Add chunk method to BaseCollection

- Add test for BaseCollection->chunk

src/BaseCollection.php

@@ -129,6 +129,24 @@ class BaseCollection extends \ArrayIterator
 		return new static(array_reverse($this->getArrayCopy()), $this->getTotalCount());
 	}
 
+	/**
+	 * Split the collection in smaller collections no bigger than the provided length
+	 *
+	 * @param int $length
+	 * @return static[]
+	 */
+	public function chunk(int $length): array
+	{
+		if ($length < 1) {
+			throw new \RangeException('BaseCollection->chunk(): Size parameter expected to be greater than 0');
+		}
+
+		return array_map(function ($array) {
+			return new static($array);
+		}, array_chunk($this->getArrayCopy(), $length));
+	}
+
+
 	/**
 	 * @inheritDoc
 	 *

tests/src/BaseCollectionTest.php

@@ -0,0 +1,66 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2023, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Test\src;
+
+use Friendica\BaseCollection;
+use Friendica\BaseEntity;
+use Mockery\Mock;
+use PHPUnit\Framework\TestCase;
+
+class BaseCollectionTest extends TestCase
+{
+	public function testChunk()
+	{
+		$entity1 = \Mockery::mock(BaseEntity::class);
+		$entity2 = \Mockery::mock(BaseEntity::class);
+		$entity3 = \Mockery::mock(BaseEntity::class);
+		$entity4 = \Mockery::mock(BaseEntity::class);
+
+		$collection = new BaseCollection([$entity1, $entity2]);
+
+		$this->assertEquals([new BaseCollection([$entity1]), new BaseCollection([$entity2])], $collection->chunk(1));
+		$this->assertEquals([new BaseCollection([$entity1, $entity2])], $collection->chunk(2));
+
+		$collection = new BaseCollection([$entity1, $entity2, $entity3]);
+
+		$this->assertEquals([new BaseCollection([$entity1]), new BaseCollection([$entity2]), new BaseCollection([$entity3])], $collection->chunk(1));
+		$this->assertEquals([new BaseCollection([$entity1, $entity2]), new BaseCollection([$entity3])], $collection->chunk(2));
+		$this->assertEquals([new BaseCollection([$entity1, $entity2, $entity3])], $collection->chunk(3));
+
+		$collection = new BaseCollection([$entity1, $entity2, $entity3, $entity4]);
+
+		$this->assertEquals([new BaseCollection([$entity1, $entity2]), new BaseCollection([$entity3, $entity4])], $collection->chunk(2));
+		$this->assertEquals([new BaseCollection([$entity1, $entity2, $entity3]), new BaseCollection([$entity4])], $collection->chunk(3));
+		$this->assertEquals([new BaseCollection([$entity1, $entity2, $entity3, $entity4])], $collection->chunk(4));
+	}
+
+	public function testChunkLengthException()
+	{
+		$this->expectException(\RangeException::class);
+
+		$entity1 = \Mockery::mock(BaseEntity::class);
+
+		$collection = new BaseCollection([$entity1]);
+
+		$collection->chunk(0);
+	}
+}