Config.php

<?php

declare(strict_types=1);

namespace OpenFeature\Providers\GoFeatureFlag\config;

use Psr\Http\Client\ClientInterface;

class Config
{
    private string $endpoint;
    /**
     * @var array<string, string>
     */
    private array $customHeaders = [];

    /**
     * @var ClientInterface|null - The HTTP Client to use (if you want to use a custom one)
     */
    private ?ClientInterface $httpclient;

    /**
     * @var array<string, mixed> exporterMetadata - is the metadata we send to the GO Feature Flag relay proxy when we report
     * the evaluation data usage.
     *
     * ‼️Important: If you are using a GO Feature Flag relay proxy before version v1.41.0, the information of this
     * field will not be added to your feature events.
     */
    private array $exporterMetadata = [];

    /**
     * @param string $endpoint - The endpoint to your GO Feature Flag Instance
     * @param string|null $apiKey - API Key to use to connect to GO Feature Flag
     * @param array<string, string>|null $customHeaders - Custom headers you want to send
     * @param array<string, mixed>|null $exporterMetadata - Metadata to send to the relay proxy during evaluation data collection
     * @param ClientInterface|null $httpclient - The HTTP Client to use (if you want to use a custom one)
     */
    public function __construct(
        string $endpoint,
        ?string $apiKey = '',
        ?array $customHeaders = [],
        ?array $exporterMetadata = [],
        ?ClientInterface $httpclient = null,
    ) {
        $this->httpclient = $httpclient;
        $this->endpoint = $endpoint;
        $this->customHeaders = $customHeaders ?? [];

        // set default exporter metadata fields
        $this->exporterMetadata = $exporterMetadata ?? [];
        $this->exporterMetadata['openfeature'] = true;
        $this->exporterMetadata['provider'] = 'php';

        if ($apiKey !== null && $apiKey !== '') {
            $this->customHeaders['Authorization'] = 'Bearer ' . $apiKey;
        }
    }

    public function getEndpoint(): string
    {
        return $this->endpoint;
    }

    /**
     * @return array<string, string>
     */
    public function getCustomHeaders(): array
    {
        return $this->customHeaders;
    }

    public function addCustomHeader(string $key, string $value): void
    {
        $this->customHeaders[$key] = $value;
    }

    public function getHttpClient(): ?ClientInterface
    {
        return $this->httpclient;
    }

    /**
     * @return array<string, mixed>
     */
    public function getExporterMetadata(): array
    {
        return $this->exporterMetadata;
    }
}