From ed7f863a12c95f8c4816aeba2b0d3c326b6c694f Mon Sep 17 00:00:00 2001
From: Alvis HT Tang <alvis@hilbert.space>
Date: Thu, 15 Jul 2021 23:32:29 +0100
Subject: [PATCH] fix: ignore cache if last_edit_time is within the last minute

see https://developers.notion.com/changelog/last-edited-time-is-now-rounded-to-the-nearest-minute
---
 source/client.ts  |  9 ++++++++-
 source/node.ts    | 14 ++++++--------
 spec/node.spec.ts |  2 +-
 3 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/source/client.ts b/source/client.ts
index ca04bd3..cfb9c54 100644
--- a/source/client.ts
+++ b/source/client.ts
@@ -71,6 +71,8 @@ export const DEFAULT_TTL: NotionTTL = {
   pageContent: 0,
 };
 
+const ONE_MINUTE = 60000;
+
 /** A simple Notion client */
 export class Notion {
   private cache: Cache;
@@ -277,7 +279,12 @@ export class Notion {
     const cacheKey = `page:${page.id}:content`;
     const cachedPage = await this.cache.get<FullPage>(cacheKey);
 
-    if (cachedPage && cachedPage.last_edited_time === page.last_edited_time) {
+    if (
+      cachedPage &&
+      cachedPage.last_edited_time === page.last_edited_time &&
+      // don't use the cache if the last edited time happened to be the last minute since Notion rounded the time resolution to minute level recently
+      Date.now() - new Date(page.last_edited_time).getTime() > ONE_MINUTE
+    ) {
       return cachedPage;
     } else {
       const normalisedPage = await this.normalisePage(page);
diff --git a/source/node.ts b/source/node.ts
index 628eadb..8082a5c 100644
--- a/source/node.ts
+++ b/source/node.ts
@@ -13,6 +13,8 @@
  * -------------------------------------------------------------------------
  */
 
+import { createHash } from 'crypto';
+
 import { name } from '#.';
 
 import type { NodeInput, NodePluginArgs } from 'gatsby';
@@ -39,6 +41,7 @@ type NormalisedEntity<E extends FullEntity = FullEntity> = E extends any
   ? Omit<E, 'parent'> & {
       parent: Link | null;
       children: Link[];
+      digest: string;
     }
   : never;
 
@@ -189,10 +192,7 @@ export class NodeManager {
         this.createNodeId(`${object}:${id}`),
       ),
       internal: {
-        contentDigest: this.createContentDigest({
-          id: entity.id,
-          lastEditedTime: entity.last_edited_time,
-        }),
+        contentDigest: entity.digest,
         ...internal,
       },
     };
@@ -254,10 +254,7 @@ export class NodeManager {
 
     for (const [id, newEntity] of newMap.entries()) {
       const oldEntity = oldMap.get(id);
-      if (
-        oldEntity &&
-        oldEntity.last_edited_time !== newEntity.last_edited_time
-      ) {
+      if (oldEntity && oldEntity.digest !== newEntity.digest) {
         updated.push(newEntity);
       }
     }
@@ -298,6 +295,7 @@ export function computeEntityMap(
       ...entity,
       parent: normaliseParent(entity.parent),
       children: [],
+      digest: createHash('sha256').update(JSON.stringify(entity)).digest('hex'),
     });
   }
 
diff --git a/spec/node.spec.ts b/spec/node.spec.ts
index 6bc9198..731f5b8 100644
--- a/spec/node.spec.ts
+++ b/spec/node.spec.ts
@@ -241,7 +241,7 @@ describe('cl:NodeManager', () => {
         ],
       });
       await manager.update([updatedDatabase, ...updatedDatabase.pages]);
-      expect(createNode).toBeCalledTimes(1);
+      expect(createNode).toBeCalledTimes(2);
       expect(deleteNode).toBeCalledTimes(1);
     });
   });