Fix event sorting

Re-add `field_event_date` to sort the talks by their most recent event
date in their custom order.

config/sync/core.entity_form_display.node.talk.default.yml

@@ -4,6 +4,7 @@ status: true
 dependencies:
   config:
     - field.field.node.talk.body
+    - field.field.node.talk.field_event_date
     - field.field.node.talk.field_events
     - field.field.node.talk.field_slides
     - field.field.node.talk.field_video
@@ -112,4 +113,5 @@ content:
     region: content
     settings: {  }
     third_party_settings: {  }
-hidden: {  }
+hidden:
+  field_event_date: true

config/sync/core.entity_view_display.node.talk.default.yml

@@ -4,12 +4,14 @@ status: true
 dependencies:
   config:
     - field.field.node.talk.body
+    - field.field.node.talk.field_event_date
     - field.field.node.talk.field_events
     - field.field.node.talk.field_slides
     - field.field.node.talk.field_video
     - node.type.talk
     - views.view.events
   module:
+    - datetime
     - layout_builder
     - layout_discovery
     - speakerdeck_field
@@ -92,6 +94,23 @@ third_party_settings:
               items_per_page: none
             weight: 5
             additional: {  }
+          ccf9bc4e-e750-4762-901a-766292184cd7:
+            uuid: ccf9bc4e-e750-4762-901a-766292184cd7
+            region: content
+            configuration:
+              id: 'field_block:node:talk:field_event_date'
+              label_display: '0'
+              context_mapping:
+                entity: layout_builder.entity
+              formatter:
+                type: datetime_default
+                label: above
+                settings:
+                  timezone_override: ''
+                  format_type: medium
+                third_party_settings: {  }
+            weight: 6
+            additional: {  }
         third_party_settings: {  }
 id: node.talk.default
 targetEntityType: node
@@ -105,6 +124,15 @@ content:
     third_party_settings: {  }
     weight: 101
     region: content
+  field_event_date:
+    type: datetime_default
+    label: above
+    settings:
+      timezone_override: ''
+      format_type: medium
+    third_party_settings: {  }
+    weight: 105
+    region: content
   field_events:
     type: entity_reference_entity_view
     label: above

config/sync/core.entity_view_display.node.talk.teaser.yml

@@ -5,6 +5,7 @@ dependencies:
   config:
     - core.entity_view_mode.node.teaser
     - field.field.node.talk.body
+    - field.field.node.talk.field_event_date
     - field.field.node.talk.field_events
     - field.field.node.talk.field_slides
     - field.field.node.talk.field_video
@@ -26,6 +27,7 @@ content:
     weight: 0
     region: content
 hidden:
+  field_event_date: true
   field_events: true
   field_slides: true
   field_video: true

config/sync/field.field.node.talk.field_event_date.yml

@@ -0,0 +1,21 @@
+uuid: c4294337-cdd3-4279-ba3f-55b135ec2399
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_event_date
+    - node.type.talk
+  module:
+    - datetime
+id: node.talk.field_event_date
+field_name: field_event_date
+entity_type: node
+bundle: talk
+label: 'Event date'
+description: ''
+required: false
+translatable: false
+default_value: {  }
+default_value_callback: ''
+settings: {  }
+field_type: datetime

config/sync/field.storage.node.field_event_date.yml

@@ -0,0 +1,20 @@
+uuid: 9e8d548e-b3a8-455e-b5e3-59eb7c56ca2e
+langcode: en
+status: true
+dependencies:
+  module:
+    - datetime
+    - node
+id: node.field_event_date
+field_name: field_event_date
+entity_type: node
+type: datetime
+settings:
+  datetime_type: date
+module: datetime
+locked: false
+cardinality: 1
+translatable: true
+indexes: {  }
+persist_with_no_fields: false
+custom_storage: false

config/sync/views.view.talks.yml

@@ -8,6 +8,7 @@ dependencies:
     - system.menu.main
   module:
     - node
+    - opdavies_talks
     - user
 id: talks
 label: 'Talks and workshops'
@@ -95,17 +96,15 @@ display:
         options: {  }
       empty: {  }
       sorts:
-        created:
-          id: created
-          table: node_field_data
-          field: created
+        event_sort:
+          id: event_sort
+          table: node__field_events
+          field: event_sort
           relationship: none
           group_type: group
           admin_label: ''
-          entity_type: node
-          entity_field: created
-          plugin_id: date
-          order: DESC
+          plugin_id: event_sort
+          order: ASC
           expose:
             label: ''
             field_identifier: ''

web/modules/custom/talks/src/EventSubscriber/UpdateTalkNodeBeforeSave.php

@@ -36,13 +36,11 @@ final class UpdateTalkNodeBeforeSave implements EventSubscriberInterface {
     $talk = Talk::createFromNode($node);
 
     $this->reorderEvents($talk);
-    $this->updateCreatedDate($talk);
+    $this->updateMostRecentEventDate($talk);
   }
 
   private function reorderEvents(Talk $talk): void {
     $events = $talk->getEvents();
-
-    // If there is only one event, there's no need to sort them.
     if ($events->count() === 1) {
       return;
     };
@@ -62,18 +60,10 @@ final class UpdateTalkNodeBeforeSave implements EventSubscriberInterface {
       ->values();
   }
 
-  private function updateCreatedDate(Talk $talk): void {
-    if (!$eventDate = $talk->findLatestEventDate()) {
-      return;
-    }
+  private function updateMostRecentEventDate(Talk $talk): void {
+    $mostRecentEventDate = $talk->findLatestEventDate();
 
-    $talkDate = Carbon::parse($eventDate)->getTimestamp();
-
-    if ($talkDate == $talk->getCreatedTime()) {
-      return;
-    }
-
-    $talk->setCreatedTime($talkDate);
+    $talk->set('field_event_date', $mostRecentEventDate);
   }
 
 }