Simplify Core Event to make it accessible

[FlorianJacta]

Description

The code to configure Core Event is challenging for new comers. We should find a way to make it simple:

from taipy.core import Status
from taipy.core.notification import (
    CoreEventConsumerBase,
    EventEntityType,
    EventOperation,
    Notifier,
)
from taipy.auth import Authorize, login
import taipy as tp
from taipy.gui import notify, invoke_callback, Gui
import time
import datetime as dt


def notify_user(state, data_node_id, scenario_id):
    if state.credentials is not None:
        try:
            with Authorize(state.credentials):
                data_node = tp.get(data_node_id)
                print(
                    f"Updating data node {data_node.config_id} in scenario {scenario_id}"
                )

                if state.scenario.id == scenario_id:
                    if data_node.config_id == "mask_layer_trend_combined":
                        state.mask_layer_trend_combined = data_node.read()
                    elif data_node.config_id == "filtered_stock_and_mask_layer_trend":
                        state.filtered_stock_and_mask_layer_trend = data_node.read()

        except Exception as e:
            print(e)


class SpecificCoreConsumer(CoreEventConsumerBase):
    def __init__(self, gui: Gui):
        self.gui = gui

        reg_id, queue = Notifier.register(
            EventEntityType.JOB, operation=EventOperation.UPDATE
        )  # Adapt the registration to the events you want to listen to
        super().__init__(reg_id, queue)

    def process_event(self, event):
        with Authorize(login(ADMIN, ADMIN)):
            if (
                event.entity_type == EventEntityType.JOB
                and event.operation == EventOperation.UPDATE
            ):
                if (
                    event.attribute_name == "status"
                    and event.attribute_value == Status.COMPLETED
                ):
                    task = tp.get(event.entity_id).task
                    outputs = task.output
                    for data_node in outputs.values():
                        try:
                            scenario_id = data_node.owner_id
                            if scenario_id is not None:
                                self.gui.broadcast_callback(
                                    notify_user,
                                    [data_node.id, scenario_id],
                                )
                        except Exception as e:
                            print(e)

I was also not able to code a similar Core Event that is called when a data node is updated.

Acceptance Criteria

• Any new code is covered by a unit tested.
• Check code coverage is at least 90%.

Code of Conduct

• I have checked the existing issues.
• I am willing to work on this issue (optional)