basic.js
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import util from 'util'
import { parseStack } from '../utils/error'
import { writeStream } from '../utils/stream'
import { formatDate } from '../utils/date'
const DEFAULTS = {
dateFormat: 'HH:mm:ss',
formatOptions: {
date: true,
colors: false,
compact: true
}
}
const bracket = x => x ? `[${x}]` : ''
export default class BasicReporter {
constructor (options) {
this.options = Object.assign({}, DEFAULTS, options)
}
formatStack (stack) {
return ' ' + parseStack(stack).join('\n ')
}
formatArgs (args) {
const _args = args.map(arg => {
if (arg && typeof arg.stack === 'string') {
return arg.message + '\n' + this.formatStack(arg.stack)
}
return arg
})
// Only supported with Node >= 10
// https://nodejs.org/api/util.html#util_util_inspect_object_options
if (typeof util.formatWithOptions === 'function') {
return util.formatWithOptions(this.options.formatOptions, ..._args)
} else {
return util.format(..._args)
}
}
formatDate (date) {
return this.options.formatOptions.date ? formatDate(this.options.dateFormat, date) : ''
}
filterAndJoin (arr) {
return arr.filter(x => x).join(' ')
}
formatLogObj (logObj) {
const message = this.formatArgs(logObj.args)
return this.filterAndJoin([
bracket(logObj.type),
bracket(logObj.tag),
message
])
}
log (logObj, { async, stdout, stderr } = {}) {
const line = this.formatLogObj(logObj, {
width: stdout.columns || 0
})
return writeStream(
line + '\n',
logObj.level < 2 ? stderr : stdout,
async ? 'async' : 'default'
)
}
}