Add admin dashboard

app/controllers/admin/dashboard_controller.rb

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+module Admin
+  class DashboardController < ApplicationController
+    def index
+      @manpower_survey = [
+        { name: 'Chapter Manpower', data: {}, points: false  },
+        { name: 'Chapter Count', data: {}, format: 'bar', points: false }
+      ]
+      Chapter.active.each do |c|
+        c.manpower_surveys.each do |s|
+          survey_date = s.survey_date
+          manpower = s.manpower
+          @manpower_survey[0]['data'] ||= {}
+          @manpower_survey[0]['data'][survey_date] ||= 0
+          @manpower_survey[0]['data'][survey_date] += manpower
+          @manpower_survey[1]['data'] ||= {}
+          @manpower_survey[1]['data'][survey_date] ||= 0
+          @manpower_survey[1]['data'][survey_date] += 1
+        end
+      end
+
+      @active_chapters = Chapter.active.size
+
+      @current_manpower = Chapter.where(status: true).sum(:manpower)
+
+      @largest_chapters = Chapter.where(status: true)
+                                 .order('manpower DESC')
+                                 .limit(10)
+
+      @smallest_chapters = Chapter.where(status: true)
+                                  .where('chapters.manpower > 0')
+                                  .order('manpower ASC')
+                                  .limit(10)
+
+      @manpower_distribution = Chapter.where(status: true)
+                                      .order('manpower DESC')
+                                      .pluck(:name, :manpower)
+    end
+  end
+end

app/helpers/admin/dashboard_helper.rb

@@ -0,0 +1,2 @@
+module Admin::DashboardHelper
+end

app/views/admin/_admin_menu.html.erb

@@ -1,4 +1,7 @@
 <ul class="nav">
+  <li class="nav-item">
+    <%= link_to 'Dashboard', admin_path, class: 'nav-link' %>
+  </li>
   <li class="nav-item">
     <%= link_to 'Chapters', admin_chapters_path, class: 'nav-link' %>
   </li>

app/views/admin/chapters/_chapter.html.erb

@@ -33,7 +33,7 @@
 
 <% unless current_page?(admin_chapters_url) %>
 <div id="manpower_chart">
-  <%= line_chart @manpower_survey, title: 'Daily Reported Manpower' %>
+  <%= line_chart @manpower_survey, title: 'Daily Reported Manpower', points: false %>
 </div>
 
 <hr />

app/views/admin/dashboard/_ranking_table.html.erb

@@ -0,0 +1,37 @@
+<h4 class="mb-2"><%= title %></h4>
+<table class="table table-striped table-sm">
+  <tr>
+    <th>Rank</th>
+    <th>Chapter</th>
+    <th>Manpower</th>
+  </tr>
+  <% rank = 1 %>
+  <% chapters.each_with_index do |chapter, index| %>
+    <%
+      # Check if the next row has the same manpower
+      if index + 1 < chapters.length && chapters[index + 1].manpower === chapter.manpower
+        tie = 'T'
+        if index > 0 && chapters[index - 1].manpower != chapter.manpower
+          rank = index + 1
+        end
+      # Check if the previous row has the same manpower
+      elsif index > 0 && chapters[index - 1].manpower === chapter.manpower
+        tie = 'T'
+      # Default to index + 1
+      else
+        rank = index + 1
+        tie = ''
+      end
+    %>
+    <tr>
+      <td class="text-center">
+        <%= tie %><%= rank %>
+      </td>
+      <td>
+        <%= link_to chapter.name, admin_chapter_path(chapter) %>
+        <div><small><%= chapter.institution_name %></small></div>
+      </td>
+      <td class="text-end"><%= chapter.manpower %></td>
+    </tr>
+  <% end %>
+</table>

app/views/admin/dashboard/index.html.erb

@@ -0,0 +1,39 @@
+<%= render 'admin/admin_menu' %>
+
+<div class="row my-3">
+  <div class="col-md-6">
+    <div id="manpower_chart" class="my-3">
+      <%= line_chart @manpower_survey, title: 'Daily Reported Manpower', thousands: ',' %>
+    </div>
+  </div>
+  <div class="col-md-6">
+    <div id="manpower_distribution" class="my-3">
+      <%= column_chart @manpower_distribution, title: 'Manpower Distribution', library: { scales: { x: { display: false } } } %>
+    </div>
+  </div>
+</div>
+
+<div class="row mt-5">
+  <div class="col-md-4 my-3 text-center">
+
+    <div class="mb-4">
+      <div class="display-1">
+        <%= @active_chapters %>
+      </div>
+      Active Chapters
+    </div>
+
+    <div class="mb-4">
+      <div class="display-1">
+        <%= number_with_delimiter(@current_manpower) %>
+      </div>
+      Current Manpower
+    </div>
+  </div>
+    <div class="col-md-4 my-3">
+      <%= render partial: 'admin/dashboard/ranking_table', locals: { title: 'Largest Chapters', chapters: @largest_chapters } %>
+    </div>
+    <div class="col-md-4 my-3">
+      <%= render partial: 'admin/dashboard/ranking_table', locals: { title: 'Smallest Chapters', chapters: @smallest_chapters } %>
+    </div>
+</div>

app/views/admin/districts/_district.html.erb

@@ -18,7 +18,7 @@
 <% unless current_page?(admin_districts_url) %>
 <hr />
 <div id="manpower_chart">
-  <%= line_chart @manpower_survey, title: 'Daily Reported Manpower' %>
+  <%= line_chart @manpower_survey, title: 'Daily Reported Manpower', points: false %>
 </div>
 
 <hr />

config/routes.rb

@@ -6,7 +6,7 @@
 
   authenticate :user do
     namespace :admin do
-      get '/', to: redirect('/admin/chapters')
+      get '/', to: 'dashboard#index'
 
       # Import Chapters
       get 'chapters/import', to: 'chapters#import'

test/controllers/admin/dashboard_controller_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class Admin::DashboardControllerTest < ActionDispatch::IntegrationTest
+  # test "the truth" do
+  #   assert true
+  # end
+end