initial commit

apps/Backend/src/services/databaseBackupService.ts

@@ -0,0 +1,85 @@
+import { spawn } from "child_process";
+import fs from "fs";
+import os from "os";
+import path from "path";
+import archiver from "archiver";
+
+function safeRmDir(dir: string) {
+  try {
+    fs.rmSync(dir, { recursive: true, force: true });
+  } catch {}
+}
+
+interface BackupToPathParams {
+  destinationPath: string;
+  filename: string;
+}
+
+export async function backupDatabaseToPath({
+  destinationPath,
+  filename,
+}: BackupToPathParams): Promise<void> {
+  const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), "dental_backup_"));
+
+  return new Promise((resolve, reject) => {
+    const pgDump = spawn(
+      "pg_dump",
+      [
+        "-Fd",
+        "-j",
+        "4",
+        "--no-acl",
+        "--no-owner",
+        "-h",
+        process.env.DB_HOST || "localhost",
+        "-U",
+        process.env.DB_USER || "postgres",
+        process.env.DB_NAME || "dental_db",
+        "-f",
+        tmpDir,
+      ],
+      {
+        env: {
+          ...process.env,
+          PGPASSWORD: process.env.DB_PASSWORD,
+        },
+      }
+    );
+
+    let pgError = "";
+
+    pgDump.stderr.on("data", (d) => (pgError += d.toString()));
+
+    pgDump.on("close", async (code) => {
+      if (code !== 0) {
+        safeRmDir(tmpDir);
+        return reject(new Error(pgError || "pg_dump failed"));
+      }
+
+      const outputFile = path.join(destinationPath, filename);
+      const outputStream = fs.createWriteStream(outputFile);
+
+      const archive = archiver("zip");
+
+      outputStream.on("error", (err) => {
+        safeRmDir(tmpDir);
+        reject(err);
+      });
+
+      archive.on("error", (err) => {
+        safeRmDir(tmpDir);
+        reject(err);
+      });
+
+      archive.pipe(outputStream);
+      archive.directory(tmpDir + path.sep, false);
+
+      archive.finalize();
+
+      archive.on("end", () => {
+        safeRmDir(tmpDir);
+        resolve();
+      });
+    });
+  });
+}