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// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
/* eslint-disable prefer-rest-params */
import {EventEmitter} from 'events';
import {LogSeverity} from './LogSeverity';
import {LogEvent} from './LogEvent';
import {ILogEvent} from './ILogEvent';
import * as utils from 'util';
import {getInstance} from './instance';
import { IConfig } from './IConfig';
import { Application } from './Application';
import {Writable} from 'stream';
export class Logger extends EventEmitter {
private name: string;
private logLevel: LogSeverity;
private useStdErrForErrors: boolean;
private _filters: Array<RegExp>;
private _logStream: Writable;
private _errorStream: Writable;
public constructor(name: string = '', logLevel?: LogSeverity, useStdErrForErrors: boolean = false) {
super();
this.name = name;
this._logStream = this._getDefaultLogStream();
this._errorStream = this._getDefaultErrorStream();
this.logLevel = LogSeverity.DEBUG |
LogSeverity.INFO |
LogSeverity.WARNING |
LogSeverity.ERROR |
LogSeverity.FATAL;
if (logLevel) {
this.logLevel = logLevel;
}
this._filters = this._getDefaultLogFilters();
this.useStdErrForErrors = useStdErrForErrors;
}
protected _getDefaultLogStream(): Writable {
return process.stdout;
}
protected _getDefaultErrorStream(): Writable {
return process.stderr;
}
public setLogStream(writable: Writable) {
this._logStream = writable;
}
public setErrorStream(writable: Writable) {
this._errorStream = writable;
}
public getLogStream(): Writable {
return this._logStream;
}
public getErrorStream(): Writable {
return this._errorStream;
}
public getName(): string {
return this.name;
}
public addFilter(reg: RegExp): void {
this._filters.push(reg);
}
public removeFilter(reg: RegExp): void {
let index: number = this._filters.indexOf(reg);
Eif (index > -1) {
this._filters.splice(index, 1);
}
}
public setFilters(filters: Array<RegExp>): void {
if (filters) {
this._filters = filters.slice();
}
else {
this._filters = [];
}
}
public getFilters(): Array<RegExp> {
return this._filters.slice();
}
public loadFilters(): void {
let app: Application = getInstance();
let config: IConfig = null;
Eif (app) {
config = app.getConfig();
}
Iif (!config) {
this.trace('No config for logger... Using default log filters');
this.setFilters(this._getDefaultLogFilters());
return;
}
let filters: Array<RegExp> = null;
if (!config.log_filters || (config.log_filters && config.log_filters.length === 0)) {
filters = this._getDefaultLogFilters();
}
else {
filters = [];
for (let i: number = 0; i < config.log_filters.length; i++) {
let logFilter: string = config.log_filters[i];
filters.push(new RegExp(this._parseRegex(logFilter)));
}
}
this.setFilters(filters);
}
private _parseRegex(strReg: string): RegExp {
let malformError: Error = new Error('Malformed regex in log_filters');
Iif (strReg[0] !== '/') {
throw malformError;
}
let lastSlashIndex = strReg.lastIndexOf('/');
Iif (lastSlashIndex === strReg.indexOf('/')) {
throw malformError;
}
let reg: string = strReg.slice(1, lastSlashIndex);
let flags = strReg.slice(lastSlashIndex + 1);
return new RegExp(reg, flags);
}
protected _getDefaultLogFilters(): Array<RegExp> {
return [/TokenExpiredError/g];
}
public setLogLevel(severity: LogSeverity): void {
this.logLevel = severity;
}
public getLogLevel(): LogSeverity {
return this.logLevel;
}
protected _formatDate(now: Date): string {
return `${now.getFullYear()}/${now.getMonth() + 1}/${now.getDate()} - ${now.getHours()}:${now.getMinutes()}:${now.getSeconds()}`;
}
protected _formatString(messages: IArguments, severity: LogSeverity): string {
let sevText: string = '';
let str: string = '';
switch (severity) {
case LogSeverity.TRACE:
sevText = '[TRACE]';
break;
case LogSeverity.DEBUG:
sevText = '[DEBUG]';
break;
case LogSeverity.INFO:
sevText = '[INFO]';
break;
case LogSeverity.WARNING:
sevText = '[WARN]';
break;
case LogSeverity.ERROR:
sevText = '[ERROR]';
break;
case LogSeverity.FATAL:
sevText = '[FATAL]';
break;
case LogSeverity.DEPRECATE:
sevText = '[DEPRECATE]';
break;
default:
this.warn('Unknown Severity value used.');
break;
}
for (let i: number = 0; i < messages.length; i++) {
let msg: any = messages[i];
if (str.length !== 0) {
str += ' ';
}
if (typeof msg !== 'string') {
str += utils.inspect(msg);
}
else {
str += msg;
}
if (msg instanceof Error) {
str = msg.stack + '\n\n';
}
}
return `${sevText}[${this.name}][${this._formatDate(new Date())}] ${str}\n`;
}
protected _logMessages(messages: IArguments, severity: LogSeverity): void {
let msg: string = this._formatString(messages, severity);
this._logMessage(msg, severity);
}
protected _logMessage(msg: string, severity: LogSeverity): void {
Eif (this._shouldLog(msg, severity)) {
if ((severity & (LogSeverity.ERROR | LogSeverity.FATAL)) && this.useStdErrForErrors) {
this.getErrorStream().write(msg);
}
else {
this.getLogStream().write(msg);
}
}
}
protected _shouldLog(msg: string, severity: LogSeverity): boolean {
if (severity === LogSeverity.TRACE) {
return true;
}
for (let i: number = 0; i < this._filters.length; i++) {
let filter: RegExp = this._filters[i];
Iif (filter.test(msg)) {
return false;
}
}
return true;
}
protected log(messages: IArguments, severity: LogSeverity): void {
if (severity & this.getLogLevel()) {
this._logMessages(messages, severity);
let logData: ILogEvent = {
severity : severity,
messages : messages
};
this.emit(LogEvent.LOG, logData);
}
}
public trace(message: any): void {
this.log(arguments, LogSeverity.TRACE);
}
public debug(message: any): void {
this.log(arguments, LogSeverity.DEBUG);
}
public info(message: any): void {
this.log(arguments, LogSeverity.INFO);
}
public warn(message: any): void {
this.log(arguments, LogSeverity.WARNING);
}
public error(message: any): void {
this.log(arguments, LogSeverity.ERROR);
}
public fatal(message: any): void {
this.log(arguments, LogSeverity.FATAL);
}
public deprecate(alternative?: string, methodOverride?: string): void {
let e: Error = new Error();
let args: any = [];
Eif (!methodOverride) {
args.push(this._getDeprecatedMethodMessage(e));
}
else {
args.push(methodOverride);
}
if (alternative) {
args.push(this._getDeprecatedAlternativeMessage(alternative));
}
args.push('\n\n');
args.push(e.stack);
this.log(args, LogSeverity.DEPRECATE);
}
public deprecateParameterType(argumentLocation: number, deprecatedType: string, alternative?: string): void {
let e: Error = new Error();
let args: any = [];
args.push(this._getDeprecatedParameterMethodMessage(e, argumentLocation, deprecatedType));
Eif (alternative) {
args.push(this._getDeprecatedParameterAlternativeMessage(alternative, argumentLocation));
}
args.push('\n\n');
args.push(e.stack);
this.log(args, LogSeverity.DEPRECATE);
}
private _getDeprecatedMethodMessage(e: Error): string {
let stack = e.stack.split('\n')[2].replace(/^\s+at\s+(.+?)\s.+/g, '$1');
let obj: string = 'Method';
if (stack === "new") {
stack = e.stack.split('\n')[2].replace(/^\s+at new\s+(.+?)\s.+/g, '$1');
obj = 'Class';
}
return `${obj} ${stack} is deprecated.`
}
private _getDeprecatedAlternativeMessage(alternative: string): string {
return `Use ${alternative} instead.`;
}
private _getDeprecatedParameterMethodMessage(e: Error, argumentLocation: number, parameter: string): string {
let stack = e.stack.split('\n')[2].replace(/^\s+at\s+(.+?)\s.+/g, '$1');
let obj: string = 'Method';
Iif (stack === "new") {
stack = e.stack.split('\n')[2].replace(/^\s+at new\s+(.+?)\s.+/g, '$1');
obj = 'Class';
}
return `${obj} ${stack} ${parameter} at parameter ${argumentLocation} is deprecated.`
}
private _getDeprecatedParameterAlternativeMessage(alternative: string, argumentLocation: number): string {
return `Use ${alternative} at parameter ${argumentLocation} instead.`;
}
}
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