overleaf/services/filestore/app/js/PersistorManager.js

// TODO: This file was created by bulk-decaffeinate.
// Sanity-check the conversion and remove this comment.
/*
 * decaffeinate suggestions:
 * DS103: Rewrite code to no longer use __guard__
 * DS205: Consider reworking code to avoid use of IIFEs
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const settings = require("settings-sharelatex");
const logger = require("logger-sharelatex");

// assume s3 if none specified
__guard__(settings != null ? settings.filestore : undefined, x => x.backend || (settings.filestore.backend = "s3"));

logger.log({backend:__guard__(settings != null ? settings.filestore : undefined, x1 => x1.backend)}, "Loading backend");
module.exports = (() => { switch (__guard__(settings != null ? settings.filestore : undefined, x2 => x2.backend)) {
	case "aws-sdk":
		return require("./AWSSDKPersistorManager");
	case "s3":
		return require("./S3PersistorManager");
	case "fs":
		return require("./FSPersistorManager");
	default:
		throw new Error( `Unknown filestore backend: ${settings.filestore.backend}` );
} })();

function __guard__(value, transform) {
  return (typeof value !== 'undefined' && value !== null) ? transform(value) : undefined;
}