Initial commit

app/api/v2/order_helpers.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+module API
+  module V2
+    module OrderHelpers
+
+      def build_order(attrs)
+        (attrs[:side] == 'sell' ? OrderAsk : OrderBid).new \
+          state:         ::Order::PENDING,
+          member:        current_user,
+          ask:           current_market&.base_unit,
+          bid:           current_market&.quote_unit,
+          market:        current_market,
+          ord_type:      attrs[:ord_type] || 'limit',
+          price:         attrs[:price],
+          volume:        attrs[:volume],
+          origin_volume: attrs[:volume]
+      end
+
+      def create_order(attrs)
+        create_order_errors = {
+          ::Account::AccountError => 'market.account.insufficient_balance',
+          ::Order::InsufficientMarketLiquidity => 'market.order.insufficient_market_liquidity',
+          ActiveRecord::RecordInvalid => 'market.order.invalid_volume_or_price'
+        }
+
+        order = build_order(attrs)
+        order.submit_order
+        order
+        # TODO: Make more specific error message for ActiveRecord::RecordInvalid.
+      rescue StandardError => e
+        if create_order_errors.include?(e.class)
+          report_api_error(e, request)
+        else
+          report_exception(e)
+        end
+
+        message = create_order_errors.fetch(e.class, 'market.order.create_error')
+        error!({ errors: [message] }, 422)
+      end
+
+      def order_param
+        params[:order_by].downcase == 'asc' ? 'id asc' : 'id desc'
+      end
+    end
+  end
+end