Improve how cases/units, uom are handled for mobile receiving

last-used uom should be more or less sticky, etc.

tailbone/static/js/tailbone.mobile.receiving.js

@@ -68,9 +68,11 @@ $(document).on('click', 'form.receiving-update .receiving-actions button', funct
 });
 
 
+// quick-receive (1 CS)
 $(document).on('click', 'form.receiving-update .receive-one-case', function() {
     var form = $(this).parents('form:first');
     form.find('[name="mode"]').val('received');
     form.find('[name="cases"]').val('1');
+    form.find('input[name="quick_receive"]').val('true');
     form.submit();
 });

tailbone/templates/mobile/receiving/view_row.mako

@@ -6,14 +6,6 @@
 
 <%def name="page_title()">${h.link_to("Receiving", url('mobile.receiving'))} &raquo; ${h.link_to(batch.id_str, url('mobile.receiving.view', uuid=batch.uuid))} &raquo; ${row.upc.pretty()}</%def>
 
-<%
-   unit_uom = 'LB' if row.product and row.product.weighed else 'EA'
-
-   uom = 'CS'
-   if row.units_ordered and not row.cases_ordered:
-       uom = 'EA'
-%>
-
 
 <div class="ui-grid-a">
   <div class="ui-block-a">
@@ -102,6 +94,8 @@
       </tbody>
     </table>
 
+    ${h.hidden('quick_receive', value='false')}
+
     ${h.hidden('delete_row', value='false')}
     % if request.has_perm('{}.delete_row'.format(permission_prefix)):
         <button type="button" id="delete-receiving-row">Delete this Row</button>

tailbone/views/purchasing/receiving.py

@@ -109,6 +109,8 @@ class ReceivingBatchView(PurchasingBatchView):
     allow_from_scratch = True
     allow_truck_dump = False
 
+    default_uom_is_case = True
+
     labels = {
         'truck_dump_batch': "Truck Dump Parent",
         'invoice_parser_key': "Invoice Parser",
@@ -704,10 +706,18 @@ class ReceivingBatchView(PurchasingBatchView):
                     existing = getattr(self.handler, 'get_units_{}'.format(mode))(row)
                     proposed = existing + self.handler.get_units(cases, units, row.case_quantity)
                     new_cases, new_units = self.handler.calc_best_fit(proposed, row.case_quantity)
-                    if getattr(row, 'cases_{}'.format(mode)) != new_cases:
+
+                    old_cases = getattr(row, 'cases_{}'.format(mode))
+                    if new_cases and old_cases != new_cases:
                         setattr(row, 'cases_{}'.format(mode), new_cases)
-                    if getattr(row, 'units_{}'.format(mode)) != new_units:
+                    elif old_cases and not new_cases:
+                        setattr(row, 'cases_{}'.format(mode), None)
+
+                    old_units = getattr(row, 'units_{}'.format(mode))
+                    if new_units and old_units != new_units:
                         setattr(row, 'units_{}'.format(mode), new_units)
+                    elif old_units and not new_units:
+                        setattr(row, 'units_{}'.format(mode), None)
 
                     # if mode in ('damaged', 'expired', 'mispick'):
                     if mode in ('damaged', 'expired'):
@@ -722,8 +732,34 @@ class ReceivingBatchView(PurchasingBatchView):
                         batch.invoice_total -= row.invoice_total
                     self.handler.refresh_row(row)
 
+                    # keep track of last-used uom, although we just track
+                    # whether or not it was 'CS' since the unit_uom can vary
+                    sticky_case = None
+                    if not update_form.validated['quick_receive']:
+                        if cases and not units:
+                            sticky_case = True
+                        elif units and not cases:
+                            sticky_case = False
+                    if sticky_case is not None:
+                        self.request.session['tailbone.mobile.receiving.sticky_uom_is_case'] = sticky_case
+
                     return self.redirect(self.get_action_url('view', batch, mobile=True))
 
+        # unit_uom can vary by product
+        context['unit_uom'] = 'LB' if row.product and row.product.weighed else 'EA'
+
+        # effective uom can vary in a few ways...the basic default is 'CS' if
+        # self.default_uom_is_case is true, otherwise whatever unit_uom is.
+        sticky_case = self.request.session.get('tailbone.mobile.receiving.sticky_uom_is_case')
+        if sticky_case is None:
+            context['uom'] = 'CS' if self.default_uom_is_case else context['unit_uom']
+        elif sticky_case:
+            context['uom'] = 'CS'
+        else:
+            context['uom'] = context['unit_uom']
+        if context['uom'] == 'CS' and row.units_ordered and not row.cases_ordered:
+            context['uom'] = context['unit_uom']
+
         if not row.cases_ordered and not row.units_ordered and not batch.truck_dump:
             self.request.session.flash("This item was NOT on the original purchase order.", 'receiving-warning')
         return self.render_to_response('view_row', context, mobile=True)
@@ -849,6 +885,8 @@ class MobileReceivingForm(colander.MappingSchema):
                                           widget=dfwidget.TextInputWidget(),
                                           missing=colander.null)
 
+    quick_receive = colander.SchemaNode(colander.Boolean())
+
     delete_row = colander.SchemaNode(colander.Boolean())