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

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+'use strict'
+
+module.exports = prettifyMetadata
+
+/**
+ * @typedef {object} PrettifyMetadataParams
+ * @property {object} log The log that may or may not contain metadata to
+ * be prettified.
+ * @property {PrettyContext} context The context object built from parsing
+ * the options.
+ */
+
+/**
+ * Prettifies metadata that is usually present in a Pino log line. It looks for
+ * fields `name`, `pid`, `hostname`, and `caller` and returns a formatted string using
+ * the fields it finds.
+ *
+ * @param {PrettifyMetadataParams} input
+ *
+ * @returns {undefined|string} If no metadata is found then `undefined` is
+ * returned. Otherwise, a string of prettified metadata is returned.
+ */
+function prettifyMetadata ({ log, context }) {
+  const prettifiers = context.customPrettifiers
+  let line = ''
+
+  if (log.name || log.pid || log.hostname) {
+    line += '('
+
+    if (log.name) {
+      line += prettifiers.name ? prettifiers.name(log.name) : log.name
+    }
+
+    if (log.pid) {
+      const prettyPid = prettifiers.pid ? prettifiers.pid(log.pid) : log.pid
+      if (log.name && log.pid) {
+        line += '/' + prettyPid
+      } else {
+        line += prettyPid
+      }
+    }
+
+    if (log.hostname) {
+      // If `pid` and `name` were in the ignore keys list then we don't need
+      // the leading space.
+      line += `${line === '(' ? 'on' : ' on'} ${prettifiers.hostname ? prettifiers.hostname(log.hostname) : log.hostname}`
+    }
+
+    line += ')'
+  }
+
+  if (log.caller) {
+    line += `${line === '' ? '' : ' '}<${prettifiers.caller ? prettifiers.caller(log.caller) : log.caller}>`
+  }
+
+  if (line === '') {
+    return undefined
+  } else {
+    return line
+  }
+}