[FEATURE] Basic System with file manager (#4)

Co-authored-by: dunemask <dunemask@gmail.com>
Co-authored-by: Dunemask <dunemask@gmail.com>
Reviewed-on: https://gitea.dunemask.dev/elysium/minecluster/pulls/4

lib/k8s/server-files.js

@@ -0,0 +1,97 @@
+import ftp from "basic-ftp";
+import { ERR } from "../util/logging.js";
+import { getServerAssets } from "./k8s-server-control.js";
+import ExpressClientError from "../util/ExpressClientError.js";
+import { Readable, Writable, Transform } from "node:stream";
+
+const namespace = process.env.MCL_SERVER_NAMESPACE;
+
+const pathSecurityCheck = (path) => {
+  if (!path.startsWith("."))
+    throw new ExpressClientError({
+      m: "Only relative directories can be created",
+      c: 409,
+    });
+};
+
+const handleError = (e) => {
+  ERR("SERVER FILES", "Error occurred while preforming FTP operation!", e);
+  throw new ExpressClientError({
+    c: 500,
+    m: "Error occurred while performing FTP operation!",
+  });
+};
+
+export async function getFtpClient(serverService) {
+  const { name } = serverService.metadata;
+  const client = new ftp.Client();
+  await client.access({
+    host: `${name}.${namespace}.svc.cluster.local`,
+    user: "minecluster",
+    password: "minecluster",
+  });
+  return client;
+}
+
+export async function useServerFtp(serverSpec, fn) {
+  const { name } = serverSpec;
+  const server = await getServerAssets(name);
+  if (!server)
+    throw new ExpressClientError({
+      c: 404,
+      m: "No resources for that server were found!",
+    });
+  if (!server.service)
+    throw new ExpressClientError({
+      c: 409,
+      m: "Service doesn't exist, please contact your hosting provider!",
+    });
+  const client = await getFtpClient(server.service);
+  const result = await fn(client);
+  client.close();
+  return result;
+}
+
+export async function listServerFiles(serverSpec) {
+  const { path } = serverSpec;
+  const files = useServerFtp(serverSpec, async (c) => await c.list(path)).catch(
+    handleError,
+  );
+  return files;
+}
+
+export async function createServerFolder(serverSpec) {
+  const { path } = serverSpec;
+  pathSecurityCheck(path);
+  await useServerFtp(serverSpec, async (c) => c.ensureDir(path)).catch(
+    handleError,
+  );
+}
+
+export async function removeServerItem(serverSpec) {
+  const { path, isDir } = serverSpec;
+  pathSecurityCheck(path);
+  await useServerFtp(serverSpec, async (c) => {
+    if (isDir) await c.removeDir(path);
+    else await c.remove(path);
+  }).catch(handleError);
+}
+
+export async function uploadServerItem(serverSpec, file) {
+  const fileStream = Readable.from(file.buffer);
+  const { path } = serverSpec;
+  pathSecurityCheck(path);
+  await useServerFtp(serverSpec, async (c) => {
+    await c.uploadFrom(fileStream, `${path}/${file.originalname}`);
+  }).catch(handleError);
+}
+
+export async function getServerItem(serverSpec, writableStream) {
+  const { path } = serverSpec;
+  const ds = new Transform({ transform: (c, e, cb) => cb(null, c) });
+  pathSecurityCheck(path);
+  const ftpTransfer = useServerFtp(serverSpec, async (c) => {
+    await c.downloadTo(ds, path);
+  }).catch(handleError);
+  return { ds, ftpTransfer };
+}