From 2d3138a99a98e8ffa76e7719dbab3ac4fbd3010a Mon Sep 17 00:00:00 2001
From: uzlopak <aras.abbasi@googlemail.com>
Date: Thu, 12 Sep 2024 00:23:23 +0200
Subject: [PATCH] fix: DRY lib/core/diagnostics.js

---
 lib/core/diagnostics.js | 133 +++++++++++++++++-----------------------
 1 file changed, 57 insertions(+), 76 deletions(-)

diff --git a/lib/core/diagnostics.js b/lib/core/diagnostics.js
index e1af3db6112..35b825ec453 100644
--- a/lib/core/diagnostics.js
+++ b/lib/core/diagnostics.js
@@ -5,7 +5,7 @@ const util = require('node:util')
 const undiciDebugLog = util.debuglog('undici')
 const fetchDebuglog = util.debuglog('fetch')
 const websocketDebuglog = util.debuglog('websocket')
-let isClientSet = false
+
 const channels = {
   // Client
   beforeConnect: diagnosticsChannel.channel('undici:client:beforeConnect'),
@@ -26,17 +26,23 @@ const channels = {
   pong: diagnosticsChannel.channel('undici:websocket:pong')
 }
 
-if (undiciDebugLog.enabled || fetchDebuglog.enabled) {
-  const debuglog = fetchDebuglog.enabled ? fetchDebuglog : undiciDebugLog
+let isTrackingClientEvents = false
+
+function trackClientEvents (debugLog = undiciDebugLog) {
+  if (isTrackingClientEvents) {
+    return
+  }
+
+  isTrackingClientEvents = true
 
-  // Track all Client events
   diagnosticsChannel.channel('undici:client:beforeConnect').subscribe(evt => {
     const {
       connectParams: { version, protocol, port, host }
     } = evt
-    debuglog(
-      'connecting to %s using %s%s',
-      `${host}${port ? `:${port}` : ''}`,
+    debugLog(
+      'connecting to %s%s using %s%s',
+      host,
+      port ? `:${port}` : '',
       protocol,
       version
     )
@@ -46,9 +52,10 @@ if (undiciDebugLog.enabled || fetchDebuglog.enabled) {
     const {
       connectParams: { version, protocol, port, host }
     } = evt
-    debuglog(
-      'connected to %s using %s%s',
-      `${host}${port ? `:${port}` : ''}`,
+    debugLog(
+      'connected to %s%s using %s%s',
+      host,
+      port ? `:${port}` : '',
       protocol,
       version
     )
@@ -59,9 +66,10 @@ if (undiciDebugLog.enabled || fetchDebuglog.enabled) {
       connectParams: { version, protocol, port, host },
       error
     } = evt
-    debuglog(
-      'connection to %s using %s%s errored - %s',
-      `${host}${port ? `:${port}` : ''}`,
+    debugLog(
+      'connection to %s%s using %s%s errored - %s',
+      host,
+      port ? `:${port}` : '',
       protocol,
       version,
       error.message
@@ -72,16 +80,25 @@ if (undiciDebugLog.enabled || fetchDebuglog.enabled) {
     const {
       request: { method, path, origin }
     } = evt
-    debuglog('sending request to %s %s/%s', method, origin, path)
+    debugLog('sending request to %s %s/%s', method, origin, path)
   })
+}
+
+let isTrackingRequestEvents = false
+
+function trackRequestEvents (debugLog = undiciDebugLog) {
+  if (isTrackingRequestEvents) {
+    return
+  }
+
+  isTrackingRequestEvents = true
 
-  // Track Request events
   diagnosticsChannel.channel('undici:request:headers').subscribe(evt => {
     const {
       request: { method, path, origin },
       response: { statusCode }
     } = evt
-    debuglog(
+    debugLog(
       'received response to %s %s/%s - HTTP %d',
       method,
       origin,
@@ -94,7 +111,7 @@ if (undiciDebugLog.enabled || fetchDebuglog.enabled) {
     const {
       request: { method, path, origin }
     } = evt
-    debuglog('trailers received from %s %s/%s', method, origin, path)
+    debugLog('trailers received from %s %s/%s', method, origin, path)
   })
 
   diagnosticsChannel.channel('undici:request:error').subscribe(evt => {
@@ -102,7 +119,7 @@ if (undiciDebugLog.enabled || fetchDebuglog.enabled) {
       request: { method, path, origin },
       error
     } = evt
-    debuglog(
+    debugLog(
       'request to %s %s/%s errored - %s',
       method,
       origin,
@@ -110,73 +127,27 @@ if (undiciDebugLog.enabled || fetchDebuglog.enabled) {
       error.message
     )
   })
-
-  isClientSet = true
 }
 
-if (websocketDebuglog.enabled) {
-  if (!isClientSet) {
-    const debuglog = undiciDebugLog.enabled ? undiciDebugLog : websocketDebuglog
-    diagnosticsChannel.channel('undici:client:beforeConnect').subscribe(evt => {
-      const {
-        connectParams: { version, protocol, port, host }
-      } = evt
-      debuglog(
-        'connecting to %s%s using %s%s',
-        host,
-        port ? `:${port}` : '',
-        protocol,
-        version
-      )
-    })
-
-    diagnosticsChannel.channel('undici:client:connected').subscribe(evt => {
-      const {
-        connectParams: { version, protocol, port, host }
-      } = evt
-      debuglog(
-        'connected to %s%s using %s%s',
-        host,
-        port ? `:${port}` : '',
-        protocol,
-        version
-      )
-    })
-
-    diagnosticsChannel.channel('undici:client:connectError').subscribe(evt => {
-      const {
-        connectParams: { version, protocol, port, host },
-        error
-      } = evt
-      debuglog(
-        'connection to %s%s using %s%s errored - %s',
-        host,
-        port ? `:${port}` : '',
-        protocol,
-        version,
-        error.message
-      )
-    })
-
-    diagnosticsChannel.channel('undici:client:sendHeaders').subscribe(evt => {
-      const {
-        request: { method, path, origin }
-      } = evt
-      debuglog('sending request to %s %s/%s', method, origin, path)
-    })
+let isTrackingWebSocketEvents = false
+
+function trackWebSocketEvents (debugLog = websocketDebuglog) {
+  if (isTrackingWebSocketEvents) {
+    return
   }
 
-  // Track all WebSocket events
+  isTrackingWebSocketEvents = true
+
   diagnosticsChannel.channel('undici:websocket:open').subscribe(evt => {
     const {
       address: { address, port }
     } = evt
-    websocketDebuglog('connection opened %s%s', address, port ? `:${port}` : '')
+    debugLog('connection opened %s%s', address, port ? `:${port}` : '')
   })
 
   diagnosticsChannel.channel('undici:websocket:close').subscribe(evt => {
     const { websocket, code, reason } = evt
-    websocketDebuglog(
+    debugLog(
       'closed connection to %s - %s %s',
       websocket.url,
       code,
@@ -185,18 +156,28 @@ if (websocketDebuglog.enabled) {
   })
 
   diagnosticsChannel.channel('undici:websocket:socket_error').subscribe(err => {
-    websocketDebuglog('connection errored - %s', err.message)
+    debugLog('connection errored - %s', err.message)
   })
 
   diagnosticsChannel.channel('undici:websocket:ping').subscribe(evt => {
-    websocketDebuglog('ping received')
+    debugLog('ping received')
   })
 
   diagnosticsChannel.channel('undici:websocket:pong').subscribe(evt => {
-    websocketDebuglog('pong received')
+    debugLog('pong received')
   })
 }
 
+if (undiciDebugLog.enabled || fetchDebuglog.enabled) {
+  trackClientEvents(fetchDebuglog.enabled ? fetchDebuglog : undiciDebugLog)
+  trackRequestEvents(fetchDebuglog.enabled ? fetchDebuglog : undiciDebugLog)
+}
+
+if (websocketDebuglog.enabled) {
+  trackClientEvents(undiciDebugLog.enabled ? undiciDebugLog : websocketDebuglog)
+  trackWebSocketEvents(websocketDebuglog)
+}
+
 module.exports = {
   channels
 }