Add abuse report management in admin area

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/admin/abuse_reports_controller.rb

+class Admin::AbuseReportsController < Admin::ApplicationController
+  def index
+    @abuse_reports = AbuseReport.order(id: :desc).page(params[:page])
+  end
+
+  def destroy
+    AbuseReport.find(params[:id]).destroy
+
+    redirect_to admin_abuse_reports_path, notice: 'Report was removed'
+  end
+end

app/views/admin/abuse_reports/_abuse_report.html.haml

+- reporter = abuse_report.reporter
+- user = abuse_report.user
+%tr
+  %td
+    - if reporter
+      = link_to reporter.name, [:admin, reporter]
+    - else
+      (removed)
+  %td
+    = abuse_report.created_at.to_s(:short)
+  %td
+    = abuse_report.message
+  %td
+    - if user
+      = link_to user.name, [:admin, user]
+    - else
+      (removed)
+  %td
+    - if user
+      = link_to 'Block', block_admin_user_path(user), data: {confirm: 'USER WILL BE BLOCKED! Are you sure?'}, method: :put, class: "btn btn-xs btn-warning"
+      = link_to 'Remove user', [:admin, user], data: { confirm: "USER #{user.name} WILL BE REMOVED! Are you sure?" }, method: :delete, class: "btn btn-xs btn-remove"
+  %td
+    = link_to 'Remove report', [:admin, abuse_report], method: :delete, class: "btn btn-xs btn-close"

app/views/admin/abuse_reports/index.html.haml

+- page_title "Abuse Reports"
+%h3.page-title Abuse Reports
+%hr
+- if @abuse_reports.present?
+  %table.table
+    %thead
+      %tr
+        %th Reported by
+        %th Reported at
+        %th Message
+        %th User
+        %th
+        %th
+    = render @abuse_reports
+- else
+  %h4 There are no abuse reports

app/views/layouts/nav/_admin.html.haml

@@ -57,6 +57,13 @@
       %span
         Service Templates
 
+  = nav_link(controller: :abuse_reports) do
+    = link_to admin_abuse_reports_path, title: "Abuse reports" do
+      = icon('exclamation-circle fw')
+      %span
+        Abuse Reports
+        %span.count= AbuseReport.count(:all)
+
   = nav_link(controller: :application_settings, html_options: { class: 'separate-item'}) do
     = link_to admin_application_settings_path, title: 'Settings', data: {placement: 'right'} do
       = icon('cogs fw')

config/routes.rb

@@ -168,6 +168,7 @@ Gitlab::Application.routes.draw do
       end
     end
 
+    resources :abuse_reports, only: [:index, :destroy]
     resources :applications
 
     resources :groups, constraints: { id: /[^\/]+/ } do