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<?php
/**
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 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
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 */

namespace yii\elasticsearch;

use yii\base\Component;
use yii\helpers\Json;

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/**
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 * The Command class implements the API for accessing the elasticsearch REST API.
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 *
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 * Check the [elasticsearch guide](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/index.html)
 * for details on these commands.
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 *
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 * @author Carsten Brandt <mail@cebe.cc>
 * @since 2.0
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 */
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class Command extends Component
{
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    /**
     * @var Connection
     */
    public $db;
    /**
     * @var string|array the indexes to execute the query on. Defaults to null meaning all indexes
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search.html#search-multi-index
     */
    public $index;
    /**
     * @var string|array the types to execute the query on. Defaults to null meaning all types
     */
    public $type;
    /**
     * @var array list of arrays or json strings that become parts of a query
     */
    public $queryParts;

    public $options = [];

    /**
     * @param  array $options
     * @return mixed
     */
    public function search($options = [])
    {
        $query = $this->queryParts;
        if (empty($query)) {
            $query = '{}';
        }
        if (is_array($query)) {
            $query = Json::encode($query);
        }
        $url = [
            $this->index !== null ? $this->index : '_all',
            $this->type !== null ? $this->type : '_all',
            '_search'
        ];

        return $this->db->get($url, array_merge($this->options, $options), $query);
    }

    /**
     * Inserts a document into an index
     * @param  string       $index
     * @param  string       $type
     * @param  string|array $data    json string or array of data to store
     * @param  null         $id      the documents id. If not specified Id will be automatically chosen
     * @param  array        $options
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-index_.html
     */
    public function insert($index, $type, $data, $id = null, $options = [])
    {
        $body = is_array($data) ? Json::encode($data) : $data;

        if ($id !== null) {
            return $this->db->put([$index, $type, $id], $options, $body);
        } else {
            return $this->db->post([$index, $type], $options, $body);
        }
    }

    /**
     * gets a document from the index
     * @param $index
     * @param $type
     * @param $id
     * @param  array $options
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-get.html
     */
    public function get($index, $type, $id, $options = [])
    {
        return $this->db->get([$index, $type, $id], $options, null);
    }

    /**
     * gets multiple documents from the index
     *
     * TODO allow specifying type and index + fields
     * @param $index
     * @param $type
     * @param $ids
     * @param  array $options
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-multi-get.html
     */
    public function mget($index, $type, $ids, $options = [])
    {
        $body = Json::encode(['ids' => array_values($ids)]);

        return $this->db->get([$index, $type, '_mget'], $options, $body);
    }

    /**
     * gets a documents _source from the index (>=v0.90.1)
     * @param $index
     * @param $type
     * @param $id
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-get.html#_source
     */
    public function getSource($index, $type, $id)
    {
        return $this->db->get([$index, $type, $id]);
    }

    /**
     * gets a document from the index
     * @param $index
     * @param $type
     * @param $id
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-get.html
     */
    public function exists($index, $type, $id)
    {
        return $this->db->head([$index, $type, $id]);
    }

    /**
     * deletes a document from the index
     * @param $index
     * @param $type
     * @param $id
     * @param  array $options
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-delete.html
     */
    public function delete($index, $type, $id, $options = [])
    {
        return $this->db->delete([$index, $type, $id], $options);
    }

    /**
     * updates a document
     * @param $index
     * @param $type
     * @param $id
     * @param  array $options
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-update.html
     */
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//	public function update($index, $type, $id, $data, $options = [])
//	{
//		// TODO implement
////		return $this->db->delete([$index, $type, $id], $options);
//	}
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    // TODO bulk http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-bulk.html

    /**
     * creates an index
     * @param $index
     * @param  array $configuration
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-create-index.html
     */
    public function createIndex($index, $configuration = null)
    {
        $body = $configuration !== null ? Json::encode($configuration) : null;

        return $this->db->put([$index], $body);
    }

    /**
     * deletes an index
     * @param $index
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-delete-index.html
     */
    public function deleteIndex($index)
    {
        return $this->db->delete([$index]);
    }

    /**
     * deletes all indexes
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-delete-index.html
     */
    public function deleteAllIndexes()
    {
        return $this->db->delete(['_all']);
    }

    /**
     * checks whether an index exists
     * @param $index
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-exists.html
     */
    public function indexExists($index)
    {
        return $this->db->head([$index]);
    }

    /**
     * @param $index
     * @param $type
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-types-exists.html
     */
    public function typeExists($index, $type)
    {
        return $this->db->head([$index, $type]);
    }

    // TODO http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-aliases.html

    // TODO http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-update-settings.html
    // TODO http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-get-settings.html

    // TODO http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-warmers.html

    /**
     * @param $index
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-open-close.html
     */
    public function openIndex($index)
    {
        return $this->db->post([$index, '_open']);
    }

    /**
     * @param $index
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-open-close.html
     */
    public function closeIndex($index)
    {
        return $this->db->post([$index, '_close']);
    }

    /**
     * @param $index
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-status.html
     */
    public function getIndexStatus($index = '_all')
    {
        return $this->db->get([$index, '_status']);
    }

    // TODO http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-stats.html
    // http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-segments.html

    /**
     * @param $index
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-clearcache.html
     */
    public function clearIndexCache($index)
    {
        return $this->db->post([$index, '_cache', 'clear']);
    }

    /**
     * @param $index
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-flush.html
     */
    public function flushIndex($index = '_all')
    {
        return $this->db->post([$index, '_flush']);
    }

    /**
     * @param $index
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-refresh.html
     */
    public function refreshIndex($index)
    {
        return $this->db->post([$index, '_refresh']);
    }

    // TODO http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-optimize.html

    // TODO http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-gateway-snapshot.html

    /**
     * @param $index
     * @param $type
     * @param $mapping
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-put-mapping.html
     */
    public function setMapping($index, $type, $mapping, $options = [])
    {
        $body = $mapping !== null ? (is_string($mapping) ? $mapping : Json::encode($mapping)) : null;

        return $this->db->put([$index, $type, '_mapping'], $options, $body);
    }

    /**
     * @param  string $index
     * @param  string $type
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-get-mapping.html
     */
    public function getMapping($index = '_all', $type = '_all')
    {
        return $this->db->get([$index, $type, '_mapping']);
    }

    /**
     * @param $index
     * @param $type
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-put-mapping.html
     */
    public function deleteMapping($index, $type)
    {
        return $this->db->delete([$index, $type]);
    }

    /**
     * @param $index
     * @param  string $type
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-get-field-mapping.html
     */
    public function getFieldMapping($index, $type = '_all')
    {
        return $this->db->put([$index, $type, '_mapping']);
    }

    /**
     * @param $options
     * @param $index
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-analyze.html
     */
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//	public function analyze($options, $index = null)
//	{
//		// TODO implement
////		return $this->db->put([$index]);
//	}
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    /**
     * @param $name
     * @param $pattern
     * @param $settings
     * @param $mappings
     * @param  integer $order
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-templates.html
     */
    public function createTemplate($name, $pattern, $settings, $mappings, $order = 0)
    {
        $body = Json::encode([
            'template' => $pattern,
            'order' => $order,
            'settings' => (object) $settings,
            'mappings' => (object) $mappings,
        ]);

        return $this->db->put(['_template', $name], $body);

    }

    /**
     * @param $name
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-templates.html
     */
    public function deleteTemplate($name)
    {
        return $this->db->delete(['_template', $name]);

    }

    /**
     * @param $name
     * @return mixed
     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-templates.html
     */
    public function getTemplate($name)
    {
        return $this->db->get(['_template', $name]);
    }
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}