Add wiki page diff url to Slack notification message

In this commit, we add the wiki page diff url to the
notification message sent to Slack.

Changelog: added

app/models/integrations/chat_message/wiki_page_message.rb

@@ -7,6 +7,7 @@ module Integrations
       attr_reader :wiki_page_url
       attr_reader :action
       attr_reader :description
+      attr_reader :diff_url
 
       def initialize(params)
         super
@@ -16,6 +17,7 @@ module Integrations
         @title = obj_attr[:title]
         @wiki_page_url = obj_attr[:url]
         @description = obj_attr[:message]
+        @diff_url = obj_attr[:diff_url]
 
         @action =
           case obj_attr[:action]
@@ -44,19 +46,23 @@ module Integrations
       private
 
       def message
-        "#{user_combined_name} #{action} #{wiki_page_link} in #{project_link}: *#{title}*"
+        "#{user_combined_name} #{action} #{wiki_page_link} (#{diff_link}) in #{project_link}: *#{title}*"
       end
 
       def description_message
         [{ text: format(@description), color: attachment_color }]
       end
 
+      def diff_link
+        link('Compare changes', diff_url)
+      end
+
       def project_link
-        "[#{project_name}](#{project_url})"
+        link(project_name, project_url)
       end
 
       def wiki_page_link
-        "[wiki page](#{wiki_page_url})"
+        link('wiki page', wiki_page_url)
       end
     end
   end

lib/gitlab/data_builder/wiki_page.rb

@@ -18,7 +18,8 @@ module Gitlab
           wiki: wiki.hook_attrs,
           object_attributes: wiki_page.hook_attrs.merge(
             url: Gitlab::UrlBuilder.build(wiki_page),
-            action: action
+            action: action,
+            diff_url: Gitlab::UrlBuilder.build(wiki_page, action: :diff, version_id: wiki_page.version.id)
           )
         }
       end

spec/lib/gitlab/data_builder/wiki_page_spec.rb

@@ -4,8 +4,8 @@ require 'spec_helper'
 
 RSpec.describe Gitlab::DataBuilder::WikiPage do
   let_it_be(:project) { create(:project, :repository, :wiki_repo) }
-  let(:wiki_page) { create(:wiki_page, wiki: project.wiki) }
-  let(:user) { create(:user) }
+  let_it_be(:wiki_page) { create(:wiki_page, wiki: project.wiki) }
+  let_it_be(:user) { create(:user) }
 
   describe '.build' do
     let(:data) { described_class.build(wiki_page, user, 'create') }
@@ -19,5 +19,6 @@ RSpec.describe Gitlab::DataBuilder::WikiPage do
     it { expect(data[:object_attributes]).to include(wiki_page.hook_attrs) }
     it { expect(data[:object_attributes]).to include(url: Gitlab::UrlBuilder.build(wiki_page)) }
     it { expect(data[:object_attributes]).to include(action: 'create') }
+    it { expect(data[:object_attributes]).to include(diff_url: Gitlab::UrlBuilder.build(wiki_page, action: :diff, version_id: wiki_page.version.id)) }
   end
 end

spec/models/integrations/chat_message/wiki_page_message_spec.rb

@@ -5,20 +5,30 @@ require 'spec_helper'
 RSpec.describe Integrations::ChatMessage::WikiPageMessage do
   subject { described_class.new(args) }
 
+  let(:name) { 'Test User' }
+  let(:username) { 'test.user' }
+  let(:avatar_url) { 'http://someavatar.com' }
+  let(:project_name) { 'project_name' }
+  let(:project_url) {'http://somewhere.com' }
+  let(:url) { 'http://url.com' }
+  let(:diff_url) { 'http://url.com/diff?version_id=1234' }
+  let(:wiki_page_title) { 'Wiki page title' }
+  let(:commit_message) { 'Wiki page commit message' }
   let(:args) do
     {
       user: {
-        name: 'Test User',
-        username: 'test.user',
-        avatar_url: 'http://someavatar.com'
+        name: name,
+        username: username,
+        avatar_url: avatar_url
       },
-      project_name: 'project_name',
-      project_url: 'http://somewhere.com',
+      project_name: project_name,
+      project_url: project_url,
       object_attributes: {
-        title: 'Wiki page title',
-        url: 'http://url.com',
+        title: wiki_page_title,
+        url: url,
         content: 'Wiki page content',
-        message: 'Wiki page commit message'
+        message: commit_message,
+        diff_url: diff_url
       }
     }
   end
@@ -32,8 +42,8 @@ RSpec.describe Integrations::ChatMessage::WikiPageMessage do
 
         it 'returns a message that a new wiki page was created' do
           expect(subject.pretext).to eq(
-            'Test User (test.user) created <http://url.com|wiki page> in <http://somewhere.com|project_name>: '\
-              '*Wiki page title*')
+            "#{name} (#{username}) created <#{url}|wiki page> (<#{diff_url}|Compare changes>) in <#{project_url}|#{project_name}>: "\
+              "*#{wiki_page_title}*")
         end
       end
 
@@ -44,8 +54,8 @@ RSpec.describe Integrations::ChatMessage::WikiPageMessage do
 
         it 'returns a message that a wiki page was updated' do
           expect(subject.pretext).to eq(
-            'Test User (test.user) edited <http://url.com|wiki page> in <http://somewhere.com|project_name>: '\
-              '*Wiki page title*')
+            "#{name} (#{username}) edited <#{url}|wiki page> (<#{diff_url}|Compare changes>) in <#{project_url}|#{project_name}>: "\
+              "*#{wiki_page_title}*")
         end
       end
     end
@@ -61,7 +71,7 @@ RSpec.describe Integrations::ChatMessage::WikiPageMessage do
         it 'returns the commit message for a new wiki page' do
           expect(subject.attachments).to eq([
             {
-              text: "Wiki page commit message",
+              text: commit_message,
               color: color
             }
           ])
@@ -76,7 +86,7 @@ RSpec.describe Integrations::ChatMessage::WikiPageMessage do
         it 'returns the commit message for an updated wiki page' do
           expect(subject.attachments).to eq([
             {
-              text: "Wiki page commit message",
+              text: commit_message,
               color: color
             }
           ])
@@ -98,7 +108,7 @@ RSpec.describe Integrations::ChatMessage::WikiPageMessage do
 
         it 'returns a message that a new wiki page was created' do
           expect(subject.pretext).to eq(
-            'Test User (test.user) created [wiki page](http://url.com) in [project_name](http://somewhere.com): *Wiki page title*')
+            "#{name} (#{username}) created [wiki page](#{url}) ([Compare changes](#{diff_url})) in [#{project_name}](#{project_url}): *#{wiki_page_title}*")
         end
       end
 
@@ -109,7 +119,7 @@ RSpec.describe Integrations::ChatMessage::WikiPageMessage do
 
         it 'returns a message that a wiki page was updated' do
           expect(subject.pretext).to eq(
-            'Test User (test.user) edited [wiki page](http://url.com) in [project_name](http://somewhere.com): *Wiki page title*')
+            "#{name} (#{username}) edited [wiki page](#{url}) ([Compare changes](#{diff_url})) in [#{project_name}](#{project_url}): *#{wiki_page_title}*")
         end
       end
     end
@@ -121,7 +131,7 @@ RSpec.describe Integrations::ChatMessage::WikiPageMessage do
         end
 
         it 'returns the commit message for a new wiki page' do
-          expect(subject.attachments).to eq('Wiki page commit message')
+          expect(subject.attachments).to eq(commit_message)
         end
       end
 
@@ -131,7 +141,7 @@ RSpec.describe Integrations::ChatMessage::WikiPageMessage do
         end
 
         it 'returns the commit message for an updated wiki page' do
-          expect(subject.attachments).to eq('Wiki page commit message')
+          expect(subject.attachments).to eq(commit_message)
         end
       end
     end