feat: correctly cache images with redis

lib/documents.ts

@@ -2,6 +2,7 @@ import { unified } from "npm:unified";
 import remarkParse from "npm:remark-parse";
 import remarkFrontmatter from "https://esm.sh/remark-frontmatter@4";
 import { parse } from "https://deno.land/std@0.194.0/yaml/mod.ts";
+import * as cache from "@lib/cache/documents.ts";
 
 const SILVERBULLET_SERVER = Deno.env.get("SILVERBULLET_SERVER");
 
@@ -18,6 +19,9 @@ export function parseFrontmatter(yaml: string) {
 }
 
 export async function getDocuments(): Promise<Document[]> {
+  const cachedDocuments = await cache.getDocuments();
+  if (cachedDocuments) return cachedDocuments;
+
   const headers = new Headers();
   headers.append("Accept", "application/json");
 
@@ -25,12 +29,22 @@ export async function getDocuments(): Promise<Document[]> {
     headers: headers,
   });
 
-  return response.json();
+  const documents = await response.json();
+  cache.setDocuments(documents);
+
+  return documents;
 }
 
 export async function getDocument(name: string): Promise<string> {
+  const cachedDocument = await cache.getDocument(name);
+  if (cachedDocument) return cachedDocument;
+
   const response = await fetch(SILVERBULLET_SERVER + "/" + name);
-  return await response.text();
+  const text = await response.text();
+
+  cache.setDocument(name, text);
+
+  return text;
 }
 
 export function parseDocument(doc: string) {