1 files changed, 24 insertions, 0 deletions
diff --git a/app/scripts/lib/ensnare.js b/app/scripts/lib/ensnare.js
new file mode 100644
index 000000000..b70330a5a
--- /dev/null
+++ b/app/scripts/lib/ensnare.js
@@ -0,0 +1,24 @@
+module.exports = ensnare
+
+// creates a proxy object that calls cb everytime the obj's properties/fns are accessed
+function ensnare(obj, cb){
+  var proxy = {}
+  Object.keys(obj).forEach(function(key){
+    var val = obj[key]
+    switch (typeof val) {
+      case 'function':
+        proxy[key] = function(){
+          cb()
+          val.apply(obj, arguments)
+        }
+        return
+      default:
+        Object.defineProperty(proxy, key, {
+          get: function(){ cb(); return obj[key] },
+          set: function(val){ cb(); return obj[key] = val },
+        })
+        return
+    }
+  })
+  return proxy
+}