Add FinancialLinks

For now this is only usefull for plugins, since there is no UI.

app/controllers/finance/financial_links_controller.rb

@@ -0,0 +1,27 @@
+class Finance::FinancialLinksController < Finance::BaseController
+
+  def show
+    @financial_link = FinancialLink.find(params[:id])
+
+    @items = @financial_link.financial_transactions.map do |ft|
+      {
+        date: ft.created_on,
+        type: t('activerecord.models.financial_transaction'),
+        description: "#{ft.ordergroup.name}: #{ft.note}",
+        amount: ft.amount,
+        link_to: finance_ordergroup_transactions_path(ft.ordergroup)
+      }
+    end
+    @items += @financial_link.invoices.map do |invoice|
+      {
+        date: invoice.date || invoice.created_at,
+        type: t('activerecord.models.invoice'),
+        description: "#{invoice.supplier.name}: #{invoice.number}",
+        amount: invoice.amount,
+        link_to: finance_invoice_path(invoice)
+      }
+    end
+    @items.sort_by! { |item| item[:date] }
+  end
+
+end