Dash utilities

dash_utils

This module containes convient methods to typical dash related methods:

Timezone related

To make the client timezone available in callbacks, invoke the following during you setup

init_client_tz_javascript(dashappp)

This adds a small snippet of javascript, which sets a cookie with the timezone. After this, a couple of functions has been implemented to conveniently deal with datetime objects such as

get_client_tz()
to_client_tz(dt)
format_client_date()
parse_client_date()

Notice the two last functions uses dash_utils.CLIENT_DATE_FORMAT which defaults to %Y-%m-%d %H:%M:%S.

Dash callback related

Two functions to deal with the trigger source of a callback has also been implemented

was_source(id_str)
get_source()

keycloak_utils

This module implements some convenient functions when integrating with dash-keycloak and dealing with roles.

Firstly, one should set the client in keycloak_utils.KEYCLOAK_CLIENT.

It is now possible to check if a user has a given role or even decorate a flask route to abort with 401 if the user does not have a role from a given list.

check_role("admin")

@require_role(["READ", "WRITE"])
@app.route('/api/status', methods=["GET"])
def do_stuff():
    ...

Read and write

A small scheme to determine read and write access has also been implemented. In this scheme a user can have either READ or WRITE access to a subject.

The role names is thus defined as <subject>/READ, <subject>/WRITE or <subject>/ALL. The admin role has special privileges, i.e. both READ and WRITE for all subjects.

A users access for a subject can now be checked with

has_read_access(subject)
has_read_write(subject)