1 files changed, 14 insertions, 0 deletions
diff --git a/app/models/milestone.rb b/app/models/milestone.rb
index 9c4476c768e..cbe65d70997 100644
--- a/app/models/milestone.rb
+++ b/app/models/milestone.rb
@@ -27,6 +27,7 @@ class Milestone < ActiveRecord::Base
 
   belongs_to :project
   has_many :issues
+  has_many :labels, through: :issues
   has_many :merge_requests
   has_many :participants, through: :issues, source: :assignee
 
@@ -109,6 +110,19 @@ class Milestone < ActiveRecord::Base
     0
   end
 
+  # Returns the elapsed time (in percent) since the Milestone creation date until today.
+  # If the Milestone doesn't have a due_date then returns 0 since we can't calculate the elapsed time.
+  # If the Milestone is overdue then it returns 100%.
+  def percent_time_used
+    return 0 unless due_date
+    return 100 if expired?
+
+    duration = ((created_at - due_date.to_datetime) / 1.day)
+    days_elapsed = ((created_at - Time.now) / 1.day)
+
+    ((days_elapsed.to_f / duration) * 100).floor
+  end
+
   def expires_at
     if due_date
       if due_date.past?