feat: generate og image using templates

src/utils/generateOgImages.tsx

@@ -1,8 +1,8 @@
 import satori, { type SatoriOptions } from "satori";
-import { writeFile } from "node:fs/promises";
 import { Resvg } from "@resvg/resvg-js";
-import { getCollection } from "astro:content";
+import { type CollectionEntry } from "astro:content";
 import postOgImage from "./og-templates/post";
+import siteOgImage from "./og-templates/site";
 
 const fetchFonts = async () => {
   // Regular Font
@@ -42,42 +42,18 @@ const options: SatoriOptions = {
   ],
 };
 
-const generateOgImages = async () => {
-  const postImportResult = await getCollection(
-    "blog",
-    ({ data }) => !data.draft
-  );
-  const posts = Object.values(postImportResult).filter(
-    ({ data }) => !data.ogImage
-  );
+function svgBufferToPngBuffer(svg: string) {
+  const resvg = new Resvg(svg);
+  const pngData = resvg.render();
+  return pngData.asPng();
+}
 
-  const imageGenerationPromises = posts.map(async post => {
-    const svg = await satori(postOgImage(post.data.title), options);
+export async function generateOgImageForPost(post: CollectionEntry<"blog">) {
+  const svg = await satori(postOgImage(post), options);
+  return svgBufferToPngBuffer(svg);
+}
 
-    // render png in production mode
-    if (import.meta.env.MODE === "production") {
-      const resvg = new Resvg(svg);
-      const pngData = resvg.render();
-      const pngBuffer = pngData.asPng();
-
-      const outputImage = `${post.slug}.png`;
-
-      const LIGHT_BLUE = "\x1b[94m";
-      const DARK_GRAY = "\x1b[30m";
-      const RESET = "\x1b[0m";
-      console.info(
-        `  ${LIGHT_BLUE}└─${RESET} output png image:`,
-        `${DARK_GRAY}/${outputImage}${RESET}`
-      );
-
-      await writeFile(`./dist/${outputImage}`, pngBuffer);
-    }
-  });
-
-  // Wait for all image generation operations to complete
-  await Promise.all(imageGenerationPromises);
-
-  return null;
-};
-
-export default generateOgImages;
+export async function generateOgImageForSite() {
+  const svg = await satori(siteOgImage(), options);
+  return svgBufferToPngBuffer(svg);
+}