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backend/node_modules/pino-pretty/lib/utils/prettify-message.js

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