flexible update limit, set only in .env

.env.example

@@ -3,3 +3,4 @@ MYSQL_USER=
 MYSQL_PASSWORD=
 MYSQL_DATABASE=
 RIOT_API_KEY=
+UPDATE_LIMIT_MINUTES=

public/elotracker/chart-integration.js

@@ -353,22 +353,24 @@ async function update_leaderboard_entries() {
 		this.style.setProperty("--button-loading-bar-width", `${e.data * 100}%`);
 	})
 	eventSource.addEventListener("forbidden", e => {
+		eventSource.close();
+		let response = JSON.parse(e.data);
 		const currenttime = new Date();
-		const updatetime = new Date(e.data);
+		const updatetime = new Date(response.last);
 		let timediff = new Date(currenttime - updatetime);
-		let resttime = new Date(600000 - (currenttime - updatetime));
+		let resttime = new Date( 1000 * 60 * response.limit - (currenttime - updatetime));
 		window.alert(`Das letzte Update wurde vor ${format_time_minsec(timediff)} durchgeführt. Versuche es in ${format_time_minsec(resttime)} noch einmal`);
 		reset_button(this);
-		eventSource.close();
 	})
 	eventSource.onerror = e => {
+		eventSource.close();
 		window.alert(`Beim Update ist ein Fehler aufgetreten. Versuche es später noch einmal`)
 		reset_button(this);
-		eventSource.close();
 	}
 	eventSource.addEventListener("done", e => {
-		reset_button(this);
 		eventSource.close();
+		reset_button(this);
+
 		update_leaderboard_elements();
 	})
 

public/elotracker/update.php

@@ -1,5 +1,7 @@
 <?php
 
+require_once __DIR__."/../util/dotenv.php";
+
 header("X-Accel-Buffering: no");
 header('Content-Type: text/event-stream');
 header('Cache-Control: no-cache');
@@ -20,14 +22,20 @@ function sendEvent(string $event, string $data): void{
 require_once __DIR__."/../util/mysql_connect.php";
 $conn = new MySQLConnection();
 
+$update_limit = $_ENV["UPDATE_LIMIT_MINUTES"];
+
 $result = $conn->query("
 	SELECT date
 	FROM updates
-	WHERE date > SUBTIME(NOW(), '00:10:00')
+	WHERE date > SUBTIME(NOW(), '00:$update_limit:00')
 	LIMIT 1
 ");
 if ($result->num_rows > 0) {
-	sendEvent("forbidden", $result->fetch_assoc()["date"]);
+	$response = [
+		"limit" => $update_limit,
+		"last" => $result->fetch_assoc()["date"]
+	];
+	sendEvent("forbidden", json_encode($response));
 	die;
 }