Add digital catalog with shareable flipbook and ktg.montzar.ir deploy files.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/storage.ts

@@ -0,0 +1,75 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import { isJpeg } from "./magic";
+
+export class StorageError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = "StorageError";
+  }
+}
+
+export function pageFileName(n: number): string {
+  return `page-${String(n).padStart(3, "0")}.jpg`;
+}
+
+export function catalogDir(storageDir: string, id: string): string {
+  return path.join(storageDir, "catalogs", id);
+}
+
+export async function saveCatalogPages(
+  storageDir: string,
+  id: string,
+  pages: Buffer[],
+): Promise<void> {
+  const dir = catalogDir(storageDir, id);
+  await fs.mkdir(dir, { recursive: true });
+  let i = 1;
+  for (const page of pages) {
+    if (!isJpeg(page)) {
+      await fs.rm(dir, { recursive: true, force: true });
+      throw new StorageError("نوع فایل پشتیبانی نمی‌شود");
+    }
+    await fs.writeFile(path.join(dir, pageFileName(i)), page);
+    i += 1;
+  }
+}
+
+export async function saveQr(
+  storageDir: string,
+  id: string,
+  png: Buffer,
+): Promise<void> {
+  const dir = catalogDir(storageDir, id);
+  await fs.mkdir(dir, { recursive: true });
+  await fs.writeFile(path.join(dir, "qr.png"), png);
+}
+
+export async function readPage(
+  storageDir: string,
+  id: string,
+  n: number,
+): Promise<Buffer> {
+  const file = path.join(catalogDir(storageDir, id), pageFileName(n));
+  try {
+    return await fs.readFile(file);
+  } catch {
+    throw new StorageError("کاتالوگ پیدا نشد");
+  }
+}
+
+export async function readQr(storageDir: string, id: string): Promise<Buffer> {
+  const file = path.join(catalogDir(storageDir, id), "qr.png");
+  try {
+    return await fs.readFile(file);
+  } catch {
+    throw new StorageError("کاتالوگ پیدا نشد");
+  }
+}
+
+export async function deleteCatalogFiles(
+  storageDir: string,
+  id: string,
+): Promise<void> {
+  await fs.rm(catalogDir(storageDir, id), { recursive: true, force: true });
+}