fix: update CLIFileExistenceChecker to accept containerId in constructor

server/src/api/controllers/commandController.ts

@@ -39,7 +39,7 @@ export const newCommand = asyncHandler(async (req: Request, res: Response) => {
   const gameSession = new GameSession(
     session,
     quest,
-    new CLIFileExistenceChecker()
+    new CLIFileExistenceChecker(session.containerId!)
   )
 
   const event = await gameSession.runCommand(command)

server/src/containers/cli.ts

@@ -7,14 +7,15 @@ function sanitizeId(id: string) {
   return id.replace(/[^a-zA-Z0-9]/g, '')
 }
 
-// eslint-disable-next-line import/prefer-default-export
-export function checkFile(id: string, file: IFileInput) {
+export class CLIFileExistenceChecker implements IFileExistenceChecker {
+  constructor(private readonly containerId: string) {}
+  exists(file: IFileInput) {
     return new Promise<boolean>((resolve) => {
       const cmd = buildFileCheckCmd(file)
       // WARNING: This is vulnerable to command injection
       execFile(
         'docker',
-      ['exec', sanitizeId(id), ...cmd],
+        ['exec', sanitizeId(this.containerId), ...cmd],
         { timeout: 1000 },
         (error) => {
           const exists = !error
@@ -23,10 +24,4 @@ export function checkFile(id: string, file: IFileInput) {
       )
     })
   }
-
-export class CLIFileExistenceChecker implements IFileExistenceChecker {
-  // eslint-disable-next-line class-methods-use-this
-  async exists(file: IFileInput) {
-    return checkFile(file.path, file)
-  }
 }