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<?php
namespace Guzzle\Service\Builder;
use Guzzle\Service\AbstractConfigLoader;
use Guzzle\Service\Exception\ServiceNotFoundException;
/**
* Service builder config loader
*/
class ServiceBuilderLoader extends AbstractConfigLoader
{
protected function build($config, array $options)
{
// A service builder class can be specified in the class field
$class = !empty($config['class']) ? $config['class'] : __NAMESPACE__ . '\\ServiceBuilder';
// Account for old style configs that do not have a services array
$services = isset($config['services']) ? $config['services'] : $config;
// Validate the configuration and handle extensions
foreach ($services as $name => &$service) {
$service['params'] = isset($service['params']) ? $service['params'] : array();
// Check if this client builder extends another client
if (!empty($service['extends'])) {
// Make sure that the service it's extending has been defined
if (!isset($services[$service['extends']])) {
throw new ServiceNotFoundException(
"{$name} is trying to extend a non-existent service: {$service['extends']}"
);
}
$extended = &$services[$service['extends']];
// Use the correct class attribute
if (empty($service['class'])) {
$service['class'] = isset($extended['class']) ? $extended['class'] : '';
}
if ($extendsParams = isset($extended['params']) ? $extended['params'] : false) {
$service['params'] = $service['params'] + $extendsParams;
}
}
// Overwrite default values with global parameter values
if (!empty($options)) {
$service['params'] = $options + $service['params'];
}
$service['class'] = isset($service['class']) ? $service['class'] : '';
}
return new $class($services);
}
protected function mergeData(array $a, array $b)
{
$result = $b + $a;
// Merge services using a recursive union of arrays
if (isset($a['services']) && $b['services']) {
// Get a union of the services of the two arrays
$result['services'] = $b['services'] + $a['services'];
// Merge each service in using a union of the two arrays
foreach ($result['services'] as $name => &$service) {
// By default, services completely override a previously defined service unless it extends itself
if (isset($a['services'][$name]['extends'])
&& isset($b['services'][$name]['extends'])
&& $b['services'][$name]['extends'] == $name
) {
$service += $a['services'][$name];
// Use the `extends` attribute of the parent
$service['extends'] = $a['services'][$name]['extends'];
// Merge parameters using a union if both have parameters
if (isset($a['services'][$name]['params'])) {
$service['params'] += $a['services'][$name]['params'];
}
}
}
}
return $result;
}
}
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