query(
default=None,
ge=1,
title="Limit",
description="The maximum number of items to return.",
),
order: Optional[str] = Query(
default=None,
title="Order",
description=(
"String containing one of the valid ordering attributes followed (optionally) "
"by '-asc' or '-dsc' for ascending and descending order respectively. "
"Orders can be stacked as a comma-separated list of values."
),
example="name-dsc,create_time",
),
) -> FilterQueryParams:
"""
This function is meant to be used as a Dependency.
See https://fastapi.tiangolo.com/tutorial/dependencies/#first-steps
"""
return FilterQueryParams(
q=q,
qv=qv,
offset=offset,
limit=limit,
order=order,
)
[docs]def get_update_permission_payload(payload: Dict[str, Any]) -> UpdateDatasetPermissionsPayload:
"""Converts the generic payload dictionary into a UpdateDatasetPermissionsPayload model with custom parsing.
This is an attempt on supporting multiple aliases for the permissions params."""
# There are several allowed names for the same role list parameter, i.e.: `access`, `access_ids`, `access_ids[]`
# The `access_ids[]` name is not pydantic friendly, so this will be modelled as an alias but we can only set one alias
# TODO: Maybe we should choose only one way/naming and deprecate the others?
payload["access_ids"] = payload.get("access_ids[]") or payload.get("access")
payload["manage_ids"] = payload.get("manage_ids[]") or payload.get("manage")
payload["modify_ids"] = payload.get("modify_ids[]") or payload.get("modify")
update_payload = UpdateDatasetPermissionsPayload(**payload)
return update_payload
[docs]def get_query_parameters_from_request_excluding(request: Request, exclude: Set[str]) -> dict:
"""Gets all the request query parameters excluding the given parameters names in `exclude` set.
This is useful when an endpoint uses arbitrary or dynamic query parameters that
cannot be anticipated or documented beforehand. The `exclude` set can be used to avoid
including those parameters that are already handled by the endpoint.
"""
extra_params = request.query_params._dict
for param_name in exclude:
extra_params.pop(param_name, None)
return extra_params
[docs]def query_parameter_as_list(query):
"""Used as FastAPI dependable for query parameters that need to behave as a list of values separated by comma
or as multiple instances of the same parameter.
.. important:: the ``query`` annotation provided must define the ``alias`` exactly as the name of the actual parameter name.
Usage example::
ValueQueryParam = Query(
default=None,
alias="value", # Important! this is the parameter name that will be displayed in the API docs
title="My Value",
description="A single value, a comma-separated list of values or a list of values.",
)
@router.get("/api/my_route")
def index(
self,
values: Optional[List[str]] = Depends(query_parameter_as_list(ValueQueryParam)),
):
...
This will render in the API docs as a single string query parameter but will make the following requests equivalent:
- ``api/my_route?value=val1,val2,val3``
- ``api/my_route?value=val1&value=val2&value=val3``
"""
def parse_elements(
elements: Optional[List[str]] = query,
) -> Optional[List[Any]]:
if query.default != Ellipsis and not elements:
return query.default
if elements and len(elements) == 1:
return listify(elements[0])
return elements
return parse_elements