API v1 order_articles endpoints

app/controllers/api/v1/order_articles_controller.rb

@@ -0,0 +1,38 @@
+class Api::V1::OrderArticlesController < Api::V1::BaseController
+  include Concerns::CollectionScope
+
+  before_action ->{ doorkeeper_authorize! 'orders:read', 'orders:write' }
+
+  def index
+    render_collection search_scope
+  end
+
+  def show
+    render json: scope.find(params.require(:id))
+  end
+
+  private
+
+  def scope
+    OrderArticle.includes(:article_price, article: :supplier)
+  end
+
+  def search_scope
+    merge_ordered_scope(super, params.fetch(:q, {})[:ordered])
+  end
+
+  def merge_ordered_scope(scope, ordered)
+    if ordered.blank?
+      scope
+    elsif ordered == 'member' && current_ordergroup
+      scope.joins(:group_order_articles).merge(current_ordergroup.group_order_articles)
+    elsif ordered == 'all'
+      table = scope.arel_table
+      scope.where(table[:quantity].gt(0).or(table[:tolerance].gt(0)))
+    elsif ordered == 'supplier'
+      scope.ordered
+    else
+      scope.none # as a hint that it's an invalid value
+    end
+  end
+end