From 238ce0289c196008a53c7ef03628534dab3505df Mon Sep 17 00:00:00 2001
From: Andrii Arsenin <ars9@pm.me>
Date: Tue, 7 Apr 2026 12:40:03 +0300
Subject: [PATCH] feat(auth): add GET /keys to list available key identifiers

---
 src/auth/auth.controller.ts | 9 ++++++++-
 src/auth/auth.service.ts    | 7 +++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/auth/auth.controller.ts b/src/auth/auth.controller.ts
index 48cdbe9..c0f74bd 100644
--- a/src/auth/auth.controller.ts
+++ b/src/auth/auth.controller.ts
@@ -1,4 +1,4 @@
-import { Body, Controller, Post } from '@nestjs/common';
+import { Body, Controller, Get, Post } from '@nestjs/common';
 import { ApiOperation, ApiResponse, ApiTags } from '@nestjs/swagger';
 import { AuthService } from './auth.service';
 import { LoginDto } from './dto/login.dto';
@@ -8,6 +8,13 @@ import { LoginDto } from './dto/login.dto';
 export class AuthController {
   constructor(private readonly authService: AuthService) {}
 
+  @Get('keys')
+  @ApiOperation({ summary: 'List available key identifiers from the keys directory' })
+  @ApiResponse({ status: 200, description: 'List of key names', schema: { properties: { keys: { type: 'array', items: { type: 'string' } } } } })
+  listKeys(): { keys: string[] } {
+    return { keys: this.authService.listKeys() };
+  }
+
   @Post('login')
   @ApiOperation({ summary: 'Log in using a file key and return the session token' })
   @ApiResponse({ status: 201, description: 'Login successful', schema: { properties: { token: { type: 'string' }, sessionName: { type: 'string' } } } })
diff --git a/src/auth/auth.service.ts b/src/auth/auth.service.ts
index 269f92a..d564e80 100644
--- a/src/auth/auth.service.ts
+++ b/src/auth/auth.service.ts
@@ -40,6 +40,13 @@ export class AuthService {
     );
   }
 
+  listKeys(): string[] {
+    if (!fs.existsSync(this.keysDir)) return [];
+    return fs.readdirSync(this.keysDir)
+      .filter(f => f.endsWith('.json'))
+      .map(f => path.basename(f, '.json'));
+  }
+
   async login(keyId: string, sessionName?: string): Promise<{ token: string; sessionName: string }> {
     const resolvedSession = sessionName ?? crypto.randomUUID();