feat(api/private/me): include authProvider in UserInfo

This information is supposed to be used by the frontend
to identify the login method that was used.

The used login method is saved as a string into the session data
and extracted via a new SessionAuthProvider decorator.

Signed-off-by: David Mehren <git@herrmehren.de>

src/users/user-info.dto.ts

@@ -51,3 +51,12 @@ export class FullUserInfoDto extends UserInfoDto {
   @IsString()
   email: string;
 }
+
+export class UserLoginInfoDto extends UserInfoDto {
+  /**
+   * Identifier of the auth provider that was used to log in
+   */
+  @ApiProperty()
+  @IsString()
+  authProvider: string;
+}

src/users/users.service.ts

@@ -9,7 +9,11 @@ import { Repository } from 'typeorm';
 
 import { AlreadyInDBError, NotInDBError } from '../errors/errors';
 import { ConsoleLoggerService } from '../logger/console-logger.service';
-import { FullUserInfoDto, UserInfoDto } from './user-info.dto';
+import {
+  FullUserInfoDto,
+  UserInfoDto,
+  UserLoginInfoDto,
+} from './user-info.dto';
 import { UserRelationEnum } from './user-relation.enum';
 import { User } from './user.entity';
 
@@ -131,4 +135,8 @@ export class UsersService {
       email: user.email ?? '',
     };
   }
+
+  toUserLoginInfoDto(user: User, authProvider: string): UserLoginInfoDto {
+    return { ...this.toUserDto(user), authProvider };
+  }
 }