Add "declare credit" UI for receiving batch rows

tailbone/templates/receiving/declare_credit.mako

@@ -0,0 +1,49 @@
+## -*- coding: utf-8; -*-
+<%inherit file="/base.mako" />
+
+<%def name="title()">Declare Credit for Row #${row.sequence}</%def>
+
+<%def name="context_menu_items()">
+  % if master.rows_viewable and request.has_perm('{}.view'.format(permission_prefix)):
+      <li>${h.link_to("View this {}".format(row_model_title), row_action_url('view', row))}</li>
+  % endif
+</%def>
+
+<%def name="extra_javascript()">
+  ${parent.extra_javascript()}
+  <script type="text/javascript">
+
+    function toggleFields(creditType) {
+        if (creditType === undefined) {
+            creditType = $('select[name="credit_type"]').val();
+        }
+        if (creditType == 'expired') {
+            $('.field-wrapper.expiration_date').show();
+        } else {
+            $('.field-wrapper.expiration_date').hide();
+        }
+    }
+
+    $(function() {
+
+        toggleFields();
+
+        $('select[name="credit_type"]').on('selectmenuchange', function(event, ui) {
+            toggleFields(ui.item.value);
+        });
+
+    });
+  </script>
+</%def>
+
+<div style="display: flex; justify-content: space-between;">
+
+  <div class="form-wrapper">
+    ${form.render()|n}
+  </div><!-- form-wrapper -->
+
+  <ul id="context-menu">
+    ${self.context_menu_items()}
+  </ul>
+
+</div>

tailbone/templates/receiving/view_row.mako

@@ -7,7 +7,10 @@
       <div class="object-helper">
         <h3>Receiving Tools</h3>
         <div class="object-helper-content">
+          <div style="white-space: nowrap;">
             ${h.link_to("Receive Product", url('{}.receive_row'.format(route_prefix), uuid=batch.uuid, row_uuid=row.uuid), class_='button autodisable')}
+            ${h.link_to("Declare Credit", url('{}.declare_credit'.format(route_prefix), uuid=batch.uuid, row_uuid=row.uuid), class_='button autodisable')}
+          </div>
         </div>
       </div>
   % endif

tailbone/views/purchasing/receiving.py

@@ -953,6 +953,54 @@ class ReceivingBatchView(PurchasingBatchView):
         context['parent_title'] = self.get_instance_title(batch)
         return self.render_to_response('receive_row', context, mobile=mobile)
 
+    def declare_credit(self):
+        """
+        View for declaring a credit, i.e. converting some "received" or similar
+        quantity, to a credit of some sort.
+        """
+        row = self.get_row_instance()
+        batch = row.batch
+        possible_credit_types = [
+            'damaged',
+            'expired',
+        ]
+        context = {
+            'row': row,
+            'batch': batch,
+            'parent_instance': batch,
+            'instance': row,
+            'instance_title': self.get_row_instance_title(row),
+            'parent_model_title': self.get_model_title(),
+            'product_image_url': self.get_row_image_url(row),
+            'allow_expired': self.handler.allow_expired_credits(),
+            'allow_cases': self.handler.allow_cases(),
+        }
+
+        schema = DeclareCreditForm().bind(session=self.Session())
+        form = forms.Form(schema=schema, request=self.request)
+        form.set_widget('credit_type', forms.widgets.JQuerySelectWidget(
+            values=[(m, m) for m in possible_credit_types]))
+        form.set_widget('quantity', forms.widgets.CasesUnitsWidget(
+            amount_required=True, one_amount_only=True))
+        form.set_type('expiration_date', 'date_jquery')
+
+        if form.validate(newstyle=True):
+
+            # handler takes care of the row receiving logic for us
+            kwargs = dict(form.validated)
+            kwargs['cases'] = kwargs['quantity']['cases']
+            kwargs['units'] = kwargs['quantity']['units']
+            del kwargs['quantity']
+            self.handler.declare_credit(row, **kwargs)
+
+            return self.redirect(self.get_row_action_url('view', row))
+
+        context['form'] = form
+        context['dform'] = form.make_deform_form()
+        context['parent_url'] = self.get_action_url('view', batch)
+        context['parent_title'] = self.get_instance_title(batch)
+        return self.render_to_response('declare_credit', context)
+
     def transform_unit_row(self):
         """
         View which transforms the given row, which is assumed to associate with
@@ -1790,6 +1838,11 @@ class ReceivingBatchView(PurchasingBatchView):
         config.add_view(cls, attr='mobile_receive_row', route_name='mobile.{}.receive_row'.format(route_prefix),
                         permission='{}.edit_row'.format(permission_prefix))
 
+        # declare credit for row
+        config.add_route('{}.declare_credit'.format(route_prefix), '{}/{{uuid}}/rows/{{row_uuid}}/declare-credit'.format(url_prefix))
+        config.add_view(cls, attr='declare_credit', route_name='{}.declare_credit'.format(route_prefix),
+                        permission='{}.edit_row'.format(permission_prefix))
+
         if cls.allow_truck_dump:
 
             # add TD child batch, from invoice file
@@ -1887,6 +1940,22 @@ class ReceiveRowForm(colander.MappingSchema):
     quick_receive = colander.SchemaNode(colander.Boolean())
 
 
+class DeclareCreditForm(colander.MappingSchema):
+
+    credit_type = colander.SchemaNode(colander.String(),
+                                      validator=colander.OneOf([
+                                          'damaged',
+                                          'expired',
+                                          # 'mispick',
+                                      ]))
+
+    quantity = forms.types.ProductQuantity()
+
+    expiration_date = colander.SchemaNode(colander.Date(),
+                                          widget=dfwidget.TextInputWidget(),
+                                          missing=colander.null)
+
+
 class MobileReceivingForm(colander.MappingSchema):
 
     row = colander.SchemaNode(colander.String(),