fix(repository): Move backend code into subdirectory

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

backend/src/identity/local/local.strategy.ts

@@ -0,0 +1,56 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { Injectable, UnauthorizedException } from '@nestjs/common';
+import { AuthGuard, PassportStrategy } from '@nestjs/passport';
+import { Strategy } from 'passport-local';
+
+import {
+  InvalidCredentialsError,
+  NoLocalIdentityError,
+} from '../../errors/errors';
+import { ConsoleLoggerService } from '../../logger/console-logger.service';
+import { UserRelationEnum } from '../../users/user-relation.enum';
+import { User } from '../../users/user.entity';
+import { UsersService } from '../../users/users.service';
+import { IdentityService } from '../identity.service';
+
+@Injectable()
+export class LocalAuthGuard extends AuthGuard('local') {}
+
+@Injectable()
+export class LocalStrategy extends PassportStrategy(Strategy, 'local') {
+  constructor(
+    private readonly logger: ConsoleLoggerService,
+    private userService: UsersService,
+    private identityService: IdentityService,
+  ) {
+    super();
+    logger.setContext(LocalStrategy.name);
+  }
+
+  async validate(username: string, password: string): Promise<User> {
+    try {
+      const user = await this.userService.getUserByUsername(username, [
+        UserRelationEnum.IDENTITIES,
+      ]);
+      await this.identityService.checkLocalPassword(user, password);
+      return user;
+    } catch (e) {
+      if (
+        e instanceof InvalidCredentialsError ||
+        e instanceof NoLocalIdentityError
+      ) {
+        this.logger.log(
+          `User with username '${username}' could not log in. Reason: ${e.name}`,
+        );
+        throw new UnauthorizedException(
+          'This username and password combination is not valid.',
+        );
+      }
+      throw e;
+    }
+  }
+}

backend/src/identity/local/login.dto.ts

@@ -0,0 +1,13 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { IsString } from 'class-validator';
+
+export class LoginDto {
+  @IsString()
+  username: string;
+  @IsString()
+  password: string;
+}

backend/src/identity/local/register.dto.ts

@@ -0,0 +1,17 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { IsString } from 'class-validator';
+
+export class RegisterDto {
+  @IsString()
+  username: string;
+
+  @IsString()
+  displayName: string;
+
+  @IsString()
+  password: string;
+}

backend/src/identity/local/update-password.dto.ts

@@ -0,0 +1,13 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { IsString } from 'class-validator';
+
+export class UpdatePasswordDto {
+  @IsString()
+  currentPassword: string;
+  @IsString()
+  newPassword: string;
+}