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52 lines
1.6 KiB
52 lines
1.6 KiB
import {LoggingLevel, LogMessage} from './types'
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import * as color from 'colors/safe'
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import {Awaitable} from '../support/types'
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/**
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* Base class for an application logger.
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*/
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export abstract class Logger {
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/**
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* Write the given message to the log destination.
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* @param {LogMessage} message
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* @return Promise<void>
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*/
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public abstract write(message: LogMessage): Awaitable<void>;
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/**
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* Format the date object to the string output format.
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* @param {Date} date
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* @return string
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*/
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protected formatDate(date: Date): string {
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const hours = date.getHours()
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const minutes = date.getMinutes()
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const seconds = date.getSeconds()
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return `${date.getFullYear()}-${date.getMonth()+1}-${date.getDate()} ${hours > 9 ? hours : '0' + hours}:${minutes > 9 ? minutes : '0' + minutes}:${seconds > 9 ? seconds : '0' + seconds}`
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}
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/**
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* Given a logging level, get the display string of that level.
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* @param {LoggingLevel} level
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* @return string
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*/
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protected levelDisplay(level: LoggingLevel): string {
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switch (level) {
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case LoggingLevel.Success:
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return color.green('success')
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case LoggingLevel.Error:
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return color.red(' error')
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case LoggingLevel.Warning:
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return color.yellow('warning')
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case LoggingLevel.Info:
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return color.blue(' info')
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case LoggingLevel.Debug:
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return color.cyan(' debug')
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case LoggingLevel.Verbose:
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return color.gray('verbose')
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case LoggingLevel.Silent:
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return color.gray(' silent')
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}
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}
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}
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