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LocaleContextBuilder
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1<?php
2namespace Apie\Common\ContextBuilders;
3
4use Apie\Core\Context\ApieContext;
5use Apie\Core\ContextBuilders\ContextBuilderInterface;
6use Apie\Core\ContextConstants;
7use Apie\Core\Utils\LanguageParser;
8use Psr\Http\Message\ServerRequestInterface;
9
10/**
11 * Context builder that reads the Accept-Language and Content-Language headers and adds them to the context.
12 */
13class LocaleContextBuilder implements ContextBuilderInterface
14{
15    public function process(ApieContext $context): ApieContext
16    {
17        $request = $context->getContext(ServerRequestInterface::class, false);
18        if ($request instanceof ServerRequestInterface) {
19            $acceptLanguage = $request->getHeaderLine('Accept-Language');
20            if ($acceptLanguage) {
21                $locales = LanguageParser::parseLanguageHeader($acceptLanguage);
22                if (!empty($locales)) {
23                    $context = $context->withContext(ContextConstants::ACCEPT_LOCALE, $locales[0]);
24                    $context = $context->withContext(ContextConstants::ACCEPTED_LOCALES, $locales);
25                }
26            }
27
28            $contentLanguage = $request->getHeaderLine('Content-Language');
29            if ($contentLanguage) {
30                $locales = LanguageParser::parseLanguageHeader($contentLanguage);
31                if (!empty($locales)) {
32                    $context = $context->withContext(ContextConstants::LOCALE, $locales[0]);
33                    $context = $context->withContext(ContextConstants::DATA_LOCALE, $locales[0]);
34                }
35            }
36        }
37        return $context;
38    }
39}