Error Fetching Menu - Invalid JSON Response

[wiesty]

Description:

When using the MMM-Mensamuc module, an error occurs when attempting to fetch the menu data from the API. The error appears to be triggered when the API responds with an HTML document (e.g., a 404 page) instead of the expected JSON format. This results in the following error being logged:

MMM-Mensamuc.js:38 Error fetching menu: SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON MMM-Mensamuc.js:29 GET https://tum-dev.github.io/eat-api/mensa-lothstr/2024/34.json 404 (Not Found)

Steps to Reproduce:

1. Set up the MMM-Mensamuc module.
2. Configure the module to use a canteen for which there is no data available (e.g., by setting the canteen property to mensa-lothstr during a week where the data file is not available).
3. Observe the error in the developer console.

Expected Behavior:

If the API response is not valid JSON or if a 404 error occurs, the module should handle the error gracefully by displaying a message such as "No menu available yet" instead of logging a syntax error.

Actual Behavior:

The module attempts to parse the HTML error page as JSON, leading to a syntax error being logged in the console.

[wiesty]

Fixed with Commit afbcc2e22eecce6e4e028e3ded594b48b07d49e0