1 files changed, 47 insertions, 0 deletions
diff --git a/app/helpers/issuables_description_templates_helper.rb b/app/helpers/issuables_description_templates_helper.rb
new file mode 100644
index 00000000000..110b3954900
--- /dev/null
+++ b/app/helpers/issuables_description_templates_helper.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+module IssuablesDescriptionTemplatesHelper
+  include Gitlab::Utils::StrongMemoize
+  include GitlabRoutingHelper
+
+  def template_dropdown_tag(issuable, &block)
+    title = selected_template(issuable) || "Choose a template"
+    options = {
+      toggle_class: 'js-issuable-selector',
+      title: title,
+      filter: true,
+      placeholder: 'Filter',
+      footer_content: true,
+      data: {
+        data: issuable_templates(ref_project, issuable.to_ability_name),
+        field_name: 'issuable_template',
+        selected: selected_template(issuable),
+        project_id: ref_project.id
+      }
+    }
+
+    dropdown_tag(title, options: options) do
+      capture(&block)
+    end
+  end
+
+  def issuable_templates(project, issuable_type)
+    @template_types ||= {}
+    @template_types[project.id] ||= {}
+    @template_types[project.id][issuable_type] ||= TemplateFinder.all_template_names_array(project, issuable_type.pluralize)
+  end
+
+  def issuable_templates_names(issuable)
+    issuable_templates(ref_project, issuable.to_ability_name).map { |template| template[:name] }
+  end
+
+  def selected_template(issuable)
+    params[:issuable_template] if issuable_templates(ref_project, issuable.to_ability_name).any? { |template| template[:name] == params[:issuable_template] }
+  end
+
+  def template_names_path(parent, issuable)
+    return '' unless parent.is_a?(Project)
+
+    project_template_names_path(parent, template_type: issuable.to_ability_name)
+  end
+end