78 lines
2.8 KiB
TypeScript
78 lines
2.8 KiB
TypeScript
import {Logger, TaggedLogger, LogLevel} from './types';
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import moment from 'moment';
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import _ from 'lodash';
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export type LoggingFunction = (...args: any[]) => void;
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const noopTaggedLogger: TaggedLogger = {
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log(level: LogLevel, ...args: any[]): void {},
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debug(...args: any[]): void {},
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info(...args: any[]): void {},
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warn(...args: any[]): void {},
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error(...args: any[]): void {},
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profile(...args: any[]): void {},
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};
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export interface ActivatableLogger extends Logger {
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init(enabled: boolean, loggingFunction?: LoggingFunction): void;
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}
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export class ActivatableLoggerImpl implements ActivatableLogger {
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private enabled: boolean = false;
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private loggingFunction: LoggingFunction = console.info;
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init(enabled: boolean, loggingFunction?: LoggingFunction): void {
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const config = require('./config').config;
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this.enabled = enabled;
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this.loggingFunction = loggingFunction || console.info;
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}
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tag(...tags: string[]): TaggedLogger {
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if (this.enabled) {
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const loggingFunction = this.loggingFunction;
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return {
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log(level: LogLevel, ...args: any[]): void {
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const timeStr = moment().format('YYYY-MM-DD HH:mm:ss');
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const levelStr = level.toUpperCase();
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const tagsStr = tags ? '[' + _.join(tags, ', ') + ']' : '';
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const messagePrefix = `${timeStr} ${levelStr} - ${tagsStr}`;
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// Make sure to only replace %s, etc. in real log message
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// but not in tags.
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const escapedMessagePrefix = messagePrefix.replace(/%/g, '%%');
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let message = '';
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if (args && _.isString(args[0])) {
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message = args[0];
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args.shift();
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}
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const logStr = message
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? `${escapedMessagePrefix} ${message}`
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: escapedMessagePrefix;
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loggingFunction(logStr, ...args);
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},
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debug(...args: any[]): void {
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this.log('debug', ...args);
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},
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info(...args: any[]): void {
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this.log('info', ...args);
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},
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warn(...args: any[]): void {
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this.log('warn', ...args);
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},
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error(...args: any[]): void {
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this.log('error', ...args);
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},
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profile(...args: any[]): void {
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this.log('profile', ...args);
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},
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}
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} else {
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return noopTaggedLogger;
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}
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}
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}
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export default new ActivatableLoggerImpl() as ActivatableLogger;
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