largefs-config.php

<?php
/*
Plugin Name: WPEngine LargeFS Bucket Creation
Plugin URI:   https://github.com/jayhill90
Description:  A plugin designed for creating an S3 bucket for use with WP Engine's LargeFS system
Version:      0.1.0
Author:       Jay Hill
Author URI:   https://github.com/jayhill90/
License:
*/

require 'vendor/autoload.php';

// Hook Into Wordpress and call largefs_menu function
add_action( 'admin_menu', 'largefs_menu' );
// Add's the option page into Settings section of wp-admin
function largefs_menu() {
  add_options_page( 'LargeFS Options', 'LargeFS Config', 'manage_options', 'largefs-config', 'largefs_options' );
}

function makeBucket() {

  // Grab the bucket policy and replace bucket name.
  if ( isset($_REQUEST['s3_bucket_name'] ) ) {
    $policy = file_get_contents( plugin_dir_path(__DIR__) . "largefs-config/inc/bucket_policy.json" );
    $bucket_policy = str_replace( '{bucketName}', $_REQUEST['s3_bucket_name'], $policy );
  }

  // If we've got the keys time to do the needful
  if ( isset( $_REQUEST[ 's3_access_key' ] ) && isset( $_REQUEST[ 's3_secret_key' ] ) ) {
    // Args to pass into S3 for region and credentials. This assumes the admin
    // has generated credentials using an IAM user.
    $args = [
      'version' => 'latest',
      'region' => 'us-east-1',
      'credentials' => [
        'key' => $_REQUEST['s3_access_key'], 'secret' => $_REQUEST['s3_secret_key']
      ],
  ];
    $s3 = new Aws\S3\S3Client($args); //Make our s3 client connection
    // Create the Bucket & enable Static Hosting
    if( !$s3->doesBucketExist( $_REQUEST['s3_bucket_name'] ) ) {
     $s3->createBucket([
        'ACL' => 'public-read',
        'Bucket' => $_REQUEST['s3_bucket_name']
       ]);
     echo "Made bucket " . $_REQUEST['s3_bucket_name'] . "\n";
     echo "Please contact Support for the validation file to upload to the root of your bucket\n";
     echo "You can now uninstall this plugin.\n";
   }
   else {
     echo "Bucket exists already. Choose a different name.";
   }
   $s3->putBucketWebsite([
        'Bucket' => $_REQUEST['s3_bucket_name'],
        'ContentMD5' => '',
        'WebsiteConfiguration' => [
          'ErrorDocument' => [ 'Key' => 'error.html' ],
          'IndexDocument' => [ 'Suffix' => 'index.html' ]
        ]
      ]);
    // Setup Bucket Policy per https://wpengine.com/support/configuring-largefs-store-transfer-unlimited-data/
    $s3 ->putBucketPolicy([
      'Bucket' => $_REQUEST['s3_bucket_name'],
      'ConfirmRemoveSelfBucketAccess' => false,
      'Policy' => $bucket_policy,
    ]);
  }
}

// Renders out Options Page.
function largefs_options() {
  add_action( 'largefs_config' , 'makeBucket' );
  if (!current_user_can( 'manage_options' )) {
    wp_die(__( "You don't have access." ));
  }?>
  <div class="wrap">
  <h1>LargeFS Configuration</h1>
  <p>Please enter your S3 Access Key and Secret Key and ensure you are not using your root user for AWS' keys.<br>
    If you need help setting up an IAM User to utilize for this see the AWS Documentation <a href="https://docs.aws.amazon.com/IAM/latest/UserGuide/id_users_create.html" target="_blank">here</a><br />
    Once you click save, an S3 bucket will be created, static website hosting enabled, and your bucket policy configured.</p>
  <form method="post" action="<?php esc_url( admin_url( 'admin-post.php' ) ); ?>">
  Bucket Name:
  <input type="text" name="s3_bucket_name" value="" /><br/>
  Access Key:
  <input type="text" name="s3_access_key" value="" /><br/>
  Secret Key:
  <input type="password" name="s3_secret_key" value="" /><br />
  <?php submit_button( 'Make Bucket' ); ?>
  </form>
  <?php do_action( 'largefs_config' ); ?>
</div><?php
}
?>