64 lines
2.0 KiB
JavaScript
64 lines
2.0 KiB
JavaScript
'use strict'
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module.exports = prettifyMessage
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const {
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LEVELS
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} = require('../constants')
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const getPropertyValue = require('./get-property-value')
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const interpretConditionals = require('./interpret-conditionals')
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/**
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* @typedef {object} PrettifyMessageParams
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* @property {object} log The log object with the message to colorize.
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* @property {PrettyContext} context The context object built from parsing
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* the options.
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*/
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/**
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* Prettifies a message string if the given `log` has a message property.
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*
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* @param {PrettifyMessageParams} input
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*
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* @returns {undefined|string} If the message key is not found, or the message
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* key is not a string, then `undefined` will be returned. Otherwise, a string
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* that is the prettified message.
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*/
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function prettifyMessage ({ log, context }) {
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const {
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colorizer,
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customLevels,
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levelKey,
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levelLabel,
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messageFormat,
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messageKey,
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useOnlyCustomProps
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} = context
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if (messageFormat && typeof messageFormat === 'string') {
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const parsedMessageFormat = interpretConditionals(messageFormat, log)
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const message = String(parsedMessageFormat).replace(
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/{([^{}]+)}/g,
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function (match, p1) {
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// return log level as string instead of int
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let level
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if (p1 === levelLabel && (level = getPropertyValue(log, levelKey)) !== undefined) {
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const condition = useOnlyCustomProps ? customLevels === undefined : customLevels[level] === undefined
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return condition ? LEVELS[level] : customLevels[level]
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}
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// Parse nested key access, e.g. `{keyA.subKeyB}`.
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return getPropertyValue(log, p1) || ''
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})
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return colorizer.message(message)
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}
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if (messageFormat && typeof messageFormat === 'function') {
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const msg = messageFormat(log, messageKey, levelLabel)
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return colorizer.message(msg)
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}
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if (messageKey in log === false) return undefined
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if (typeof log[messageKey] !== 'string' && typeof log[messageKey] !== 'number' && typeof log[messageKey] !== 'boolean') return undefined
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return colorizer.message(log[messageKey])
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}
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