pino-pretty
Version:
Prettifier for Pino log lines
38 lines (31 loc) • 1.24 kB
JavaScript
module.exports = interpretConditionals
const getPropertyValue = require('./get-property-value')
/**
* Translates all conditional blocks from within the messageFormat. Translates
* any matching {if key}{key}{end} statements and returns everything between
* if and else blocks if the key provided was found in log.
*
* @param {MessageFormatString|MessageFormatFunction} messageFormat A format
* string or function that defines how the logged message should be
* conditionally formatted.
* @param {object} log The log object to be modified.
*
* @returns {string} The parsed messageFormat.
*/
function interpretConditionals (messageFormat, log) {
messageFormat = messageFormat.replace(/{if (.*?)}(.*?){end}/g, replacer)
// Remove non-terminated if blocks
messageFormat = messageFormat.replace(/{if (.*?)}/g, '')
// Remove floating end blocks
messageFormat = messageFormat.replace(/{end}/g, '')
return messageFormat.replace(/\s+/g, ' ').trim()
function replacer (_, key, value) {
const propertyValue = getPropertyValue(log, key)
if (propertyValue && value.includes(key)) {
return value.replace(new RegExp('{' + key + '}', 'g'), propertyValue)
} else {
return ''
}
}
}