Widget: Allow to filter by attributes

doc/user/events/widget.rst

@@ -143,6 +143,11 @@ You can see an example here:
         </div>
     </noscript>
 
+You can filter events by meta data attributes. You can create those attributes in your order profile and set their values in both event and series date
+settings. For example, if you set up a meta data property called "Promoted" that you set to "Yes" on some events, you can pass a filter like this::
+
+   <pretix-widget event="https://pretix.eu/demo/series/" style="list" filter="attr[Promoted]=Yes"></pretix-widget>
+
 pretix Button
 -------------
 

src/pretix/presale/views/widget.py

@@ -365,13 +365,17 @@ class WidgetAPIProductList(EventListMixin, View):
 
             if hasattr(self.request, 'event'):
                 add_subevents_for_days(
-                    self.request.event.subevents_annotated('web'),
+                    filter_qs_by_attr(self.request.event.subevents_annotated('web'), self.request),
                     before, after, ebd, set(), self.request.event,
                     kwargs.get('cart_namespace')
                 )
             else:
                 timezones = set()
-                add_events_for_days(self.request, Event.annotated(self.request.organizer.events, 'web'), before, after, ebd, timezones)
+                add_events_for_days(
+                    self.request,
+                    filter_qs_by_attr(Event.annotated(self.request.organizer.events, 'web'), self.request),
+                    before, after, ebd, timezones
+                )
                 add_subevents_for_days(filter_qs_by_attr(SubEvent.annotated(SubEvent.objects.filter(
                     event__organizer=self.request.organizer,
                     event__is_public=True,
@@ -389,7 +393,7 @@ class WidgetAPIProductList(EventListMixin, View):
         else:
             if hasattr(self.request, 'event'):
                 evs = self.request.event.subevents_sorted(
-                    self.request.event.subevents_annotated(self.request.sales_channel)
+                    filter_qs_by_attr(self.request.event.subevents_annotated(self.request.sales_channel), self.request)
                 )
                 tz = pytz.timezone(request.event.settings.timezone)
                 data['events'] = [

src/pretix/static/pretixpresale/js/widget/widget.js

@@ -1040,6 +1040,9 @@ var shared_root_methods = {
         } else {
             url = this.$root.target_url + 'widget/product_list?lang=' + lang;
         }
+        if (this.$root.filter) {
+            url += '&' + this.$root.filter;
+        }
         var cart_id = getCookie(this.cookieName);
         if (this.$root.voucher_code) {
             url += '&voucher=' + escape(this.$root.voucher_code);
@@ -1212,6 +1215,7 @@ var create_widget = function (element) {
     var skip_ssl = element.attributes["skip-ssl-check"] ? true : false;
     var disable_vouchers = element.attributes["disable-vouchers"] ? true : false;
     var widget_data = JSON.parse(JSON.stringify(window.PretixWidget.widget_data));
+    var filter = element.attributes.filter ? element.attributes.filter.value : null;
     for (var i = 0; i < element.attributes.length; i++) {
         var attrib = element.attributes[i];
         if (attrib.name.match(/^data-.*$/)) {
@@ -1234,6 +1238,7 @@ var create_widget = function (element) {
                 categories: null,
                 currency: null,
                 name: null,
+                filter: filter,
                 voucher_code: voucher,
                 display_net_prices: false,
                 voucher_explanation_text: null,
@@ -1309,6 +1314,7 @@ var create_button = function (element) {
                 voucher_code: voucher,
                 items: items,
                 error: null,
+                filter: null,
                 widget_data: widget_data,
                 widget_id: 'pretix-widget-' + widget_id,
                 button_text: button_text