mirror of
https://gitlab.com/signalytic/client-external/streamline/streamline-emr.git
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Import latest app updates from streamline
An updated set of source files and initialization was provided by streamline to address issues observed during initial testing. These files have been updated in order to generate a new set of app images.
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\HttpFoundation;
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/**
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* StreamedJsonResponse represents a streamed HTTP response for JSON.
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*
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* A StreamedJsonResponse uses a structure and generics to create an
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* efficient resource-saving JSON response.
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*
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* It is recommended to use flush() function after a specific number of items to directly stream the data.
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*
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* @see flush()
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*
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* @author Alexander Schranz <alexander@sulu.io>
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*
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* Example usage:
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*
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* function loadArticles(): \Generator
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* // some streamed loading
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* yield ['title' => 'Article 1'];
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* yield ['title' => 'Article 2'];
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* yield ['title' => 'Article 3'];
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* // recommended to use flush() after every specific number of items
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* }),
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*
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* $response = new StreamedJsonResponse(
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* // json structure with generators in which will be streamed
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* [
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* '_embedded' => [
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* 'articles' => loadArticles(), // any generator which you want to stream as list of data
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* ],
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* ],
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* );
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*/
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class StreamedJsonResponse extends StreamedResponse
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{
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private const PLACEHOLDER = '__symfony_json__';
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/**
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* @param mixed[] $data JSON Data containing PHP generators which will be streamed as list of data or a Generator
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* @param int $status The HTTP status code (200 "OK" by default)
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* @param array<string, string|string[]> $headers An array of HTTP headers
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* @param int $encodingOptions Flags for the json_encode() function
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*/
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public function __construct(
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private readonly iterable $data,
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int $status = 200,
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array $headers = [],
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private int $encodingOptions = JsonResponse::DEFAULT_ENCODING_OPTIONS,
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) {
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parent::__construct($this->stream(...), $status, $headers);
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if (!$this->headers->get('Content-Type')) {
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$this->headers->set('Content-Type', 'application/json');
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}
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}
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private function stream(): void
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{
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$jsonEncodingOptions = \JSON_THROW_ON_ERROR | $this->encodingOptions;
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$keyEncodingOptions = $jsonEncodingOptions & ~\JSON_NUMERIC_CHECK;
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$this->streamData($this->data, $jsonEncodingOptions, $keyEncodingOptions);
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}
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private function streamData(mixed $data, int $jsonEncodingOptions, int $keyEncodingOptions): void
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{
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if (\is_array($data)) {
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$this->streamArray($data, $jsonEncodingOptions, $keyEncodingOptions);
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return;
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}
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if (is_iterable($data) && !$data instanceof \JsonSerializable) {
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$this->streamIterable($data, $jsonEncodingOptions, $keyEncodingOptions);
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return;
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}
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echo json_encode($data, $jsonEncodingOptions);
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}
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private function streamArray(array $data, int $jsonEncodingOptions, int $keyEncodingOptions): void
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{
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$generators = [];
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array_walk_recursive($data, function (&$item, $key) use (&$generators) {
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if (self::PLACEHOLDER === $key) {
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// if the placeholder is already in the structure it should be replaced with a new one that explode
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// works like expected for the structure
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$generators[] = $key;
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}
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// generators should be used but for better DX all kind of Traversable and objects are supported
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if (\is_object($item)) {
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$generators[] = $item;
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$item = self::PLACEHOLDER;
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} elseif (self::PLACEHOLDER === $item) {
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// if the placeholder is already in the structure it should be replaced with a new one that explode
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// works like expected for the structure
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$generators[] = $item;
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}
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});
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$jsonParts = explode('"'.self::PLACEHOLDER.'"', json_encode($data, $jsonEncodingOptions));
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foreach ($generators as $index => $generator) {
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// send first and between parts of the structure
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echo $jsonParts[$index];
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$this->streamData($generator, $jsonEncodingOptions, $keyEncodingOptions);
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}
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// send last part of the structure
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echo $jsonParts[array_key_last($jsonParts)];
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}
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private function streamIterable(iterable $iterable, int $jsonEncodingOptions, int $keyEncodingOptions): void
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{
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$isFirstItem = true;
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$startTag = '[';
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foreach ($iterable as $key => $item) {
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if ($isFirstItem) {
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$isFirstItem = false;
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// depending on the first elements key the generator is detected as a list or map
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// we can not check for a whole list or map because that would hurt the performance
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// of the streamed response which is the main goal of this response class
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if (0 !== $key) {
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$startTag = '{';
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}
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echo $startTag;
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} else {
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// if not first element of the generic, a separator is required between the elements
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echo ',';
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}
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if ('{' === $startTag) {
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echo json_encode((string) $key, $keyEncodingOptions).':';
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}
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$this->streamData($item, $jsonEncodingOptions, $keyEncodingOptions);
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}
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if ($isFirstItem) { // indicates that the generator was empty
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echo '[';
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}
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echo '[' === $startTag ? ']' : '}';
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}
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}
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