useApp

This document provides an overview and elanation of the useApp.ts file. This file defines a custom hook useApp which is used to manage application events and state transitions in a React application using the useAppStore hook.

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Overview

The useApp hook listens for application-wide events and updates the state or displays notifications based on these events. It utilizes React's useEffect to initialize event listeners and perform clean-up when necessary.

Imports

import { useEffect } from "react";
import { useAppStore } from "../hooks/useAppStore";
import { AppMode } from "@shared/enums";

• useEffect: A React hook that lets you perform side effects in function components.
• useAppStore: A custom hook presumably for accessing and modifying the global application state.
• AppMode: An enumeration representing different modes the application might operate in.

Custom Hook: useApp

eort const useApp = () => {
  const setAppMode = useAppStore((state) => state.setAppMode);
  const setOpenAboutKweenBModal = useAppStore(
    (state) => state.setOpenAboutKweenBModal
  );
  const showToast = useAppStore((state) => state.showToast);
  const setLoading = useAppStore((state) => state.setLoading);

  useEffect(() => {
    // Code handling various application events
  }, []);
};

eort default useApp;

Variables

• setAppMode: A function to set the application's current mode.
• setOpenAboutKweenBModal: A function to control the visibility of the "About KweenB" modal.
• showToast: A function to display notification toasts.
• setLoading: A function to set the loading state and message.

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Event Handlers

The useEffect hook sets up event listeners for application events:

Event Listener Table

Event	Description	Handler
onAboutKweenB	Opens the "About KweenB" modal.	setOpenAboutKweenBModal(true)
onError	Displays an error toast with the error message.	showToast({ message, severity: "error" })
onInfo	Displays an info toast with the message.	showToast({ message, severity: "info" })
onSuccess	Displays a success toast with the message.	showToast({ message, severity: "success" })
onClosing	Sets the loading state with a closing message.	setLoading({ loading: true, text: "Closing application..." })
onLoading	Sets the loading state with the provided loading status and text.	setLoading({ loading, text, cancelButton: false })
onAppMode	Updates the application's mode.	setAppMode(_appMode as AppMode)

Implementation Details

• onAboutKweenB: Invokes when the "About KweenB" event is triggered, opening the corresponding modal.

• onError: Captures error events and displays a toast notification with an error severity level.

• onInfo & onSuccess: These events show toast notifications with informational and success messages respectively.

• onClosing: When triggered, sets the application state to loading and displays a closing message.

• onLoading: Manages loading events, adjusting the loading state and optionally displaying a message.

• onAppMode: Changes the current mode of the application.

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Conclusion

The useApp hook acts as a central point for handling various application events, updating the state, and notifying users via toast messages. This promotes a reactive and dynamic user interface within the application by efficiently managing state and events.