hourly user signup graph added to Admin home

app/controllers/admin.js

@@ -57,10 +57,11 @@ class AdminController extends SiteController {
   }
 
   async getHomeView (req, res) {
-    const { link: linkService } = this.dtp.services;
+    const { link: linkService, dashboard: dashboardService } = this.dtp.services;
     res.locals.stats = {
       memberCount: await User.estimatedDocumentCount(),
       linkCount: await linkService.getTotalCount(),
+      userSignupHourly: await dashboardService.getUserSignupsPerHour(),
     };
     res.render('admin/index');
   }

app/services/dashboard.js

@@ -7,6 +7,7 @@
 const mongoose = require('mongoose');
 
 const Link = mongoose.model('Link');
+const User = mongoose.model('User');
 const ResourceVisit = mongoose.model('ResourceVisit');
 
 const moment = require('moment');
@@ -434,6 +435,51 @@ class DashboardService extends SiteService {
     await cacheService.setObjectEx(cacheKey, 60 * 5, response);
     return response;
   }
+
+  async getUserSignupsPerHour ( ) {
+    this.log.info('generating user signup stats report');
+
+    const start = moment().subtract(7, 'day').toDate();
+    start.setHours(0, 0, 0, 0);
+
+    const stats = await User.aggregate([
+      {
+        $match: {
+          created: { $gt: start },
+        },
+      },
+      {
+        $group: {
+          _id: {
+            year: { $year: '$created' },
+            month: { $month: '$created' },
+            day: { $dayOfMonth: '$created' },
+            hour: { $hour: '$created' },
+          },
+          count: { $sum: 1 },
+        },
+      },
+      {
+        $project: {
+          _id: false,
+          date: {
+            $dateFromParts: {
+              year: '$_id.year',
+              month: '$_id.month',
+              day: '$_id.day',
+              hour: '$_id.hour',
+            },
+          },
+          count: '$count',
+        },
+      },
+      {
+        $sort: { date: 1 },
+      },
+    ]);
+
+    return stats;
+  }
 }
 
 module.exports = {

app/views/admin/index.pug

@@ -1,8 +1,20 @@
 extends layouts/main
 block content
-  
-  div(uk-grid).uk-grid-small.uk-flex-between.uk-flex-middle
+
+  .uk-margin
+    canvas(id="hourly-signups")
+
+  div(uk-grid).uk-grid-small.uk-flex-middle
     .uk-width-auto
       +renderCell('Members', formatCount(stats.memberCount))
     .uk-width-auto
-      +renderCell('Links', formatCount(stats.linkCount))
+      +renderCell('Links', formatCount(stats.linkCount))
+
+block viewjs
+  script(src="/chart.js/chart.min.js")
+  script(src="/chartjs-adapter-moment/chartjs-adapter-moment.min.js")
+  script.
+    window.addEventListener('dtp-load', ( ) => {
+      const graphData = !{JSON.stringify(stats.userSignupHourly)};
+      dtp.app.renderStatsGraph('#hourly-signups', 'Hourly Signups', graphData);
+    });