relocate auth module

backend/src/managers/auth/guards/localauth.strategy.ts

@@ -0,0 +1,22 @@
+import { Injectable, UnauthorizedException } from '@nestjs/common';
+import { PassportStrategy } from '@nestjs/passport';
+import { Strategy } from 'passport-local';
+import { AsyncFailable, HasFailed } from 'picsur-shared/dist/types';
+import { EUserBackend } from '../../../models/entities/user.entity';
+import { AuthManagerService } from '../auth.service';
+
+@Injectable()
+export class LocalAuthStrategy extends PassportStrategy(Strategy, 'local') {
+  constructor(private authService: AuthManagerService) {
+    super();
+  }
+
+  async validate(username: string, password: string): AsyncFailable<EUserBackend> {
+    const user = await this.authService.authenticate(username, password);
+    if (HasFailed(user)) {
+      throw new UnauthorizedException();
+    }
+
+    return user;
+  }
+}