From 6f75fcba4301ad56ffdbd5dfc40c3f1b1e3e7d0a Mon Sep 17 00:00:00 2001
From: Gregg Tavares <github@greggman.com>
Date: Mon, 24 Nov 2014 22:53:14 -0800
Subject: [PATCH] make it try to change ipaddresses when NIC changes

---
 lib/iputils.js       | 63 ++++++++++++++++++++++++++++++++++++--------
 server/hft-server.js |  8 +++++-
 server/hftsite.js    | 48 +++++++++++++++++++++++----------
 todo.md              | 10 +++++++
 4 files changed, 103 insertions(+), 26 deletions(-)

diff --git a/lib/iputils.js b/lib/iputils.js
index 48a496f2..25f33a6d 100644
--- a/lib/iputils.js
+++ b/lib/iputils.js
@@ -30,6 +30,10 @@
  */
 "use strict";
 
+var events = require('events');
+
+var g_emitter = new events.EventEmitter();
+
 /**
  * @module
  */
@@ -47,7 +51,6 @@ var getIpAddress = (function() {
   var os = require('os');
 
   return function() {
-
     var now = Date.now();
     if (!addresses || now - lastRead > cacheTime) {
       lastRead = now;
@@ -66,21 +69,59 @@ var getIpAddress = (function() {
   };
 }());
 
-var getOneIpAddress = function() {
-  var address;
-  var addresses = getIpAddress();
+var arraysEqual = function(a, b) {
+  if ((!a && b) || (!b && a)) {
+    return false;
+  }
+
+  if (a.length != b.length) {
+    return false;
+  }
 
-  if (addresses.length < 1) {
-    console.error("No IP address found!!!");
-  } else {
-    address = addresses[0];
-    if (addresses.length > 1) {
-      console.log("more than 1 IP address found: " + addresses);
+  var len = a.length;
+  for (var ii = 0; ii < len; ++ii) {
+    if (a[ii] !== b[ii]) {
+      return false;
     }
   }
-  return address;
+  return true;
 };
 
+var getOneIpAddress = (function() {
+  var lastAddress;
+  var oldAddresses;
+
+  return function() {
+    var address;
+    var addresses = getIpAddress();
+
+    if (addresses.length < 1) {
+      console.error("No IP address found!!!");
+    } else {
+      address = addresses[0];
+      if (addresses.length > 1) {
+        var newAddresses = addresses.slice().sort();
+        if (!arraysEqual(newAddresses, oldAddresses)) {
+          console.log("more than 1 IP address found: " + addresses);
+          oldAddresses = newAddresses;
+        }
+      }
+    }
+
+    if (address !== lastAddress) {
+      lastAddress = address;
+      g_emitter.emit('changed', lastAddress);
+    }
+
+    return address;
+  };
+}());
+
 exports.getIpAddress = getIpAddress;
 exports.getOneIpAddress = getOneIpAddress;
+exports.on = g_emitter.on.bind(g_emitter);
+exports.addListener = exports.on;
+exports.removeListener = g_emitter.removeListener.bind(g_emitter);
+
+
 
diff --git a/server/hft-server.js b/server/hft-server.js
index d72c4d16..ec1445cd 100644
--- a/server/hft-server.js
+++ b/server/hft-server.js
@@ -105,6 +105,7 @@ var HFTServer = function(options, startedCallback) {
       relayServer.setOptions({baseUrl: getBaseUrl()});
     }
     hftSite.setup({address: address});
+    hftSite.inform();
     if (appleCaptivePortalHandler) {
       appleCaptivePortalHandler.setOptions({address: address});
     }
@@ -124,6 +125,8 @@ var HFTServer = function(options, startedCallback) {
     };
   }());
 
+  var ipIntervalId = setInterval(getAddress, 15 * 1000);
+
   var getBaseUrl = function() {
     return "http://" + getAddress() + ":" + g.port;
   };
@@ -612,7 +615,10 @@ var HFTServer = function(options, startedCallback) {
     servers.forEach(function(server) {
       server.close();
     });
-
+    if (ipIntervalId) {
+      clearInterval(ipIntervalId);
+      ipIntervalId = undefined;
+    }
   }.bind(this);
 
   this.getSettings = function() {
diff --git a/server/hftsite.js b/server/hftsite.js
index 4ed2ea02..0bde5b24 100644
--- a/server/hftsite.js
+++ b/server/hftsite.js
@@ -37,24 +37,44 @@ var io      = require('../lib/io');
 var restUrl = require('rest-url');
 
 var g = {
+  throttleTime: 1000
+};
+
+var getTime = function() {
+  return Date.now();
 };
 
 // Sends the local ip address and port
-var inform = function() {
-  if (!g.privateServer) {
-    var url = restUrl.make(process.env.HFT_RENDEZVOUS_URL || config.getSettings().settings.rendezvousUrl, {
-      hftip: g.address,
-      hftport: g.port,
-    })
-    debug("ping: " + url);
-    io.sendJSON(url, {}, {}, function(err, result) {
-      // do I care?
-      if (err) {
-        console.error(err);
+var inform = (function() {
+  var lastAddress;
+  var lastPort;
+  var lastTime = 0;
+
+  return function() {
+    if (!g.privateServer && g.port && g.address) {
+      var now = getTime();
+      var elapsedTime = now - lastTime;
+      if (lastAddress != g.address ||
+          lastPort != g.port ||
+          elapsedTime > g.throttleTime) {
+        lastTime = now;
+        lastAddress = g.address;
+        lastPort = g.port;
+        var url = restUrl.make(process.env.HFT_RENDEZVOUS_URL || config.getSettings().settings.rendezvousUrl, {
+          hftip: g.address,
+          hftport: g.port,
+        })
+        debug("ping: " + url);
+        io.sendJSON(url, {}, {}, function(err, result) {
+          // do I care?
+          if (err) {
+            console.error(err);
+          }
+        });
       }
-    });
-  }
-};
+    }
+  };
+}());
 
 /**
  * @typedef {Object} HFTSite~Options
diff --git a/todo.md b/todo.md
index 92218929..901f4181 100644
--- a/todo.md
+++ b/todo.md
@@ -1,6 +1,16 @@
 To Do
 =====
 
+*   unity plugin
+    *   make package.json editor
+    *   make "new project" button?
+    *   make "start HFT?" button (or should running it be enough)
+    *   make "location of HFT" button?
+    *   make stages of commands
+        *   cmd with cmd string RegisterCmdHandler<type>(fn)
+        *   RegisterCmdHandler<type>(name, fn)
+        *   RegisterCmdHandler(fn);
+        *   Use RegisterCmdHandler(fn) for gamestart
 *   move tiled support to hft-tiled?
 *   add tiled support to jumpjump
 *   add glow processing to powpow?