const moment = require('moment'); const { _ } = require('lib/locale.js'); const { time } = require('lib/time-utils.js'); const { FsDriverDummy } = require('lib/fs-driver-dummy.js'); class Logger { constructor() { this.targets_ = []; this.level_ = Logger.LEVEL_ERROR; this.fileAppendQueue_ = [] this.lastDbCleanup_ = time.unixMs(); } static fsDriver() { if (!Logger.fsDriver_) Logger.fsDriver_ = new FsDriverDummy(); return Logger.fsDriver_; } setLevel(level) { this.level_ = level; } level() { return this.level_; } clearTargets() { this.targets_.clear(); } addTarget(type, options = null) { let target = { type: type }; for (let n in options) { if (!options.hasOwnProperty(n)) continue; target[n] = options[n]; } this.targets_.push(target); } objectToString(object) { let output = ''; if (typeof object === 'object') { if (object instanceof Error) { output = object.toString(); if (object.code) output += "\nCode: " + object.code; if (object.headers) output += "\nHeader: " + JSON.stringify(object.headers); if (object.request) output += "\nRequest: " + object.request; if (object.stack) output += "\n" + object.stack; } else { output = JSON.stringify(object); } } else { output = object; } return output; } objectsToString(...object) { let output = []; for (let i = 0; i < object.length; i++) { output.push('"' + this.objectToString(object[i]) + '"'); } return output.join(', '); } static databaseCreateTableSql() { let output = ` CREATE TABLE IF NOT EXISTS logs ( id INTEGER PRIMARY KEY, source TEXT, level INT NOT NULL, message TEXT NOT NULL, \`timestamp\` INT NOT NULL ); `; return output.split("\n").join(' '); } // Only for database at the moment async lastEntries(limit = 100) { for (let i = 0; i < this.targets_.length; i++) { const target = this.targets_[i]; if (target.type == 'database') { return await target.database.selectAll('SELECT * FROM logs ORDER BY timestamp DESC LIMIT ' + limit); } } return []; } log(level, ...object) { if (this.level() < level || !this.targets_.length) return; let levelString = ''; let line = moment().format('YYYY-MM-DD HH:mm:ss') + ': '; if (level == Logger.LEVEL_WARN) levelString += '[warn] '; if (level == Logger.LEVEL_ERROR) levelString += '[error] '; for (let i = 0; i < this.targets_.length; i++) { let target = this.targets_[i]; if (target.type == 'console') { let fn = 'log'; if (level == Logger.LEVEL_ERROR) fn = 'error'; if (level == Logger.LEVEL_WARN) fn = 'warn'; if (level == Logger.LEVEL_INFO) fn = 'info'; console[fn](line + this.objectsToString(...object)); } else if (target.type == 'file') { let serializedObject = this.objectsToString(...object); Logger.fsDriver().appendFileSync(target.path, line + serializedObject + "\n"); } else if (target.type == 'database') { let msg = this.objectsToString(...object); let queries = [{ sql: 'INSERT INTO logs (`source`, `level`, `message`, `timestamp`) VALUES (?, ?, ?, ?)', params: [target.source, level, msg, time.unixMs()], }]; const now = time.unixMs(); if (now - this.lastDbCleanup_ > 1000 * 60 * 60) { this.lastDbCleanup_ = now; const dayKeep = 14; queries.push({ sql: 'DELETE FROM logs WHERE `timestamp` < ?', params: [now - 1000 * 60 * 60 * 24 * dayKeep], }); } target.database.transactionExecBatch(queries); } } } error(...object) { return this.log(Logger.LEVEL_ERROR, ...object); } warn(...object) { return this.log(Logger.LEVEL_WARN, ...object); } info(...object) { return this.log(Logger.LEVEL_INFO, ...object); } debug(...object) { return this.log(Logger.LEVEL_DEBUG, ...object); } static levelStringToId(s) { if (s == 'none') return Logger.LEVEL_NONE; if (s == 'error') return Logger.LEVEL_ERROR; if (s == 'warn') return Logger.LEVEL_WARN; if (s == 'info') return Logger.LEVEL_INFO; if (s == 'debug') return Logger.LEVEL_DEBUG; throw new Error(_('Unknown log level: %s', s)); } static levelIdToString(id) { if (id == Logger.LEVEL_NONE) return 'none'; if (id == Logger.LEVEL_ERROR) return 'error'; if (id == Logger.LEVEL_WARN) return 'warn'; if (id == Logger.LEVEL_INFO) return 'info'; if (id == Logger.LEVEL_DEBUG) return 'debug'; throw new Error(_('Unknown level ID: %s', id)); } static levelIds() { return [Logger.LEVEL_NONE, Logger.LEVEL_ERROR, Logger.LEVEL_WARN, Logger.LEVEL_INFO, Logger.LEVEL_DEBUG]; } static levelEnum() { let output = {}; const ids = this.levelIds(); for (let i = 0; i < ids.length; i++) { output[ids[i]] = this.levelIdToString(ids[i]); } return output; } } Logger.LEVEL_NONE = 0; Logger.LEVEL_ERROR = 10; Logger.LEVEL_WARN = 20; Logger.LEVEL_INFO = 30; Logger.LEVEL_DEBUG = 40; module.exports = { Logger };