From 6271f29996cf3a1862bcde0fe8bd1eb52b2c0574 Mon Sep 17 00:00:00 2001
From: Chris Marsh <chris@discordapp.com>
Date: Tue, 27 Jun 2017 12:23:09 -0700
Subject: [PATCH] adding a js test server

---
 test-rpc-server/package.json   |  9 +++++++
 test-rpc-server/rpc-message.js | 24 +++++++++++++++++
 test-rpc-server/rpc-server.js  | 45 +++++++++++++++++++++++++++++++
 test-rpc-server/test-client.js | 48 ++++++++++++++++++++++++++++++++++
 4 files changed, 126 insertions(+)
 create mode 100644 test-rpc-server/package.json
 create mode 100644 test-rpc-server/rpc-message.js
 create mode 100644 test-rpc-server/rpc-server.js
 create mode 100644 test-rpc-server/test-client.js

diff --git a/test-rpc-server/package.json b/test-rpc-server/package.json
new file mode 100644
index 0000000..1b62723
--- /dev/null
+++ b/test-rpc-server/package.json
@@ -0,0 +1,9 @@
+{
+  "name": "test-rpc-server",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "server": "node rpc-server.js",
+    "client": "node test-client.js"
+  }
+}
\ No newline at end of file
diff --git a/test-rpc-server/rpc-message.js b/test-rpc-server/rpc-message.js
new file mode 100644
index 0000000..0508b83
--- /dev/null
+++ b/test-rpc-server/rpc-message.js
@@ -0,0 +1,24 @@
+
+module.exports = class RpcMessage {
+    static serialize(obj) {
+        const serializedJson = JSON.stringify(obj);
+        const msgLen = 4 + serializedJson.length;
+        let buff = Buffer.alloc(msgLen);
+        buff.writeInt32LE(msgLen, 0);
+        buff.write(serializedJson, 4, serializedJson.length, 'utf-8');
+        return buff;
+    }
+
+    static deserialize(buff) {
+        const msgLen = buff.readInt32LE(0);
+        if (buff.length < msgLen) {
+            return null;
+        }
+        const msg = buff.toString('utf-8', 4, msgLen);
+        try {
+            return JSON.parse(msg);
+        } catch(e) {
+            return null;
+        }
+    }
+};
diff --git a/test-rpc-server/rpc-server.js b/test-rpc-server/rpc-server.js
new file mode 100644
index 0000000..67933e7
--- /dev/null
+++ b/test-rpc-server/rpc-server.js
@@ -0,0 +1,45 @@
+const net = require('net');
+const RpcMessage = require('./rpc-message');
+
+console.log('Start up');
+
+let PipePrefix;
+if (process.platform == 'win32') {
+    PipePrefix = "\\\\.\\pipe\\";
+}
+else {
+    PipePrefix = "/tmp";
+}
+
+const PipePath = PipePrefix + "DiscordRpcServer";
+
+var server = net.createServer(function(stream) {
+    console.log('Server: on connection')
+
+    stream.on('data', function(data) {
+        const msgObj = RpcMessage.deserialize(data);
+        if (msgObj != null) {
+            console.log('Server: on data:', msgObj);
+        }
+        else {
+            console.log('Server: got some data');
+        }
+    });
+
+    stream.on('end', function() {
+        console.log('Server: on end')
+        server.close();
+    });
+});
+
+server.on('close', function(){
+    console.log('Server: on close');
+})
+
+try {
+    server.listen(PipePath, function(){
+        console.log('Server: on listening');
+    });
+} catch(e) {
+    console.error('could not start server:', e);
+}
\ No newline at end of file
diff --git a/test-rpc-server/test-client.js b/test-rpc-server/test-client.js
new file mode 100644
index 0000000..44f00bc
--- /dev/null
+++ b/test-rpc-server/test-client.js
@@ -0,0 +1,48 @@
+const net = require('net');
+const RpcMessage = require('./rpc-message');
+
+var PIPE_NAME = "DiscordRpcServer";
+var PIPE_PATH = "\\\\.\\pipe\\" + PIPE_NAME;
+
+const msg = new RpcMessage();
+
+function sendMesg(testUpdatesToSend, stream) {
+    const msgObj = {
+        name: 'My Awesome Game',
+        state: (testUpdatesToSend % 2 == 0) ? 'In a match' : 'In Lobby'
+    };
+    console.log('Client: send update:', msgObj);
+    stream.write(RpcMessage.serialize(msgObj));
+}
+
+function sendMessageLoop(testUpdatesToSend, interval, stream) {
+    sendMesg(testUpdatesToSend, stream);
+    if (testUpdatesToSend > 1) {
+        setTimeout(() => {sendMessageLoop(testUpdatesToSend - 1, interval, stream)}, interval);
+    } else {
+        shutdown();
+    }
+}
+
+const client = net.connect(PIPE_PATH, function(stream) {
+    console.log('Client: on connection');
+
+    sendMessageLoop(5, 3000, client);
+});
+
+client.on('data', function(data) {
+    const msgObj = RpcMessage.deserialize(data);
+    if (msgObj != null) {
+        console.log('Client: got data:', msgObj);
+    } else {
+        console.log('Client: got some data');
+    }
+});
+
+client.on('end', function() {
+    console.log('Client: on end');
+});
+
+function shutdown() {
+    client.end();
+}
\ No newline at end of file