fix(repository): Move backend code into subdirectory

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

backend/src/monitoring/monitoring.module.ts

@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { Module } from '@nestjs/common';
+
+import { LoggerModule } from '../logger/logger.module';
+import { MonitoringService } from './monitoring.service';
+
+@Module({
+  providers: [MonitoringService],
+  exports: [MonitoringService],
+  imports: [LoggerModule],
+})
+export class MonitoringModule {}

backend/src/monitoring/monitoring.service.spec.ts

@@ -0,0 +1,24 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { Test, TestingModule } from '@nestjs/testing';
+
+import { MonitoringService } from './monitoring.service';
+
+describe('MonitoringService', () => {
+  let service: MonitoringService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [MonitoringService],
+    }).compile();
+
+    service = module.get<MonitoringService>(MonitoringService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});

backend/src/monitoring/monitoring.service.ts

@@ -0,0 +1,29 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { Injectable } from '@nestjs/common';
+
+import { getServerVersionFromPackageJson } from '../utils/serverVersion';
+import { ServerStatusDto } from './server-status.dto';
+
+@Injectable()
+export class MonitoringService {
+  async getServerStatus(): Promise<ServerStatusDto> {
+    return {
+      connectionSocketQueueLength: 0,
+      distinctOnlineUsers: 0,
+      disconnectSocketQueueLength: 0,
+      distinctOnlineRegisteredUsers: 0,
+      isConnectionBusy: false,
+      isDisconnectBusy: false,
+      notesCount: 0,
+      onlineNotes: 0,
+      onlineRegisteredUsers: 0,
+      onlineUsers: 0,
+      registeredUsers: 0,
+      serverVersion: await getServerVersionFromPackageJson(),
+    };
+  }
+}

backend/src/monitoring/server-status.dto.ts

@@ -0,0 +1,48 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { ApiProperty } from '@nestjs/swagger';
+
+import { BaseDto } from '../utils/base.dto.';
+
+export class ServerVersion {
+  @ApiProperty()
+  major: number;
+  @ApiProperty()
+  minor: number;
+  @ApiProperty()
+  patch: number;
+  @ApiProperty()
+  preRelease?: string;
+  @ApiProperty()
+  commit?: string;
+}
+
+export class ServerStatusDto extends BaseDto {
+  @ApiProperty()
+  serverVersion: ServerVersion;
+  @ApiProperty()
+  onlineNotes: number;
+  @ApiProperty()
+  onlineUsers: number;
+  @ApiProperty()
+  distinctOnlineUsers: number;
+  @ApiProperty()
+  notesCount: number;
+  @ApiProperty()
+  registeredUsers: number;
+  @ApiProperty()
+  onlineRegisteredUsers: number;
+  @ApiProperty()
+  distinctOnlineRegisteredUsers: number;
+  @ApiProperty()
+  isConnectionBusy: boolean;
+  @ApiProperty()
+  connectionSocketQueueLength: number;
+  @ApiProperty()
+  isDisconnectBusy: boolean;
+  @ApiProperty()
+  disconnectSocketQueueLength: number;
+}