Turn of lights when the display sleeps

SwitchLights.swift

import Foundation
import CoreGraphics

// Define the URL for the HTTP GET request
let baseURL = "http://tasmota-f72dd5-3541.fritz.box/cm?cmnd=Power%20"

// Create a URLSession
let session = URLSession.shared

// Define a function to create a task with a URL
func createTask(with suffix: String) -> URLSessionDataTask {
    let url = URL(string: baseURL + suffix)!
    return session.dataTask(with: url) { (data, response, error) in
        if error != nil || data == nil {
            print("Client error!")
            return
        }

        guard let response = response as? HTTPURLResponse, (200...299).contains(response.statusCode) else {
            print("Server error!")
            return
        }

        guard let mime = response.mimeType, mime == "application/json" else {
            print("Wrong MIME type!")
            return
        }
    }
}

// Start an infinite loop
while true {
    let mainDisplayID = CGMainDisplayID();
    let isAsleep = CGDisplayIsAsleep(mainDisplayID);

    if (isAsleep != 0) {
        // The display is asleep, issue the HTTP GET request
        // print("Display is asleep, turning off lights...")
       
        // Create and start the task
        createTask(with: "Off").resume()
    } else {
        // The display is not asleep, issue the HTTP GET request
        // print("Display is awake, turning on lights...")
       
        // Create and start the task
        createTask(with: "On").resume()
    }

    // Sleep for a second before checking again
    sleep(5)
}

/*
Inspired by and pieced together with:

https://arstechnica.com/civis/threads/tasmota-smart-plugs-are-nice.1490152/

https://www.bernhard-baehr.de

https://github.com/luckman212/dstat/blob/main/main.m
https://stackoverflow.com/questions/69066960/in-macos-is-there-a-way-to-be-notified-when-the-display-not-the-whole-system
https://developer.apple.com/documentation/appkit/nsworkspace/1530288-screensdidsleepnotification

https://github.com/psieg/Lightpack/issues/98
https://stackoverflow.com/questions/4929731/check-if-display-is-at-sleep-or-receive-sleep-notifications
https://stackoverflow.com/questions/32913789/cannot-receive-nsworkspacedidwakenotification-in-swift-os-x
https://github.com/home-assistant/iOS/issues/1317
*/

• sleepwatch's display events don't work on m1/silicon macs
• https://developer.apple.com/documentation/appkit/nsworkspace/1530288-screensdidsleepnotification didn't work for me on Ventura either