Adding explorations endpoint

routes/services/invisiblepuzzle/invisiblepuzzle.js

@@ -114,6 +114,55 @@ router.get('/users/sighted', function(req, res, next) {
 
 });
 
+router.get('/explorations/headphones', function(req, res, next) {
+
+    var collection = icarusDb.collection('resources');
+
+    var cursor = collection.aggregate(
+
+        // Pipeline
+        [
+            // Stage 1
+            {
+                $match: {
+                    "appdata.appname" : "Invisible Puzzle",
+                    "userdata.event" : "exploration",
+                    "debug" : false
+                }
+            },
+
+            // Stage 2
+            {
+                $group: {
+                    "_id" : 1,
+                    "explorations" : {
+                        "$sum" : 1
+                    },
+                    "with_hp" : {
+                        "$sum" : {
+                            "$cond" : [
+                                {
+                                    "$eq" : [
+                                        "$userdata.headphones",
+                                        true
+                                    ]
+                                },
+                                1,
+                                0
+                            ]
+                        }
+                    }
+                }
+            }
+
+        ]
+
+    );
+
+    return_cursor(cursor, req, res, next);
+
+});
+
 function return_cursor(cursor, req, res, next){
 
     cursor.toArray(function(err, result) {