Override customer search UI

app/assets/javascripts/admin/checkouts/edit_override.js

@@ -0,0 +1,53 @@
+$(document).ready(function() {
+  if ($("#customer_search_override").length > 0) {
+    $("#customer_search_override").select2({
+      placeholder: Spree.translations.choose_a_customer,
+      ajax: {
+        url: '/admin/search/customers.json', // modified
+        datatype: 'json',
+        data: function(term, page) {
+          return { q: term, distributor_id: $('#distributor_id').val() } // modified
+        },
+        results: function(data, page) {
+          return { results: data }
+        }
+      },
+      dropdownCssClass: 'customer_search',
+      formatResult: formatCustomerResult,
+      formatSelection: function (customer) {
+        _.each(['bill_address', 'ship_address'], function(address) {
+          var data = customer[address];
+          address_parts = ['firstname', 'lastname',
+                           'company', 'address1',
+                           'address2', 'city',
+                           'zipcode', 'phone']
+          var attribute_wrapper = '#order_' + address + '_attributes_'
+          if(data != undefined) {
+            _.each(address_parts, function(part) {
+              $(attribute_wrapper + part).val(data[part]);
+            })
+
+            $(attribute_wrapper + 'state_id').select2("val", data['state_id']);
+            $(attribute_wrapper + 'country_id').select2("val", data['country_id']);
+          }
+          else {
+            _.each(address_parts, function(part) {
+              $(attribute_wrapper + part).val("");
+            })
+
+            $(attribute_wrapper + 'state_id').select2("val", '');
+            $(attribute_wrapper + 'country_id').select2("val", '');
+          }
+        });
+
+        $('#order_email').val(customer.email);
+        $('#user_id').val(customer.user_id); // modified
+        $('#guest_checkout_true').prop("checked", false);
+        $('#guest_checkout_false').prop("checked", true);
+        $('#guest_checkout_false').prop("disabled", false);
+
+        return customer.email;
+      }
+    })
+  }
+})

app/overrides/spree/admin/orders/customer_details/edit/replace_customer_search.html.haml.deface

@@ -0,0 +1,5 @@
+/ replace "code[erb-loud]:contains('hidden_field_tag :customer_search')"
+
+= hidden_field_tag :customer_search_override,  nil, :class => 'fullwidth title'
+
+= hidden_field_tag :distributor_id,  @order.distributor_id