New subfileds mapping type

- this type support multiple fields in one context

Author: Spamercz

src/Mapping/Settings.php

@@ -78,6 +78,12 @@ public function addMappingFieldObject(\Spameri\ElasticQuery\Mapping\Settings\Map
 	}
 
 
+	public function addMappingSubField(\Spameri\ElasticQuery\Mapping\Settings\Mapping\SubFields $subFields): void
+	{
+		$this->mapping->addSubField($subFields);
+	}
+
+
 	public function addAnalyzer(\Spameri\ElasticQuery\Mapping\AnalyzerInterface $analyzer): void
 	{
 		$this->analysis->analyzer()->add($analyzer);

src/Mapping/Settings/Mapping.php

@@ -43,12 +43,23 @@ public function addFieldObject(\Spameri\ElasticQuery\Mapping\Settings\Mapping\Fi
 	}
 
 
+	public function addSubField(\Spameri\ElasticQuery\Mapping\Settings\Mapping\SubFields $subFields): void
+	{
+		$this->fields->add($subFields);
+	}
+
+
 	public function toArray(): array
 	{
 		$fields = [];
 		/** @var \Spameri\ElasticQuery\Mapping\Settings\Mapping\FieldInterface $field */
 		foreach ($this->fields as $field) {
-			$fields[$field->key()] = $field->toArray()[$field->key()];
+			if ($field instanceof \Spameri\ElasticQuery\Mapping\Settings\Mapping\SubFields) {
+				$fields[$field->key()] = $field->toArray();
+
+			} else {
+				$fields[$field->key()] = $field->toArray()[$field->key()];
+			}
 		}
 
 		return [

src/Mapping/Settings/Mapping/SubFields.php

@@ -0,0 +1,77 @@
+<?php declare(strict_types = 1);
+
+namespace Spameri\ElasticQuery\Mapping\Settings\Mapping;
+
+class SubFields
+	implements \Spameri\ElasticQuery\Mapping\Settings\Mapping\FieldInterface
+{
+
+	/**
+	 * @var string
+	 */
+	private $name;
+
+	/**
+	 * @var string
+	 */
+	private $type;
+
+	/**
+	 * @var \Spameri\ElasticQuery\Mapping\Settings\Mapping\FieldCollection
+	 */
+	private $fields;
+
+
+	public function __construct(
+		string $name,
+		string $type = \Spameri\Elastic\Model\ValidateMapping\AllowedValues::TYPE_KEYWORD,
+		?\Spameri\ElasticQuery\Mapping\Settings\Mapping\FieldCollection $fields = NULL
+	)
+	{
+		$this->name = $name;
+		if ($fields === NULL) {
+			$fields = new \Spameri\ElasticQuery\Mapping\Settings\Mapping\FieldCollection();
+		}
+
+		if ( ! \in_array($type, \Spameri\Elastic\Model\ValidateMapping\AllowedValues::TYPES, TRUE)) {
+			throw new \Spameri\ElasticQuery\Exception\InvalidArgumentException(
+				'Not allowed type see \Spameri\Elastic\Model\ValidateMapping\AllowedValues::TYPES'
+			);
+		}
+		$this->type = $type;
+		$this->fields = $fields;
+	}
+
+
+	public function key(): string
+	{
+		return $this->name;
+	}
+
+
+	public function getFields(): \Spameri\ElasticQuery\Mapping\Settings\Mapping\FieldCollection
+	{
+		return $this->fields;
+	}
+
+
+	public function addMappingField(\Spameri\ElasticQuery\Mapping\Settings\Mapping\Field $field): void
+	{
+		$this->fields->add($field);
+	}
+
+
+	public function toArray(): array
+	{
+		$array['fields'] = [];
+		$array['type'] = $this->type;
+
+		/** @var \Spameri\ElasticQuery\Mapping\Settings\Mapping\Field $field */
+		foreach ($this->fields as $field) {
+			$array['fields'][$field->key()] = $field->toArray()[$field->key()];
+		}
+
+		return $array;
+	}
+
+}