fix: extract shared ssh utilities

server/api/download.get.ts

@@ -1,55 +1,15 @@
-import { execFile, spawn } from "node:child_process"
 import { Readable } from "node:stream"
-import folderMap from "../config/backup-folders.json"
-
-const REMOTE_HOST = process.env.BACKUPS_REMOTE_HOST || "malio-b"
-const REMOTE_ROOT = process.env.BACKUPS_REMOTE_ROOT || "/home/malio-b/backups"
-const FOLDER_MAP = folderMap as Record<string, string>
+import {
+  runSsh,
+  shellQuote,
+  resolveFolderRemoteDir,
+  REMOTE_HOST,
+} from "../utils/ssh.ts"
+import {spawn} from "unenv/node/child_process";
 
 const isSafeFolder = (value: string) => /^[a-zA-Z0-9._-]+$/.test(value)
 const isSafeFile = (value: string) => /^[a-zA-Z0-9._-]+$/.test(value)
-const shellQuote = (value: string) => `'${value.replace(/'/g, `'\\''`)}'`
 
-function runSsh(command: string): Promise<string> {
-  return new Promise((resolve, reject) => {
-    execFile(
-      "ssh",
-      ["-o", "BatchMode=yes", "-o", "ConnectTimeout=5", REMOTE_HOST, command],
-      { maxBuffer: 10 * 1024 * 1024 },
-      (error, stdout, stderr) => {
-        if (error) {
-          reject(stderr || error.message)
-          return
-        }
-        resolve(stdout)
-      }
-    )
-  })
-}
-
-async function remoteDirExists(remoteDir: string): Promise<boolean> {
-  const output = await runSsh(`[ -d ${shellQuote(remoteDir)} ] && echo yes || echo no`)
-  return output.trim() === "yes"
-}
-
-async function resolveFolderRemoteDir(folderName: string): Promise<string | null> {
-  const mapped = FOLDER_MAP[folderName]
-  if (mapped) {
-    return `${REMOTE_ROOT}/${mapped}`
-  }
-
-  const direct = `${REMOTE_ROOT}/${folderName}`
-  if (await remoteDirExists(direct)) {
-    return direct
-  }
-
-  const nested = `${REMOTE_ROOT}/bdd_recette/${folderName}`
-  if (await remoteDirExists(nested)) {
-    return nested
-  }
-
-  return null
-}
 
 function buildContentDisposition(fileName: string) {
   const asciiName = fileName.replace(/[^\x20-\x7E]/g, "_").replace(/["\\]/g, "_")