twitch_check.php

<?php
# Quick and dirty script to check and notify me when a Twitch channel gets Affiliate status.
# https://github.com/KuJoe


$lockfile = '/DIR/TO/FILE.LOCK';

if (file_exists($lockfile)) {
	exit;
} else {
	$twitch = '<TWITCH_USERNAME>';

	function getTwitchAPI($url) {
			$ch = curl_init();

			curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
			curl_setopt($ch, CURLOPT_HEADER, 0);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
			curl_setopt($ch, CURLOPT_URL, $url);
			curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
			curl_setopt($ch, CURLOPT_HTTPHEADER, array(
					'Authorization: Bearer <OAUTH TOKEN>',
					'Client-ID: <TWITCH_DEV_CLIENT_ID>'
			));

			$data = curl_exec($ch);
			curl_close($ch);
			return $data;
	}

	function usersTwitch($twitch) {
			$url = 'https://api.twitch.tv/helix/users?login='.$twitch;
			$result = json_decode(getTwitchAPI($url), true);
			if(!$result['data'][0]) {
					return false;
			} else {
					if($result['data'][0]['broadcaster_type'] == 'affiliate') {
							$type = "Affiliate";
					} elseif($result['data'][0]['broadcaster_type'] == 'partner') {
							$type = "Partner";
					} else {
							$type = "Standard";
					}
					return $type;
			}
	}

	$type = usersTwitch($twitch);
	echo $type;
	if($type === 'Affiliate') {
		mail("<YOUR_EMAIL>","<SUBJECT>","<MSG>");
		fopen($lockfile, "w");
	} else {
		exit;
	}
}

?>