Clean up code and add logging framework for backend

backend/src/services/sinusbot.service.ts

@@ -3,6 +3,7 @@ import { TunakillUser } from "../models/TunakillUser";
 import {HttpException, HttpStatus, Injectable} from "@nestjs/common";
 import {TunakillLogin} from "../models/TunakillLogin";
 import fetch from 'node-fetch';
+import logger from "../logger/Logger";
 
 @Injectable()
 export class SinusBotService {
@@ -25,23 +26,27 @@ export class SinusBotService {
 
   public async fetchStats(): Promise<TableEntry[]> {
     if (this.bearer == null) {
-      console.log(`Hey! I'm trying to get my Bearer token!`);
+      logger.info(`Hey! I'm trying to get my Bearer token!`);
       await this.login()
-        .then(res => this.logResponse(res))
         .then(token => this.bearer = token)
         .catch(error => {
+          logger.error(`Oh oh! Something went wrong while fetching Bearer token.`, error);
           throw this.createHttpException(HttpStatus.UNAUTHORIZED, error.message);
         });
-      console.log(`Seems like I have my Bearer token! It's called: ${this.bearer}`);
+      logger.debug(
+        `Seems like I have my Bearer token! 
+        Looks like it's ${this.bearer == null ? 'undefined' : 'not undefined'}`
+      );
     }
 
-    console.log(`I try to fetch user data now!`)
+    logger.info(`I try to fetch user data now! The URL is called ${this.tunaKillURL}`);
     return await fetch(this.tunaKillURL, this.requestConfig(null, this.bearer))
       .then(res => this.checkStatus(res))
       .then(res => res.json())
       .then(data => this.consumeTunakillResponse(data))
       .catch(error => {
-        throw this.createHttpException(HttpStatus.UNAUTHORIZED, error.message);
+        logger.error(`I couldn't fetch user data.`, error);
+        throw this.createHttpException(error.statusCode, error.message);
       });
   }
 
@@ -50,16 +55,17 @@ export class SinusBotService {
    */
   private async login(): Promise<string> {
     if (this.botInfo.id == null) {
-      console.log(`I have to fetch a bot ID before I can continue!`);
+      logger.debug(`I have to fetch a bot ID before I can continue!`);
       await this.fetchDefaultBotId()
         .then(defaultBotId => this.botInfo.id = defaultBotId)
-        .catch(() => {
+        .catch(error => {
+          logger.warn(`I couldn't retrieve SinusBot bot information. Login is likely to fail!`, error);
           throw this.createHttpException(
             HttpStatus.NOT_FOUND,
             `Could not fetch enough bot information for further requests.`
           );
         });
-      console.log(`Looks like everything went fine. The bot ID now is ${this.botInfo.id}`);
+      logger.info(`The bot ID now is ${this.botInfo.id}`);
     }
 
     const body: TunakillLogin = {
@@ -68,7 +74,7 @@ export class SinusBotService {
       botId: this.botInfo.id
     }
 
-    console.log(`> I try to login now! My credentials are: ${JSON.stringify(body)}`)
+    logger.info(`Logging in for Bearer token!`)
     return await fetch(this.loginURL, this.requestConfig(JSON.stringify(body)))
       .then(res => this.checkStatus(res))
       .then(res => res.json())
@@ -154,8 +160,8 @@ export class SinusBotService {
     return `${d}d ${h}h ${m}m ${s}s`;
   }
 
-  private logResponse(res: any) {
-    console.log(res);
+  private static logResponse(res: any) {
+    logger.debug(res);
     return res;
   }
 }