Add time synchronization. Closes GH-93

Merge pull request #93 from satoshinm/time

README.md

@@ -83,6 +83,7 @@ Configures the NetCraft web client:
 * `allow_chatting` (true): allow web users to send chat messages to the server
 * `see_chat` (true): allow web users to receive chat messages from the server
 * `see_players` (true): allow web users to see other player positions
+* `see_time` (true): sync server time to web client time if true, if false then fixed at noon
 * `creative_mode` (true): if true, the web client is set to creative mode by default, else survival mode (warning: survival mode is incomplete and experiemntal)
 * `blocks_to_web_override`: map of Bukkit material names to NetCraft web client IDs -- you can add additional block types here if they don't show up correctly
  * This overrides the built-in map, and by default is empty (`blocks_to_web` pre-1.4.2 is no longer used).

src/main/java/io/github/satoshinm/WebSandboxMC/Settings.java

@@ -47,6 +47,7 @@ abstract public class Settings {
     public boolean allowChatting = true;
     public boolean seeChat = true;
     public boolean seePlayers = true;
+    public boolean seeTime = true;
     public boolean creativeMode = true;
 
     public Map<String, Object> blocksToWebOverride = new HashMap<String, Object>();

src/main/java/io/github/satoshinm/WebSandboxMC/bridge/BlockBridge.java

@@ -30,6 +30,7 @@ public class BlockBridge {
     public Location spawnLocation;
     private boolean allowBreakPlaceBlocks;
     private boolean allowSigns;
+    private boolean seeTime;
     private Map<Material, Integer> blocksToWeb;
     private int blocksToWebMissing; // unknown/unsupported becomes cloud, if key missing
     private boolean warnMissing;
@@ -69,6 +70,7 @@ public BlockBridge(WebSocketServerThread webSocketServerThread, Settings setting
 
         this.allowBreakPlaceBlocks = settings.allowBreakPlaceBlocks;
         this.allowSigns = settings.allowSigns;
+        this.seeTime = settings.seeTime;
 
         this.blocksToWeb = new HashMap<Material, Integer>();
         this.blocksToWebMissing = 16; // unknown/unsupported becomes cloud
@@ -133,6 +135,18 @@ public void sendWorld(final Channel channel) {
             webSocketServerThread.sendLine(channel, "m,0");
         }
 
+        int day_length = 60 * 20; // 20 minutes
+
+        if (seeTime) {
+            double fraction = world.getTime() / 1000.0 / 24.0; // 0-1
+            double elapsed = (fraction + 6.0 / 24) * day_length;
+            System.out.println("day_length = "+day_length+", elapsed="+elapsed);
+            webSocketServerThread.sendLine(channel, "E," + elapsed + "," + day_length);
+            // TODO: listen for server time change and resend E, command
+        } else {
+            webSocketServerThread.sendLine(channel, "E,0,0");
+        }
+
         // Send a multi-block update message announcement that a binary chunk is coming
         /*
         int startx = -radius;

src/main/java/io/github/satoshinm/WebSandboxMC/bukkit/SettingsBukkit.java

@@ -52,6 +52,7 @@ public SettingsBukkit(Plugin plugin) {
         config.addDefault("nc.allow_chatting", this.allowChatting);
         config.addDefault("nc.see_chat", this.seeChat);
         config.addDefault("nc.see_players", this.seePlayers);
+        config.addDefault("nc.see_time", this.seeTime);
         config.addDefault("nc.creative_mode", this.creativeMode);
 
         config.addDefault("nc.blocks_to_web_override", this.blocksToWebOverride);
@@ -92,6 +93,7 @@ public SettingsBukkit(Plugin plugin) {
         this.allowChatting = plugin.getConfig().getBoolean("nc.allow_chatting");
         this.seeChat = plugin.getConfig().getBoolean("nc.see_chat");
         this.seePlayers = plugin.getConfig().getBoolean("nc.see_players");
+        this.seeTime = plugin.getConfig().getBoolean("nc.see_time");
         this.creativeMode = plugin.getConfig().getBoolean("nc.creative_mode");
         if (plugin.getConfig().getConfigurationSection("nc.blocks_to_web") != null) {
             this.log(Level.WARNING, "blocks_to_web is now ignored, you can remove it or add to blocks_to_web_override instead");