Door utility and door tracking

* Require >= 45s of time in a door before it counts as "run"

core/door_util.js

@@ -0,0 +1,41 @@
+/* jslint node: true */
+'use strict';
+
+const UserProps     = require('./user_property.js');
+const Events        = require('./events.js');
+const StatLog       = require('./stat_log.js');
+
+const moment        = require('moment');
+
+exports.trackDoorRunBegin   = trackDoorRunBegin;
+exports.trackDoorRunEnd     = trackDoorRunEnd;
+
+
+function trackDoorRunBegin(client, doorTag) {
+    const startTime = moment();
+
+    //  door must be running for >= 45s for us to officially record it
+    const timeout   = setTimeout( () => {
+        StatLog.incrementUserStat(client.user, UserProps.DoorRunTotalCount, 1);
+
+        const eventInfo = { user : client.user };
+        if(doorTag) {
+            eventInfo.doorTag = doorTag;
+        }
+        Events.emit(Events.getSystemEvents().UserRunDoor, eventInfo);
+    }, 45 * 1000);
+
+    return { startTime, timeout, client, doorTag };
+}
+
+function trackDoorRunEnd(trackInfo) {
+    const { startTime, timeout, client } = trackInfo;
+
+    clearTimeout(timeout);
+
+    const endTime = moment();
+    const runTimeMinutes = Math.floor(moment.duration(endTime.diff(startTime)).asMinutes());
+    if(runTimeMinutes > 0) {
+        StatLog.incrementUserStat(client.user, UserProps.DoorRunTotalMinutes, runTimeMinutes);
+    }
+}