1 files changed, 52 insertions, 0 deletions
diff --git a/app/models/concerns/boards/listable.rb b/app/models/concerns/boards/listable.rb
new file mode 100644
index 00000000000..b7c0a8b3489
--- /dev/null
+++ b/app/models/concerns/boards/listable.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+module Boards
+  module Listable
+    extend ActiveSupport::Concern
+
+    included do
+      validates :label, :position, presence: true, if: :label?
+      validates :position, numericality: { only_integer: true, greater_than_or_equal_to: 0 }, if: :movable?
+
+      before_destroy :can_be_destroyed
+
+      scope :ordered, -> { order(:list_type, :position) }
+      scope :destroyable, -> { where(list_type: list_types.slice(*destroyable_types).values) }
+      scope :movable, -> { where(list_type: list_types.slice(*movable_types).values) }
+    end
+
+    class_methods do
+      def destroyable_types
+        [:label]
+      end
+
+      def movable_types
+        [:label]
+      end
+    end
+
+    def destroyable?
+      self.class.destroyable_types.include?(list_type&.to_sym)
+    end
+
+    def movable?
+      self.class.movable_types.include?(list_type&.to_sym)
+    end
+
+    def title
+      if label?
+        label.name
+      elsif backlog?
+        _('Open')
+      else
+        list_type.humanize
+      end
+    end
+
+    private
+
+    def can_be_destroyed
+      throw(:abort) unless destroyable? # rubocop:disable Cop/BanCatchThrow
+    end
+  end
+end