Disallow start date change if campaign has started

r2/r2/controllers/promotecontroller.py

@@ -1039,7 +1039,17 @@ class PromoteApiController(ApiController):
 
         min_start, max_start, max_end = promote.get_date_limits(
             link, c.user_is_sponsor)
-        if start.date() < min_start:
+
+        if campaign_id36:
+            promo_campaign = PromoCampaign._byID36(campaign_id36)
+            if (promote.is_promoted(link) and
+                    promo_campaign.start_date.date() <= min_start and
+                    start != promo_campaign.start_date and
+                    promo_campaign.is_paid):
+                c.errors.add(errors.START_DATE_CANNOT_CHANGE, field='startdate')
+                form.has_errors('startdate', errors.START_DATE_CANNOT_CHANGE)
+                return
+        elif start.date() < min_start:
             c.errors.add(errors.DATE_TOO_EARLY,
                          msg_params={'day': min_start.strftime("%m/%d/%Y")},
                          field='startdate')

r2/r2/lib/errors.py

@@ -100,6 +100,7 @@ error_list = dict((
         ('BAD_DATE_RANGE', _('the dates need to be in order and not identical')),
         ('DATE_TOO_LATE', _('please enter a date %(day)s or earlier')),
         ('DATE_TOO_EARLY', _('please enter a date %(day)s or later')),
+        ('START_DATE_CANNOT_CHANGE', _('start date cannot be changed')),
         ('BAD_ADDRESS', _('address problem: %(message)s')),
         ('BAD_CARD', _('card problem: %(message)s')),
         ('TOO_LONG', _("this is too long (max: %(max_length)s)")),

r2/r2/models/promo.py

@@ -493,6 +493,10 @@ class PromoCampaign(Thing):
         else:
             return g.locations[self.location.country]['name']
 
+    @property
+    def is_paid(self):
+        return self.trans_id != 0 or self.priority == 'house'
+
     def is_freebie(self):
         return self.trans_id < 0
 

r2/r2/templates/promotelinkbase.html

@@ -57,6 +57,7 @@
            value="${value}" id="${name}" class="rounded styled-input" readonly="readonly" size="10" />
     <div id="datepicker-${name}" class="datepicker"></div>
     ${error_field("BAD_DATE", name, "div")}
+    ${error_field("START_DATE_CANNOT_CHANGE", name, "div")}
     ${error_field("DATE_TOO_EARLY", name, "div")}
     ${error_field("DATE_TOO_LATE", name, "div")}
     <script type="text/javascript">