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eslint-disable import/newline-after-import, import/first */\n\n//region 1. Platform Libraries\nimport express from 'express';\nimport moment from 'moment';\nimport MongoClient from 'mongodb';\nimport os from 'os';\nconst requireAll = require('require-all');\nimport winston from 'winston';\nimport 'winston-daily-rotate-file';\nimport 'winston-loggly-bulk';\n//endregion\n\n//region 2. Project Libraries\nimport LogLevel from './LogLevel';\n//endregion\n\n//region K. Constants\nconst context = {\n heartbeatInterval: null,\n logger: null,\n routers: null,\n};\n//endregion\n\n//region B. Business Helpers\nconst timestamp = () => moment().format('YYYY-MM-DDTHH:mm:ss.SSSZ');\n\nconst formatter = (options) => {\n const timestampPart = `${options.timestamp()} `;\n const levelPart = `${options.level.toUpperCase()}: `;\n const tagPart = options.meta.tags ? `${options.meta.tags}> ` : '';\n const messagePart = options.message || '';\n return `${timestampPart}${levelPart}${tagPart}${messagePart}`;\n};\n\ncontext.logger = (function setupDefaultLogger() {\n const transports = [\n new winston.transports.Console({\n formatter,\n timestamp,\n }),\n new winston.transports.DailyRotateFile({\n datePattern: '.yyyy-MM-dd',\n filename: `${process.cwd()}/data-api.log`,\n formatter,\n maxFiles: 7,\n timestamp,\n }),\n ];\n return new winston.Logger({ transports });\n}());\n\nfunction setupLogger(logLevel, logglySubdomain, logglyToken) {\n this.logLevel = LogLevel[logLevel && logLevel.toUpperCase()] || LogLevel.DEBUG;\n const transports = [\n new winston.transports.Console({\n formatter,\n timestamp,\n }),\n new winston.transports.DailyRotateFile({\n datePattern: '.yyyy-MM-dd',\n filename: `${process.cwd()}/data-api.log`,\n formatter,\n json: false,\n maxFiles: 7,\n timestamp,\n }),\n ];\n if (logglySubdomain && logglySubdomain !== 'null'\n && logglyToken && logglyToken !== 'null') {\n const tags = [\n 'data-api',\n os.hostname,\n ];\n if (this.environment) {\n tags.push(this.environment);\n }\n transports.push(new winston.transports.Loggly({\n formatter,\n json: true,\n level: this.logLevel.name.toLowerCase(),\n subdomain: logglySubdomain,\n tags,\n timestamp,\n token: logglyToken,\n }));\n }\n context.logger.configure({\n level: this.logLevel.name.toLowerCase(),\n transports,\n });\n}\n//endregion\n\n//region E. Exports\n/**\n * Class representing a Data-API\n */\nexport default class DataAPI {\n constructor() {\n this.expressApp = express();\n }\n\n /**\n * Initialize Data-API with options\n * @param {object} [options] Options\n * @param {string} [options.environment] Environment Tag\n * @param {number} [options.heartbeatInterval=10] Heartbeat Interval (s)\n * @param {string} [options.logglySubdomain] Loggly Subdomain\n * @param {string} [options.logglyToken] Loggly Token\n * @param {string} [options.logLevel=DEBUG] Log Level\n * @param {string} [options.mongoUrl=mongodb://localhost] MongoDB Connection URL\n * @param {number} [options.port=15925] Data-API Port\n */\n initialize(options) {\n const opts = options || {};\n this.environment = opts.environment || '';\n setupLogger.bind(this)(opts.logLevel, opts.logglySubdomain, opts.logglyToken);\n const log = (lvl, msg) => context.logger.log(lvl, msg, { tags: 'initialize' });\n log('debug', 'Initializing....');\n if (opts.heartbeatInterval === 0) {\n log('error', `Invalid Heartbeat Interval ${opts.heartbeatInterval}`);\n return false;\n }\n if (opts.mongoUrl && opts.mongoUrl.substring(0, 10) !== 'mongodb://') {\n log('error', `Invalid MongoDB Connection URL ${opts.mongoUrl}`);\n return false;\n }\n if (opts.port < 1 || opts.port > 65535) {\n log('error', `Port Number Range Exceeded ${opts.port}`);\n return false;\n }\n context.heartbeatInterval = opts.heartbeatInterval || 10;\n this.mongoUrl = opts.mongoUrl || 'mongodb://localhost';\n this.port = opts.port || 15925;\n log('info', 'Initialized');\n return true;\n }\n\n start(callback) {\n const log = (lvl, msg) => context.logger.log(lvl, msg, { tags: 'start' });\n log('debug', 'Checking existing database connection....');\n if (this.database) {\n log('error', 'Data API has already been started. Start aborted.');\n return false;\n }\n log('debug', 'Connecting to database....');\n MongoClient.connect(this.mongoUrl, (connectErr, connectedDB) => {\n if (connectErr) {\n log('error', connectErr.message);\n return;\n }\n log('info', 'Database Connected');\n this.database = connectedDB;\n log('debug', 'Mounting routers....');\n context.routers = requireAll({\n dirname: `${__dirname}/routers`,\n filter: /^((?!spec).)+\\.js$/,\n map(name, path) {\n const filename = path.substring(\n path.lastIndexOf('/') + 1,\n path.lastIndexOf('.'),\n );\n return name.length === 1 ? filename : name;\n },\n });\n log('debug', Object.keys(context.routers));\n Object.keys(context.routers).forEach((router) => {\n context.routers[router].default({\n app: this.expressApp,\n database: this.database,\n logger: context.logger,\n });\n });\n log('info', 'Routers Mounted');\n log('debug', 'Launching Data API....');\n this.expressServer = this.expressApp.listen(this.port, (listenErr) => {\n if (listenErr) {\n log('error', listenErr.message);\n return;\n }\n log('info', `Data API listening on port ${this.port}`);\n if (callback) {\n callback();\n }\n });\n });\n return true;\n }\n\n stop(callback) {\n const log = (lvl, msg) => context.logger.log(lvl, msg, { tags: 'stop' });\n log('debug', 'Stopping Data API....');\n if (!this.expressServer) {\n log('info', 'Express Server Already Closed');\n if (callback) {\n callback();\n }\n return;\n }\n this.expressServer.close(() => {\n log('info', 'Express Server Closed');\n this.expressServer = null;\n if (!this.database) {\n if (callback) {\n callback();\n }\n return;\n }\n this.database.close(() => {\n log('info', 'Database Closed');\n this.database = null;\n if (callback) {\n callback();\n }\n });\n });\n }\n\n static get heartbeatInterval() {\n return context.heartbeatInterval;\n }\n}\n\nexport const logger = context.logger;\n//endregion\n"]} |