<?php
/**
 * ApiException
 * PHP version 5
 *
 * @category Class
 * @package  USPS\InternationalPrices
 * @author   Swagger Codegen team
 * @link     https://github.com/swagger-api/swagger-codegen
 */

/**
 * International Prices
 *
 * Contact Us: [USPS API Support](https://emailus.usps.com/s/usps-APIs) | [Terms of Service](https://about.usps.com/termsofuse.htm)  The International Prices API allows users to retrieve International postage rates for packages by: * Look up International Base Postage based on a set of given package characteristics * Look up International Base Postage based on a given SKU  The USPS&#174; has implemented Stock Keeping Units (SKUs) which provide unique identification for their products. These SKUs are available for download online for mailers.   For further details on package specifications, delivery information, and more, please consult the [International Mail Manual. (IMM)](https://pe.usps.com/text/imm/welcome.htm). For a list of published rates please refer to the [USPS Price List](https://pe.usps.com/text/dmm300/Notice123.htm) To discover the rate ingredients for this API, take a look at [Publication 205](http://postalpro.usps.com/pub205).    **Authentication, Authorization and Access Control**      Client applications are given authorized access to protected information resources. Authorization is accomplished via the USPS&#174; Customer Onboarding Platform, where Customer Registration users may grant applications access to their protected business information. All client applications must go through this onboarding process. Any Customer Registration user wishing to share their protected business information with client application(s) may also grant authorized access.  The OAuth2, version 3 (/v3), API is based on this authorization grant and must be used to get tokens for all V3 APIs. * The resulting OAuth2 access token is to be placed in the **Authorization** header, using the **Bearer** authentication scheme. * All version 3 APIs validate access to protected information resources and will respond with a *401* HTTP status, *Unauthorized* reason, when the client application has not been authorized to access the given information resource.  The following APIs may include payment account or permit identification used to get contract rates.
 *
 * OpenAPI spec version: 3.3.10
 * 
 * Generated by: https://github.com/swagger-api/swagger-codegen.git
 * Swagger Codegen version: 3.0.71
 */
/**
 * NOTE: This class is auto generated by the swagger code generator program.
 * https://github.com/swagger-api/swagger-codegen
 * Do not edit the class manually.
 */

namespace USPS\InternationalPrices;

use \Exception;

/**
 * ApiException Class Doc Comment
 *
 * @category Class
 * @package  USPS\InternationalPrices
 * @author   Swagger Codegen team
 * @link     https://github.com/swagger-api/swagger-codegen
 */
class HeaderSelector
{

    /**
     * @param string[] $accept
     * @param string[] $contentTypes
     * @return array
     */
    public function selectHeaders($accept, $contentTypes)
    {
        $headers = [];

        $accept = $this->selectAcceptHeader($accept);
        if ($accept !== null) {
            $headers['Accept'] = $accept;
        }

        $headers['Content-Type'] = $this->selectContentTypeHeader($contentTypes);
        return $headers;
    }

    /**
     * @param string[] $accept
     * @return array
     */
    public function selectHeadersForMultipart($accept)
    {
        $headers = $this->selectHeaders($accept, []);

        unset($headers['Content-Type']);
        return $headers;
    }

    /**
     * Return the header 'Accept' based on an array of Accept provided
     *
     * @param string[] $accept Array of header
     *
     * @return string Accept (e.g. application/json)
     */
    private function selectAcceptHeader($accept)
    {
        if (count($accept) === 0 || (count($accept) === 1 && $accept[0] === '')) {
            return null;
        } elseif (preg_grep("/application\/json/i", $accept)) {
            return 'application/json';
        } else {
            return implode(',', $accept);
        }
    }

    /**
     * Return the content type based on an array of content-type provided
     *
     * @param string[] $contentType Array fo content-type
     *
     * @return string Content-Type (e.g. application/json)
     */
    private function selectContentTypeHeader($contentType)
    {
        if (count($contentType) === 0 || (count($contentType) === 1 && $contentType[0] === '')) {
            return 'application/json';
        } elseif (preg_grep("/application\/json/i", $contentType)) {
            return 'application/json';
        } else {
            return implode(',', $contentType);
        }
    }
}
