Merge branch 'slack-issue-format' into 'master'

Improve issue formatting in Slack service

This will improve the looks of the message that gets send to Slack.

**Before**

![image](https://gitlab.com/jeroenvanbaarsen/gitlab-ce/uploads/670442d4d5cef5aa36753671b8894a75/image.png)

**After**

![image](https://gitlab.com/jeroenvanbaarsen/gitlab-ce/uploads/ab6e40a0c22ebe89ebd5b3652821c6dd/image.png)

There is one thing I'm not certain about, thats sending the logo with the payload. Because this means we need to host the GitLab logo somewhere public, and every time a payload from any GitLab instance is send, we use that logo url. This might overload the server, or drive the bandwidth bill through the roof.
This is something @sytses or @dzaporozhets have to decide about.

@stanhu, you told me you were the author of the original code, maybe you can review?

See merge request !1308

CHANGELOG

@@ -59,6 +59,7 @@ v 8.8.0 (unreleased)
   - Add counter metrics for rails cache
   - Import pull requests from GitHub where the source or target branches were removed
   - All Grape API helpers are now instrumented
+  - Improve Issue formatting for the Slack Service (Jeroen van Baarsen)
 
 v 8.7.6
   - Fix links on wiki pages for relative url setups. !4131 (Artem Sidorenko)
@@ -893,7 +894,7 @@ v 8.1.3
   - Use issue editor as cross reference comment author when issue is edited with a new mention
   - Add Facebook authentication
 
-v 8.1.2
+v 8.1.1
   - Fix cloning Wiki repositories via HTTP (Stan Hu)
   - Add migration to remove satellites directory
   - Fix specific runners visibility

app/models/project_services/slack_service/issue_message.rb

@@ -34,7 +34,12 @@ class SlackService
     private
 
     def message
-      "#{user_name} #{state} #{issue_link} in #{project_link}: *#{title}*"
+      case state
+      when "opened"
+        "[#{project_link}] Issue #{state} by #{user_name}"
+      else
+        "[#{project_link}] Issue #{issue_link} #{state} by #{user_name}"
+      end
     end
 
     def opened_issue?
@@ -42,7 +47,11 @@ class SlackService
     end
 
     def description_message
-      [{ text: format(description), color: attachment_color }]
+      [{
+        title: issue_title,
+        title_link: issue_url,
+        text: format(description),
+        color: "#C95823" }]
     end
 
     def project_link
@@ -50,7 +59,11 @@ class SlackService
     end
 
     def issue_link
-      "[issue ##{issue_iid}](#{issue_url})"
+      "[#{issue_title}](#{issue_url})"
+    end
+
+    def issue_title
+      "##{issue_iid} #{title}"
     end
   end
 end

spec/models/project_services/slack_service/issue_message_spec.rb

@@ -25,7 +25,7 @@ describe SlackService::IssueMessage, models: true do
     }
   end
 
-  let(:color) { '#345' }
+  let(:color) { '#C95823' }
 
   context '#initialize' do
     before do
@@ -40,10 +40,11 @@ describe SlackService::IssueMessage, models: true do
   context 'open' do
     it 'returns a message regarding opening of issues' do
       expect(subject.pretext).to eq(
-        'Test User opened <url|issue #100> in <somewhere.com|project_name>: '\
-        '*Issue title*')
+        '<somewhere.com|[project_name>] Issue opened by Test User')
       expect(subject.attachments).to eq([
         {
+          title: "#100 Issue title",
+          title_link: "url",
           text: "issue description",
           color: color,
         }
@@ -56,10 +57,10 @@ describe SlackService::IssueMessage, models: true do
       args[:object_attributes][:action] = 'close'
       args[:object_attributes][:state] = 'closed'
     end
+
     it 'returns a message regarding closing of issues' do
       expect(subject.pretext). to eq(
-        'Test User closed <url|issue #100> in <somewhere.com|project_name>: '\
-        '*Issue title*')
+        '<somewhere.com|[project_name>] Issue <url|#100 Issue title> closed by Test User')
       expect(subject.attachments).to be_empty
     end
   end