docs: Add comments to logs service and controller

src/app.controller.ts

@@ -4,9 +4,4 @@ import { AppService } from './app.service';
 @Controller()
 export class AppController {
   constructor(private readonly appService: AppService) {}
-
-  @Get()
-  getHello(): string {
-    return this.appService.getHello();
-  }
 }

src/logs/logs.controller.ts

@@ -6,21 +6,30 @@ import { ILogs } from './logs.interface';
 export class LogsController {
     constructor(private readonly logsService: LogsService) {}
     
+    // GET /logs Endpoint
+    // Get all logs from Mongo
     @Get()
-    async getPosts() {
+    async getLogs() {
+      // Get and return logs from logsRervice
       return this.logsService.getLogs();
     }
 
+    // POST /logs Endpoint
+    // Store a new log into Mongo
     @Post()
     async postLogs(@Body() body, @Response() res: any) {
-      let success: Boolean = await this.logsService.storeLog(body);      
+      // Try to store data into Mongo
+      let success: Boolean = await this.logsService.storeLog(body);
+      // If the operation was successful
       if (success){
+        // respond with HTTP Code 201 CREATED
+        // and a success message
         return res.status(HttpStatus.CREATED)
                       .json({
                               message: "Log stored successfully!"
                       });
-        
       } else {
+        // If not, respond with 500, internal server error and an error message
         return res.status(HttpStatus.INTERNAL_SERVER_ERROR)
         .json({
                 message: "An error occured during storing the log."

src/logs/logs.service.spec.ts

@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { LogsService } from './logs.service';
+
+describe('LogsService', () => {
+  let service: LogsService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [LogsService],
+    }).compile();
+
+    service = module.get<LogsService>(LogsService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});

src/logs/logs.service.ts

@@ -6,22 +6,29 @@ import { Model } from 'mongoose';
 @Injectable()
 export class LogsService {
     constructor(@InjectModel('Logs') private readonly logsModel: Model<ILogs>) {}
+
+    // Method to get all logs from Mongo
     async getLogs(): Promise<Object> {
         return await this.logsModel.find();
     }
 
+    // Method to get the count of the logs
     getLogsCount(): Number {
         return this.logsModel.count();
     }
 
+    // Store logs into Mongo collection
     async storeLog(data: Object): Promise<Boolean>{
+        // Create new Model object with data from request
         const storedLog = new this.logsModel({
             drone_id: data["id"],
             gprmc: data["GPRMC"],
             gps_data: data["gps_data"],
             sensorReadings: data["sensorReadings"]
         });
+        // Store data to Mongo
         let id = await storedLog.save();
+        // Print out the Mongo DB response
         console.log(id);
         return true;
     }