FIX: removes uncessary reports loading (#6119)

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

@@ -4,6 +4,28 @@ import AdminDashboardNext from "admin/models/admin-dashboard-next";
 import Report from "admin/models/report";
 import PeriodComputationMixin from "admin/mixins/period-computation";
 
+const ACTIVITY_METRICS_REPORTS = [
+  "page_view_total_reqs",
+  "visits",
+  "time_to_first_response",
+  "likes",
+  "flags",
+  "user_to_user_private_messages_with_replies"
+];
+
+function dynamicReport(reportType) {
+  return function() {
+    if (this.get("period") !== "monthly") return null;
+    return this.get("reports").find(x => x.type === reportType);
+  }.property("reports.[]", "period");
+}
+
+function staticReport(reportType) {
+  return function() {
+    return this.get("reports").find(x => x.type === reportType);
+  }.property("reports.[]");
+}
+
 export default Ember.Controller.extend(PeriodComputationMixin, {
   isLoading: false,
   dashboardFetchedAt: null,
@@ -25,38 +47,23 @@ export default Ember.Controller.extend(PeriodComputationMixin, {
     return { table: { total: false, limit: 8 } };
   },
 
-  @computed("reports.[]")
-  topReferredTopicsReport(reports) {
-    return reports.find(x => x.type === "top_referred_topics");
-  },
+  signupsReport: dynamicReport("signups"),
+  topicsReport: dynamicReport("topics"),
+  postsReport: dynamicReport("posts"),
+  dauByMauReport: dynamicReport("dau_by_mau"),
+  dailyEngagedUsersReport: dynamicReport("daily_engaged_users"),
+  newContributorsReport: dynamicReport("new_contributors"),
 
-  @computed("reports.[]")
-  trendingSearchReport(reports) {
-    return reports.find(x => x.type === "trending_search");
-  },
-
-  @computed("reports.[]")
-  usersByTypeReport(reports) {
-    return reports.find(x => x.type === "users_by_type");
-  },
-
-  @computed("reports.[]")
-  usersByTrustLevelReport(reports) {
-    return reports.find(x => x.type === "users_by_trust_level");
-  },
+  topReferredTopicsReport: staticReport("top_referred_topics"),
+  trendingSearchReport: staticReport("trending_search"),
+  usersByTypeReport: staticReport("users_by_type"),
+  usersByTrustLevelReport: staticReport("users_by_trust_level"),
 
   @computed("reports.[]")
   activityMetricsReports(reports) {
-    return reports.filter(report => {
-      return [
-        "page_view_total_reqs",
-        "visits",
-        "time_to_first_response",
-        "likes",
-        "flags",
-        "user_to_user_private_messages_with_replies"
-      ].includes(report.type);
-    });
+    return reports.filter(report =>
+      ACTIVITY_METRICS_REPORTS.includes(report.type)
+    );
   },
 
   fetchDashboard() {