misc.js

/*******************************************************************************
 * 
 * 
 * (c) Copyright Merative US L.P. and others 2020-2022 
 *
 * SPDX-Licence-Identifier: Apache 2.0
 * 
 *******************************************************************************/

var fs = require('fs');
var path = require('path');

module.exports = function (logger) {
	var misc = {};
	let creds_path = null;

	// Check if blockchain creds files is okay
	misc.check_creds_for_valid_json = function (cb) {
		if (!process.env.creds_filename) {
			process.env.creds_filename = 'config_tls.json';				//default to a file
		}

		var config_path = path.join(__dirname, '../config/' + process.env.creds_filename);
		try {
			let configFile = require(config_path);
			creds_path = path.join(__dirname, '../config/' + configFile.cred_filename);
			let creds = require(creds_path);
			if (creds.name) {
				logger.info('Checking credentials file is done');
				return null;
			} else {
				throw 'missing network id';
			}
		} catch (e) {
			logger.error('---------------------------------------------------------------');
			logger.error('----------------------------- Bah -----------------------------');
			logger.error('------------- The credentials file is malformed ---------------');
			logger.error('---------------------------------------------------------------');
			logger.error('Fix this file: ' + creds_path);
			logger.warn('It must be valid JSON.  You may have dropped a comma or added one too many.');
			logger.warn('----------------------------------------------------------------------');
			logger.error(e);
			process.exit();									//all stop
		}
	};

	// Real simple hash
	misc.simple_hash = function (a_string) {
		var hash = 0;
		for (var i in a_string) hash ^= a_string.charCodeAt(i);
		return hash;
	};

	// Sanitize marble owner names
	misc.saferNames = function (usernames) {
		var ret = [];
		for (var i in usernames) {
			var name = usernames[i].replace(/\W+/g, '');					//names should not contain many things...
			if (name !== '') ret.push(name.toLowerCase());
		}
		return ret;
	};

	// Delete a folder
	misc.rmdir = function (dir_path) {
		if (fs.existsSync(dir_path)) {
			fs.readdirSync(dir_path).forEach(function (entry) {
				var entry_path = path.join(dir_path, entry);
				if (fs.lstatSync(entry_path).isDirectory()) {
					misc.rmdir(entry_path);
				}
				else {
					fs.unlinkSync(entry_path);
				}
			});
			fs.rmdirSync(dir_path);
		}
	};

	return misc;
};