Merge branch 'todo-issue-due-date' into 'master'

Todo issue due date

## What does this MR do?

Adds the text 'Due today' or 'Due [DATE]' next to issues in todos.
This does not add anyway to filter by due date - little steps.

## What are the relevant issue numbers?

#18218

See merge request !6351

CHANGELOG

@@ -146,6 +146,7 @@ v 8.12.0
   - Increase ci_builds artifacts_size column to 8-byte integer to allow larger files
   - Add textarea autoresize after comment (ClemMakesApps)
   - Do not write SSH public key 'comments' to authorized_keys !6381
+  - Add due date to issue todos
   - Refresh todos count cache when an Issue/MR is deleted
   - Fix branches page dropdown sort alignment (ClemMakesApps)
   - Hides merge request button on branches page is user doesn't have permissions

app/helpers/todos_helper.rb

@@ -114,6 +114,26 @@ module TodosHelper
     selected_type ? selected_type[:text] : default_type
   end
 
+  def todo_due_date(todo)
+    return unless todo.target.try(:due_date)
+
+    is_due_today = todo.target.due_date.today?
+    is_overdue = todo.target.overdue?
+    css_class =
+      if is_due_today
+        'text-warning'
+      elsif is_overdue
+        'text-danger'
+      else
+        ''
+      end
+
+    html = "· ".html_safe
+    html << content_tag(:span, class: css_class) do
+      "Due #{is_due_today ? "today" : todo.target.due_date.to_s(:medium)}"
+    end
+  end
+
   private
 
   def show_todo_state?(todo)

app/views/dashboard/todos/_todo.html.haml

@@ -19,6 +19,7 @@
           (removed)
 
       · #{time_ago_with_tooltip(todo.created_at)}
+      = todo_due_date(todo)
 
     .todo-body
       .todo-note

spec/features/todos/todos_spec.rb

@@ -4,7 +4,7 @@ describe 'Dashboard Todos', feature: true do
   let(:user)    { create(:user) }
   let(:author)  { create(:user) }
   let(:project) { create(:project, visibility_level: Gitlab::VisibilityLevel::PUBLIC) }
-  let(:issue)   { create(:issue) }
+  let(:issue)   { create(:issue, due_date: Date.today) }
 
   describe 'GET /dashboard/todos' do
     context 'User does not have todos' do
@@ -28,6 +28,12 @@ describe 'Dashboard Todos', feature: true do
         expect(page).to have_selector('.todos-list .todo', count: 1)
       end
 
+      it 'shows due date as today' do
+        page.within first('.todo') do
+          expect(page).to have_content 'Due today'
+        end
+      end
+
       describe 'deleting the todo' do
         before do
           first('.done-todo').click