Create group milestones service.

app/controllers/groups/milestones_controller.rb

@@ -6,5 +6,7 @@ class Groups::MilestonesController < ApplicationController
     project_ids = @group.projects
     project_milestones = Milestone.where(project_id: project_ids)
     @milestones = project_milestones
+    @group_milestones = Milestones::GroupService.new(@group, current_user, project_milestones)
   end
+
 end

app/services/milestones/group_service.rb

+module Milestones
+  class GroupService < Milestones::BaseService
+    def initialize(group, user, project_milestones)
+      @group = group
+      @user = user
+      @project_milestones = project_milestones.group_by(&:title)
+    end
+
+    def titles
+      @project_milestones.map{ |title, milestone| title }
+    end
+
+    def project_names
+      names = {}
+      @project_milestones.map do |title, milestone|
+        projects = milestone.map{|m| m.project.name }
+        names.store(title, projects)
+      end
+      names
+    end
+
+    def issue_count
+      @project_milestones.merge(@project_milestones){ |title, milestone| milestone.map{|m| m.issues.count }.sum }
+    end
+
+    def mr_count
+      @project_milestones.merge(@project_milestones){ |title, milestone| milestone.map{|m| m.merge_requests.count }.sum }
+    end
+
+    def open_issues_count
+      @project_milestones.merge(@project_milestones){ |title, milestone| milestone.map{|m| m.issues.opened.count }.sum }
+    end
+
+    def closed_issues_count
+      @project_milestones.merge(@project_milestones){ |title, milestone| milestone.map{|m| m.issues.closed.count }.sum }
+    end
+
+    def open_mr_count
+      @project_milestones.merge(@project_milestones){ |title, milestone| milestone.map{|m| m.merge_requests.opened.count }.sum }
+    end
+
+    def close_mr_count
+      @project_milestones.merge(@project_milestones){ |title, milestone| milestone.map{|m| m.merge_requests.closed.count }.sum }
+    end
+
+    def open_items_count
+      open_issues_count.merge(open_mr_count){ |title,issue,mr| issue + mr }
+    end
+
+    def closed_items_count
+      closed_issues_count.merge(close_mr_count){ |title,issue,mr| issue + mr }
+    end
+
+    def total_items_count
+      issue_count.merge(mr_count){ |title,issue,mr| issue + mr }
+    end
+
+    def percent_complete
+      percentage_per_milestone = {}
+      closed_items_count.map do |title, closed_items|
+        total_items = total_items_count[title]
+        percentage = begin
+                       ((closed_items * 100) / total_items).abs
+                     rescue  ZeroDivisionError
+                       100
+                     end
+        percentage_per_milestone.store(title, percentage)
+      end
+      percentage_per_milestone
+    end
+
+  end
+end

app/views/groups/milestones/index.html.haml

@@ -17,11 +17,11 @@
   .col-md-9
     .panel.panel-default
       %ul.well-list
-        - if @milestones.blank?
+        - if @group_milestones.blank?
           %li
             .nothing-here-block No milestones to show
         - else
-          - @milestones.group_by(&:title).each do |milestone|
+          - @group_milestones.titles.each do |title|
             %li{class: "milestone milestone-open", id: 1 }
               .pull-right
                 = link_to root_path, class: "btn btn-small edit-milestone-link btn-grouped" do
@@ -29,4 +29,23 @@
                   Edit
                 = link_to 'Close Milestone', root_path, method: :put, remote: true, class: "btn btn-small btn-remove"
               %h4
-                = link_to_gfm truncate(milestone.first, length: 100), root_path
+                = link_to_gfm truncate(title, length: 100), root_path
+              - if false
+                %span.muted Empty
+              - else
+                %div
+                  %div
+                    = link_to root_path do
+                      = pluralize @group_milestones.issue_count[title], 'Issue'
+                     
+                    = link_to root_path do
+                      = pluralize @group_milestones.mr_count[title], 'Merge Request'
+                     
+                    %span.light #{@group_milestones.percent_complete[title]}% complete
+                  .progress.progress-info
+                  .progress-bar{style: "width: #{@group_milestones.percent_complete[title]}%;"}
+                  %div
+                    %br
+                    - @group_milestones.project_names[title].each do |name|
+                      %span.label.label-default
+                        = name