From 794fd57b856a2f42c6ddf2db0e7cd98c708da8bd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maty=C3=A1=C5=A1=20Caras?= <matyas@caras.cafe>
Date: Thu, 23 Nov 2023 19:24:47 +0100
Subject: [PATCH] feat(mastodon): :zap: add caching to mastodon

---
 .vscode/settings.json |  5 ++++-
 src/api/mastodon.ts   | 13 +++++++++++--
 src/server.ts         |  9 +++++++--
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/.vscode/settings.json b/.vscode/settings.json
index 3662b37..995e934 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,3 +1,6 @@
 {
-  "typescript.tsdk": "node_modules/typescript/lib"
+  "typescript.tsdk": "node_modules/typescript/lib",
+  "conventionalCommits.scopes": [
+    "mastodon"
+  ]
 }
\ No newline at end of file
diff --git a/src/api/mastodon.ts b/src/api/mastodon.ts
index 5771d45..ee4d3a8 100644
--- a/src/api/mastodon.ts
+++ b/src/api/mastodon.ts
@@ -1,4 +1,5 @@
 import axios from 'axios';
+import { cache } from '../server';
 
 async function findMastodonUser(username: string, host: string): Promise<string> {
   const res = await axios.get(`${host}/api/v2/search?q=${username}`, {
@@ -26,6 +27,11 @@ interface MastodonPost {
 }
 
 async function getLatestMastodonPost(id: string, host: string): Promise<MastodonPost> {
+  const cached = cache.get('mastodon') as MastodonPost | undefined;
+  if (cached != undefined) {
+    console.info('Returning mastodon from cache');
+    return cached;
+  }
   const res = await axios.get(
     `${host}/api/v1/accounts/${id}/statuses?limit=1&exclude_reblogs=true`,
     {
@@ -47,7 +53,7 @@ async function getLatestMastodonPost(id: string, host: string): Promise<Mastodon
       mediaUrl.push(media['url'] as string);
     }
   });
-  return {
+  const postData = {
     url: data['url'],
     content: decodeURI(data['content']),
     favourites: data['favourites_count'],
@@ -55,8 +61,11 @@ async function getLatestMastodonPost(id: string, host: string): Promise<Mastodon
     replies: data['replies_count'],
     inReplyTo: inReplyTo,
     mediaUrls: mediaUrl,
-    user: data['account']['username']
+    user: data['account']['username'],
   };
+  cache.set('mastodon', postData);
+  console.info('Saved mastodon to cache');
+  return postData;
 }
 
 export { findMastodonUser, getLatestMastodonPost };
diff --git a/src/server.ts b/src/server.ts
index a1907b6..c29290e 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -7,7 +7,12 @@ import fastifyView from '@fastify/view';
 import ejs from 'ejs';
 import path from 'path';
 import { readFileSync } from 'fs';
-import { createSchema as S, TsjsonParser, Validated } from 'ts-json-validator';
+import { createSchema as S, TsjsonParser } from 'ts-json-validator';
+import NodeCache from "node-cache"
+
+const cache = new NodeCache({
+  stdTTL: 3600
+});
 
 // load userconfig
 const parser = new TsjsonParser(
@@ -102,7 +107,7 @@ const parser = new TsjsonParser(
     required: ['theme'],
   }),
 );
-export { parser };
+export { parser, cache };
 
 let userConfig;
 try {