Add files

README.md

@@ -1,2 +1,5 @@
-# mc-server-watcher
+A script that sends a Discord webhook whenever a server goes offline/online and when a player joins/leaves (works for up to ~5 players)
+
+Requires [MCStatus](https://github.com/reimarpb/mcstatus) to be installed
+
 

watch-server.js

@@ -0,0 +1,116 @@
+const { exec } = require("child_process");
+const https = require("https");
+
+const SERVER = process.argv[2];
+const WEBHOOK_URL = process.env.WEBHOOK_URL;
+
+let oldServerStatus = {
+	online: false,
+	players: -1,
+	samplePlayers: [],
+};
+
+getServerStatus(SERVER);
+setInterval(() => getServerStatus(SERVER), 10000);
+
+function getServerStatus(server) {
+	console.log(`Getting server status of ${server}`);
+
+	return new Promise((resolve, reject) => {
+		exec("mcstatus -j " + server, async (error, stdout, stderr) => {
+			if  (error) {
+				console.log(stderr);
+				if (oldServerStatus.online) {
+					sendMessage(":red_circle: The server is now offline");
+					oldServerStatus = {
+						online: false,
+						players: -1,
+						samplePlayers: [],
+					};
+				}
+				return resolve();
+			}
+
+			console.log(stdout);
+
+			const json = JSON.parse(stdout);
+
+			if (json.version.name.match(/Offline/)) {
+				if (oldServerStatus.online) {
+					sendMessage(":red_circle: The server is now offline");
+					oldServerStatus = {
+						online: false,
+						players: -1,
+						samplePlayers: [],
+					};
+				}
+				return resolve();
+			}
+
+			const match = json.description.text.match(new RegExp(`Connect to §a(${SERVER}:\\d+)§7§8`));
+			if (match) {
+				resolve(await getServerStatus(match[1]));
+				return resolve();
+			}
+
+			if (!oldServerStatus.online) {
+				await sendMessage(":green_circle: The server is now online");
+			}
+
+			const samplePlayers = json.players.sample || [];
+			samplePlayers.forEach(player => {
+				if (!oldServerStatus.samplePlayers.map(p => p.id).includes(player.id)) {
+					sendMessage(`**${player.name}** joined the server`);
+				}
+			});
+
+			oldServerStatus.samplePlayers.forEach(player => {
+				if (!samplePlayers.map(p => p.id).includes(player.id)) {
+					sendMessage(`**${player.name}** left the server`);
+				}
+			});
+
+			/*if (oldServerStatus.players != json.players.online) {
+				sendMessage(`There are now **${json.players.online}** players online`);
+			}*/
+
+			oldServerStatus = {
+				online: true,
+				players: json.players.online,
+				samplePlayers,
+			};
+		});
+	});
+}
+
+function sendMessage(text) {
+	console.log(text);
+
+	return new Promise((resolve, reject) => {
+		const data = JSON.stringify({
+			content: text,
+		});
+
+		const options = {
+			method: "POST",
+			headers: {
+				"Accept": "application/json",
+				"Content-Type": "application/json",
+				"Content-Length": data.length,
+			}
+		};
+		const req = https.request(WEBHOOK_URL, options, (res) => {
+
+			let data = "";
+			res.on("data", chunk => data += chunk);
+			res.on("end", () => {
+				console.log(res.statusCode);
+				resolve();
+			});
+
+		});
+		req.write(data);
+		req.end();
+	});
+}
+