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/
createConsoleLogger.ts
72 lines (64 loc) · 1.68 KB
/
createConsoleLogger.ts
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import { Pure } from '@typed/env'
import { Clock } from '@typed/timer'
import { Logger, LogLevel } from './types'
export type CreateConsoleLoggerOptions = {
readonly logLevel: LogLevel
readonly clock: Clock
}
/**
* Create a logger that wraps the console.
*/
export function createConsoleLogger({ logLevel, clock }: CreateConsoleLoggerOptions): Logger {
const timers: Record<string, number> = {}
const logger: Logger = {
log: (msg: string) =>
Pure.fromIO(() => {
if (logLevel > LogLevel.OFF) {
console.log(msg)
}
}),
error: (msg: string) =>
Pure.fromIO(() => {
if (logLevel > LogLevel.OFF) {
console.error(msg)
}
}),
clear: () =>
Pure.fromIO(() => {
if (logLevel > LogLevel.OFF && logLevel < LogLevel.DEBUG) {
console.clear()
}
}),
info: (msg: string) =>
Pure.fromIO(() => {
if (logLevel >= LogLevel.INFO) {
console.info(msg)
}
}),
debug: (msg: string) =>
Pure.fromIO(() => {
if (logLevel >= LogLevel.DEBUG) {
console.debug(msg)
}
}),
timeStart: (label: string) =>
Pure.fromIO(() => {
if (logLevel < LogLevel.DEBUG) {
return
}
timers[label] = clock.currentTime()
}),
timeEnd: (label: string) =>
Pure.fromIO(() => {
if (logLevel < LogLevel.DEBUG || !timers[label]) {
return -1
}
const startTime = timers[label]
const elapsed = clock.currentTime() - startTime
delete timers[label]
console.debug(`${label}: ${elapsed}ms`)
return elapsed
}),
}
return logger
}