Robust Error Handling with Effects in Angular

Effect-based state management, often using libraries like NgRx or Akita, provides a powerful way to handle asynchronous operations and side effects in Angular applications. This challenge focuses on implementing robust error handling within Angular effects, ensuring your application gracefully handles failures and provides informative feedback to the user. You'll be building an effect that fetches data and demonstrates how to catch and handle errors effectively.

Problem Description

You are tasked with creating an Angular effect that fetches user data from a mock API endpoint. The effect should:

Fetch User Data: Use the HttpClient to fetch user data from the endpoint https://jsonplaceholder.typicode.com/users/1.
Handle Success: On successful retrieval, dispatch a custom action LoadUserSuccess with the fetched user data.
Handle Errors: If the HTTP request fails (e.g., network error, server error, invalid response), dispatch a custom action LoadUserError with an error message. The error message should be a string describing the failure.
Logging: Log the error to the console for debugging purposes.
Graceful Degradation: Ensure the application doesn't crash or display confusing errors to the user in case of failure.

Key Requirements:

Utilize the RxJS from operator to convert the HttpClient observable to an effect.
Implement error handling using the catchError operator within the effect.
Dispatch custom actions to communicate success and failure states to the rest of the application.
The effect should be triggered by a custom action LoadUser.
The effect should not emit anything on success, only dispatch actions.

Expected Behavior:

When the LoadUser action is dispatched, the effect should initiate the HTTP request.
On successful data retrieval, the LoadUserSuccess action should be dispatched.
On error, the LoadUserError action should be dispatched, and the error should be logged to the console.
The application should remain stable and responsive regardless of the HTTP request's outcome.

Edge Cases to Consider:

Network connectivity issues.
Server returning a non-200 status code.
Invalid JSON response from the server.

Examples

Example 1:

Input: Dispatch LoadUser action
Output: Dispatch LoadUserSuccess action with user data (if successful)
Explanation: The effect successfully fetches user data and dispatches the success action.

Example 2:

Input: Dispatch LoadUser action, network error occurs
Output: Dispatch LoadUserError action with "Network error occurred" message, error logged to console.
Explanation: The effect catches the network error and dispatches the error action.

Example 3:

Input: Dispatch LoadUser action, server returns 500 status code
Output: Dispatch LoadUserError action with "Server error occurred" message, error logged to console.
Explanation: The effect catches the server error and dispatches the error action.

Constraints

You must use Angular version 14 or higher.
You must use RxJS version 7 or higher.
The error message should be a string.
The effect should be implemented using the createEffect function from @ngrx/effects (or equivalent from your chosen effect library).
Assume the existence of LoadUser, LoadUserSuccess, and LoadUserError actions. You do not need to define these actions themselves, only handle them within the effect.
Performance is not a primary concern for this challenge; focus on correctness and clarity.

Notes

Consider using a generic error handler within the catchError operator to handle different types of errors consistently.
Think about how the rest of your application will react to the LoadUserSuccess and LoadUserError actions. This challenge focuses on the effect itself, but the actions it dispatches are crucial for the overall application state management.
You can use a mock HttpClient for testing purposes if you prefer.
Remember to import necessary modules and dependencies.