Modifications to support plugging and unplugging plus new test

Author: codepope

BigRedButton.js

@@ -13,10 +13,8 @@ var LID_DOWN=0x15, LID_UP=0x17, BUTTON_DOWN=0x16;
 
 function getAllDevices()
 {
-   if (!allDevices) {
-      allDevices = HID.devices(7476,13);
-   }
-   return allDevices;
+     allDevices = HID.devices(7476,13);
+     return allDevices;
 }
 
 function BigRedButton(index)
@@ -29,6 +27,7 @@ function BigRedButton(index)
    if (!bigRedButton.length) {
       throw new Error("No BigRedButton could be found");
    }
+
    if (index > bigRedButton.length || index < 0) {
       throw new Error("Index " + index + " out of range, only " + bigRedButton.length + " BigRedButton found");
    }
@@ -49,6 +48,7 @@ function BigRedButton(index)
       setTimeout(function() {
          this.hid.close();
       }.bind(this), 100);
+      this.emit("buttonGone");
    };
 }
 

BigRedButtonTest.js

@@ -2,27 +2,42 @@
 
 var BigRedButton = require('./BigRedButton');
 
-var bigRedButton;
-
-for (var i = 0; i < BigRedButton.deviceCount(); i++) {
-
-    console.log('opening BigRedButton', i);
-
-    bigRedButton = new BigRedButton.BigRedButton(i);
-
-    bigRedButton.on('buttonPressed', function () {
-            console.log('button pressed');
-        });
-
-    bigRedButton.on('buttonReleased', function () {
-            console.log('button released');
-        });
-
-	bigRedButton.on('lidRaised', function () {
-            console.log('lid raised');
-        });
-	bigRedButton.on('lidClosed', function () {
-            console.log('lid closed');
-        });
-
- }
+function configureButton(button) {
+  button.on('buttonPressed', function () {
+    console.log('button pressed');
+  });
+
+  button.on('buttonReleased', function () {
+    console.log('button released');
+  });
+
+  button.on('lidRaised', function () {
+    console.log('lid raised');
+  });
+  button.on('lidClosed', function () {
+    console.log('lid closed');
+  });
+
+  button.on('buttonGone', function () {
+    console.log('button gone');
+    setTimeout(newButton,1000);
+  });
+}
+
+function newButton() {
+  console.log("Getting button 0")
+  try {
+    bigRedButton=new BigRedButton.BigRedButton(0);
+  }
+  catch(err) {
+      console.log("No button, waiting");
+      setTimeout(newButton,1000);
+      return;
+  }
+
+  configureButton(bigRedButton);
+  console.log("Configured button 0")
+  return;
+}
+
+newButton();