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1 efrain 1 
<?php declare(strict_types=1);
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namespace EduSharingApiClient;
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/**
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 * Class EduSharingHelperAbstract
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 *
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 * @author Torsten Simon  <simon@edu-sharing.net>
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 */
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abstract class EduSharingHelperAbstract
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{
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    public EduSharingHelperBase $base;
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    /**
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     * EduSharingHelperAbstract constructor
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     *
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     * @param EduSharingHelperBase $base
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     */
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    public function __construct(EduSharingHelperBase $base) {
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        $this->base = $base;
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    }
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    /**
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     * Function getRESTAuthenticationHeader
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     *
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     * Generates the header to use for a given ticket to authenticate with any edu-sharing api endpoint
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     * @param string $ticket
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     * The ticket, obtained by @getTicketForUser
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     * @return string
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     */
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    public function getRESTAuthenticationHeader(string $ticket): string {
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        return 'Authorization: EDU-TICKET ' . $ticket;
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    }
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    /**
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     * Function getSignatureHeaders
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     *
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     * @param string $signString
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     * @param string $accept
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     * @param string $contentType
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     * @return string[]
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     */
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    protected function getSignatureHeaders(string $signString, string $accept = 'application/json', string $contentType = 'application/json'): array {
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        $ts        = time() * 1000;
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        $toSign    = $this->base->appId . $signString . $ts;
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        $signature = $this->sign($toSign);
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        return [
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            'Accept: ' . $accept,
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            'Content-Type: ' . $contentType,
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            'X-Edu-App-Id: ' . $this->base->appId,
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            'X-Edu-App-Signed: ' . $toSign,
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            'X-Edu-App-Sig: ' . $signature,
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            'X-Edu-App-Ts: ' . $ts,
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        ];
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    }
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    /**
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     * Function sign
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     *
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     * @param string $toSign
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     * @return string
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     */
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    protected function sign(string $toSign): string {
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        return $this->base->sign($toSign);
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    }
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}