Example cdsdashboards Panel app including user detection

panel_user_app.py

import panel as pn
import param
import ast
import json

HSPACER = pn.Spacer(height=4, background="#261342")
pn.extension("tabulator")

class EmployeeOverviewAdminRoot(param.Parameterized):
    """Employee Overview App for Administrators"""

    employee_id = 0

    employees = ["dan", "bob"]

    user = param.String()

    employee_list = param.ObjectSelector()
    
    def __init__(self, user, **params):
        super().__init__(user=user, **params)
        
        self.param.employee_list.objects = list(
            self.employees
        )
        self.param.user = user

        try:
            self.employee_id = self.employees.index(user)+1
            self.employee_list = user
        except ValueError:
            pass
        
    def layout(self):
        """Layout of the entire app"""
        return pn.Column(
            self.param.employee_list,
            self.get_employee_view(),
            sizing_mode="stretch_width",
        )
    
    @param.depends("employee_list")
    def get_employee_view(self):
        if self.employee_id > 0:
            employee_status = f"You are employee number {self.employee_id}"
        else:
            employee_status = "You are not a known employee"
        
        return pn.Column(
            f"## Selected Employee: {self.employee_list}",
            HSPACER,
            pn.pane.Str(employee_status),
            f"## You Are: {self.user}",
            HSPACER,
            sizing_mode="stretch_width",
        )      

    def panel(self):
        return pn.panel(self.layout, loading_indicator=True)

def employee_overview_admin(doc):
    pn.extension(loading_spinner="dots", loading_color="#00aa41")

    user = 'unknown'
    
    header_name = "X-Cdsdashboards-Jh-User"
    if header_name in doc.session_context.request.headers:
        user = json.loads(doc.session_context.request.headers[header_name]).get('name', user)

    app = EmployeeOverviewAdminRoot(user)

    layout = app.panel()
    if layout is None:
        layout = pn.Column("App did not load")
    # add the layout to the doc
    doc.add_root(layout.get_root())
    
employee_overview_admin(pn.state.curdoc)