<?php
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

// snippet-start:[cloudfront.php.deletedistribution.complete]
// snippet-start:[cloudfront.php.deletedistribution.import]
require 'vendor/autoload.php';

use Aws\Exception\AwsException;

// snippet-end:[cloudfront.php.deletedistribution.import]

/* ////////////////////////////////////////////////////////////////////////////
 * Purpose: Deletes an Amazon CloudFront distribution.
 *
 * Prerequisites: An existing Amazon CloudFront distribution. The
 * distribution must be disabled first.
 *
 * Inputs:
 * - $cloudFrontClient: An initialized AWS SDK for PHP SDK client
 *   for CloudFront.
 * - $distributionId: The distribution's ID.
 * - $eTag: The ETag header value for the distribution. This value comes from
 *   the companion getDistributionETag function.
 *
 * Returns: Information about the deletion request; otherwise,
 * the error message.
 * ///////////////////////////////////////////////////////////////////////// */

// snippet-start:[cloudfront.php.deletedistribution.main]
function deleteDistribution($cloudFrontClient, $distributionId, $eTag)
{
    try {
        $result = $cloudFrontClient->deleteDistribution([
            'Id' => $distributionId,
            'IfMatch' => $eTag
        ]);
        return 'The distribution at the following effective URI has ' .
            'been deleted: ' . $result['@metadata']['effectiveUri'];
    } catch (AwsException $e) {
        return 'Error: ' . $e->getAwsErrorMessage();
    }
}

function getDistributionETag($cloudFrontClient, $distributionId)
{
    try {
        $result = $cloudFrontClient->getDistribution([
            'Id' => $distributionId,
        ]);

        if (isset($result['ETag'])) {
            return [
                'ETag' => $result['ETag'],
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        } else {
            return [
                'Error' => 'Error: Cannot find distribution ETag header value.',
                'effectiveUri' => $result['@metadata']['effectiveUri']
            ];
        }
    } catch (AwsException $e) {
        return [
            'Error' => 'Error: ' . $e->getAwsErrorMessage()
        ];
    }
}

function deleteADistribution()
{
    $distributionId = 'E17G7YNEXAMPLE';

    $cloudFrontClient = new Aws\CloudFront\CloudFrontClient([
        'profile' => 'default',
        'version' => '2018-06-18',
        'region' => 'us-east-1'
    ]);

    // To delete a distribution, you must first get the distribution's
    // ETag header value.
    $eTag = getDistributionETag($cloudFrontClient, $distributionId);

    if (array_key_exists('Error', $eTag)) {
        exit($eTag['Error']);
    } else {
        echo deleteDistribution(
            $cloudFrontClient,
            $distributionId,
            $eTag['ETag']
        );
    }
}

// Uncomment the following line to run this code in an AWS account.
// deleteADistribution();
// snippet-end:[cloudfront.php.deletedistribution.main]
// snippet-end:[cloudfront.php.deletedistribution.complete]
// snippet-sourceauthor:[pccornel (AWS)]