feat(enc-80): support for dynamic tags

CondeNast · Jun 30, 2021 · 9687173 · 9687173
1 parent ebfaf44
commit 9687173
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/.prettierignore b/.prettierignore
@@ -1,2 +1,3 @@
 package.json
 package-lock.json
+node_modules/
diff --git a/index.js b/index.js
@@ -24,14 +24,18 @@ async function fastifyDatadog (fastify, options = {}) {
     return seconds * 1e3 + nanoseconds / 1e6
   }
 
+  let dynamicTags = tags;
   fastify.addHook('onRequest', async (req, reply) => {
     req[startTimeSymbol] = now()
+    if (typeof tags === 'function') {
+      dynamicTags = tags(req);
+    }
   })
 
   fastify.addHook('onSend', async (req, reply) => {
     const { context, statusCode } = reply
 
-    const statTags = [`route:${context.config.url}`, ...tags]
+    const statTags = [`route:${context.config.url}`, ...dynamicTags]
 
     if (method) {
       statTags.push(`method:${req.method.toLowerCase()}`)