add HFTSystem, a class to talk to the hft at a system level

public/hft/0.x.x/scripts/hft-system.js

@@ -0,0 +1,101 @@
+/*
+ * Copyright 2014, Gregg Tavares.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Gregg Tavares. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF2 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+"use strict";
+
+define([
+    './eventemitter',
+    './gameclient',
+    './misc/gameclock',
+  ], function(
+    EventEmitter,
+    GameClient,
+    GameClock
+  ) {
+
+  /**
+   * Handles talking to the HFT System for system level stuff.
+   */
+  var HFTSystem = function() {
+    var g = {
+      clock: new GameClock(),
+      eventEmitter: new EventEmitter(),
+      connected: false,
+    };
+
+    var noop = function() {
+    };
+
+    var handleConnect = function() {
+      g.connected = true;
+      g.eventEmitter.emit('connect');
+    };
+
+    var handleDisconnect = function() {
+      if (g.connected) {
+        g.connected = false;
+        g.eventEmitter.emit('disconnect');
+      }
+      g.client = undefined;
+      // Don't try more than once a second.
+      var elapsedTime = Math.floor(g.clock.getElapsedTime() * 1000);
+      var timeout = Math.max(1000 - elapsedTime, 0);
+      setTimeout(tryToConnect, timeout);
+    };
+
+    var handleRunningGames = function(data) {
+      g.eventEmitter.emit('runningGames', data);
+    };
+
+    var tryToConnect = function() {
+      // just read time so the next time we read it we'll get the time since this read.
+      g.clock.getElapsedTime();
+
+      g.client = new GameClient({gameId: "__hft__"});
+      g.client.addEventListener('connect', handleConnect);
+      g.client.addEventListener('disconnect', handleDisconnect);
+      g.client.addEventListener('hftInfo', noop);
+      g.client.addEventListener('gameExited', noop);
+      g.client.addEventListener('runningGames', handleRunningGames);
+      g.client.sendCmd('getRunningGames');
+    };
+
+    setTimeout(tryToConnect, 0);
+
+    this.on = g.eventEmitter.on.bind(g.eventEmitter);
+    this.addEventListener = this.on;
+    this.removeEventListener = g.eventEmitter.removeEventListener.bind(g.eventEmitter);
+  };
+
+  return HFTSystem;
+});
+
+