ISSUE #1670: Fix Undefined array key in BuildRewindHtmlCommandHandler.php

Author: robiningelbrecht

composer.lock

@@ -339,6 +339,10 @@ public function handle(Command $command): void
                 );
             }
         }
+        if (1 === count($availableRewindOptions)) {
+            // "All time" option is the only one. No need to compare rewinds.
+            return;
+        }
 
         foreach ($availableRewindOptions as $availableRewindOptionLeft) {
             $defaultRewindYearToCompareWith = $availableRewindOptions[0] != $availableRewindOptionLeft ? $availableRewindOptions[0] : $availableRewindOptions[1];

src/Application/Build/BuildRewindHtml/BuildRewindHtmlCommandHandler.php

@@ -29,4 +29,19 @@ public function testHandle(): void
         $this->commandBus->dispatch(new BuildRewindHtml(SerializableDateTime::fromString('2025-10-01T00:00:00+00:00')));
         $this->assertFileSystemWrites($this->getContainer()->get('build.storage'));
     }
+
+    public function testHandleWhenNoRewindsToCompare(): void
+    {
+        $this->getContainer()->get(ActivityWithRawDataRepository::class)->add(ActivityWithRawData::fromState(
+            ActivityBuilder::fromDefaults()
+                ->withActivityId(ActivityId::random())
+                ->withSportType(SportType::WALK)
+                ->withStartDateTime(SerializableDateTime::fromString('2023-03-01'))
+                ->build(),
+            []
+        ));
+
+        $this->commandBus->dispatch(new BuildRewindHtml(SerializableDateTime::fromString('2023-10-01T00:00:00+00:00')));
+        $this->assertFileSystemWrites($this->getContainer()->get('build.storage'));
+    }
 }