Merge branch 'master' into 8-11-stable

48 files changed, 922 insertions, 182 deletions

diff --git a/CHANGELOG b/CHANGELOG
index 993b229f975..fc9291eefd5 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -82,6 +82,7 @@ v 8.11.0 (unreleased)
   - Make "New issue" button in Issue page less obtrusive !5457 (winniehell)
   - Gitlab::Metrics.current_transaction needs to be public for RailsQueueDuration
   - Fix search for notes which belongs to deleted objects
+  - Allow Akismet to be trained by submitting issues as spam or ham !5538
   - Add GitLab Workhorse version to admin dashboard (Katarzyna Kobierska Ula Budziszewska)
   - Allow branch names ending with .json for graph and network page !5579 (winniehell)
   - Add the `sprockets-es6` gem
@@ -114,6 +115,7 @@ v 8.11.0 (unreleased)
   - Add auto-completition in pipeline (Katarzyna Kobierska Ula Budziszewska)
   - Fix a memory leak caused by Banzai::Filter::SanitizationFilter
   - Speed up todos queries by limiting the projects set we join with
+  - Ensure file editing in UI does not overwrite commited changes without warning user
 
 v 8.10.5
   - Add a data migration to fix some missing timestamps in the members table. !5670
diff --git a/Gemfile.lock b/Gemfile.lock
index 3ba6048143c..2244c20203b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -338,7 +338,7 @@ GEM
     httparty (0.13.7)
       json (~> 1.8)
       multi_xml (>= 0.5.2)
-    httpclient (2.7.0.1)
+    httpclient (2.8.2)
     i18n (0.7.0)
     ice_nine (0.11.1)
     influxdb (0.2.3)
diff --git a/app/assets/stylesheets/framework/buttons.scss b/app/assets/stylesheets/framework/buttons.scss
index 473530cf094..f1fe1697d30 100644
--- a/app/assets/stylesheets/framework/buttons.scss
+++ b/app/assets/stylesheets/framework/buttons.scss
@@ -164,6 +164,10 @@
     @include btn-outline($white-light, $orange-normal, $orange-normal, $orange-light, $white-light, $orange-light);
   }
 
+  &.btn-spam {
+    @include btn-outline($white-light, $red-normal, $red-normal, $red-light, $white-light, $red-light);
+  }
+
   &.btn-danger,
   &.btn-remove,
   &.btn-red {
diff --git a/app/controllers/admin/spam_logs_controller.rb b/app/controllers/admin/spam_logs_controller.rb
index 3a2f0185315..2abfa22712d 100644
--- a/app/controllers/admin/spam_logs_controller.rb
+++ b/app/controllers/admin/spam_logs_controller.rb
@@ -14,4 +14,14 @@ class Admin::SpamLogsController < Admin::ApplicationController
       head :ok
     end
   end
+
+  def mark_as_ham
+    spam_log = SpamLog.find(params[:id])
+
+    if HamService.new(spam_log).mark_as_ham!
+      redirect_to admin_spam_logs_path, notice: 'Spam log successfully submitted as ham.'
+    else
+      redirect_to admin_spam_logs_path, alert: 'Error with Akismet. Please check the logs for more info.'
+    end
+  end
 end
diff --git a/app/controllers/concerns/spammable_actions.rb b/app/controllers/concerns/spammable_actions.rb
new file mode 100644
index 00000000000..29e243c66a3
--- /dev/null
+++ b/app/controllers/concerns/spammable_actions.rb
@@ -0,0 +1,25 @@
+module SpammableActions
+  extend ActiveSupport::Concern
+
+  included do
+    before_action :authorize_submit_spammable!, only: :mark_as_spam
+  end
+
+  def mark_as_spam
+    if SpamService.new(spammable).mark_as_spam!
+      redirect_to spammable, notice: "#{spammable.class.to_s} was submitted to Akismet successfully."
+    else
+      redirect_to spammable, alert: 'Error with Akismet. Please check the logs for more info.'
+    end
+  end
+
+  private
+
+  def spammable
+    raise NotImplementedError, "#{self.class} does not implement #{__method__}"
+  end
+
+  def authorize_submit_spammable!
+    access_denied! unless current_user.admin?
+  end
+end
diff --git a/app/controllers/projects/blob_controller.rb b/app/controllers/projects/blob_controller.rb
index 19d051720e9..cdf9a04bacf 100644
--- a/app/controllers/projects/blob_controller.rb
+++ b/app/controllers/projects/blob_controller.rb
@@ -17,6 +17,7 @@ class Projects::BlobController < Projects::ApplicationController
   before_action :require_branch_head, only: [:edit, :update]
   before_action :editor_variables, except: [:show, :preview, :diff]
   before_action :validate_diff_params, only: :diff
+  before_action :set_last_commit_sha, only: [:edit, :update]
 
   def new
     commit unless @repository.empty?
@@ -33,7 +34,6 @@ class Projects::BlobController < Projects::ApplicationController
   end
 
   def edit
-    @last_commit = Gitlab::Git::Commit.last_for_path(@repository, @ref, @path).sha
     blob.load_all_data!(@repository)
   end
 
@@ -55,6 +55,10 @@ class Projects::BlobController < Projects::ApplicationController
     create_commit(Files::UpdateService, success_path: after_edit_path,
                                         failure_view: :edit,
                                         failure_path: namespace_project_blob_path(@project.namespace, @project, @id))
+
+  rescue Files::UpdateService::FileChangedError
+    @conflict = true
+    render :edit
   end
 
   def preview
@@ -152,7 +156,8 @@ class Projects::BlobController < Projects::ApplicationController
       file_path: @file_path,
       commit_message: params[:commit_message],
       file_content: params[:content],
-      file_content_encoding: params[:encoding]
+      file_content_encoding: params[:encoding],
+      last_commit_sha: params[:last_commit_sha]
     }
   end
 
@@ -161,4 +166,9 @@ class Projects::BlobController < Projects::ApplicationController
       render nothing: true
     end
   end
+
+  def set_last_commit_sha
+    @last_commit_sha = Gitlab::Git::Commit.
+      last_for_path(@repository, @ref, @path).sha
+  end
 end
diff --git a/app/controllers/projects/issues_controller.rb b/app/controllers/projects/issues_controller.rb
index 660e0eba06f..e9fb11e8f94 100644
--- a/app/controllers/projects/issues_controller.rb
+++ b/app/controllers/projects/issues_controller.rb
@@ -4,6 +4,7 @@ class Projects::IssuesController < Projects::ApplicationController
   include IssuableActions
   include ToggleAwardEmoji
   include IssuableCollections
+  include SpammableActions
 
   before_action :redirect_to_external_issue_tracker, only: [:index, :new]
   before_action :module_enabled
@@ -185,6 +186,7 @@ class Projects::IssuesController < Projects::ApplicationController
   alias_method :subscribable_resource, :issue
   alias_method :issuable, :issue
   alias_method :awardable, :issue
+  alias_method :spammable, :issue
 
   def authorize_read_issue!
     return render_404 unless can?(current_user, :read_issue, @issue)
diff --git a/app/helpers/sorting_helper.rb b/app/helpers/sorting_helper.rb
index e1c0b497550..8b138a8e69f 100644
--- a/app/helpers/sorting_helper.rb
+++ b/app/helpers/sorting_helper.rb
@@ -20,13 +20,19 @@ module SortingHelper
   end
 
   def projects_sort_options_hash
-    {
+    options = {
       sort_value_name => sort_title_name,
       sort_value_recently_updated => sort_title_recently_updated,
       sort_value_oldest_updated => sort_title_oldest_updated,
       sort_value_recently_created => sort_title_recently_created,
       sort_value_oldest_created => sort_title_oldest_created,
     }
+
+    if current_controller?('admin/projects')
+      options.merge!(sort_value_largest_repo => sort_title_largest_repo)
+    end
+
+    options
   end
 
   def sort_title_priority
diff --git a/app/models/concerns/spammable.rb b/app/models/concerns/spammable.rb
index 3b8e6df2da9..ce54fe5d3bf 100644
--- a/app/models/concerns/spammable.rb
+++ b/app/models/concerns/spammable.rb
@@ -1,9 +1,32 @@
 module Spammable
   extend ActiveSupport::Concern
 
+  module ClassMethods
+    def attr_spammable(attr, options = {})
+      spammable_attrs << [attr.to_s, options]
+    end
+  end
+
   included do
+    has_one :user_agent_detail, as: :subject, dependent: :destroy
+
     attr_accessor :spam
+
     after_validation :check_for_spam, on: :create
+
+    cattr_accessor :spammable_attrs, instance_accessor: false do
+      []
+    end
+
+    delegate :ip_address, :user_agent, to: :user_agent_detail, allow_nil: true
+  end
+
+  def submittable_as_spam?
+    if user_agent_detail
+      user_agent_detail.submittable?
+    else
+      false
+    end
   end
 
   def spam?
@@ -13,4 +36,33 @@ module Spammable
   def check_for_spam
     self.errors.add(:base, "Your #{self.class.name.underscore} has been recognized as spam and has been discarded.") if spam?
   end
+
+  def spam_title
+    attr = self.class.spammable_attrs.find do |_, options|
+      options.fetch(:spam_title, false)
+    end
+
+    public_send(attr.first) if attr && respond_to?(attr.first.to_sym)
+  end
+
+  def spam_description
+    attr = self.class.spammable_attrs.find do |_, options|
+      options.fetch(:spam_description, false)
+    end
+
+    public_send(attr.first) if attr && respond_to?(attr.first.to_sym)
+  end
+
+  def spammable_text
+    result = self.class.spammable_attrs.map do |attr|
+      public_send(attr.first)
+    end
+
+    result.reject(&:blank?).join("\n")
+  end
+
+  # Override in Spammable if further checks are necessary
+  def check_for_spam?
+    true
+  end
 end
diff --git a/app/models/issue.rb b/app/models/issue.rb
index d62ffb21467..788611305fe 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -36,6 +36,9 @@ class Issue < ActiveRecord::Base
   scope :order_due_date_asc, -> { reorder('issues.due_date IS NULL, issues.due_date ASC') }
   scope :order_due_date_desc, -> { reorder('issues.due_date IS NULL, issues.due_date DESC') }
 
+  attr_spammable :title, spam_title: true
+  attr_spammable :description, spam_description: true
+
   state_machine :state, initial: :opened do
     event :close do
       transition [:reopened, :opened] => :closed
@@ -262,4 +265,9 @@ class Issue < ActiveRecord::Base
   def overdue?
     due_date.try(:past?) || false
   end
+
+  # Only issues on public projects should be checked for spam
+  def check_for_spam?
+    project.public?
+  end
 end
diff --git a/app/models/spam_log.rb b/app/models/spam_log.rb
index 12df68ef83b..3b8b9833565 100644
--- a/app/models/spam_log.rb
+++ b/app/models/spam_log.rb
@@ -7,4 +7,8 @@ class SpamLog < ActiveRecord::Base
     user.block
     user.destroy
   end
+
+  def text
+    [title, description].join("\n")
+  end
 end
diff --git a/app/models/user_agent_detail.rb b/app/models/user_agent_detail.rb
new file mode 100644
index 00000000000..0949c6ef083
--- /dev/null
+++ b/app/models/user_agent_detail.rb
@@ -0,0 +1,9 @@
+class UserAgentDetail < ActiveRecord::Base
+  belongs_to :subject, polymorphic: true
+
+  validates :user_agent, :ip_address, :subject_id, :subject_type, presence: true
+
+  def submittable?
+    !submitted?
+  end
+end
diff --git a/app/services/akismet_service.rb b/app/services/akismet_service.rb
new file mode 100644
index 00000000000..5c60addbe7c
--- /dev/null
+++ b/app/services/akismet_service.rb
@@ -0,0 +1,79 @@
+class AkismetService
+  attr_accessor :owner, :text, :options
+
+  def initialize(owner, text, options = {})
+    @owner = owner
+    @text = text
+    @options = options
+  end
+
+  def is_spam?
+    return false unless akismet_enabled?
+
+    params = {
+      type: 'comment',
+      text: text,
+      created_at: DateTime.now,
+      author: owner.name,
+      author_email: owner.email,
+      referrer: options[:referrer],
+    }
+
+    begin
+      is_spam, is_blatant = akismet_client.check(options[:ip_address], options[:user_agent], params)
+      is_spam || is_blatant
+    rescue => e
+      Rails.logger.error("Unable to connect to Akismet: #{e}, skipping check")
+      false
+    end
+  end
+
+  def submit_ham
+    return false unless akismet_enabled?
+
+    params = {
+      type: 'comment',
+      text: text,
+      author: owner.name,
+      author_email: owner.email
+    }
+
+    begin
+      akismet_client.submit_ham(options[:ip_address], options[:user_agent], params)
+      true
+    rescue => e
+      Rails.logger.error("Unable to connect to Akismet: #{e}, skipping!")
+      false
+    end
+  end
+
+  def submit_spam
+    return false unless akismet_enabled?
+
+    params = {
+      type: 'comment',
+      text: text,
+      author: owner.name,
+      author_email: owner.email
+    }
+
+    begin
+      akismet_client.submit_spam(options[:ip_address], options[:user_agent], params)
+      true
+    rescue => e
+      Rails.logger.error("Unable to connect to Akismet: #{e}, skipping!")
+      false
+    end
+  end
+
+  private
+
+  def akismet_client
+    @akismet_client ||= ::Akismet::Client.new(current_application_settings.akismet_api_key,
+                                              Gitlab.config.gitlab.url)
+  end
+
+  def akismet_enabled?
+    current_application_settings.akismet_enabled
+  end
+end
diff --git a/app/services/create_spam_log_service.rb b/app/services/create_spam_log_service.rb
deleted file mode 100644
index 59a66fde47a..00000000000
--- a/app/services/create_spam_log_service.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-class CreateSpamLogService < BaseService
-  def initialize(project, user, params)
-    super(project, user, params)
-  end
-
-  def execute
-    spam_params = params.merge({ user_id: @current_user.id,
-                                 project_id: @project.id } )
-    spam_log = SpamLog.new(spam_params)
-    spam_log.save
-    spam_log
-  end
-end
diff --git a/app/services/files/base_service.rb b/app/services/files/base_service.rb
index c4a206f785e..ea94818713b 100644
--- a/app/services/files/base_service.rb
+++ b/app/services/files/base_service.rb
@@ -15,6 +15,7 @@ module Files
                         else
                           params[:file_content]
                         end
+      @last_commit_sha = params[:last_commit_sha]
 
       # Validate parameters
       validate
diff --git a/app/services/files/update_service.rb b/app/services/files/update_service.rb
index 8d2b5083179..4fc3b640799 100644
--- a/app/services/files/update_service.rb
+++ b/app/services/files/update_service.rb
@@ -2,11 +2,34 @@ require_relative "base_service"
 
 module Files
   class UpdateService < Files::BaseService
+    class FileChangedError < StandardError; end
+
     def commit
       repository.update_file(current_user, @file_path, @file_content,
                              branch: @target_branch,
                              previous_path: @previous_path,
                              message: @commit_message)
     end
+
+    private
+
+    def validate
+      super
+
+      if file_has_changed?
+        raise FileChangedError.new("You are attempting to update a file that has changed since you started editing it.")
+      end
+    end
+
+    def file_has_changed?
+      return false unless @last_commit_sha && last_commit
+
+      @last_commit_sha != last_commit.sha
+    end
+
+    def last_commit
+      @last_commit ||= Gitlab::Git::Commit.
+        last_for_path(@source_project.repository, @source_branch, @file_path)
+    end
   end
 end
diff --git a/app/services/ham_service.rb b/app/services/ham_service.rb
new file mode 100644
index 00000000000..b0e1799b489
--- /dev/null
+++ b/app/services/ham_service.rb
@@ -0,0 +1,26 @@
+class HamService
+  attr_accessor :spam_log
+
+  def initialize(spam_log)
+    @spam_log = spam_log
+  end
+
+  def mark_as_ham!
+    if akismet.submit_ham
+      spam_log.update_attribute(:submitted_as_ham, true)
+    else
+      false
+    end
+  end
+
+  private
+
+  def akismet
+    @akismet ||= AkismetService.new(
+      spam_log.user,
+      spam_log.text,
+      ip_address: spam_log.source_ip,
+      user_agent: spam_log.user_agent
+    )
+  end
+end
diff --git a/app/services/issues/create_service.rb b/app/services/issues/create_service.rb
index 5e2de2ccf64..65550ab8ec6 100644
--- a/app/services/issues/create_service.rb
+++ b/app/services/issues/create_service.rb
@@ -3,29 +3,34 @@ module Issues
     def execute
       filter_params
       label_params = params.delete(:label_ids)
-      request = params.delete(:request)
-      api = params.delete(:api)
-      issue = project.issues.new(params)
-      issue.author = params[:author] || current_user
+      @request = params.delete(:request)
+      @api = params.delete(:api)
+      @issue = project.issues.new(params)
+      @issue.author = params[:author] || current_user
 
-      issue.spam = spam_check_service.execute(request, api)
+      @issue.spam = spam_service.check(@api)
 
-      if issue.save
-        issue.update_attributes(label_ids: label_params)
-        notification_service.new_issue(issue, current_user)
-        todo_service.new_issue(issue, current_user)
-        event_service.open_issue(issue, current_user)
-        issue.create_cross_references!(current_user)
-        execute_hooks(issue, 'open')
+      if @issue.save
+        @issue.update_attributes(label_ids: label_params)
+        notification_service.new_issue(@issue, current_user)
+        todo_service.new_issue(@issue, current_user)
+        event_service.open_issue(@issue, current_user)
+        user_agent_detail_service.create
+        @issue.create_cross_references!(current_user)
+        execute_hooks(@issue, 'open')
       end
 
-      issue
+      @issue
     end
 
     private
 
-    def spam_check_service
-      SpamCheckService.new(project, current_user, params)
+    def spam_service
+      SpamService.new(@issue, @request)
+    end
+
+    def user_agent_detail_service
+      UserAgentDetailService.new(@issue, @request)
     end
   end
 end
diff --git a/app/services/spam_check_service.rb b/app/services/spam_check_service.rb
deleted file mode 100644
index 7c3e692bde9..00000000000
--- a/app/services/spam_check_service.rb
+++ /dev/null
@@ -1,38 +0,0 @@
-class SpamCheckService < BaseService
-  include Gitlab::AkismetHelper
-
-  attr_accessor :request, :api
-
-  def execute(request, api)
-    @request, @api = request, api
-    return false unless request || check_for_spam?(project)
-    return false unless is_spam?(request.env, current_user, text)
-    
-    create_spam_log
-
-    true
-  end
-
-  private
-
-  def text
-    [params[:title], params[:description]].reject(&:blank?).join("\n")
-  end
-  
-  def spam_log_attrs
-    {
-      user_id: current_user.id,
-      project_id: project.id,
-      title: params[:title],
-      description: params[:description],
-      source_ip: client_ip(request.env),
-      user_agent: user_agent(request.env),
-      noteable_type: 'Issue',
-      via_api: api
-    }
-  end
-
-  def create_spam_log
-    CreateSpamLogService.new(project, current_user, spam_log_attrs).execute
-  end
-end
diff --git a/app/services/spam_service.rb b/app/services/spam_service.rb
new file mode 100644
index 00000000000..48903291799
--- /dev/null
+++ b/app/services/spam_service.rb
@@ -0,0 +1,78 @@
+class SpamService
+  attr_accessor :spammable, :request, :options
+
+  def initialize(spammable, request = nil)
+    @spammable = spammable
+    @request = request
+    @options = {}
+
+    if @request
+      @options[:ip_address] = @request.env['action_dispatch.remote_ip'].to_s
+      @options[:user_agent] = @request.env['HTTP_USER_AGENT']
+      @options[:referrer] = @request.env['HTTP_REFERRER']
+    else
+      @options[:ip_address] = @spammable.ip_address
+      @options[:user_agent] = @spammable.user_agent
+    end
+  end
+
+  def check(api = false)
+    return false unless request && check_for_spam?
+
+    return false unless akismet.is_spam?
+
+    create_spam_log(api)
+    true
+  end
+
+  def mark_as_spam!
+    return false unless spammable.submittable_as_spam?
+
+    if akismet.submit_spam
+      spammable.user_agent_detail.update_attribute(:submitted, true)
+    else
+      false
+    end
+  end
+
+  private
+
+  def akismet
+    @akismet ||= AkismetService.new(
+      spammable_owner,
+      spammable.spammable_text,
+      options
+    )
+  end
+
+  def spammable_owner
+    @user ||= User.find(spammable_owner_id)
+  end
+
+  def spammable_owner_id
+    @owner_id ||=
+      if spammable.respond_to?(:author_id)
+        spammable.author_id
+      elsif spammable.respond_to?(:creator_id)
+        spammable.creator_id
+      end
+  end
+
+  def check_for_spam?
+    spammable.check_for_spam?
+  end
+
+  def create_spam_log(api)
+    SpamLog.create(
+      {
+        user_id: spammable_owner_id,
+        title: spammable.spam_title,
+        description: spammable.spam_description,
+        source_ip: options[:ip_address],
+        user_agent: options[:user_agent],
+        noteable_type: spammable.class.to_s,
+        via_api: api
+      }
+    )
+  end
+end
diff --git a/app/services/user_agent_detail_service.rb b/app/services/user_agent_detail_service.rb
new file mode 100644
index 00000000000..a1ee3df5fe1
--- /dev/null
+++ b/app/services/user_agent_detail_service.rb
@@ -0,0 +1,13 @@
+class UserAgentDetailService
+  attr_accessor :spammable, :request
+
+  def initialize(spammable, request)
+    @spammable, @request = spammable, request
+  end
+
+  def create
+    return unless request
+
+    spammable.create_user_agent_detail(user_agent: request.env['HTTP_USER_AGENT'], ip_address: request.env['action_dispatch.remote_ip'].to_s)
+  end
+end
diff --git a/app/views/admin/spam_logs/_spam_log.html.haml b/app/views/admin/spam_logs/_spam_log.html.haml
index 8aea67f4497..4ce4eab8753 100644
--- a/app/views/admin/spam_logs/_spam_log.html.haml
+++ b/app/views/admin/spam_logs/_spam_log.html.haml
@@ -24,6 +24,11 @@
       = link_to 'Remove user', admin_spam_log_path(spam_log, remove_user: true),
         data: { confirm: "USER #{user.name} WILL BE REMOVED! Are you sure?" }, method: :delete, class: "btn btn-xs btn-remove"
   %td
+    - if spam_log.submitted_as_ham?
+      .btn.btn-xs.disabled
+        Submitted as ham
+    - else
+      = link_to 'Submit as ham', mark_as_ham_admin_spam_log_path(spam_log), method: :post, class: 'btn btn-xs btn-warning'
     - if user && !user.blocked?
       = link_to 'Block user', block_admin_user_path(user), data: {confirm: 'USER WILL BE BLOCKED! Are you sure?'}, method: :put, class: "btn btn-xs"
     - else
diff --git a/app/views/projects/blob/edit.html.haml b/app/views/projects/blob/edit.html.haml
index b1c9895f43e..7b0621f9401 100644
--- a/app/views/projects/blob/edit.html.haml
+++ b/app/views/projects/blob/edit.html.haml
@@ -1,5 +1,11 @@
 - page_title "Edit", @blob.path, @ref
 
+- if @conflict
+  .alert.alert-danger
+    Someone edited the file the same time you did. Please check out
+    = link_to "the file", namespace_project_blob_path(@project.namespace, @project, tree_join(@target_branch, @file_path)), target: "_blank"
+    and make sure your changes will not unintentionally remove theirs.
+
 .file-editor
   %ul.nav-links.no-bottom.js-edit-mode
     %li.active
@@ -13,8 +19,7 @@
   = form_tag(namespace_project_update_blob_path(@project.namespace, @project, @id), method: :put, class: 'form-horizontal js-quick-submit js-requires-input js-edit-blob-form') do
     = render 'projects/blob/editor', ref: @ref, path: @path, blob_data: @blob.data
     = render 'shared/new_commit_form', placeholder: "Update #{@blob.name}"
-
-    = hidden_field_tag 'last_commit', @last_commit
+    = hidden_field_tag 'last_commit_sha', @last_commit_sha
     = hidden_field_tag 'content', '', id: "file-content"
     = hidden_field_tag 'from_merge_request_id', params[:from_merge_request_id]
     = render 'projects/commit_button', ref: @ref, cancel_path: namespace_project_blob_path(@project.namespace, @project, @id)
diff --git a/app/views/projects/issues/show.html.haml b/app/views/projects/issues/show.html.haml
index e5cce16a171..9f1a046ea74 100644
--- a/app/views/projects/issues/show.html.haml
+++ b/app/views/projects/issues/show.html.haml
@@ -37,14 +37,19 @@
                 = link_to 'Close issue', issue_path(@issue, issue: { state_event: :close }, status_only: true, format: 'json'), data: {no_turbolink: true}, class: "btn-close #{issue_button_visibility(@issue, true)}", title: 'Close issue'
               %li
                 = link_to 'Edit', edit_namespace_project_issue_path(@project.namespace, @project, @issue)
+            - if @issue.submittable_as_spam? && current_user.admin?
+              %li
+                = link_to 'Submit as spam', mark_as_spam_namespace_project_issue_path(@project.namespace, @project, @issue), method: :post, class: 'btn-spam', title: 'Submit as spam'
+
         - if can?(current_user, :create_issue, @project)
           = link_to new_namespace_project_issue_path(@project.namespace, @project), class: 'hidden-xs hidden-sm btn btn-grouped new-issue-link btn-new btn-inverted', title: 'New issue', id: 'new_issue_link' do
             New issue
         - if can?(current_user, :update_issue, @issue)
           = link_to 'Reopen issue', issue_path(@issue, issue: { state_event: :reopen }, status_only: true, format: 'json'), data: {no_turbolink: true}, class: "hidden-xs hidden-sm btn btn-grouped btn-reopen #{issue_button_visibility(@issue, false)}", title: 'Reopen issue'
           = link_to 'Close issue', issue_path(@issue, issue: { state_event: :close }, status_only: true, format: 'json'), data: {no_turbolink: true}, class: "hidden-xs hidden-sm btn btn-grouped btn-close #{issue_button_visibility(@issue, true)}", title: 'Close issue'
-          = link_to edit_namespace_project_issue_path(@project.namespace, @project, @issue), class: 'hidden-xs hidden-sm btn btn-grouped issuable-edit' do
-            Edit
+          - if @issue.submittable_as_spam? && current_user.admin?
+            = link_to 'Submit as spam', mark_as_spam_namespace_project_issue_path(@project.namespace, @project, @issue), method: :post, class: 'hidden-xs hidden-sm btn btn-grouped btn-spam', title: 'Submit as spam'
+          = link_to 'Edit', edit_namespace_project_issue_path(@project.namespace, @project, @issue), class: 'hidden-xs hidden-sm btn btn-grouped issuable-edit'
 
 
 .issue-details.issuable-details
diff --git a/config/routes.rb b/config/routes.rb
index cf6773917cf..1d2db91344f 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -252,7 +252,11 @@ Rails.application.routes.draw do
     resource :impersonation, only: :destroy
 
     resources :abuse_reports, only: [:index, :destroy]
-    resources :spam_logs, only: [:index, :destroy]
+    resources :spam_logs, only: [:index, :destroy] do
+      member do
+        post :mark_as_ham
+      end
+    end
 
     resources :applications
 
@@ -813,6 +817,7 @@ Rails.application.routes.draw do
           member do
             post :toggle_subscription
             post :toggle_award_emoji
+            post :mark_as_spam
             get :referenced_merge_requests
             get :related_branches
             get :can_create_branch
diff --git a/db/migrate/20160727163552_create_user_agent_details.rb b/db/migrate/20160727163552_create_user_agent_details.rb
new file mode 100644
index 00000000000..ed4ccfedc0a
--- /dev/null
+++ b/db/migrate/20160727163552_create_user_agent_details.rb
@@ -0,0 +1,18 @@
+class CreateUserAgentDetails < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  def change
+    create_table :user_agent_details do |t|
+      t.string :user_agent, null: false
+      t.string :ip_address, null: false
+      t.integer :subject_id, null: false
+      t.string :subject_type, null: false
+      t.boolean :submitted, default: false, null: false
+
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/migrate/20160729173930_remove_project_id_from_spam_logs.rb b/db/migrate/20160729173930_remove_project_id_from_spam_logs.rb
new file mode 100644
index 00000000000..e28ab31d629
--- /dev/null
+++ b/db/migrate/20160729173930_remove_project_id_from_spam_logs.rb
@@ -0,0 +1,29 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class RemoveProjectIdFromSpamLogs < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = true
+
+  # When a migration requires downtime you **must** uncomment the following
+  # constant and define a short and easy to understand explanation as to why the
+  # migration requires downtime.
+  DOWNTIME_REASON = 'Removing a column that contains data that is not used anywhere.'
+
+  # When using the methods "add_concurrent_index" or "add_column_with_default"
+  # you must disable the use of transactions as these methods can not run in an
+  # existing transaction. When using "add_concurrent_index" make sure that this
+  # method is the _only_ method called in the migration, any other changes
+  # should go in a separate migration. This ensures that upon failure _only_ the
+  # index creation fails and can be retried or reverted easily.
+  #
+  # To disable transactions uncomment the following line and remove these
+  # comments:
+  # disable_ddl_transaction!
+
+  def change
+    remove_column :spam_logs, :project_id, :integer
+  end
+end
diff --git a/db/migrate/20160801163709_add_submitted_as_ham_to_spam_logs.rb b/db/migrate/20160801163709_add_submitted_as_ham_to_spam_logs.rb
new file mode 100644
index 00000000000..296f1dfac7b
--- /dev/null
+++ b/db/migrate/20160801163709_add_submitted_as_ham_to_spam_logs.rb
@@ -0,0 +1,20 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddSubmittedAsHamToSpamLogs < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  # When a migration requires downtime you **must** uncomment the following
+  # constant and define a short and easy to understand explanation as to why the
+  # migration requires downtime.
+  # DOWNTIME_REASON = ''
+
+  disable_ddl_transaction!
+
+  def change
+    add_column_with_default :spam_logs, :submitted_as_ham, :boolean, default: false
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index f008a6bd7a7..52ba60ace11 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -926,12 +926,12 @@ ActiveRecord::Schema.define(version: 20160810142633) do
     t.string   "source_ip"
     t.string   "user_agent"
     t.boolean  "via_api"
-    t.integer  "project_id"
     t.string   "noteable_type"
     t.string   "title"
     t.text     "description"
     t.datetime "created_at",    null: false
     t.datetime "updated_at",    null: false
+    t.boolean  "submitted_as_ham", default: false, null: false
   end
 
   create_table "subscriptions", force: :cascade do |t|
@@ -999,6 +999,16 @@ ActiveRecord::Schema.define(version: 20160810142633) do
   add_index "u2f_registrations", ["key_handle"], name: "index_u2f_registrations_on_key_handle", using: :btree
   add_index "u2f_registrations", ["user_id"], name: "index_u2f_registrations_on_user_id", using: :btree
 
+  create_table "user_agent_details", force: :cascade do |t|
+    t.string   "user_agent",   null: false
+    t.string   "ip_address",   null: false
+    t.integer  "subject_id",   null: false
+    t.string   "subject_type", null: false
+    t.boolean  "submitted",    default: false, null: false
+    t.datetime "created_at",   null: false
+    t.datetime "updated_at",   null: false
+  end
+
   create_table "users", force: :cascade do |t|
     t.string   "email",                       default: "",    null: false
     t.string   "encrypted_password",          default: "",    null: false
diff --git a/doc/integration/akismet.md b/doc/integration/akismet.md
index c222d21612f..06c787cfcc7 100644
--- a/doc/integration/akismet.md
+++ b/doc/integration/akismet.md
@@ -33,3 +33,26 @@ To use Akismet:
 7. Save the configuration.
 
 ![Screenshot of Akismet settings](img/akismet_settings.png)
+
+
+## Training
+
+> *Note:* Training the Akismet filter is only available in 8.11 and above.
+
+As a way to better recognize between spam and ham, you can train the Akismet
+filter whenever there is a false positive or false negative.
+
+When an entry is recognized as spam, it is rejected and added to the Spam Logs. 
+From here you can review if they are really spam. If one of them is not really
+spam, you can use the `Submit as ham` button to tell Akismet that it falsely 
+recognized an entry as spam.
+
+![Screenshot of Spam Logs](img/spam_log.png)
+
+If an entry that is actually spam was not recognized as such, you will be able
+to also submit this to Akismet. The `Submit as spam` button will only appear
+to admin users.
+
+![Screenshot of Issue](img/submit_issue.png)
+
+Training Akismet will help it to recognize spam more accurately in the future.
diff --git a/doc/integration/img/spam_log.png b/doc/integration/img/spam_log.png
new file mode 100644
index 00000000000..8d574448690
--- /dev/null
+++ b/doc/integration/img/spam_log.png
diff --git a/doc/integration/img/submit_issue.png b/doc/integration/img/submit_issue.png
new file mode 100644
index 00000000000..9fd9c20f6b3
--- /dev/null
+++ b/doc/integration/img/submit_issue.png
diff --git a/features/project/merge_requests.feature b/features/project/merge_requests.feature
index 6bac6011467..1b8e4262e40 100644
--- a/features/project/merge_requests.feature
+++ b/features/project/merge_requests.feature
@@ -107,16 +107,6 @@ Feature: Project Merge Requests
     Then The list should be sorted by "Least popular"
 
   @javascript
-  Scenario: I comment on a merge request diff
-    Given project "Shop" have "Bug NS-05" open merge request with diffs inside
-    And I visit merge request page "Bug NS-05"
-    And I click on the Changes tab
-    And I leave a comment like "Line is wrong" on diff
-    And I switch to the merge request's comments tab
-    Then I should see a discussion has started on diff
-    And I should see a badge of "1" next to the discussion link
-
-  @javascript
   Scenario: I see a new comment on merge request diff from another user in the discussion tab
     Given project "Shop" have "Bug NS-05" open merge request with diffs inside
     And I visit merge request page "Bug NS-05"
diff --git a/lib/api/issues.rb b/lib/api/issues.rb
index c4d3134da6c..077258faee1 100644
--- a/lib/api/issues.rb
+++ b/lib/api/issues.rb
@@ -3,8 +3,6 @@ module API
   class Issues < Grape::API
     before { authenticate! }
 
-    helpers ::Gitlab::AkismetHelper
-
     helpers do
       def filter_issues_state(issues, state)
         case state
diff --git a/lib/gitlab/akismet_helper.rb b/lib/gitlab/akismet_helper.rb
deleted file mode 100644
index 207736b59db..00000000000
--- a/lib/gitlab/akismet_helper.rb
+++ /dev/null
@@ -1,47 +0,0 @@
-module Gitlab
-  module AkismetHelper
-    def akismet_enabled?
-      current_application_settings.akismet_enabled
-    end
-
-    def akismet_client
-      @akismet_client ||= ::Akismet::Client.new(current_application_settings.akismet_api_key,
-        Gitlab.config.gitlab.url)
-    end
-
-    def client_ip(env)
-      env['action_dispatch.remote_ip'].to_s
-    end
-
-    def user_agent(env)
-      env['HTTP_USER_AGENT']
-    end
-
-    def check_for_spam?(project)
-      akismet_enabled? && project.public?
-    end
-
-    def is_spam?(environment, user, text)
-      client = akismet_client
-      ip_address = client_ip(environment)
-      user_agent = user_agent(environment)
-
-      params = {
-        type: 'comment',
-        text: text,
-        created_at: DateTime.now,
-        author: user.name,
-        author_email: user.email,
-        referrer: environment['HTTP_REFERER'],
-      }
-
-      begin
-        is_spam, is_blatant = client.check(ip_address, user_agent, params)
-        is_spam || is_blatant
-      rescue => e
-        Rails.logger.error("Unable to connect to Akismet: #{e}, skipping check")
-        false
-      end
-    end
-  end
-end
diff --git a/spec/controllers/admin/groups_controller_spec.rb b/spec/controllers/admin/groups_controller_spec.rb
index 0239aea47fb..602de72d23f 100644
--- a/spec/controllers/admin/groups_controller_spec.rb
+++ b/spec/controllers/admin/groups_controller_spec.rb
@@ -7,12 +7,13 @@ describe Admin::GroupsController do
 
   before do
     sign_in(admin)
-    Sidekiq::Testing.fake!
   end
 
   describe 'DELETE #destroy' do
     it 'schedules a group destroy' do
-      expect { delete :destroy, id: project.group.path }.to change(GroupDestroyWorker.jobs, :size).by(1)
+      Sidekiq::Testing.fake! do
+        expect { delete :destroy, id: project.group.path }.to change(GroupDestroyWorker.jobs, :size).by(1)
+      end
     end
 
     it 'redirects to the admin group path' do
diff --git a/spec/controllers/admin/spam_logs_controller_spec.rb b/spec/controllers/admin/spam_logs_controller_spec.rb
index 520a4f6f9c5..585ca31389d 100644
--- a/spec/controllers/admin/spam_logs_controller_spec.rb
+++ b/spec/controllers/admin/spam_logs_controller_spec.rb
@@ -34,4 +34,16 @@ describe Admin::SpamLogsController do
       expect { User.find(user.id) }.to raise_error(ActiveRecord::RecordNotFound)
     end
   end
+
+  describe '#mark_as_ham' do
+    before do
+      allow_any_instance_of(AkismetService).to receive(:submit_ham).and_return(true)
+    end
+    it 'submits the log as ham' do
+      post :mark_as_ham, id: first_spam.id
+
+      expect(response).to have_http_status(302)
+      expect(SpamLog.find(first_spam.id).submitted_as_ham).to be_truthy
+    end
+  end
 end
diff --git a/spec/controllers/groups_controller_spec.rb b/spec/controllers/groups_controller_spec.rb
index 4ae6364207b..a763e2c5ba8 100644
--- a/spec/controllers/groups_controller_spec.rb
+++ b/spec/controllers/groups_controller_spec.rb
@@ -89,12 +89,13 @@ describe GroupsController do
 
     context 'as the group owner' do
       before do
-        Sidekiq::Testing.fake!
         sign_in(user)
       end
 
       it 'schedules a group destroy' do
-        expect { delete :destroy, id: group.path }.to change(GroupDestroyWorker.jobs, :size).by(1)
+        Sidekiq::Testing.fake! do
+          expect { delete :destroy, id: group.path }.to change(GroupDestroyWorker.jobs, :size).by(1)
+        end
       end
 
       it 'redirects to the root path' do
diff --git a/spec/controllers/projects/issues_controller_spec.rb b/spec/controllers/projects/issues_controller_spec.rb
index b6a0276846c..0836b71056c 100644
--- a/spec/controllers/projects/issues_controller_spec.rb
+++ b/spec/controllers/projects/issues_controller_spec.rb
@@ -274,8 +274,8 @@ describe Projects::IssuesController do
   describe 'POST #create' do
     context 'Akismet is enabled' do
       before do
-        allow_any_instance_of(Gitlab::AkismetHelper).to receive(:check_for_spam?).and_return(true)
-        allow_any_instance_of(Gitlab::AkismetHelper).to receive(:is_spam?).and_return(true)
+        allow_any_instance_of(SpamService).to receive(:check_for_spam?).and_return(true)
+        allow_any_instance_of(AkismetService).to receive(:is_spam?).and_return(true)
       end
 
       def post_spam_issue
@@ -300,6 +300,52 @@ describe Projects::IssuesController do
         expect(spam_logs[0].title).to eq('Spam Title')
       end
     end
+
+    context 'user agent details are saved' do
+      before do
+        request.env['action_dispatch.remote_ip'] = '127.0.0.1'
+      end
+
+      def post_new_issue
+        sign_in(user)
+        project = create(:empty_project, :public)
+        post :create, {
+          namespace_id: project.namespace.to_param,
+          project_id: project.to_param,
+          issue: { title: 'Title', description: 'Description' }
+        }
+      end
+
+      it 'creates a user agent detail' do
+        expect{ post_new_issue }.to change(UserAgentDetail, :count).by(1)
+      end
+    end
+  end
+
+  describe 'POST #mark_as_spam' do
+    context 'properly submits to Akismet' do
+      before do
+        allow_any_instance_of(AkismetService).to receive_messages(submit_spam: true)
+        allow_any_instance_of(ApplicationSetting).to receive_messages(akismet_enabled: true)
+      end
+
+      def post_spam
+        admin = create(:admin)
+        create(:user_agent_detail, subject: issue)
+        project.team << [admin, :master]
+        sign_in(admin)
+        post :mark_as_spam, {
+          namespace_id: project.namespace.path,
+          project_id: project.path,
+          id: issue.iid
+        }
+      end
+
+      it 'updates issue' do
+        post_spam
+        expect(issue.submittable_as_spam?).to be_falsey
+      end
+    end
   end
 
   describe "DELETE #destroy" do
diff --git a/spec/factories/user_agent_details.rb b/spec/factories/user_agent_details.rb
new file mode 100644
index 00000000000..9763cc0cf15
--- /dev/null
+++ b/spec/factories/user_agent_details.rb
@@ -0,0 +1,7 @@
+FactoryGirl.define do
+  factory :user_agent_detail do
+    ip_address '127.0.0.1'
+    user_agent 'AppleWebKit/537.36'
+    association :subject, factory: :issue
+  end
+end
diff --git a/spec/features/merge_requests/diff_notes_spec.rb b/spec/features/merge_requests/diff_notes_spec.rb
new file mode 100644
index 00000000000..12e89742b79
--- /dev/null
+++ b/spec/features/merge_requests/diff_notes_spec.rb
@@ -0,0 +1,159 @@
+require 'spec_helper'
+
+feature 'Diff notes', js: true, feature: true do
+  include WaitForAjax
+
+  before do
+    login_as :admin
+    @merge_request = create(:merge_request)
+    @project = @merge_request.source_project
+  end
+
+  context 'merge request diffs' do
+    let(:comment_button_class) { '.add-diff-note' }
+    let(:notes_holder_input_class) { 'js-temp-notes-holder' }
+    let(:notes_holder_input_xpath) { './following-sibling::*[contains(concat(" ", @class, " "), " notes_holder ")]' }
+    let(:test_note_comment) { 'this is a test note!' }
+
+    context 'when hovering over the parallel view diff file' do
+      before(:each) do
+        visit diffs_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)
+        click_link 'Side-by-side'
+      end
+
+      context 'with an old line on the left and no line on the right' do
+        it 'should allow commenting on the left side' do
+          should_allow_commenting(find('[id="6eb14e00385d2fb284765eb1cd8d420d33d63fc9_23_22"]').find(:xpath, '..'), 'left')
+        end
+
+        it 'should not allow commenting on the right side' do
+          should_not_allow_commenting(find('[id="6eb14e00385d2fb284765eb1cd8d420d33d63fc9_23_22"]').find(:xpath, '..'), 'right')
+        end
+      end
+
+      context 'with no line on the left and a new line on the right' do
+        it 'should not allow commenting on the left side' do
+          should_not_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_15_15"]').find(:xpath, '..'), 'left')
+        end
+
+        it 'should allow commenting on the right side' do
+          should_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_15_15"]').find(:xpath, '..'), 'right')
+        end
+      end
+
+      context 'with an old line on the left and a new line on the right' do
+        it 'should allow commenting on the left side' do
+          should_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_9_9"]').find(:xpath, '..'), 'left')
+        end
+
+        it 'should allow commenting on the right side' do
+          should_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_9_9"]').find(:xpath, '..'), 'right')
+        end
+      end
+
+      context 'with an unchanged line on the left and an unchanged line on the right' do
+        it 'should allow commenting on the left side' do
+          should_allow_commenting(first('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_7_7"]').find(:xpath, '..'), 'left')
+        end
+
+        it 'should allow commenting on the right side' do
+          should_allow_commenting(first('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_7_7"]').find(:xpath, '..'), 'right')
+        end
+      end
+
+      context 'with a match line' do
+        it 'should not allow commenting on the left side' do
+          should_not_allow_commenting(first('.match').find(:xpath, '..'), 'left')
+        end
+
+        it 'should not allow commenting on the right side' do
+          should_not_allow_commenting(first('.match').find(:xpath, '..'), 'right')
+        end
+      end
+    end
+
+    context 'when hovering over the inline view diff file' do
+      before do
+        visit diffs_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)
+        click_link 'Inline'
+      end
+
+      context 'with a new line' do
+        it 'should allow commenting' do
+          should_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_10_9"]'))
+        end
+      end
+
+      context 'with an old line' do
+        it 'should allow commenting' do
+          should_allow_commenting(find('[id="6eb14e00385d2fb284765eb1cd8d420d33d63fc9_22_22"]'))
+        end
+      end
+
+      context 'with an unchanged line' do
+        it 'should allow commenting' do
+          should_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_7_7"]'))
+        end
+      end
+
+      context 'with a match line' do
+        it 'should not allow commenting' do
+          should_not_allow_commenting(first('.match'))
+        end
+      end
+    end
+
+    def should_allow_commenting(line_holder, diff_side = nil)
+      line = get_line_components(line_holder, diff_side)
+      line[:content].hover
+      expect(line[:num]).to have_css comment_button_class
+
+      comment_on_line(line_holder, line)
+      wait_for_ajax
+
+      assert_comment_persistence(line_holder)
+    end
+
+    def should_not_allow_commenting(line_holder, diff_side = nil)
+      line = get_line_components(line_holder, diff_side)
+      line[:content].hover
+      expect(line[:num]).not_to have_css comment_button_class
+    end
+
+    def get_line_components(line_holder, diff_side = nil)
+      if diff_side.nil?
+        get_inline_line_components(line_holder)
+      else
+        get_parallel_line_components(line_holder, diff_side)
+      end
+    end
+
+    def get_inline_line_components(line_holder)
+      { content: line_holder.first('.line_content'), num: line_holder.first('.diff-line-num') }
+    end
+
+    def get_parallel_line_components(line_holder, diff_side = nil)
+      side_index = diff_side == 'left' ? 0 : 1
+      { content: line_holder.all('.line_content')[side_index], num: line_holder.all('.diff-line-num')[side_index] }
+    end
+
+    def comment_on_line(line_holder, line)
+      line[:num].find(comment_button_class).trigger 'click'
+      expect(line_holder).to have_xpath notes_holder_input_xpath
+
+      notes_holder_input = line_holder.find(:xpath, notes_holder_input_xpath)
+      expect(notes_holder_input[:class]).to include(notes_holder_input_class)
+
+      notes_holder_input.fill_in 'note[note]', with: test_note_comment
+      click_button 'Comment'
+    end
+
+    def assert_comment_persistence(line_holder)
+      expect(line_holder).to have_xpath notes_holder_input_xpath
+
+      notes_holder_saved = line_holder.find(:xpath, notes_holder_input_xpath)
+      expect(notes_holder_saved[:class]).not_to include(notes_holder_input_class)
+      expect(notes_holder_saved).to have_content test_note_comment
+    end
+  end
+end
diff --git a/spec/features/projects/files/editing_a_file_spec.rb b/spec/features/projects/files/editing_a_file_spec.rb
new file mode 100644
index 00000000000..fe047e00409
--- /dev/null
+++ b/spec/features/projects/files/editing_a_file_spec.rb
@@ -0,0 +1,34 @@
+require 'spec_helper'
+
+feature 'User wants to edit a file', feature: true do
+  include WaitForAjax
+
+  let(:project) { create(:project) }
+  let(:user) { create(:user) }
+  let(:commit_params) do
+    {
+      source_branch: project.default_branch,
+      target_branch: project.default_branch,
+      commit_message: "Committing First Update",
+      file_path: ".gitignore",
+      file_content: "First Update",
+      last_commit_sha: Gitlab::Git::Commit.last_for_path(project.repository, project.default_branch,
+                                                         ".gitignore").sha
+    }
+  end
+
+  background do
+    project.team << [user, :master]
+    login_as user
+    visit namespace_project_edit_blob_path(project.namespace, project,
+                                           File.join(project.default_branch, '.gitignore'))
+  end
+
+  scenario 'file has been updated since the user opened the edit page' do
+    Files::UpdateService.new(project, user, commit_params).execute
+
+    click_button 'Commit Changes'
+
+    expect(page).to have_content 'Someone edited the file the same time you did.'
+  end
+end
diff --git a/spec/lib/gitlab/akismet_helper_spec.rb b/spec/lib/gitlab/akismet_helper_spec.rb
deleted file mode 100644
index b08396da4d2..00000000000
--- a/spec/lib/gitlab/akismet_helper_spec.rb
+++ /dev/null
@@ -1,35 +0,0 @@
-require 'spec_helper'
-
-describe Gitlab::AkismetHelper, type: :helper do
-  let(:project) { create(:project, :public) }
-  let(:user) { create(:user) }
-
-  before do
-    allow(Gitlab.config.gitlab).to receive(:url).and_return(Settings.send(:build_gitlab_url))
-    allow_any_instance_of(ApplicationSetting).to receive(:akismet_enabled).and_return(true)
-    allow_any_instance_of(ApplicationSetting).to receive(:akismet_api_key).and_return('12345')
-  end
-
-  describe '#check_for_spam?' do
-    it 'returns true for public project' do
-      expect(helper.check_for_spam?(project)).to eq(true)
-    end
-
-    it 'returns false for private project' do
-      project.update_attribute(:visibility_level, Gitlab::VisibilityLevel::PRIVATE)
-      expect(helper.check_for_spam?(project)).to eq(false)
-    end
-  end
-
-  describe '#is_spam?' do
-    it 'returns true for spam' do
-      environment = {
-        'action_dispatch.remote_ip' => '127.0.0.1',
-        'HTTP_USER_AGENT' => 'Test User Agent'
-      }
-
-      allow_any_instance_of(::Akismet::Client).to receive(:check).and_return([true, true])
-      expect(helper.is_spam?(environment, user, 'Is this spam?')).to eq(true)
-    end
-  end
-end
diff --git a/spec/models/concerns/spammable_spec.rb b/spec/models/concerns/spammable_spec.rb
new file mode 100644
index 00000000000..32935bc0b09
--- /dev/null
+++ b/spec/models/concerns/spammable_spec.rb
@@ -0,0 +1,33 @@
+require 'spec_helper'
+
+describe Issue, 'Spammable' do
+  let(:issue) { create(:issue, description: 'Test Desc.') }
+
+  describe 'Associations' do
+    it { is_expected.to have_one(:user_agent_detail).dependent(:destroy) }
+  end
+
+  describe 'ClassMethods' do
+    it 'should return correct attr_spammable' do
+      expect(issue.spammable_text).to eq("#{issue.title}\n#{issue.description}")
+    end
+  end
+
+  describe 'InstanceMethods' do
+    it 'should be invalid if spam' do
+      issue = build(:issue, spam: true)
+      expect(issue.valid?).to be_falsey
+    end
+
+    describe '#check_for_spam?' do
+      it 'returns true for public project' do
+        issue.project.update_attribute(:visibility_level, Gitlab::VisibilityLevel::PUBLIC)
+        expect(issue.check_for_spam?).to eq(true)
+      end
+
+      it 'returns false for other visibility levels' do
+        expect(issue.check_for_spam?).to eq(false)
+      end
+    end
+  end
+end
diff --git a/spec/models/project_services/irker_service_spec.rb b/spec/models/project_services/irker_service_spec.rb
index b528baaf15c..ea718232255 100644
--- a/spec/models/project_services/irker_service_spec.rb
+++ b/spec/models/project_services/irker_service_spec.rb
@@ -52,19 +52,20 @@ describe IrkerService, models: true do
     let(:colorize_messages) { '1' }
 
     before do
+      @irker_server = TCPServer.new 'localhost', 0
+
       allow(irker).to receive_messages(
         active: true,
         project: project,
         project_id: project.id,
         service_hook: true,
-        server_host: 'localhost',
-        server_port: 6659,
+        server_host: @irker_server.addr[2],
+        server_port: @irker_server.addr[1],
         default_irc_uri: 'irc://chat.freenode.net/',
         recipients: recipients,
         colorize_messages: colorize_messages)
 
       irker.valid?
-      @irker_server = TCPServer.new 'localhost', 6659
     end
 
     after do
diff --git a/spec/models/user_agent_detail_spec.rb b/spec/models/user_agent_detail_spec.rb
new file mode 100644
index 00000000000..a8c25766e73
--- /dev/null
+++ b/spec/models/user_agent_detail_spec.rb
@@ -0,0 +1,31 @@
+require 'rails_helper'
+
+describe UserAgentDetail, type: :model do
+  describe '.submittable?' do
+    it 'is submittable when not already submitted' do
+      detail = build(:user_agent_detail)
+
+      expect(detail.submittable?).to be_truthy
+    end
+
+    it 'is not submittable when already submitted' do
+      detail = build(:user_agent_detail, submitted: true)
+
+      expect(detail.submittable?).to be_falsey
+    end
+  end
+
+  describe '.valid?' do
+    it 'is valid with a subject' do
+      detail = build(:user_agent_detail)
+
+      expect(detail).to be_valid
+    end
+
+    it 'is invalid without a subject' do
+      detail = build(:user_agent_detail, subject: nil)
+
+      expect(detail).not_to be_valid
+    end
+  end
+end
diff --git a/spec/requests/api/issues_spec.rb b/spec/requests/api/issues_spec.rb
index 3cd4e981fb2..a40e1a93b71 100644
--- a/spec/requests/api/issues_spec.rb
+++ b/spec/requests/api/issues_spec.rb
@@ -531,8 +531,8 @@ describe API::API, api: true  do
 
   describe 'POST /projects/:id/issues with spam filtering' do
     before do
-      allow_any_instance_of(Gitlab::AkismetHelper).to receive(:check_for_spam?).and_return(true)
-      allow_any_instance_of(Gitlab::AkismetHelper).to receive(:is_spam?).and_return(true)
+      allow_any_instance_of(SpamService).to receive(:check_for_spam?).and_return(true)
+      allow_any_instance_of(AkismetService).to receive_messages(is_spam?: true)
     end
 
     let(:params) do
@@ -554,7 +554,6 @@ describe API::API, api: true  do
       expect(spam_logs[0].description).to eq('content here')
       expect(spam_logs[0].user).to eq(user)
       expect(spam_logs[0].noteable_type).to eq('Issue')
-      expect(spam_logs[0].project_id).to eq(project.id)
     end
   end
 
diff --git a/spec/services/files/update_service_spec.rb b/spec/services/files/update_service_spec.rb
new file mode 100644
index 00000000000..d019e50649f
--- /dev/null
+++ b/spec/services/files/update_service_spec.rb
@@ -0,0 +1,84 @@
+require "spec_helper"
+
+describe Files::UpdateService do
+  subject { described_class.new(project, user, commit_params) }
+
+  let(:project) { create(:project) }
+  let(:user) { create(:user) }
+  let(:file_path) { 'files/ruby/popen.rb' }
+  let(:new_contents) { "New Content" }
+  let(:commit_params) do
+    {
+      file_path: file_path,
+      commit_message: "Update File",
+      file_content: new_contents,
+      file_content_encoding: "text",
+      last_commit_sha: last_commit_sha,
+      source_project: project,
+      source_branch: project.default_branch,
+      target_branch: project.default_branch,
+    }
+  end
+
+  before do
+    project.team << [user, :master]
+  end
+
+  describe "#execute" do
+    context "when the file's last commit sha does not match the supplied last_commit_sha" do
+      let(:last_commit_sha) { "foo" }
+
+      it "returns a hash with the correct error message and a :error status " do
+        expect { subject.execute }.
+          to raise_error(Files::UpdateService::FileChangedError,
+                         "You are attempting to update a file that has changed since you started editing it.")
+      end
+    end
+
+    context "when the file's last commit sha does match the supplied last_commit_sha" do
+      let(:last_commit_sha) { Gitlab::Git::Commit.last_for_path(project.repository, project.default_branch, file_path).sha }
+
+      it "returns a hash with the :success status " do
+        results = subject.execute
+
+        expect(results).to match({ status: :success })
+      end
+
+      it "updates the file with the new contents" do
+        subject.execute
+
+        results = project.repository.blob_at_branch(project.default_branch, file_path)
+
+        expect(results.data).to eq(new_contents)
+      end
+    end
+
+    context "when the last_commit_sha is not supplied" do
+      let(:commit_params) do
+        {
+          file_path: file_path,
+          commit_message: "Update File",
+          file_content: new_contents,
+          file_content_encoding: "text",
+          source_project: project,
+          source_branch: project.default_branch,
+          target_branch: project.default_branch,
+        }
+      end
+
+      it "returns a hash with the :success status " do
+        results = subject.execute
+
+        expect(results).to match({ status: :success })
+      end
+
+      it "updates the file with the new contents" do
+        subject.execute
+
+        results = project.repository.blob_at_branch(project.default_branch, file_path)
+
+        expect(results.data).to eq(new_contents)
+      end
+    end
+  end
+end