Recaptcha support added when reporting screenshots

There's lots of spam recently. We need to do something against it.

Gemfile

@@ -111,3 +111,5 @@ gem 'devise'
 
 # Font Awesome icons
 gem "font-awesome-rails"
+
+gem "recaptcha", require: "recaptcha/rails"

Gemfile.lock

@@ -208,6 +208,8 @@ GEM
       ffi (>= 0.5.0)
     rdoc (4.2.2)
       json (~> 1.4)
+    recaptcha (3.3.0)
+      json
     ref (2.0.0)
     responders (2.1.2)
       railties (>= 4.2.0, < 5.1)
@@ -291,6 +293,7 @@ DEPENDENCIES
   pg_search
   rails (= 4.2.0)
   rails-erd
+  recaptcha
   sass-rails (~> 5.0)
   sdoc (~> 0.4.0)
   slim-rails

app/controllers/packages_controller.rb

@@ -177,10 +177,12 @@ class PackagesController < ApplicationController
   # Receive an anonymous report from a user to have a screenshot removed.
   def report_screenshot
     @screenshot = Screenshot.find(params[:id])
-    @screenshot.delete_reason = params[:delete_reason]
+    if verify_recaptcha
-    @screenshot.markedfordelete = true
+      @screenshot.delete_reason = params[:delete_reason]
-    @screenshot.save!
+      @screenshot.markedfordelete = true
-    flash['notice'] = "Screenshot reported. The moderators will deal with it."
+      @screenshot.save!
+      flash['notice'] = "Screenshot reported. The moderators will deal with it."
+    end
     redirect_to :back
   end
 

app/views/packages/_report_dropdown.slim

@@ -9,4 +9,5 @@
     the screenshot should get removed:
   = form_tag(report_screenshot_path(screenshot.id))
     = text_area_tag 'delete_reason', nil, class: 'input-group-field', maxlength: 100, rows: 3, cols: 50
+    = recaptcha_tags
     = submit_tag 'Request removal', class: 'button alert'

config/initializers/recaptcha.rb

@@ -0,0 +1,4 @@
+Recaptcha.configure do |config|
+  config.public_key  = '6LcliyUTAAAAAIOCkg-c4f4btSEiDJIdwVVixnd2'
+  config.private_key = '6LcliyUTAAAAAHEtx8ow3tkKx4-fQ5gTbvKN82B5'
+end