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63 lines
1.4 KiB
63 lines
1.4 KiB
'use strict'
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const { format } = require('util')
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function build () {
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const codes = {}
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const emitted = new Map()
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function create (name, code, message) {
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if (!name) throw new Error('Warning name must not be empty')
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if (!code) throw new Error('Warning code must not be empty')
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if (!message) throw new Error('Warning message must not be empty')
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code = code.toUpperCase()
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if (codes[code] !== undefined) {
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throw new Error(`The code '${code}' already exist`)
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}
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function buildWarnOpts (a, b, c) {
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// more performant than spread (...) operator
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let formatted
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if (a && b && c) {
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formatted = format(message, a, b, c)
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} else if (a && b) {
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formatted = format(message, a, b)
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} else if (a) {
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formatted = format(message, a)
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} else {
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formatted = message
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}
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return {
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code,
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name,
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message: formatted
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}
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}
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emitted.set(code, false)
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codes[code] = buildWarnOpts
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return codes[code]
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}
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function emit (code, a, b, c) {
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if (codes[code] === undefined) throw new Error(`The code '${code}' does not exist`)
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if (emitted.get(code) === true) return
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emitted.set(code, true)
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const warning = codes[code](a, b, c)
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process.emitWarning(warning.message, warning.name, warning.code)
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}
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return {
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create,
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emit,
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emitted
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}
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}
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module.exports = build
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