Add service to list issues for a board list

1 files changed, 73 insertions, 0 deletions

diff --git a/app/services/boards/issues/list_service.rb b/app/services/boards/issues/list_service.rb
new file mode 100644
index 00000000000..4948ab3a140
--- /dev/null
+++ b/app/services/boards/issues/list_service.rb
@@ -0,0 +1,73 @@
+module Boards
+  module Issues
+    class ListService
+      def initialize(project, user, params = {})
+        @project = project
+        @user = user
+        @params = params.dup
+      end
+
+      def execute
+        issues = IssuesFinder.new(user, filter_params).execute
+        issues = without_board_labels(issues) if list.backlog?
+        issues
+      end
+
+      private
+
+      attr_reader :project, :user, :params
+
+      delegate :board, to: :project
+
+      def list
+        @list ||= board.lists.find(params[:list_id])
+      end
+
+      def filter_params
+        set_default_scope
+        set_default_sort
+        set_list_label
+        set_project
+        set_state
+
+        params
+      end
+
+      def set_default_scope
+        params[:scope] = 'all'
+      end
+
+      def set_default_sort
+        params[:sort] = 'priority'
+      end
+
+      def set_list_label
+        return unless list.label?
+
+        params[:label_name] ||= []
+        params[:label_name] << list.label_name
+      end
+
+      def set_project
+        params[:project_id] = project.id
+      end
+
+      def set_state
+        params[:state] = list.done? ? 'closed' : 'opened'
+      end
+
+      def board_label_ids
+        @board_label_ids ||= board.lists.label.pluck(:label_id)
+      end
+
+      def without_board_labels(issues)
+        return issues unless board_label_ids.any?
+
+        issues.where.not(
+          LabelLink.where("label_links.target_type = 'Issue' AND label_links.target_id = issues.id")
+                   .where(label_id: board_label_ids).limit(1).arel.exists
+        )
+      end
+    end
+  end
+end