diff --git a/src/Plugin/search_api/data_type/DateRangeDataType.php b/src/Plugin/search_api/data_type/DateRangeDataType.php
new file mode 100644
index 0000000000000000000000000000000000000000..01cc5bcee1970aad51bbb234c50623fd1f224f87
--- /dev/null
+++ b/src/Plugin/search_api/data_type/DateRangeDataType.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace Drupal\search_api_opensearch\Plugin\search_api\data_type;
+
+use Drupal\search_api\Plugin\search_api\data_type\DateDataType;
+
+/**
+ * Provides a date range data type.
+ *
+ * @SearchApiDataType(
+ * id = "search_api_opensearch_date_range",
+ * label = @Translation("Date range"),
+ * description = @Translation("Date field that contains date ranges."),
+ * fallback = "date",
+ * prefix = "dr"
+ * )
+ */
+class DateRangeDataType extends DateDataType {
+
+}
diff --git a/src/Plugin/search_api/processor/DateRange.php b/src/Plugin/search_api/processor/DateRange.php
new file mode 100644
index 0000000000000000000000000000000000000000..2537e0141a66ec1498fa1f9ee6241350be6a8b27
--- /dev/null
+++ b/src/Plugin/search_api/processor/DateRange.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace Drupal\search_api_opensearch\Plugin\search_api\processor;
+
+use Drupal\search_api\Processor\ProcessorPluginBase;
+
+/**
+ * Add date ranges to the index.
+ *
+ * @SearchApiProcessor(
+ * id = "search_api_opensearch_date_range",
+ * label = @Translation("Date ranges"),
+ * description = @Translation("Date ranges."),
+ * stages = {
+ * "preprocess_index" = 0,
+ * },
+ * locked = true,
+ * hidden = true,
+ * )
+ */
+class DateRange extends ProcessorPluginBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function preprocessIndexItems(array $items) {
+ foreach ($items as $item) {
+ foreach ($item->getFields() as $field) {
+ if ('search_api_opensearch_date_range' == $field->getType()) {
+ $required_properties = [
+ $item->getDatasourceId() => [
+ $field->getPropertyPath() . ':value' => 'start',
+ $field->getPropertyPath() . ':end_value' => 'end',
+ ],
+ ];
+ $item_values = $this->getFieldsHelper()->extractItemValues([$item], $required_properties);
+ foreach ($item_values as $dates) {
+ $start_dates = $dates['start'];
+ $end_dates = $dates['end'];
+ for ($i = 0, $n = count($start_dates); $i < $n; $i++) {
+ $values[$i] = [
+ 'gte' => $start_dates[$i],
+ 'lte' => $end_dates[$i],
+ ];
+ }
+ }
+ if (!empty($values)) {
+ $field->setValues($values);
+ }
+ }
+ }
+ }
+ }
+
+}
diff --git a/src/SearchAPI/FieldMapper.php b/src/SearchAPI/FieldMapper.php
index 5d8aca3ad8f5affe94ac9ea9e364bec3cd24348b..ef69606a6065b10700bfb42dc092e5c9ab3657c5 100644
--- a/src/SearchAPI/FieldMapper.php
+++ b/src/SearchAPI/FieldMapper.php
@@ -145,6 +145,10 @@ class FieldMapper {
'type' => 'date',
'format' => 'strict_date_optional_time||epoch_second',
],
+ 'search_api_opensearch_date_range' => [
+ 'type' => 'date_range',
+ 'format' => 'strict_date_optional_time||epoch_second',
+ ],
'attachment' => ['type' => 'attachment'],
'object' => ['type' => 'nested'],
'location' => ['type' => 'geo_point'],
diff --git a/tests/src/Kernel/DataTypeTest.php b/tests/src/Kernel/DataTypeTest.php
index ff735e6775be10fc0f0d71f5f94eff4f268380e5..03b85a24492f03e471ff529ebb0f17b6e1b68ef8 100644
--- a/tests/src/Kernel/DataTypeTest.php
+++ b/tests/src/Kernel/DataTypeTest.php
@@ -29,4 +29,17 @@ class DataTypeTest extends KernelTestBase {
$this->assertEquals('search_api_opensearch', $definition['provider']);
}
+ /**
+ * Tests the date range type is found.
+ */
+ public function testHasDateRangeDataType() {
+ /** @var \Drupal\search_api\DataType\DataTypePluginManager $manager */
+ $manager = $this->container->get('plugin.manager.search_api.data_type');
+ $definitions = $manager->getDefinitions();
+ $this->assertArrayHasKey('search_api_opensearch_date_range', $definitions);
+ $definition = $definitions['search_api_opensearch_date_range'];
+ $this->assertEquals('search_api_opensearch_date_range', $definition['id']);
+ $this->assertEquals('search_api_opensearch', $definition['provider']);
+ }
+
}
diff --git a/tests/src/Unit/Plugin/processor/DateRangeTest.php b/tests/src/Unit/Plugin/processor/DateRangeTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..1175fbddfc850bc0a4c86f9cf9fbc27b774ca1c3
--- /dev/null
+++ b/tests/src/Unit/Plugin/processor/DateRangeTest.php
@@ -0,0 +1,128 @@
+<?php
+
+namespace Drupal\Tests\search_api_opensearch\Unit\Plugin\processor;
+
+use Drupal\search_api\Datasource\DatasourceInterface;
+use Drupal\search_api\IndexInterface;
+use Drupal\search_api\Item\Field;
+use Drupal\search_api\Item\Item;
+use Drupal\search_api\Utility\FieldsHelper;
+use Drupal\search_api_opensearch\Plugin\search_api\processor\DateRange;
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * Tests the date range processor.
+ *
+ * @coversDefaultClass \Drupal\search_api_opensearch\Plugin\search_api\processor\DateRange
+ * @group search_api_opensearch
+ */
+class DateRangeTest extends UnitTestCase {
+
+ /**
+ * Test making date range field types compatible with OS.
+ *
+ * @covers ::preprocessIndexItems
+ * @dataProvider dateValueDataProvider
+ */
+ public function testPreProcessingDateRangeItems(
+ array $extractItemResult,
+ array $expectedResult
+ ): void {
+
+ $dataSource = $this->prophesize(DatasourceInterface::class);
+ $dataSource->getPluginId()->willReturn('entity:node');
+
+ $index = $this->prophesize(IndexInterface::class);
+ $indexId = "index_" . $this->randomMachineName();
+ $index->id()->willReturn($indexId);
+
+ $itemId = "item1_" . $this->randomMachineName();
+
+ $item = (new Item($index->reveal(), $itemId, $dataSource->reveal()))
+ ->setFieldsExtracted(TRUE)
+ ->setField(
+ 'event_date_range',
+ (new Field($index->reveal(), 'event_date_range'))
+ ->setType("search_api_opensearch_date_range")
+ ->setPropertyPath('field_event_instance')
+ );
+
+ $fieldsHelper = $this->prophesize(FieldsHelper::class);
+ $fieldsHelper->extractItemValues([$item], [
+ 'entity:node' => [
+ 'field_event_instance:value' => 'start',
+ 'field_event_instance:end_value' => 'end',
+ ],
+ ])->willReturn($extractItemResult);
+
+ $dateRange = new DateRange([], 'search_api_opensearch_date_range', []);
+ $dateRange->setFieldsHelper($fieldsHelper->reveal());
+
+ $dateRange->preprocessIndexItems([$item]);
+
+ $fieldValues = $item->getField('event_date_range')->getValues();
+
+ $this->assertEquals($expectedResult, $fieldValues);
+
+ }
+
+ /**
+ * Provides dummy date range data.
+ */
+ public function dateValueDataProvider(): array {
+ return [
+ 'Single date range' => [
+ [
+ [
+ 'start' => [
+ '2022-07-01T09:30:00',
+ ],
+ 'end' => [
+ '2022-07-01T13:00:00',
+ ],
+ ],
+ ],
+ [
+ [
+ 'gte' => '2022-07-01T09:30:00',
+ 'lte' => '2022-07-01T13:00:00',
+ ],
+ ],
+ ],
+ 'Multiple date ranges' => [
+ [
+ [
+ 'start' => [
+ '2022-07-01T09:30:00',
+ '2022-08-05T09:30:00',
+ ],
+ 'end' => [
+ '2022-07-01T13:00:00',
+ '2022-08-05T13:00:00',
+ ],
+ ],
+ ],
+ [
+ [
+ 'gte' => '2022-07-01T09:30:00',
+ 'lte' => '2022-07-01T13:00:00',
+ ],
+ [
+ 'gte' => '2022-08-05T09:30:00',
+ 'lte' => '2022-08-05T13:00:00',
+ ],
+ ],
+ ],
+ 'No date ranges' => [
+ [
+ [
+ 'start' => [],
+ 'end' => [],
+ ],
+ ],
+ [],
+ ],
+ ];
+ }
+
+}