first commit

app/lib/testcase-backend/zip.ts

@@ -0,0 +1,31 @@
+import archiver from "archiver";
+import fs from "fs";
+import path from "path";
+
+export function createZipFile(
+  sourceDir: string,
+  zipPath: string,
+  englishName: string | null
+): Promise<void> {
+  return new Promise((resolve, reject) => {
+    const output = fs.createWriteStream(zipPath);
+    const archive = archiver("zip", { zlib: { level: 9 } });
+
+    output.on("close", () => resolve());
+    archive.on("error", reject);
+    archive.pipe(output);
+
+    if (englishName) {
+      const files = fs.readdirSync(sourceDir);
+      const targetFiles = files.filter(
+        (f) => f.startsWith(englishName) && (f.endsWith(".in") || f.endsWith(".out"))
+      );
+      for (const file of targetFiles) {
+        archive.file(path.join(sourceDir, file), { name: file });
+      }
+    } else {
+      archive.directory(sourceDir, false);
+    }
+    archive.finalize();
+  });
+}