Refactor configuration

- No longer use config npm package
- Prefer config from env vars, though still has support for config file
- No longer writes a config file for database config
- Writes keys to a new file in /data folder
- Removes a lot of cruft and improves config understanding

backend/lib/config.js

@@ -0,0 +1,181 @@
+const fs      = require('fs');
+const NodeRSA = require('node-rsa');
+const { config } = require('process');
+const logger  = require('../logger').global;
+
+const keysFile = '/data/keys.json';
+
+let instance = null;
+
+// 1. Load from config file first (not recommended anymore)
+// 2. Use config env variables next
+const configure = () => {
+	const filename = (process.env.NODE_CONFIG_DIR || './config') + '/' + (process.env.NODE_ENV || 'default') + '.json';
+	if (fs.existsSync(filename)) {
+		let configData;
+		try {
+			configData = require(filename);
+		} catch (err) {
+			// do nothing
+		}
+		if (configData?.database && configData?.database?.engine) {
+			logger.info(`Using configuration from file: ${filename}`);
+			instance = configData;
+			return;
+		}
+	}
+
+	const envMysqlHost = process.env.DB_MYSQL_HOST || null;
+	const envMysqlUser = process.env.DB_MYSQL_USER || null;
+	const envMysqlName = process.env.DB_MYSQL_NAME || null;
+	if (envMysqlHost && envMysqlUser && envMysqlName) {
+		// we have enough mysql creds to go with mysql
+		logger.info('Using MySQL configuration');
+		instance = {
+			database: {
+				engine:   'mysql',
+				host:     envMysqlHost,
+				port:     process.env.DB_MYSQL_PORT || 3306,
+				user:     envMysqlUser,
+				password: process.env.DB_MYSQL_PASSWORD,
+				name:     envMysqlName,
+			}
+		};
+		return;
+	}
+
+	const envSqliteFile = process.env.DB_SQLITE_FILE || '/data/database.sqlite';
+	logger.info(`Using Sqlite: ${envSqliteFile}`);
+	instance = {
+		database: {
+			engine:  'knex-native',
+			knex:    {
+				client:     'sqlite3',
+				connection: {
+					filename: envSqliteFile
+				},
+				useNullAsDefault: true
+			}
+		}
+	};
+
+	// Get keys from file
+	if (!fs.existsSync(keysFile)) {
+		generateKeys();
+	} else if (!!process.env.DEBUG) {
+		logger.info('Keys file exists OK');
+	}
+	try {
+		instance.keys = require(keysFile);
+	} catch (err) {
+		logger.error('Could not read JWT key pair from config file: ' + keysFile, err);
+		process.exit(1);
+	}
+
+	logger.debug('Configuration: ' + JSON.stringify(instance, null, 2));
+};
+
+const generateKeys = () => {
+	logger.info('Creating a new JWT key pair...');
+	// Now create the keys and save them in the config.
+	const key = new NodeRSA({ b: 2048 });
+	key.generateKeyPair();
+
+	const keys = {
+		key: key.exportKey('private').toString(),
+		pub: key.exportKey('public').toString(),
+	};
+
+	// Write keys config
+	try {
+		fs.writeFileSync(keysFile, JSON.stringify(keys, null, 2));
+	} catch (err) {
+		logger.error('Could not write JWT key pair to config file: ' + keysFile + ': ' . err.message);
+		process.exit(1);
+	}
+	logger.info('Wrote JWT key pair to config file: ' + keysFile);
+};
+
+module.exports = {
+
+	/**
+	 *
+	 * @param   {string}  key   ie: 'database' or 'database.engine'
+	 * @returns {boolean}
+	 */
+	has: function(key) {
+		instance === null && configure();
+		const keys = key.split('.');
+		let level = instance;
+		let has = true;
+		keys.forEach((keyItem) =>{
+			if (typeof level[keyItem] === 'undefined') {
+				has = false;
+			} else {
+				level = level[keyItem];
+			}
+		});
+
+		return has;
+	},
+
+	/**
+	 * Gets a specific key from the top level
+	 *
+	 * @param {string} key
+	 * @returns {*}
+	 */
+	get: function (key) {
+		instance === null && configure();
+		if (key && typeof instance[key] !== 'undefined') {
+			return instance[key];
+		}
+		return instance;
+	},
+
+	/**
+	 * Is this a sqlite configuration?
+	 *
+	 * @returns {boolean}
+	 */
+	isSqlite: function () {
+		instance === null && configure();
+		return instance.database?.knex && instance.database?.knex?.client === 'sqlite3';
+	},
+
+	/**
+	 * Are we running in debug mdoe?
+	 *
+	 * @returns {boolean}
+	 */
+	debug: function () {
+		return !!process.env.DEBUG;
+	},
+
+	/**
+	 * Returns a public key
+	 *
+	 * @returns {string}
+	 */
+	getPublicKey: function () {
+		instance === null && configure();
+		return instance?.keys?.pub
+	},
+
+	/**
+	 * Returns a private key
+	 *
+	 * @returns {string}
+	 */
+	getPrivateKey: function () {
+		instance === null && configure();
+		return instance?.keys?.key;
+	},
+
+	/**
+	 * @returns {boolean}
+	 */
+	useLetsencryptStaging: function () {
+		return !!process.env.LE_STAGING;
+	}
+};

backend/lib/validator/index.js

@@ -5,7 +5,7 @@ const definitions = require('../../schema/definitions.json');
 RegExp.prototype.toJSON = RegExp.prototype.toString;
 
 const ajv = require('ajv')({
-	verbose:     true, //process.env.NODE_ENV === 'development',
+	verbose:     true,
 	allErrors:   true,
 	format:      'full',  // strict regexes for format checks
 	coerceTypes: true,