EXPERIMENTAL: new dashboard UI

This is the first iteration of an effort towards making a very good dashboard.

Until we feel confident this is good, this dashboard will only be accessible through /admin/dashboard_next

app/assets/javascripts/admin/controllers/admin-dashboard-next.js.es6

@@ -0,0 +1,48 @@
+import DiscourseURL from 'discourse/lib/url';
+import computed from 'ember-addons/ember-computed-decorators';
+
+export default Ember.Controller.extend({
+  queryParams: ["period"],
+
+  period: "all",
+
+  @computed("period")
+  startDate(period) {
+    if (period === "all") return null;
+
+    switch (period) {
+      case "yearly":
+        return moment().subtract(1, "year").startOf("day");
+        break;
+      case "quarterly":
+        return moment().subtract(3, "month").startOf("day");
+        break;
+      case "weekly":
+        return moment().subtract(1, "week").startOf("day");
+        break;
+      case "monthly":
+        return moment().subtract(1, "month").startOf("day");
+        break;
+      case "daily":
+        return moment().startOf("day");
+        break;
+    }
+  },
+
+  @computed("period")
+  endDate(period) {
+    if (period === "all") return null;
+
+    return moment().endOf("day");
+  },
+
+  actions: {
+    changePeriod(period) {
+      DiscourseURL.routeTo(this._reportsForPeriodURL(period));
+    }
+  },
+
+  _reportsForPeriodURL(period) {
+    return `/admin/dashboard_next?period=${period}`;
+  }
+});