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<?php
namespace Elastica;
/**
* Elastica tools.
*
* @author Nicolas Ruflin <spam@ruflin.com>
* @author Thibault Duplessis <thibault.duplessis@gmail.com>
* @author Oleg Zinchenko <olegz@default-value.com>
* @author Roberto Nygaard <roberto@nygaard.es>
*/
class Util
{
/**
* Replace the following reserved words: AND OR NOT
* and
* escapes the following terms: + - && || ! ( ) { } [ ] ^ " ~ * ? : \.
*
* @link http://lucene.apache.org/java/2_4_0/queryparsersyntax.html#Boolean%20operators
* @link http://lucene.apache.org/java/2_4_0/queryparsersyntax.html#Escaping%20Special%20Characters
*
* @param string $term Query term to replace and escape
*
* @return string Replaced and escaped query term
*/
public static function replaceBooleanWordsAndEscapeTerm($term)
{
$result = $term;
$result = self::replaceBooleanWords($result);
$result = self::escapeTerm($result);
return $result;
}
/**
* Escapes the following terms (because part of the query language)
* + - && || ! ( ) { } [ ] ^ " ~ * ? : \ < >.
*
* @link http://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html#_reserved_characters
*
* @param string $term Query term to escape
*
* @return string Escaped query term
*/
public static function escapeTerm($term)
{
$result = $term;
// \ escaping has to be first, otherwise escaped later once again
$chars = array('\\', '+', '-', '&&', '||', '!', '(', ')', '{', '}', '[', ']', '^', '"', '~', '*', '?', ':', '/', '<', '>');
foreach ($chars as $char) {
$result = str_replace($char, '\\'.$char, $result);
}
return $result;
}
/**
* Replace the following reserved words (because part of the query language)
* AND OR NOT.
*
* @link http://lucene.apache.org/java/2_4_0/queryparsersyntax.html#Boolean%20operators
*
* @param string $term Query term to replace
*
* @return string Replaced query term
*/
public static function replaceBooleanWords($term)
{
$replacementMap = array(' AND ' => ' && ', ' OR ' => ' || ', ' NOT ' => ' !');
$result = strtr($term, $replacementMap);
return $result;
}
/**
* Converts a snake_case string to CamelCase.
*
* For example: hello_world to HelloWorld
*
* @param string $string snake_case string
*
* @return string CamelCase string
*/
public static function toCamelCase($string)
{
return str_replace(' ', '', ucwords(str_replace('_', ' ', $string)));
}
/**
* Converts a CamelCase string to snake_case.
*
* For Example HelloWorld to hello_world
*
* @param string $string CamelCase String to Convert
*
* @return string SnakeCase string
*/
public static function toSnakeCase($string)
{
$string = preg_replace('/([A-Z])/', '_$1', $string);
return strtolower(substr($string, 1));
}
/**
* Converts given time to format: 1995-12-31T23:59:59Z.
*
* This is the lucene date format
*
* @param int $date Date input (could be string etc.) -> must be supported by strtotime
*
* @return string Converted date string
*/
public static function convertDate($date)
{
if (is_int($date)) {
$timestamp = $date;
} else {
$timestamp = strtotime($date);
}
$string = date('Y-m-d\TH:i:s\Z', $timestamp);
return $string;
}
/**
* Convert a \DateTime object to format: 1995-12-31T23:59:59Z+02:00.
*
* Converts it to the lucene format, including the appropriate TimeZone
*
* @param \DateTime $dateTime
* @param bool $includeTimezone
*
* @return string
*/
public static function convertDateTimeObject(\DateTime $dateTime, $includeTimezone = true)
{
$formatString = 'Y-m-d\TH:i:s'.($includeTimezone === true ? 'P' : '\Z');
$string = $dateTime->format($formatString);
return $string;
}
/**
* Tries to guess the name of the param, based on its class
* Example: \Elastica\Filter\HasChildFilter => has_child.
*
* @param string|object Class or Class name
*
* @return string parameter name
*/
public static function getParamName($class)
{
if (is_object($class)) {
$class = get_class($class);
}
$parts = explode('\\', $class);
$last = array_pop($parts);
$last = preg_replace('/(Facet|Query|Filter)$/', '', $last);
$name = self::toSnakeCase($last);
return $name;
}
/**
* Converts Request to Curl console command.
*
* @param Request $request
*
* @return string
*/
public static function convertRequestToCurlCommand(Request $request)
{
$message = 'curl -X'.strtoupper($request->getMethod()).' ';
$message .= '\'http://'.$request->getConnection()->getHost().':'.$request->getConnection()->getPort().'/';
$message .= $request->getPath();
$query = $request->getQuery();
if (!empty($query)) {
$message .= '?'.http_build_query($query);
}
$message .= '\'';
$data = $request->getData();
if (!empty($data)) {
$message .= ' -d \''.JSON::stringify($data).'\'';
}
return $message;
}
}
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