🔧 Refactoring unrar for single and multiple file extraction

src/server/route/routes/importComics.routes.ts

@@ -10,12 +10,18 @@ import {
 import { Request, Response } from "express";
 
 router.route("/getComicCovers").get(async (req: Request, res: Response) => {
-  // const foo = await unrar("./comics/covers/");
+  const foo = await extractArchive({
+    name: "Dante's Inferno 02 (2010) (noads) (Legion-CPS).cbr",
+    extension: ".cbr",
+    containedIn: "comics/Dante's Inferno",
+    isFile: true,
+    isLink: false,
+  });
   // const foo = await extractMetadataFromImage(
   //   "./comics/covers/Ghosts and Ruins-001.jpg",
   // );
   // const foo = await unzipOne();
-  const foo = await unzip("asd");
+  // const foo = await unzip("asd");
   res.json({
     jagan: "trupti",
     foo,

src/server/utils/fs.utils.ts

@@ -14,46 +14,90 @@ import {
 
 export const unrar = async (
   extractionOptions: IExtractionOptions,
-): Promise<IExtractedComicBookCoverFile> => {
+): Promise<
+  IExtractedComicBookCoverFile | IExtractComicBookCoverErrorResponse
+> => {
   const comicCoversTargetPath =
-    extractionOptions.sourceFolder + extractionOptions.extractTarget;
+    extractionOptions.sourceFolder +
+    extractionOptions.targetComicCoversFolder +
+    "/";
   const buf = Uint8Array.from(
     fs.readFileSync(
-      extractionOptions.sourceFolder + extractionOptions.folderDetails.name,
+      extractionOptions.folderDetails.containedIn +
+        "/" +
+        extractionOptions.folderDetails.name,
     ),
   ).buffer;
   const extractor = await unrarer.createExtractorFromData({ data: buf });
   const list = extractor.getFileList();
   const fileHeaders = [...list.fileHeaders];
-  // extract the first file only
-  const extracted = extractor.extract({ files: [fileHeaders[0].name] });
-  const files = [...extracted.files];
-  const extractedFile = files[0];
-  const myBuffer = extractedFile.extraction;
+  switch (extractionOptions.extractTarget) {
+    // extract the first file only
+    case "cover":
+      const arcHeader = extractor.extract({ files: [fileHeaders[0].name] });
+      const file = [...arcHeader.files];
+      const extractedFile = file[0];
+      const fileArrayBuffer = extractedFile.extraction;
 
-  logger.info(`Attempting to write ${extractedFile.fileHeader.name}`);
+      logger.info(`Attempting to write ${extractedFile.fileHeader.name}`);
 
-  return new Promise((resolve, reject) => {
-    fs.writeFile(
-      comicCoversTargetPath + extractedFile.fileHeader.name,
-      myBuffer,
-      (err) => {
-        if (err) {
-          logger.error("Failed to write file", err);
-          reject(err);
-        } else {
-          logger.info(
-            `The file ${extractedFile.fileHeader.name} was saved to disk.`,
-          );
-          resolve({
-            name: `${extractedFile.fileHeader.name}`,
-            path: comicCoversTargetPath,
-            fileSize: extractedFile.fileHeader.packSize,
-          });
-        }
-      },
-    );
-  });
+      return new Promise((resolve, reject) => {
+        fs.writeFile(
+          comicCoversTargetPath + extractedFile.fileHeader.name,
+          fileArrayBuffer,
+          (err) => {
+            if (err) {
+              logger.error("Failed to write file", err);
+              reject(err);
+            } else {
+              logger.info(
+                `The file ${extractedFile.fileHeader.name} was saved to disk.`,
+              );
+              resolve({
+                name: `${extractedFile.fileHeader.name}`,
+                path: comicCoversTargetPath,
+                fileSize: extractedFile.fileHeader.packSize,
+              });
+            }
+          },
+        );
+      });
+    case "all":
+      const extractedFileHeaders = extractor.extract({});
+      const files = [...extractedFileHeaders.files];
+      const extractedFiles = files[0];
+      const filesBuffer = extractedFile.extraction;
+
+      logger.info(`Attempting to write ${extractedFiles.fileHeader.name}`);
+
+      return new Promise((resolve, reject) => {
+        fs.writeFile(
+          comicCoversTargetPath + extractedFiles.fileHeader.name,
+          filesBuffer,
+          (err) => {
+            if (err) {
+              logger.error("Failed to write file", err);
+              reject(err);
+            } else {
+              logger.info(
+                `The file ${extractedFile.fileHeader.name} was saved to disk.`,
+              );
+              resolve({
+                name: `${extractedFile.fileHeader.name}`,
+                path: comicCoversTargetPath,
+                fileSize: extractedFile.fileHeader.packSize,
+              });
+            }
+          },
+        );
+      });
+    default:
+      return {
+        message: "File format not supported, yet.",
+        errorCode: "90",
+        data: "asda",
+      };
+  }
 };
 
 export const extractMetadataFromImage = async (