AS3CF - Upload all missing media library items to S3

as3cf-upload-missing-media-library-items-to-s3.php

<?php
/**
 * For use with Amazon S3 and CloudFront by Delicious Brains 
 * 
 * Upload this file to your installation and trigger it with WP-CLI:
 * wp eval-file as3cf-upload-missing-media-library-items-to-s3.php
 */

global $as3cf;

if (! $as3cf instanceof Amazon_S3_And_CloudFront) {
    return;
}

/**
 * Run the operation in a closure for ecapsulation.
 */
call_user_func(static function ($as3cf) {
    /**
     * Get all attachment ids that have no amazon S3 meta data.
     * 
     * @param  int $chunk  Maximum number of attachments to return.
     * 
     * @return array attachment_ids
     */
    $get_attachment_ids_not_on_s3 = function ($chunk) {
        return (array) get_posts([
            'post_type'  => 'attachment',
            'meta_query' => [
                'relation' => 'AND',
                [
                    'key'       => 'amazonS3_info',
                    'compare'   => 'NOT EXISTS',
                ],
                [
                    'key'       => 'amazonS3_upload_error',
                    'compare'   => 'NOT EXISTS',
                ]
            ],
            'posts_per_page' => (int) $chunk,
            'fields'         => 'ids',
        ]);
    };

    $uploaded = 0;
    $total = 0;

    while ($attachment_ids = $get_attachment_ids_not_on_s3(100)) :
        WP_CLI::line('Uploading ' . count($attachment_ids) . ' attachments to S3...');

        foreach ($attachment_ids as $attach_id) {
            $result = $as3cf->upload_attachment_to_s3($attach_id);
            
            // Prevent infinite recursion if upload fails.
            if (is_wp_error($result)) {
                update_post_meta($attach_id, 'amazonS3_upload_error', $result->get_error_message());
                WP_CLI::warning($attach_id . ' - ' . $result->get_error_message());
            } else {
                $uploaded++;
                WP_CLI::success($attach_id . ' - ' . json_encode($result));
            }

            $total++;
        }
    endwhile;

    WP_CLI::line("Process Complete. Uploaded $uploaded/$total attachments to S3.");
}, $as3cf);