From e8988e0e4cbc7c00585704804bd03509ac9d1901 Mon Sep 17 00:00:00 2001
From: Amy <minds10@hotmail.com>
Date: Thu, 14 Oct 2021 23:32:38 -0400
Subject: [PATCH] Refactor encoding constants

---
 scripts/optimize-images.ts | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/scripts/optimize-images.ts b/scripts/optimize-images.ts
index db82dab6..dadf9f98 100644
--- a/scripts/optimize-images.ts
+++ b/scripts/optimize-images.ts
@@ -19,12 +19,17 @@ const IMAGES_DESTINATION_DIRECTORY = "public/images";
 
 void optimizeImages();
 
+const IMAGE_ENCODE_OPTIONS = { mozjpeg: {} };
+const GET_ENCODER_FROM_EXTENSION: { [imageExtension: string]: string } = {
+  jpg: "mozjpeg",
+  jpeg: "mozjpeg",
+};
+
 export async function optimizeImages() {
   const imagePaths = await getFilePathsInDirectory(IMAGES_SOURCE_DIRECTORY);
   await fse.emptyDir(IMAGES_DESTINATION_DIRECTORY);
 
   const imagePool = new ImagePool(cpus().length);
-  const encodeOptions = { mozjpeg: {} };
 
   await Promise.all(
     imagePaths.map(async (imagePath) => {
@@ -33,9 +38,9 @@ export async function optimizeImages() {
         IMAGES_DESTINATION_DIRECTORY,
         imagePath
       );
-      const fileExtension = imagePath.split(".").pop();
+      const fileExtension = imagePath.split(".").pop() ?? "";
 
-      if (!(fileExtension === "jpg" || fileExtension === "jpeg")) {
+      if (!GET_ENCODER_FROM_EXTENSION[fileExtension]) {
         await fse.copy(sourcePath, destinationPath);
         return;
       }
@@ -44,10 +49,12 @@ export async function optimizeImages() {
       const ingestedImage = imagePool.ingestImage(rawImageFile);
 
       await ingestedImage.decoded;
-      await ingestedImage.encode(encodeOptions);
+      await ingestedImage.encode(IMAGE_ENCODE_OPTIONS);
 
-      const encodedImage = (await ingestedImage.encodedWith.mozjpeg).binary;
-      await fse.outputFile(destinationPath, encodedImage);
+      const encodedImage = await ingestedImage.encodedWith[
+        GET_ENCODER_FROM_EXTENSION[fileExtension]
+      ];
+      await fse.outputFile(destinationPath, encodedImage.binary);
     })
   );