<?php
namespace Aws\Api\Serializer;
use Aws\Api\MapShape;
use Aws\Api\Service;
use Aws\Api\Shape;
use Aws\Api\StructureShape;
use Aws\Api\ListShape;
use Aws\Api\TimestampShape;
use XMLWriter;
/**
* @internal Formats the XML body of a REST-XML services.
*/
class XmlBody
{
/** @var \Aws\Api\Service */
private $api;
/**
* @param Service $api API being used to create the XML body.
*/
public function __construct(Service $api)
{
$this->api = $api;
}
/**
* Builds the XML body based on an array of arguments.
*
* @param Shape $shape Operation being constructed
* @param array $args Associative array of arguments
*
* @return string
*/
public function build(Shape $shape, array $args)
{
$xml = new XMLWriter();
$xml->openMemory();
$xml->startDocument('1.0', 'UTF-8');
$this->format($shape, $shape['locationName'] ?: $shape['name'], $args, $xml);
$xml->endDocument();
return $xml->outputMemory();
}
private function startElement(Shape $shape, $name, XMLWriter $xml)
{
$xml->startElement($name);
if ($ns = $shape['xmlNamespace']) {
$xml->writeAttribute(
isset($ns['prefix']) ? "xmlns:{$ns['prefix']}" : 'xmlns',
$shape['xmlNamespace']['uri']
);
}
}
private function format(Shape $shape, $name, $value, XMLWriter $xml)
{
// Any method mentioned here has a custom serialization handler.
static $methods = [
'add_structure' => true,
'add_list' => true,
'add_blob' => true,
'add_timestamp' => true,
'add_boolean' => true,
'add_map' => true,
'add_string' => true
];
$type = 'add_' . $shape['type'];
if (isset($methods[$type])) {
$this->{$type}($shape, $name, $value, $xml);
} else {
$this->defaultShape($shape, $name, $value, $xml);
}
}
private function defaultShape(Shape $shape, $name, $value, XMLWriter $xml)
{
$this->startElement($shape, $name, $xml);
$xml->text($value);
$xml->endElement();
}
private function add_structure(
StructureShape $shape,
$name,
array $value,
\XMLWriter $xml
) {
$this->startElement($shape, $name, $xml);
foreach ($this->getStructureMembers($shape, $value) as $k => $definition) {
$this->format(
$definition['member'],
$definition['member']['locationName'] ?: $k,
$definition['value'],
$xml
);
}
$xml->endElement();
}
private function getStructureMembers(StructureShape $shape, array $value)
{
$members = [];
foreach ($value as $k => $v) {
if ($v !== null && $shape->hasMember($k)) {
$definition = [
'member' => $shape->getMember($k),
'value' => $v,
];
if ($definition['member']['xmlAttribute']) {
// array_unshift_associative
$members = [$k => $definition] + $members;
} else {
$members[$k] = $definition;
}
}
}
return $members;
}
private function add_list(
ListShape $shape,
$name,
array $value,
XMLWriter $xml
) {
$items = $shape->getMember();
if ($shape['flattened']) {
$elementName = $name;
} else {
$this->startElement($shape, $name, $xml);
$elementName = $items['locationName'] ?: 'member';
}
foreach ($value as $v) {
$this->format($items, $elementName, $v, $xml);
}
if (!$shape['flattened']) {
$xml->endElement();
}
}
private function add_map(
MapShape $shape,
$name,
array $value,
XMLWriter $xml
) {
$xmlEntry = $shape['flattened'] ? $shape['locationName'] : 'entry';
$xmlKey = $shape->getKey()['locationName'] ?: 'key';
$xmlValue = $shape->getValue()['locationName'] ?: 'value';
$this->startElement($shape, $name, $xml);
foreach ($value as $key => $v) {
$this->startElement($shape, $xmlEntry, $xml);
$this->format($shape->getKey(), $xmlKey, $key, $xml);
$this->format($shape->getValue(), $xmlValue, $v, $xml);
$xml->endElement();
}
$xml->endElement();
}
private function add_blob(Shape $shape, $name, $value, XMLWriter $xml)
{
$this->startElement($shape, $name, $xml);
$xml->writeRaw(base64_encode($value));
$xml->endElement();
}
private function add_timestamp(
TimestampShape $shape,
$name,
$value,
XMLWriter $xml
) {
$this->startElement($shape, $name, $xml);
$timestampFormat = !empty($shape['timestampFormat'])
? $shape['timestampFormat']
: 'iso8601';
$xml->writeRaw(TimestampShape::format($value, $timestampFormat));
$xml->endElement();
}
private function add_boolean(
Shape $shape,
$name,
$value,
XMLWriter $xml
) {
$this->startElement($shape, $name, $xml);
$xml->writeRaw($value ? 'true' : 'false');
$xml->endElement();
}
private function add_string(
Shape $shape,
$name,
$value,
XMLWriter $xml
) {
if ($shape['xmlAttribute']) {
$xml->writeAttribute($shape['locationName'] ?: $name, $value);
} else {
$this->defaultShape($shape, $name, $value, $xml);
}
}
}