added a script to aggregate settings of logged-in users from MongoDB

Change-Id: Id60482999f4baef63da6d76ec4c1604d3c5da921

configuration/settings-agg.js

@@ -0,0 +1,38 @@
+allDatabases = db.adminCommand({ "listDatabases": 1 }).databases
+
+collection = 'PREFERENCES'
+
+acc = {}
+
+allDatabases.forEach(function(d) {
+    //database = connect('localhost:27017/' + d.name)
+    database = db.getSiblingDB(d.name)
+    collections = database.getCollectionNames()
+    if (collections.indexOf(collection) >= 0) {
+        usage = database.getCollection(collection).aggregate([{$unwind: "$KEYS_AND_VALUES"}, {$group: {_id:"$KEYS_AND_VALUES.VALUE", total:{$sum:1}}}])
+
+        usage.forEach(function(u) {
+            if (u._id[0] == '{') {
+                if (u._id in acc) {
+                    acc[u._id] += u.total
+                } else {
+                    acc[u._id] = u.total
+                }
+            }
+        })
+    }
+})
+
+result = []
+for (var key in acc) {
+    if (acc.hasOwnProperty(key)) {
+        result.push({"setting": key, "count": acc[key]})
+    }
+}
+
+result.sort(function(a, b) { return b.count - a.count })
+
+for (var i in result) {
+    print("Setting: " + result[i].setting + "\nCount: " + result[i].count + "\n")
+}
+