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<?php
/**
* Copyright 2014 Klarna AB
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* File containing the UserAgent class.
*/
namespace Klarna\Rest\Transport;
use GuzzleHttp\ClientInterface;
/**
* HTTP user agent.
*/
class UserAgent implements UserAgentInterface
{
/**
* Name of the SDK
*/
const NAME = 'Klarna.kco_rest_php';
/**
* Version of the SDK.
*/
const VERSION = '2.2.0';
/**
* Components of the user agent.
*
* @var array
*/
protected $fields;
/**
* Constructs a user agent instance.
*/
public function __construct()
{
$this->fields = [];
}
/**
* Sets the specified field.
*
* @param string $key Component key, e.g. 'Language'
* @param string $name Component name, e.g. 'PHP'
* @param string $version Version identifier, e.g. '5.4.10'
* @param array $options Additional information
*
* @return self
*/
public function setField($key, $name, $version = '', array $options = [])
{
$field = [
'name' => $name
];
if (!empty($version)) {
$field['version'] = $version;
}
if (!empty($options)) {
$field['options'] = $options;
}
$this->fields[$key] = $field;
return $this;
}
/**
* Serialises the user agent.
*
* @return string
*/
public function __toString()
{
$parts = [];
foreach ($this->fields as $key => $value) {
$component = "{$key}/{$value['name']}";
if (!empty($value['version'])) {
$component .= "_{$value['version']}";
}
$parts[] = $component;
if (empty($value['options'])) {
continue;
}
$opts = implode('; ', $value['options']);
$parts[] = "({$opts})";
}
return implode(' ', $parts);
}
/**
* Creates the default user agent.
*
* @return self
*/
public static function createDefault()
{
$agent = new static();
$options = ['Guzzle/' . ClientInterface::VERSION];
if (extension_loaded('curl')) {
$options[] = 'curl/' . curl_version()['version'];
}
return $agent
->setField('Library', static::NAME, static::VERSION, $options)
->setField('OS', php_uname('s'), php_uname('r'))
->setField('Language', 'PHP', phpversion());
}
}