fix: handle message deletion effects

extensions/messages/js/src/common/models/Dialog.ts

@@ -30,6 +30,9 @@ export default class Dialog extends Model {
   unreadCount() {
     return Model.attribute<number>('unreadCount').call(this);
   }
+  lastMessageId() {
+    return Model.attribute<number>('lastMessageId').call(this);
+  }
   lastReadMessageId() {
     return Model.attribute<number>('lastReadMessageId').call(this);
   }

extensions/messages/js/src/forum/utils/MessageControls.tsx

@@ -59,6 +59,56 @@ const MessageControls = {
 
     return message.delete().then(() => {
       context.attrs.state.remove(message);
+
+      const dialog = message.dialog();
+
+      if (dialog) {
+        const noMessagesLeft =
+          context.attrs.state.getAllItems().filter((m) => {
+            const mDialog = m.dialog();
+
+            if (!mDialog) return false;
+
+            return mDialog?.id() === dialog!.id();
+          }).length === 0;
+
+        if (noMessagesLeft) {
+          app.dialogs.remove(dialog!);
+          m.route.set(app.route('messages'));
+        }
+
+        if (parseInt(message.id()!) === dialog.lastMessageId()) {
+          const lastMessage = context.attrs.state
+            .getAllItems()
+            .filter((m) => {
+              const mDialog = m.dialog();
+
+              if (!mDialog) return false;
+
+              return mDialog.id() === dialog?.id();
+            })
+            .sort((a, b) => parseInt(a.id()!) - parseInt(b.id()!))
+            .pop();
+
+          if (lastMessage) {
+            dialog!.pushData({
+              relationships: {
+                ...dialog!.data.relationships,
+                lastMessage: {
+                  data: {
+                    type: 'dialog-messages',
+                    id: lastMessage.id()!,
+                  },
+                },
+              },
+            });
+            dialog.pushAttributes({
+              lastMessageId: parseInt(lastMessage.id()!),
+            });
+          }
+        }
+      }
+
       m.redraw();
     });
   },

extensions/messages/src/Api/Resource/DialogResource.php

@@ -68,9 +68,6 @@ class DialogResource extends Resource\AbstractDatabaseResource
                     $connection = UserDialogState::query()->getConnection();
                     $grammar = UserDialogState::query()->getGrammar();
 
-                    $table = $grammar->wrapTable('dialogs');
-                    $column = $grammar->wrap('last_message_id');
-
                     UserDialogState::query()
                         ->where('dialog_user.user_id', $context->getActor()->id)
                         ->update([
@@ -121,6 +118,7 @@ class DialogResource extends Resource\AbstractDatabaseResource
                 ->get(function (Dialog $dialog) {
                     return $dialog->state->last_read_at;
                 }),
+            Schema\Integer::make('lastMessageId'),
             Schema\Integer::make('lastReadMessageId')
                 ->visible(fn (Dialog $dialog) => $dialog->state !== null)
                 ->get(function (Dialog $dialog) {

extensions/messages/src/DialogMessage.php

@@ -70,6 +70,24 @@ class DialogMessage extends AbstractModel implements Formattable
                     ->toSql()
                 .')');
         });
+
+        static::deleted(function (self $message) {
+            if ($message->dialog) {
+                if ($message->dialog->messages()->count() === 0) {
+                    $message->dialog->delete();
+                } elseif ($message->dialog->first_message_id === $message->id) {
+                    $message->dialog->setFirstMessage(
+                        $message->dialog->messages()->oldest('id')->first()
+                    );
+                    $message->dialog->save();
+                } elseif ($message->dialog->last_message_id === $message->id) {
+                    $message->dialog->setLastMessage(
+                        $message->dialog->messages()->latest('id')->first()
+                    );
+                    $message->dialog->save();
+                }
+            }
+        });
     }
 
     public function dialog(): BelongsTo

framework/core/js/src/common/common.ts

@@ -63,7 +63,6 @@ import './components/FieldSet';
 import './components/Select';
 import './components/Navigation';
 import './components/Alert';
-import './components/LabelValue';
 import './components/Link';
 import './components/LinkButton';
 import './components/Checkbox';