From eeecfbf4a676abf8f210886f5f5142ba82e04483 Mon Sep 17 00:00:00 2001
From: Sebastian Qvarfordt <s.qvarfordt@gmail.com>
Date: Thu, 3 Dec 2020 15:00:03 +0100
Subject: [PATCH] Cache techdocs build using UrlReader (#3551)

* Better caching is coming when some backstage core features are in place. Currently let's just cache it for 30 minutes

* Fixed prettier
---
 plugins/techdocs-backend/src/service/helpers.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/plugins/techdocs-backend/src/service/helpers.ts b/plugins/techdocs-backend/src/service/helpers.ts
index 4a736f7388..012061dc0a 100644
--- a/plugins/techdocs-backend/src/service/helpers.ts
+++ b/plugins/techdocs-backend/src/service/helpers.ts
@@ -120,6 +120,16 @@ export class DocsBuilder {
       }
     }
 
+    // TODO: Better caching for URL.
+    if (type === 'url') {
+      const builtAt = buildMetadataStorage.getTimestamp();
+      const now = Date.now();
+
+      if (builtAt > now - 1800000) {
+        return true;
+      }
+    }
+
     this.logger.debug(
       `Docs for entity ${getEntityId(this.entity)} was outdated.`,
     );