Unfold references for group labels when moving issue to another project

1 files changed, 24 insertions, 0 deletions

diff --git a/app/models/project_label.rb b/app/models/project_label.rb
index 1171aa2dbb3..2fc074dc401 100644
--- a/app/models/project_label.rb
+++ b/app/models/project_label.rb
@@ -7,6 +7,30 @@ class ProjectLabel < Label
 
   delegate :group, to: :project, allow_nil: true
 
+  ##
+  # Returns the String necessary to reference this ProjectLabel in Markdown
+  #
+  # format - Symbol format to use (default: :id, optional: :name)
+  #
+  # Examples:
+  #
+  #   ProjectLabel.first.to_reference                # => "~1"
+  #   ProjectLabel.first.to_reference(format: :name) # => "~\"bug\""
+  #   ProjectLabel.first.to_reference(project)       # => "gitlab-org/gitlab-ce~1"
+  #
+  # Returns a String
+  #
+  def to_reference(from_project = nil, format: :id)
+    format_reference = label_format_reference(format)
+    reference = "#{self.class.reference_prefix}#{format_reference}"
+
+    if cross_project_reference?(from_project)
+      project.to_reference + reference
+    else
+      reference
+    end
+  end
+
   private
 
   def title_must_not_exist_at_group_level