From 53e26e39ffde2ad71e24949882c6eb75fbc74689 Mon Sep 17 00:00:00 2001
From: gumi <git@gumi.ca>
Date: Mon, 2 Apr 2018 14:21:46 -0400
Subject: add a TMWA endpoint to get misc server info

---
 .gitignore   |  1 +
 package.json |  6 ++++++
 server.js    | 36 +++++++++++++++++++++++++++++++++++-
 3 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 3c12ed1..7297aeb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /config.json
 /node_modules
 /package-lock.json
+/online.txt
diff --git a/package.json b/package.json
index a59d006..b8d511f 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
     "license": "CC0-1.0",
     "config": {
         "port": 8080,
+        "timezone": "UTC",
 
         "sql": {
             "host": "localhost",
@@ -17,6 +18,11 @@
 
         "recaptcha": {
             "secret": "recaptcha secret key"
+        },
+
+        "tmwa" : {
+            "name": "The Mana World Legacy Server",
+            "url": "tmwa://server.themanaworld.org:6901"
         }
     },
     "repository": {
diff --git a/server.js b/server.js
index 9798951..884ac6d 100644
--- a/server.js
+++ b/server.js
@@ -2,8 +2,31 @@ const express = require("express");
 const mysql = require("mysql");
 const bodyParser = require("body-parser");
 const https = require("https");
+const fs = require("fs");
 const api = express();
 
+const tmwa = {
+    status: "OfflineTemporarily",
+    num_online: 0,
+    interval: null,
+    poll: () => {
+        fs.readFile("./online.txt", "utf8", (err, data) => {
+            const lines = data.split("\n");
+            const last_online = Date.parse(lines[0].match(/\((.+)\)/)[1] + ` ${process.env.npm_package_config_timezone}`);
+
+            if (Date.now() - last_online < 30000) {
+                tmwa.status = "Online";
+                tmwa.num_online = lines[lines.length - 2].match(/([0-9]+) users are online./)[1];
+            } else {
+                tmwa.status = "OfflineTemporarily";
+                tmwa.num_online = 0;
+            }
+
+            setTimeout(tmwa.poll, 2000);
+        });
+    }
+};
+
 const checkCaptcha = (req, res, next) => {
     const token = String(req.get("X-CAPTCHA-TOKEN"));
 
@@ -43,7 +66,17 @@ const checkCaptcha = (req, res, next) => {
     })
 };
 
-
+api.get("/api/tmwa", (req, res) => {
+    res.append("Access-Control-Allow-Origin", "*"); // CORS ready
+    res.status(200).json({
+        "@context": "http://schema.org",
+        "@type": "GameServer",
+        name: process.env.npm_package_config_tmwa_name,
+        url: process.env.npm_package_config_tmwa_url,
+        playersOnline: tmwa.num_online,
+        serverStatus: tmwa.status,
+    });
+});
 
 api.use(checkCaptcha);
 api.use(bodyParser.json());
@@ -130,3 +163,4 @@ if (process.env.npm_package_config_port === undefined) {
 
 api.set("trust proxy", "loopback"); // only allow localhost to communicate with the API
 api.listen(process.env.npm_package_config_port, () => console.info(`Listening on port ${process.env.npm_package_config_port}`));
+tmwa.poll();
-- 
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