Support Akismet spam checking for creation of issues via API

Currently any spam detected by Akismet by non-members via API will be logged
in a separate table in the admin page.

Closes #5612

4 files changed, 111 insertions, 0 deletions

diff --git a/spec/controllers/admin/spam_logs_controller_spec.rb b/spec/controllers/admin/spam_logs_controller_spec.rb
new file mode 100644
index 00000000000..2486298fc78
--- /dev/null
+++ b/spec/controllers/admin/spam_logs_controller_spec.rb
@@ -0,0 +1,47 @@
+require 'spec_helper'
+
+describe Admin::SpamLogsController do
+  let(:admin)    { create(:admin) }
+  let(:spam_log) { create(:spam_log, user: admin) }
+
+  before do
+    sign_in(admin)
+  end
+
+  describe '#index' do
+    it 'lists all spam logs' do
+      get :index
+      expect(response.status).to eq(200)
+    end
+  end
+
+  describe '#destroy' do
+    it 'destroys just spam log' do
+      user = spam_log.user
+      delete :destroy, id: spam_log.id
+
+      expect(SpamLog.all.count).to eq(0)
+      expect(User.find(user.id)).to be_truthy
+      expect(response.status).to eq(302)
+    end
+
+    it 'destroys user and his spam logs' do
+      user = spam_log.user
+      delete :destroy, id: spam_log.id, remove_user: true
+
+      expect(SpamLog.all.count).to eq(0)
+      expect { User.find(user.id) }.to raise_error(ActiveRecord::RecordNotFound)
+      expect(response.status).to eq(302)
+    end
+
+    it 'destroys user and his spam logs with JSON format' do
+      user = spam_log.user
+      delete :destroy, id: spam_log.id, remove_user: true, format: :json
+
+      expect(SpamLog.all.count).to eq(0)
+      expect { User.find(user.id) }.to raise_error(ActiveRecord::RecordNotFound)
+      expect(JSON.parse(response.body)).to eq({})
+      expect(response.status).to eq(200)
+    end
+  end
+end
diff --git a/spec/factories/spam_logs.rb b/spec/factories/spam_logs.rb
new file mode 100644
index 00000000000..9e8686d73c2
--- /dev/null
+++ b/spec/factories/spam_logs.rb
@@ -0,0 +1,7 @@
+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :spam_log do
+    user
+  end
+end
diff --git a/spec/lib/gitlab/akismet_helper_spec.rb b/spec/lib/gitlab/akismet_helper_spec.rb
new file mode 100644
index 00000000000..9858935180a
--- /dev/null
+++ b/spec/lib/gitlab/akismet_helper_spec.rb
@@ -0,0 +1,35 @@
+require 'spec_helper'
+
+describe Gitlab::AkismetHelper, type: :helper do
+  let(:project) { create(:project) }
+  let(:user) { create(:user) }
+
+  before do
+    allow(Gitlab.config.gitlab).to receive(:url).and_return(Settings.send(:build_gitlab_url))
+    current_application_settings.akismet_enabled = true
+    current_application_settings.akismet_api_key = '12345'
+  end
+
+  describe '#check_for_spam?' do
+    it 'returns true for non-member' do
+      expect(helper.check_for_spam?(project, user)).to eq(true)
+    end
+
+    it 'returns false for member' do
+      project.team << [user, :guest]
+      expect(helper.check_for_spam?(project, user)).to eq(false)
+    end
+  end
+
+  describe '#is_spam?' do
+    it 'returns true for spam' do
+      environment = {
+        'REMOTE_ADDR' => '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/requests/api/issues_spec.rb b/spec/requests/api/issues_spec.rb
index 5e65ad18c0e..2e50344c149 100644
--- a/spec/requests/api/issues_spec.rb
+++ b/spec/requests/api/issues_spec.rb
@@ -241,6 +241,28 @@ describe API::API, api: true  do
     end
   end
 
+  describe 'POST /projects/:id/issues with spam filtering' do
+    before do
+      Grape::Endpoint.before_each do |endpoint|
+        allow(endpoint).to receive(:check_for_spam?).and_return(true)
+        allow(endpoint).to receive(:is_spam?).and_return(true)
+      end
+    end
+
+    it "should create a new project issue" do
+      post api("/projects/#{project.id}/issues", user),
+           title: 'new issue', labels: 'label, label2'
+      expect(response.status).to eq(400)
+      expect(json_response['message']).to eq({ "error" => "Spam detected" })
+      spam_logs = SpamLog.all
+      expect(spam_logs.count).to eq(1)
+      expect(spam_logs[0].title).to eq('new issue')
+      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
+
   describe "PUT /projects/:id/issues/:issue_id to update only title" do
     it "should update a project issue" do
       put api("/projects/#{project.id}/issues/#{issue.id}", user),