imaging_api.services.users

Attributes

XNAT_URL

Functions

get_xnat_users(→ list[imaging_api.routers.schemas.User])	Gets all users from XNAT.
to_create_imaging_user(...)	Converts central hub user (mainly email) to an XNAT CreateUser object.
get_user_profile_by(→ imaging_api.routers.schemas.User)	Fetches a user profile from XNAT using the key and value.
user_exists(→ bool)	Checks if a user exists in XNAT.
create_user_from_central_hub_user(...)	Convert central hub user to XNAT CreateUser request object, and create user on XNAT.
create_user(→ imaging_api.routers.schemas.User)	Core logic to create an XNAT user. Returns the newly created user profile.
add_user_to_project(→ imaging_api.routers.schemas.User)	Adds a user to a project in XNAT.

Module Contents

imaging_api.services.users.XNAT_URL = 'http://xnat-web:8080'

imaging_api.services.users.get_xnat_users(headers: dict[str, str]) → list[imaging_api.routers.schemas.User]

Gets all users from XNAT.

Parameters:

headers (dict[str, str]) – XNAT authentication headers.

Returns:

List of XNAT users.

Return type:

list[imaging_api.routers.schemas.User]

Raises:

Exception – If XNAT returns a non-200 response.

imaging_api.services.users.to_create_imaging_user(user: imaging_api.routers.schemas.CentralHubUser, headers: dict[str, str]) → imaging_api.routers.schemas.CreateUser

Converts central hub user (mainly email) to an XNAT CreateUser object.

XNAT usernames are unique, so we have to create a unique XNAT username from the email address. We first grab the part of the email before ‘@’. If the username already exists, we append a number suffix to make it unique.

Parameters:

• user (imaging_api.routers.schemas.CentralHubUser) – The user’s details on the Central Hub.

• headers (dict[str, str]) – XNAT authentication headers.

Returns:

XNAT user creation request object.

Return type:

imaging_api.routers.schemas.CreateUser

Raises:

Exception – If fetching existing XNAT users fails.

imaging_api.services.users.get_user_profile_by(key: str, value: str, headers: dict[str, str]) → imaging_api.routers.schemas.User

Fetches a user profile from XNAT using the key and value.

Parameters:

• key (str) – The key to search by. Can be ‘username’ or ‘email’.

• value (str) – The value to search for.

• headers (dict[str, str]) – XNAT authentication headers.

Returns:

The user profile.

Return type:

imaging_api.routers.schemas.User

Raises:

• AssertionError – If key is not "username" or "email".

• imaging_api.utils.exceptions.NotFoundError – If no XNAT user matches value for the given key.

• Exception – If fetching XNAT users fails.

imaging_api.services.users.user_exists(username: str, headers: dict[str, str]) → bool

Checks if a user exists in XNAT.

In XNAT, username is unique, so it can be used to identify the user: “ERROR: The username {username} is already in use. Please enter a different username value and try again.”

Parameters:

• username (str) – The username to check.

• headers (dict[str, str]) – XNAT authentication headers.

Returns:

True if the user exists, False otherwise.

Return type:

bool

imaging_api.services.users.create_user_from_central_hub_user(central_hub_user: imaging_api.routers.schemas.CentralHubUser, headers: dict[str, str]) → tuple[imaging_api.routers.schemas.CreatedUser, imaging_api.routers.schemas.User]

Convert central hub user to XNAT CreateUser request object, and create user on XNAT.

Parameters:

• central_hub_user (imaging_api.routers.schemas.CentralHubUser) – The user’s details on the Central Hub.

• headers (dict[str, str]) – XNAT authentication headers.

Returns:

The created user and the user profile.

Return type:

tuple[imaging_api.routers.schemas.CreatedUser, imaging_api.routers.schemas.User]

imaging_api.services.users.create_user(user: imaging_api.routers.schemas.CreateUser, headers: dict[str, str]) → imaging_api.routers.schemas.User

Core logic to create an XNAT user. Returns the newly created user profile.

Parameters:

• user (imaging_api.routers.schemas.CreateUser) – The user to create.

• headers (dict[str, str]) – XNAT authentication headers.

Returns:

The created user profile.

Return type:

imaging_api.routers.schemas.User

Raises:

• AlreadyExistsError – If a user with the same username already exists on XNAT (HTTP 409).

• Exception – If XNAT returns any other non-201 response.

imaging_api.services.users.add_user_to_project(user: imaging_api.routers.schemas.User, project_id: str, headers: dict[str, str]) → imaging_api.routers.schemas.User

Adds a user to a project in XNAT.

Parameters:

• user (imaging_api.routers.schemas.User) – The user to add.

• project_id (str) – The project ID.

• headers (dict[str, str]) – XNAT authentication headers.

Returns:

The user profile.

Return type:

imaging_api.routers.schemas.User

Raises:

• HTTPException – If there is an error during the addition of the user to the project.

• imaging_api.utils.exceptions.NotFoundError – If the user or project is not found.